Detailed DescriptionThe embodiment of the disclosure provides a communication method, a transmitter, a receiver and a communication system.
In a first aspect, embodiments of the present disclosure propose a communication method, performed by a transmitter, the method comprising:
A first OFDM symbol is transmitted, the first OFDM symbol including a perceptual reference signal and a communication signal for data transmission.
In the above embodiment, the first OFDM symbol includes the sensing reference signal and the communication signal, that is, the first OFDM symbol may be used for sensing and communication at the same time, and resources other than the sensing reference signal in the first OFDM symbol may be used for transmitting communication data, so that the throughput of the communication link may be improved, and the spectral efficiency of the communication integrated system may be improved.
With reference to some embodiments of the first aspect, in some embodiments, the transmitting the first OFDM symbol includes:
and transmitting L first OFDM symbols, wherein the L first OFDM symbols are continuous in the time domain, and L is an integer greater than or equal to 1.
In the above embodiment, one or more first OFDM symbols may be continuously transmitted in the time domain.
With reference to some embodiments of the first aspect, in some embodiments, a total length of the L first OFDM symbols is equal to a length of the second OFDM symbols.
In the above embodiment, the second OFDM symbol may be an OFDM symbol used for communication, and thus one or more first OFDM symbols may be transmitted during a time of one second OFDM symbol (e.g., a communication OFDM symbol). On one hand, when a target with a relatively short distance needs to be sensed, an overlong cyclic prefix is not required to be set, so that a plurality of first OFDM symbols can be continuously transmitted in the time of one communication OFDM symbol by reducing the length of the cyclic prefix, which is equivalent to that a plurality of sensing reference signals are transmitted in the time of one communication OFDM symbol, thereby performing a plurality of sensing measurements on the sensing target, being beneficial to improving the sensing accuracy, especially for the sensing target with the relatively short distance, and on the other hand, a plurality of communication signals are simultaneously transmitted, and being beneficial to wireless communication.
With reference to some embodiments of the first aspect, in some embodiments, the method further includes:
First information is transmitted to a receiver, the first information being for the receiver to receive the communication signal in the first OFDM symbol.
In the above embodiment, the first information may be transmitted to the receiver, and thus the receiver may implement reception of the communication signal in the first OFDM symbol according to the first information.
With reference to some embodiments of the first aspect, in some embodiments, the first information includes at least one of:
a first parameter for indicating a subcarrier bandwidth of the first OFDM symbol;
A second parameter indicating a rate matching pattern of the first OFDM symbol;
A power ratio indicating a ratio between an average transmit power (ENERGY PER RE, EPRE) of each resource element RE in a second OFDM symbol and an average transmit power of each RE in the first OFDM symbol.
In the above-described embodiment, at least one of the first parameter, the second parameter, and the power ratio may be transmitted to the receiver, and thus the receiver may implement reception of the communication signal in the first OFDM symbol according to the received parameter.
With reference to some embodiments of the first aspect, in some embodiments, the first parameter includes at least one of:
the number L of the first OFDM symbols;
a cyclic prefix length MCP of the first OFDM symbol;
A discrete fourier transform length MDFT of the first OFDM symbol;
A ratio between the MCP and the MDFT;
A ratio between the length of the MCP and the first OFDM symbol;
a subcarrier bandwidth of the first OFDM symbol;
A subcarrier bandwidth ratio, the subcarrier bandwidth ratio being a ratio between a subcarrier bandwidth of the first OFDM symbol and a subcarrier bandwidth of the second OFDM symbol;
And the logarithmic result of the subcarrier bandwidth ratio.
In the above embodiment, at least one of the above parameters may be transmitted to the receiver, and the receiver may determine the subcarrier bandwidth employed by the first OFDM symbol according to the received parameters.
With reference to some embodiments of the first aspect, in some embodiments, the second parameter includes at least one of:
A numbering set of OFDM subcarriers occupied by the sensing reference signals;
A parameter for determining the number of OFDM sub-carriers occupied by the perceptual reference signal;
a numbered set of a first OFDM symbol within a slot;
The number of the first OFDM symbol of the L consecutive first OFDM symbols in the slot.
In the above embodiment, at least one of the above parameters may be sent to the receiver, and the receiver may determine, according to the received parameter, resources in the first OFDM symbol that are not available for wireless communication, so as to skip resource elements that are not available for wireless communication, for example, skip resource elements occupied by the sensing reference signal, when receiving the communication signal.
With reference to some embodiments of the first aspect, in some embodiments, the first information is carried in at least one of:
Downlink control information (Downlink Control Information, DCI);
A media access Control (MEDIA ACCESS Control, MAC) Control Element (CE) message;
a radio resource control (Radio Resource Control, RRC) message;
Side link control information (Sidelink control information, SCI).
In a second aspect, embodiments of the present disclosure propose a communication method, performed by a receiver, the method comprising:
a first OFDM symbol is received, the first OFDM symbol including a perceptual reference signal and a communication signal for data transmission.
In the above embodiment, the first OFDM symbol includes the sensing reference signal and the communication signal, that is, the first OFDM symbol may be used for sensing and communication at the same time, and resources other than the sensing reference signal in the first OFDM symbol may be used for transmitting communication data, so that the throughput of the communication link may be improved, and the spectral efficiency of the communication integrated system may be improved.
With reference to some embodiments of the second aspect, in some embodiments, the receiving the first OFDM symbol includes:
L first OFDM symbols are received, the L first OFDM symbols are continuous in the time domain, and L is an integer greater than or equal to 1.
With reference to some embodiments of the second aspect, in some embodiments, a total length of the L first OFDM symbols is equal to a length of the second OFDM symbols.
With reference to some embodiments of the second aspect, in some embodiments, the method further includes:
Receiving first information sent by a transmitter;
the receiving a first OFDM symbol includes:
the communication signal in the first OFDM symbol is received according to the first information.
In the above embodiment, the receiver may receive the first information sent by the transmitter, and implement reception of the communication signal in the first OFDM symbol according to the first information.
With reference to some embodiments of the second aspect, in some embodiments, the first information includes at least one of:
a first parameter for indicating a subcarrier bandwidth of the first OFDM symbol;
A second parameter indicating a rate matching pattern of the first OFDM symbol;
And the power ratio is used for indicating the ratio between the average transmission power of each resource element RE in the second OFDM symbol and the average transmission power of each RE in the first OFDM symbol.
With reference to some embodiments of the second aspect, in some embodiments, the first parameter includes at least one of:
the number L of the first OFDM symbols;
a cyclic prefix length MCP of the first OFDM symbol;
A discrete fourier transform length MDFT of the first OFDM symbol;
A ratio between the MCP and the MDFT;
A ratio between the length of the MCP and the first OFDM symbol;
a subcarrier bandwidth of the first OFDM symbol;
A subcarrier bandwidth ratio, the subcarrier bandwidth ratio being a ratio between a subcarrier bandwidth of the first OFDM symbol and a subcarrier bandwidth of a communication OFDM symbol;
And the logarithmic result of the subcarrier bandwidth ratio.
With reference to some embodiments of the second aspect, in some embodiments, the second parameter includes at least one of:
A numbering set of OFDM subcarriers occupied by the sensing reference signals;
A parameter for determining the number of OFDM sub-carriers occupied by the perceptual reference signal;
a numbered set of a first OFDM symbol within a slot;
The number of the first OFDM symbol of the L consecutive first OFDM symbols in the slot.
With reference to some embodiments of the second aspect, in some embodiments, the first information is carried in at least one of:
DCI;
A MAC CE message;
An RRC message;
SCI。
In a third aspect, an embodiment of the present disclosure proposes a transmitter comprising a transceiver module configured to transmit a first OFDM symbol comprising a perceptual reference signal and a communication signal for data transmission.
In a fourth aspect, an embodiment of the present disclosure proposes a receiver comprising a transceiver module configured to receive a first OFDM symbol comprising a perceptual reference signal and a communication signal for data transmission.
In a fifth aspect, the disclosed embodiments provide a communication device comprising one or more processors, wherein the communication device is configured to perform the method described in the first aspect or the alternative implementation of the first aspect of the disclosed embodiments.
In a sixth aspect, the disclosed embodiments provide a communication device comprising one or more processors, wherein the communication device is configured to perform the method described in the second aspect or the optional implementation manner of the second aspect of the disclosed embodiments.
In a seventh aspect, the disclosed embodiments provide a communication system including a transmitter configured to perform the method described in the first aspect or the alternative implementation of the first aspect of the disclosed embodiments, and a receiver configured to perform the method described in the second aspect or the alternative implementation of the second aspect of the disclosed embodiments.
In an eighth aspect, the presently disclosed embodiments provide a storage medium storing instructions that, when executed on a communication device, cause the communication device to perform a method as described in the first aspect or an alternative implementation of the first aspect, or a method as described in the second aspect or an alternative implementation of the second aspect, of the presently disclosed embodiments.
In a ninth aspect, the disclosed embodiments provide a program product which, when executed by a communication device, causes the communication device to perform a method as described in the first aspect or an alternative implementation of the first aspect, or a method as described in the second aspect or an alternative implementation of the second aspect, of the disclosed embodiments.
In a tenth aspect, the presently disclosed embodiments propose a computer program which, when run on a computer, causes the computer to perform the method as described in the first aspect or the alternative implementation of the first aspect of the presently disclosed embodiments, or the method as described in the second aspect or the alternative implementation of the second aspect.
In an eleventh aspect, embodiments of the present disclosure provide a chip or chip system. The chip or chip system comprises a processing circuit configured to perform the method as described in the first aspect or the alternative implementation of the first aspect of the embodiments of the present disclosure, or the method as described in the second aspect or the alternative implementation of the second aspect.
It will be appreciated that the above-described transmitter, receiver, communication device, communication system, storage medium, program product, computer program, chip or chip system are all adapted to perform the methods set forth in the embodiments of the present disclosure. Therefore, the advantages achieved by the method can be referred to as the advantages of the corresponding method, and will not be described herein.
The embodiment of the disclosure provides a communication method, a transmitter, a receiver and a communication system. In some embodiments, the transmitter may comprise a communication transmitter and the receiver may comprise a communication receiver.
The embodiments of the present disclosure are not intended to be exhaustive, but rather are exemplary of some embodiments and are not intended to limit the scope of the disclosure. In the case of no contradiction, each step in an embodiment may be implemented as an independent embodiment, and the steps may be arbitrarily combined, for example, a scheme in which part of the steps are removed in an embodiment may also be implemented as an independent embodiment, the order of the steps may be arbitrarily exchanged in an embodiment, further, alternative implementations in an embodiment may be arbitrarily combined, further, the embodiments may be arbitrarily combined, for example, part or all of the steps of different embodiments may be arbitrarily combined, and an embodiment may be arbitrarily combined with alternative implementations of other embodiments.
In the various embodiments of the disclosure, terms and/or descriptions of the various embodiments are consistent throughout the various embodiments and may be referenced to each other in the absence of any particular explanation or logic conflict, and features from different embodiments may be combined to form new embodiments in accordance with their inherent logic relationships.
The terminology used in the embodiments of the disclosure is for the purpose of describing particular embodiments only and is not intended to be limiting of the disclosure.
In the presently disclosed embodiments, elements that are referred to in the singular, such as "a," "an," "the," "said," etc., may mean "one and only one," or "one or more," "at least one," etc., unless otherwise indicated. For example, where an article (article) is used in translation, such as "a," "an," "the," etc., in english, a noun following the article may be understood as a singular expression or as a plural expression.
In the presently disclosed embodiments, "plurality" refers to two or more.
In some embodiments, terms such as "at least one of", "one or more of", "multiple of" and the like may be substituted for each other.
In some embodiments, the recitations of "A, B at least one of", "A and/or B", "in one case A, in another case B", "in one case A", "in another case B", etc., may include the following, in some embodiments A (A being performed independently of B), in some embodiments B (B being performed independently of A), in some embodiments A and B being selected for execution (A and B being selectively executed), in some embodiments A and B (both A and B being executed). Similar to the above when there are more branches such as A, B, C.
In some embodiments, the description modes such as A or B can comprise the following technical scheme, namely A (A is executed independently of B) in some embodiments, B (B is executed independently of A) in some embodiments, and A and B are selected to be executed (A and B are selectively executed) in some embodiments according to the situation. Similar to the above when there are more branches such as A, B, C.
The prefix words "first", "second", etc. in the embodiments of the present disclosure are only for distinguishing different description objects, and do not limit the location, order, priority, number, content, etc. of the description objects, and the statement of the description object refers to the claims or the description of the embodiment context, and should not constitute unnecessary limitations due to the use of the prefix words. For example, if the description object is a "field", the ordinal words before the "field" in the "first field" and the "second field" do not limit the position or the order between the "fields", and the "first" and the "second" do not limit whether the "fields" modified by the "first" and the "second" are in the same message or not. For another example, describing an object as "level", ordinal words preceding "level" in "first level" and "second level" do not limit priority between "levels". As another example, the number of descriptive objects is not limited by ordinal words, and may be one or more, taking "first device" as an example, where the number of "devices" may be one or more. Further, the objects modified by different prefix words may be the same or different, for example, the description object is a "device", the "first device" and the "second device" may be the same device or different devices, the types of which may be the same or different, and, further, the description object is an "information", the "first information" and the "second information" may be the same information or different information, and the contents thereof may be the same or different.
In some embodiments, "comprising a", "containing a", "for indicating a", "carrying a", may be interpreted as carrying a directly, or as indicating a indirectly.
In some embodiments, the terms "responsive to" and "responsive to determining" and "in the case of" in the first place "," when "," when "and" if "and the like may be substituted for each other.
In some embodiments, terms "greater than", "greater than or equal to", "not less than", "more than or equal to", "not less than", "above" and the like may be interchanged, and terms "less than", "less than or equal to", "not greater than", "less than or equal to", "not more than", "below", "lower than or equal to", "no higher than", "below" and the like may be interchanged.
In some embodiments, the apparatuses and devices may be interpreted as entities, or may be interpreted as virtual, and the names thereof are not limited to those described in the embodiments, and may also be interpreted as "device (apparatus)", "device)", "circuit", "network element", "node", "function", "unit", "component (section)", "system", "network", "chip system", "entity", "body", and the like in some cases.
In some embodiments, a "network" may be interpreted as an apparatus comprised in the network, e.g. an access network device, a core network device, etc.
In some embodiments, the "access network device (access network device, AN device)" may also be referred to as a "radio access network device (radio access network device, RAN DEVICE)", "Base Station (BS)", "radio base station (radio base station)", "fixed station (fixed station)", and in some embodiments may also be referred to as a "node)", "access point (access point)", "transmission point (transmission point, TP)", "Reception Point (RP)", "transmission and/or reception point (transmission/reception point), TRP)", "panel", "antenna panel (ANTENNA PANEL)", "antenna array (ANTENNA ARRAY)", "cell", "macro cell", "small cell (SMALL CELL)", "femto cell", "pico cell", "sector", "cell group", "serving cell", "carrier", "component carrier (component carrier)", "bandwidth part (BWP)", etc.
In some embodiments, a "terminal" or "terminal device (TERMINAL DEVICE)" may be referred to as a "User Equipment (UE)", "user terminal" (MS) "," mobile station (MT) ", subscriber station (subscriber station), mobile unit (mobile unit), subscriber unit (subscore unit), wireless unit (wireless unit), remote unit (remote unit), mobile device (mobile device), wireless device (WIRELESS DEVICE), wireless communication device (wireless communication device), remote device (remote device), mobile subscriber station (mobile subscriber station), access terminal (ACCESS TERMINAL), mobile terminal (mobile terminal), wireless terminal (WIRELESS TERMINAL), remote terminal (remote terminal), handheld device (handset), user agent (user), mobile client (client), and the like.
In some embodiments, the acquisition of data, information, etc. may comply with laws and regulations of the country of locale.
In some embodiments, data, information, etc. may be obtained after user consent is obtained.
Furthermore, each element, each row, or each column in the tables of the embodiments of the present disclosure may be implemented as a separate embodiment, and any combination of elements, any rows, or any columns may also be implemented as a separate embodiment.
Wireless communication and wireless awareness have a high degree of similarity. The integrated Communication (ISAC) of INTEGRATED SENSING AND can combine wireless Communication and wireless sensing, and close cooperation is introduced between the two, so that both the wireless Communication and the wireless sensing can benefit, the effectiveness and the reliability of the wireless Communication can be improved, and the accuracy of the wireless sensing can be improved. Moreover, devices that support both wireless communication and wireless awareness may reduce network deployment costs.
In wireless sensing, it is often necessary to estimate the distance, azimuth angle (e.g., horizontal and vertical) and speed of the sensing target. Generalized sensing also includes wireless tracking and radio frequency identification of sensing targets. To achieve high accuracy sensing, the transmitter typically transmits a dedicated reference signal for sensing, which is referred to hereinafter as a sensing reference signal for ease of description. Alternatively, the perceptual reference signal may not carry information or data for communication.
It is to be appreciated that wireless awareness can include a variety of awareness scenarios including, for example, awareness between terminals and network devices, awareness between network devices and network devices, and so forth.
In some embodiments, in a single station (monostatic) mode, the transmitter may transmit a perception reference signal and estimate at least one of a distance, angle, speed, etc. of the perception target by measuring echoes of the perception reference signal.
In some embodiments, in a dual station (bistatic) mode, the transmitter may transmit a perception reference signal, and the receiver receives the perception reference signal and measures the perception reference signal to estimate at least one of a distance, an angle, a speed, etc. of the perception target.
In single station mode, the transmitter and receiver may be located at the same device, e.g., at the same terminal or at the same network device. In the dual-station mode, the transmitter and the receiver may each be located in different devices, e.g. the transmitter is located in the terminal, the receiver is located in another terminal, e.g. the transmitter is located in the terminal, the receiver is located in a network device, e.g. the transmitter is located in the network device, the receiver is located in another network device, e.g. the transmitter is located in the network device, and the receiver is located in the terminal.
Taking the example of estimating the distance of the perceived object, the receiver needs to accurately estimate the arrival time of the first echo path (single station mode) reflected by the perceived object, or the first path scattered by the perceived object (double station mode). In order to ensure the accuracy of distance sensing, the sensing reference signal needs to have a larger bandwidth, so that higher time domain resolution and distance sensing accuracy can be achieved.
It can be appreciated that in an OFDM system, if the multipath delay spread of a wireless channel is greater than the length of a Cyclic Prefix (CP) in an OFDM symbol, inter-symbol interference (inter-symbol interference, ISI) may occur between OFDM symbols. When the multipath delay spread of the channel is less than the length of the cyclic prefix in the OFDM symbol, inter-symbol interference (ISI) can be eliminated. Thus, the perceived distance without ISI in an OFDM system is limited by the CP length within the OFDM symbol.
To extend the ISI-free range of perceived distances, the OFDM symbols used for perception may employ a different set of parameters (numerology) than the communication, i.e., a different subcarrier bandwidth than the OFDM symbols of the communication, a different CP length than the OFDM symbols of the communication, a different discrete fourier transform (discrete Fourier transform, DFT)/inverse discrete fourier transform (INVERSE DISCRETE Fourier transform, IDFT) length (number of points, size) than the OFDM symbols of the communication, etc.
From the perspective of perceptual performance, the perceptual reference signal does not necessarily use all subcarriers of the OFDM symbol used for the perception, i.e. Resource Elements (REs).
In some embodiments, taking distance sensing (ranging) as an example, a sensing reference signal of a mutual quality pattern or a sensing reference signal of a nested pattern can be adopted, so that a larger uniform degree of freedom (uniform degree of freedom, uDoF) and a higher time domain resolution can be achieved in a Khatri-Rao subspace, thereby obtaining high-precision distance sensing. In some embodiments, a uniform comb (comb) pattern of perceptual reference signals may be employed.
However, in the OFDM symbol for sensing, whether it is a mutual quality pattern, a nested pattern or a uniform comb pattern, the sensing reference signal occupies only a part of subcarriers and REs, and other subcarriers and REs have no benefit to sensing. Therefore, from the perspective of spectral efficiency (SPECTRAL EFFICIENCY, SE), subcarriers and REs in the OFDM symbol used for sensing other than the sensing reference signal may cause a decrease in SE.
In some embodiments, terms of a perceptual reference signal of a inter-quality pattern, a perceptual reference signal based on a inter-quality integer, a perceptual reference signal pattern based on a inter-quality integer, a perceptual reference signal inter-quality pattern, a inter-quality aware reference signal pattern, a perceptual reference signal, and the like may be interchanged. In some embodiments, the terms of the perceptual reference signal of the nested pattern, the perceptual reference signal nested pattern, the nested perceptual reference signal, the perceptual reference signal, and the like may be interchanged.
In some embodiments, terms for perceived OFDM symbols, OFDM symbols carrying perceived reference signals, and the like may be interchanged. Illustratively, the perceptual OFDM symbol includes a cyclic prefix and a perceptual reference signal. Illustratively, the perceived OFDM symbol also includes null resource elements depending on the pattern of the perceived reference signal, in other words, excluding the cyclic prefix, the perceived reference signal does not fill all subcarriers of the perceived OFDM symbol.
In some embodiments, terms of OFDM symbols used for communication, communication OFDM symbols, OFDM symbols carrying communication signals, and the like may be interchanged. Illustratively, the communication OFDM symbol includes a cyclic prefix and a communication signal, where the communication signal may carry information or data for communication. The communication signals may be used for data transmission.
The embodiment of the disclosure considers that a structural design of a first OFDM symbol is provided, and it should be noted that the first OFDM symbol may be used for sensing and communication at the same time.
In some embodiments, the terms first OFDM symbol, unified OFDM symbol, OFDM symbol carrying both perceptual reference signals and communication signals, and the like may be interchanged. Illustratively, the first OFDM symbol includes a perceptual reference signal and a communication signal. Illustratively, the first OFDM symbol includes a cyclic prefix, a perceptual reference signal, and a communication signal.
Fig. 1A shows an exemplary schematic diagram of a plurality of OFDM symbols that are contiguous in the time domain, as shown in fig. 1A, including one communication OFDM symbol, one first OFDM symbol, and one communication OFDM symbol in sequence, where the communication OFDM symbol may be used for communication, and the first OFDM symbol may be used for both sensing and communication. For example, the communication OFDM symbol includes a cyclic prefix and a communication signal, where the cyclic prefix is denoted as NCP sampling points, the communication signal is denoted as NFFT sampling points, and the length of the communication OFDM symbol is denoted as NOFDM,NOFDM, which is the number of sampling points, i.e., NOFDM＝NCP+NFFT. The first OFDM symbol includes a cyclic prefix, a perceptual reference signal and a communication signal, wherein the cyclic prefix is represented as MCP sample points, the perceptual reference signal and the communication signal are represented as MDFT sample points, and the length of the first OFDM symbol is MCP+MDFT.
In some embodiments, to ensure alignment with the communication OFDM symbols, the length of each first OFDM symbol (with cyclic prefix) may be equal to the length of the communication OFDM symbol (with cyclic prefix), i.e., MCP+MDFT＝NOFDM＝NCP+NFFT.
In some embodiments, for one first set of OFDM symbols, the first set of OFDM symbols consists of L first OFDM symbols that are contiguous in the time domain, where L is an integer greater than or equal to 1. Alternatively, the number L of first OFDM symbols included in different first OFDM symbol sets may be the same or different.
In some embodiments, to ensure alignment with the communication OFDM symbols, for a first set of OFDM symbols, the total length of the L first OFDM symbols (with cyclic prefix) in the set is equal to the length of the communication OFDM symbols (with cyclic prefix). That is, (MCP+MDFT)·L＝NOFDM. Where MCP+MDFT represents the length of a single first OFDM symbol, i.e. MCP+MDFT＝NOFDM/L＝(NCP+NFFT)/L.
According to the above embodiment, based on the first OFDM symbol set, the transmitter may transmit one or more first OFDM symbols during a time of one communication OFDM symbol. On one hand, when a target with a relatively short distance needs to be sensed, an overlong cyclic prefix is not required to be set, so that a plurality of first OFDM symbols can be continuously transmitted in the time of one communication OFDM symbol by reducing the length of the cyclic prefix, which is equivalent to that a plurality of sensing reference signals are transmitted in the time of one communication OFDM symbol, thereby performing a plurality of sensing measurements on the sensing target, being beneficial to improving the sensing accuracy, especially for the sensing target with the relatively short distance, and on the other hand, a plurality of communication signals are simultaneously transmitted, and being beneficial to wireless communication.
Fig. 1B shows an exemplary schematic diagram of a plurality of OFDM symbols that are consecutive in the time domain, including one communication OFDM symbol, consecutive L first OFDM symbols, and one communication OFDM symbol in sequence, as shown in fig. 1B. It should be noted that, fig. 1B is a schematic diagram shown by taking L >1 (specifically, l=2) as an example, and when l=1, a plurality of OFDM symbols that are continuous in the time domain may be referred to the schematic diagram shown in fig. 1A.
In some embodiments, the length of the cyclic prefix in the first OFDM symbol may be determined based on the perceived target range.
In some embodiments, the sampling rate fs can be kept unchanged, flexibly for the number L of the first OFDM symbols and the subcarrier bandwidthAnd DFT length MDFT, thereby changing the length of the cyclic prefix in the first OFDM symbol.
According to the first OFDM symbol proposed in the embodiments of the present disclosure, for wireless sensing, the length of the cyclic prefix in the first OFDM symbol may be flexibly adjusted, so that the ISI-free distance sensing range may be flexibly adjusted, and for wireless communication, resources other than the sensing reference signal in each first OFDM symbol may be used for transmitting communication data, so that the throughput of the communication link may be improved.
In some embodiments, the sampling rate of the first OFDM symbol may be the same as the sampling rate of the communication OFDM symbol. In some embodiments, the symbol length (with cyclic prefix) of the first OFDM symbol may be the same as the symbol length (with cyclic prefix) of the communication OFDM symbol. In some embodiments, the parameter set (numerology) of the first OFDM symbol may be different from the parameter set (numerology) of the communication OFDM symbol.
In the first OFDM symbol, the resources occupied by the sensing reference signal may be represented as a set Ksensing, alternatively, Ksensing is a set obtained by taking the union according to the set S(m) of the resources occupied by each sensing reference signal port. m may represent the port number of any of the sensing reference signal ports, wherein,Representing a numbered set of perceptual reference signal ports.
Wherein S(m) may be understood as a set or pattern of resource elements occupied by the sensing reference signal port m, or S(m) may be understood as a frequency domain pattern of the sensing reference signal port m, or S(m) may be understood as a set of subcarrier positions occupied by the sensing reference signal port m on the frequency domain. Optionally, S(m) includes the number of OFDM subcarriers occupied by the perceptual reference signal port on the frequency domain.
In some embodiments, S(m) may be determined by a variety of implementations, such as, but not limited to, at least one of the following implementations.
(1) Perceptual reference signal of a mutual quality pattern
In some embodiments, S(m) satisfies one of the following formulas ：S(m)＝{q·P·Kmin+NsubcPRB·K0+k0+m|q＝0,1,…,Q-1}∪{p·Q·Kmin+NsubcPRB·K0+k0+m|p＝0,1,…,2P-1};S(m)＝{q·P·Kmin+NsubcPRB·K0+k0+m|q＝0,1,…,Q-1}∪{p·Q·Kmin+NsubcPRB·K0+k0+m|p＝1,…,2P-1};S(m)＝{q·P·Kmin+NsubcPRB·K0+k0+m|q＝1,…,Q-1}∪{p·Q·Kmin+NsubcPRB·K0+k0+m|p＝0,1,…,2P-1};
Wherein:
P and Q are a pair of prime integers, i.e., P and Q have a greatest common divisor of 1 and P is less than Q.
Kmin denotes the minimum frequency domain interval between subcarriers in which frequency domain adjacent perceptual reference signals of the perceptual reference signal port m are located. Kmin can be expressed as the number of subcarriers.
NsubcPRB represents the number of subcarriers (e.g., 12) contained within one physical resource block (Physical Resource Block, PRB).
K0 denotes the number of the starting PRB of the perceptual reference signal port m relative to the common resource block (common resource block, CRB) 0. Or in other words, K0 represents the frequency domain offset of the starting PRB of the perceptual reference signal port m relative to CRB0, which is expressed as the number of PRBs.
K0 denotes the number of the starting subcarrier of the perceived reference signal port m within the PRB (starting PRB) in which it is located. Alternatively, k0∈[0,NsubcPRB).
M represents the port number of the sensing reference signal port. Optionally, m is a non-negative integer less than Kmin. Illustratively, m ε [0, Kmin).
(2) Perceptual reference signal of nested patterns
In some embodiments, S(m) satisfies one of the following formulas:
n represents the number of subcarriers occupied by the perceptual reference signal port m in the frequency domain.
Kmin denotes the minimum frequency domain interval between subcarriers in which frequency domain adjacent perceptual reference signals of the perceptual reference signal port m are located. Kmin can be expressed as the number of subcarriers.
NsubcPRB represents the number of subcarriers (e.g., 12) contained within one PRB.
K0 denotes the number of the starting PRB of the perceptual reference signal port m relative to CRB 0. Or in other words, K0 represents the frequency domain offset of the starting PRB of the perceptual reference signal port m relative to CRB0, which is expressed as the number of PRBs.
K0 denotes the number of the starting subcarrier of the perceived reference signal port m within the PRB (starting PRB) in which it is located. Alternatively, k0∈[0,NsubcPRB).
M represents the port number of the sensing reference signal port. Optionally, m is a non-negative integer less than Kmin. Illustratively, m ε [0, Kmin).
(3) Perceptual reference signal of uniform comb pattern
In some embodiments, S(m) satisfies the following equation S(m)＝{n·K1+NsubcPRB·K0+k0 +m|n=0,..n-1 };
n represents the number of subcarriers occupied by the perceptual reference signal port m in the frequency domain.
K1 denotes the frequency domain interval between subcarriers where the frequency domain adjacent perceptual reference signals of the perceptual reference signal port m are located. Alternatively, K1 may be expressed as the number of subcarriers.
NsubcPRB represents the number of subcarriers (e.g., 12) contained within one PRB.
K0 denotes the number of the starting PRB of the perceptual reference signal port m relative to CRB 0. Or in other words, K0 represents the frequency domain offset of the starting PRB of the perceptual reference signal port m relative to CRB0, which is expressed as the number of PRBs.
K0 denotes the number of the starting subcarrier of the perceived reference signal port m within the PRB (starting PRB) in which it is located. Alternatively, k0∈[0,NsubcPRB).
M represents the port number of the sensing reference signal port. Optionally, m is a non-negative integer less than Kmin. Illustratively, m ε [0, Kmin).
In some embodiments, in the first OFDM symbol, resources other than the resource set Ksensing occupied by the sensing reference signal may be used for wireless communication, and it may be understood that all or part of the resource elements other than the resource elements occupied by the sensing reference signal may be used for wireless communication, for example, all or part of the resource elements may be used for a physical downlink shared channel (physical downlink SHARED CHANNEL, PDSCH), or a physical downlink control channel (physical downlink control channel, PDCCH), or a Physical Uplink Shared Channel (PUSCH), or a physical uplink control channel (physical uplink control channel, PUCCH), or a physical side link shared channel (PHYSICAL SIDELINK SHARED CHANNEL, PSSCH), or a Demodulation reference signal (Demodulation REFERENCE SIGNAL, DMRS), or the like.
Based on the first OFDM symbol structure proposed by the embodiment of the present disclosure, the embodiment of the present disclosure proposes a communication system and a communication method.
Fig. 2 is a schematic diagram of a communication system shown in accordance with an embodiment of the present disclosure. As shown in fig. 2, communication system 200 may include a transmitter 101 and a receiver 102. In some embodiments, the transmitter comprises a communication transmitter. In some embodiments, the receiver comprises a communications receiver. In some embodiments, the receiver comprises a perception receiver.
It should be noted that the number of transmitters and the number of receivers shown in fig. 2 are only examples, and are not meant to limit embodiments of the disclosure, and in actual situations, the number of transmitters may be one or more, or the number of receivers may be one or more.
In some embodiments, the transmitter may be located at a terminal or network device.
In some embodiments, the receiver may be located at a terminal or network device.
In some embodiments, the transmitter and the receiver may be located in the same device, e.g., the transmitter and the receiver are located in the same terminal or in the same network device.
In some embodiments, the transmitter and the receiver may be located in different devices, respectively, such as the transmitter located at the terminal and the receiver located at another terminal, such as the transmitter located at the terminal and the receiver located at a network device, such as the transmitter located at the network device and the receiver located at another network device, such as the transmitter located at the network device and the receiver located at the terminal.
In some embodiments, the terminal may include at least one of a mobile phone (mobile phone), a wearable device, an internet of things device, a communication enabled car, a smart car, a tablet (Pad), a computer with wireless transceiving functionality, a Virtual Reality (VR) terminal device, an augmented reality (augmented reality, AR) terminal device, a wireless terminal device in industrial control (industrial control), a wireless terminal device in unmanned-drive (self-driving), a wireless terminal device in teleoperation (remote medical surgery), a wireless terminal device in smart grid (SMART GRID), a wireless terminal device in transportation security (transportation safety), a wireless terminal device in smart city (SMART CITY), a wireless terminal device in smart home (smart home), but is not limited thereto.
In some embodiments, the network device is, for example, an access network device, which may include at least one of an evolved NodeB (eNB), a next generation NodeB (next generation eNB, ng-eNB), a next generation NodeB (gNB), a NodeB (NB), a Home NodeB (HNB), a home enodeb (home evolved nodeB, heNB), a wireless backhaul device, a wireless network controller (radio network controller, RNC), a base station controller (base station controller, BSC), a base transceiver station (base transceiver station, BTS), a Base Band Unit (BBU), a mobile switching center, a base station in a 6G communication system, an Open base station (Open RAN), a Cloud base station (Cloud RAN), a base station in other communication systems, an access node in a Wi-Fi system, and the like in a 5G communication system.
Fig. 3 is an interactive schematic diagram illustrating one communication method according to an embodiment of the present disclosure. As shown in fig. 3, the communication method includes:
in step S3101, the transmitter transmits first information to the receiver.
In some embodiments, the first information is for a receiver to receive a communication signal in a first OFDM symbol.
In some embodiments, the receiver receives first information transmitted by the transmitter. Whereby the receiver receives the communication signal in the first OFDM symbol in accordance with the first information.
In some embodiments, the first information may include, but is not limited to, at least one of the following parameters (a) - (c):
(a) A first parameter indicating a subcarrier bandwidth of the first OFDM symbol.
In some embodiments, the first parameter indicates a subcarrier bandwidth of the first OFDM symbol, which may be a direct indication of subcarrier bandwidth, e.g., the first parameter includes subcarrier bandwidth. In some embodiments, the first parameter indicates a subcarrier bandwidth of the first OFDM symbol, which may be indirectly indicated, e.g., the first parameter includes other parameters that may determine the subcarrier bandwidth.
In some embodiments, the name of the first parameter is not limited, and may alternatively be described as a "parameter set (numerology)", for example.
In some embodiments, the first parameter may include, but is not limited to, at least one of the following parameters (a 1) - (a 7):
(a1) The number of first OFDM symbols: L.
For example, L is the number of consecutive first OFDM symbols in a slot.
(A2) The cyclic prefix length of the first OFDM symbol is MCP.
(A3) The Discrete Fourier Transform (DFT) length of the first OFDM symbol is MDFT.
Alternatively, the DFT length may alternatively be described as the number of DFT points, the DFT size, etc.
Alternatively, the DFT length/number/size may alternatively be described as IDFT length/number/size, or the like.
(A4) Cyclic prefix length ratio of the first OFDM symbol.
In some embodiments, the cyclic prefix length ratio may represent a ratio between the cyclic prefix length MCP and the DFT length MDFT in the first OFDM symbol.
It should be understood that in the embodiments of the present disclosure, "ratio between A and B" may be understood as the ratio of A to B, i.eOr can be understood as the ratio of B to A, i.e
Alternatively, the cyclic prefix length ratio may include: Or (b)
In some embodiments, the cyclic prefix length ratio may represent a ratio between the cyclic prefix length MCP in the first OFDM symbol and the length of the first OFDM symbol.
Alternatively, the cyclic prefix length ratio may include: Or (b)Or (b)Or (b)
(A5) Subcarrier bandwidth of the first OFDM symbol: Where fs is the sampling rate.
(A6) The subcarrier bandwidth ratio represents a ratio between the subcarrier bandwidth of the first OFDM symbol and the subcarrier bandwidth of the second OFDM symbol.
In some embodiments, the communication signal is included in the second OFDM symbol. In some embodiments, the second OFDM symbol may be a communication OFDM symbol as described previously. In some embodiments, the second OFDM symbol may also be a non-first OFDM symbol.
Alternatively, the subcarrier bandwidth ratio may include: Or (b)Where Δf(sensing&comm) is the subcarrier bandwidth of the first OFDM symbol, and Δf(comm) is the subcarrier bandwidth of the second OFDM symbol.
(A7) The first index μ represents the logarithmic result of the subcarrier bandwidth ratio.
In some embodiments of the present invention, in some embodiments,
In some embodiments, the name of the first index is not limited, and may be alternatively described as a parameter set index, or a parameter set index with reference to a parameter set used for communication, for example.
In some embodiments, the transmitter may transmit at least one of the above parameters (a 1) - (a 7) to the receiver. The receiver may determine the subcarrier bandwidth employed by the first OFDM symbol based on the parameters transmitted by the transmitter.
(B) A second parameter indicating a rate matching pattern of the first OFDM symbol.
In some embodiments, the rate matching pattern comprises a pattern of resources in the first OFDM symbol that are not available for wireless communication, e.g., the rate matching pattern comprises a pattern of OFDM subcarriers occupied by the perceptual reference signal in the first OFDM symbol.
In some embodiments, the second parameter comprises at least one of the following parameters (b 1) - (b 4):
(b1) A numbered set of OFDM subcarriers occupied by a perceptual reference signal:
In some embodiments, in the above number set, the number of the OFDM sub-carrier occupied by the sensing reference signal may include the number of the OFDM sub-carrier occupied by the sensing reference signal within the radio resource allocated to the receiver for communication.
In some embodiments, in the above numbering set, the number of OFDM subcarriers occupied by the perceptual reference signal may be the number of OFDM subcarriers relative to CRB 0.
In some embodiments, in the above-mentioned number set, the number of the OFDM subcarrier occupied by the sensing reference signal may be a number of a starting position of the OFDM subcarrier with respect to a radio resource allocated to the receiver for communication. For example, PRB2 through PRB3 are allocated to the receiver for communication, and then the number of OFDM subcarriers occupied by the perceptual reference signal may be the number of OFDM subcarriers relative to PRB 2.
(B2) And a parameter for determining the number of OFDM sub-carriers occupied by the sensing reference signal.
In some embodiments, the number of OFDM subcarriers occupied by the perceptual reference signal may be the number of OFDM subcarriers relative to CRB 0.
In some embodiments, parameter (b 2) may include P, Q, Kmin、K0、k0,At least one of them.
In some embodiments, parameter (b 2) may include N, Kmin、K0、k0,At least one of them.
In some embodiments, parameter (b 2) may include N, K1、K0、k0,At least one of them.
In some embodiments, the number of OFDM subcarriers occupied by the perceptual reference signal may be a number of OFDM subcarriers relative to a starting position of a radio resource allocated to the receiver for communication. For example, PRB2 through PRB3 are allocated to the receiver for communication, and then the number of OFDM subcarriers occupied by the perceptual reference signal may be the number of OFDM subcarriers relative to PRB 2.
In some embodiments, parameter (b 2) may include P, Q, Kmin、K0'、k0,At least one of them. Alternatively, K0' represents the number of starting PRBs of the perceived reference signal port relative to the starting position of the radio resources allocated to the receiver for communication, which may be expressed as the number of PRBs. Taking the nested pattern of the sensing reference signals as an example, the receiver can determine the number of each OFDM subcarrier occupied by each sensing reference signal port relative to the starting position of the radio resource allocated to the receiver for communication by replacing K0 in the formula with K0' according to the parameter (b 2).
In some embodiments, parameter (b 2) may include N, Kmin、K0'、k0,At least one of them.
In some embodiments, parameter (b 2) may include N, K1、K0'、k0,At least one of them.
From the parameter (b 2), the receiver may determine the number of OFDM sub-carriers occupied by the perceptual reference signal in the first OFDM symbol, alternatively, for example, the number of OFDM sub-carriers occupied by the perceptual reference signal with respect to CRB0, or the number of the starting position of the radio resource allocated to the receiver for communication.
In some embodiments, the transmitter may transmit one of the parameters (b 1) and (b 2).
(B3) The numbered set of the first OFDM symbol within the slot:
(b4) The number of the first OFDM symbol of the L consecutive first OFDM symbols in the slot.
In some embodiments, the transmitter may transmit at least one of the above parameters (b 1) - (b 4) to the receiver. The receiver may determine resources in the first OFDM symbol that are not available for wireless communication, e.g., determine OFDM subcarriers occupied by the perceptual reference signal in the first OFDM symbol, according to parameters sent by the transmitter, so as to skip resource elements that are not available for wireless communication, e.g., skip resource elements occupied by the perceptual reference signal, when receiving the communication signal. Alternatively, the receiver may determine resources not available for wireless communication in each first OFDM symbol within a slot based on parameters transmitted by the transmitter.
(C) A power ratio ρ indicating a ratio between an average transmit power (ENERGY PER RE, EPRE) of each RE in the second OFDM symbol and an average transmit power of each RE in the first OFDM symbol.
In some embodiments, the power ratio ρ may refer to a ratio of an average transmit power per RE within the second OFDM symbol to an average transmit power per RE within the first OFDM symbol. In some embodiments, the power ratio ρ may refer to a ratio of an average transmit power per RE within the first OFDM symbol to an average transmit power per RE within the second OFDM symbol.
In some embodiments, the second OFDM symbol and the first OFDM symbol referred to in the above parameters are resources allocated to the same receiver.
In some embodiments, the transmitter transmits a parameter (c), i.e., the transmit power ratio ρ, to the receiver. The receiver receives the communication signal in the first OFDM symbol according to the power ratio ρ.
According to the above embodiment, the first information may include at least one of the parameters (a 1) - (a 7), the parameters (b 1) - (b 4), and the parameter (c). For example, the first information may include a first index μ, N, Kmin、K0 (or K0')、k0),AndFor example, the first information may include a first index μ, P, Q, Kmin、K0 (or K0')、k0),And
In some embodiments, the transmitter may send at least one of the parameters (a 1) - (a 7), parameters (b 1) - (b 4), and parameters (c) to the receiver. For example, the transmitter may send the first index μ, N, Kmin、K0 (or K0')、k0),And
In some embodiments, the first information may be carried in at least one of:
Downlink control information (Downlink Control Information, DCI);
A media access Control (MEDIA ACCESS Control, MAC) Control Element (CE) message;
a radio resource control (Radio Resource Control, RRC) message;
Side link control information (Sidelink control information, SCI).
In some embodiments, the transmitter may notify the receiver of at least one of the parameters (a 1) - (a 7), the parameters (b 1) - (b 4), and the parameter (c) through at least one signaling.
In some embodiments, the signaling may include at least one of the following:
Uu interface, DCI, MAC CE and RRC signaling;
PC5 interface SCI and PC5RRC signaling.
In some embodiments, this step is optional. For example, the transmitter and the receiver are located at the same device, the transmitter may not transmit the first information.
In step S3102, the transmitter transmits the first OFDM symbol.
In some embodiments, the first OFDM symbol includes a perceptual reference signal and a communication signal.
In some embodiments, the first OFDM symbol includes a cyclic prefix, a perceptual reference signal, and a communication signal.
In some embodiments, the length of the first OFDM symbol (with cyclic prefix) is equal to the length of the second OFDM symbol (with cyclic prefix).
According to alternative implementations, in some embodiments, transmitting the first OFDM symbols may include transmitting L first OFDM symbols that are contiguous in the time domain, so the transmitter may transmit L first OFDM symbols that are contiguous in the time domain. Wherein L is an integer greater than or equal to 1.
In some embodiments, the total length of the L first OFDM symbols (with cyclic prefix) is equal to the length of the second OFDM symbols (with cyclic prefix).
In step S3103, the receiver receives the communication signal in the first OFDM symbol according to the first information.
According to an alternative implementation, in some embodiments, the receiver receives the first information, and the communication signal in the first OFDM symbol may then be received in accordance with the first information.
According to alternative implementations, in some embodiments, receiving the communication signal in the first OFDM symbol may include receiving the communication signal in L first OFDM symbols that are contiguous in the time domain, such that the receiver may continuously receive the communication signal in each of the L first OFDM symbols in the time domain.
According to the above embodiment, the transmitter transmits the first OFDM symbol including the sensing reference signal and the communication signal, i.e., the first OFDM symbol may be used for both sensing and communication, and the transmitter transmits the first information to the receiver, so that the receiver may receive the communication signal in the first OFDM symbol according to the first information. Resources except for the sensing reference signal in the first OFDM symbol can be used for transmitting communication data, so that the throughput of a communication link can be improved, and the frequency spectrum efficiency of the communication integrated system can be improved. According to an alternative implementation, the sensing system and the wireless communication system do not interfere with each other, and can ensure symbol level alignment with the wireless communication system, and are completely transparent to the wireless communication system.
The communication method according to the embodiment of the present disclosure may include at least one of step S3101 to step S3103. For example, step S3101 may be implemented as a separate embodiment, step S3101+ step S3102 may be implemented as a separate embodiment, step S3101+ step S3103 may be implemented as a separate embodiment, and step S3102+ step S3103 may be implemented as a separate embodiment.
In some embodiments, the names of information and the like are not limited to the names described in the embodiments, and terms such as "information", "message", "signaling", "configuration", "instruction", "parameter", and the like may be replaced with each other.
In some embodiments, terms such as "side," "side link," "side communication," "side link communication," "direct link," "direct communication," "direct link communication," and the like may be used interchangeably.
In some embodiments, terms such as "physical downlink shared channel (physical downlink SHARED CHANNEL, PDSCH)", "DL data", etc. may be replaced with each other, and terms such as "Physical Uplink Shared Channel (PUSCH)", "UL data", etc. may be replaced with each other.
According to the communication method of the embodiments of the present disclosure, some possible embodiments are exemplified.
In some embodiments, the communication transmitter informs the target communication receiver of at least one of the following parameters:
parameter set information of a first OFDM symbol;
A rate matching pattern (RATE MATCHING PATTERN, RMP), optionally comprising RMP corresponding to a subset (set of REs) of the union of all port patterns of the perceived reference signal within the time-frequency resources allocated to the target communication receiver, or RMP corresponding to the union of all port patterns of the perceived reference signal;
The ratio between the average transmit power (ENERGY PER RE, EPRE) of each RE within the communication OFDM symbol and the average transmit power of each RE within the first OFDM symbol, i.e. the power ratio ρ.
In some embodiments, the communication transmitter signals the at least one parameter to the target communication receiver. The signaling may include at least one of the following:
Uu interface, DCI, MAC CE and RRC signaling;
PC5 interface SCI and PC5RRC signaling.
In one possible embodiment, one gNB performs distance sensing (dual station mode) and communication simultaneously. And in three time slots of time slot 6, time slot 8 and time slot 10, adopting a semi-persistent (SEMIPERSISTENT) mode, and respectively transmitting nested sensing reference signals by the gNB through two first OFDM symbols. The pattern of nested perceptual reference signals is shown in fig. 4A.
The nested perceptual reference signal comprises two portsThe two are multiplexed by frequency division multiplexing (frequency division multiplexing, FDM), the parameters of each port include n= 6,Kmin＝2、K0＝2、k0 =0, μ=1,Tslot＝2,s0＝6,snum = 3. Where Tslot denotes a time domain period, which is expressed as the number of slots, s0 denotes the number of starting slots, and snum denotes the total number of occupied slots. Since μ=1, it can be seen from the figure that the subcarrier width of the first OFDM symbol is twice that of the communication OFDM symbol.
In slot 6, gNB allocates PRB2 to PRB3 to UE#1 (Single-User Multiple-Input Multiple-Output (SU-MIMO)) for communication, and PRB4 to PRB5 to UE#2 and UE#3 (Multi-User Multiple-Input Multiple-Output (MU-MIMO)) for communication. In slot 8, the gNB allocates PRB2 through PRB5 to UE#4 for communication.
In the DCI for scheduling PRB2 to PRB3 in slot 6, gNB informs UE#1 of the parameters μ1 =1,And a power ratio ρ1. Wherein, theAnd the number set of OFDM sub-carriers occupied by the nested sensing reference signals in the first OFDM symbol. Note that, in the above example,The number of the OFDM subcarrier included in (a) is a number with respect to a starting position (i.e., PRB 2) of a radio resource allocated to UE #1 for communication, it should be understood that,The number of the OFDM subcarrier included in the packet may be a number corresponding to CRB 0. Accordingly, ue#1 determines a rate matching pattern (e.g., RE positions including signals such as nested perceptual reference signals) in each first OFDM symbol of slot 6 and RE positions allocated to itself (ue#1) for communication according to the parameters notified by the gNB, for skipping the RE positions indicated by the rate matching pattern when receiving communication data, and receives the communication data (e.g., PDSCH data) in the first OFDM symbol according to the power ratio ρ1.
In the DCI for PRB4 to PRB5 in scheduling slot 6, gNB informs UE#2 of the parameters μ2 =1,And a power ratio ρ2. Accordingly, ue#2 determines a rate matching pattern (e.g., RE positions including signals such as nested perceptual reference signals) in each first OFDM symbol of slot 6 and RE positions allocated to itself (ue#2) for communication according to the parameters notified by the gNB, for skipping the RE positions indicated by the rate matching pattern when receiving communication data, and receives the communication data (e.g., PDSCH data) in the first OFDM symbol according to the power ratio ρ2.
In the DCI for PRB4 to PRB5 in scheduling slot 6, gNB informs UE#3 of the parameters μ3 =1,And a power ratio ρ3. Accordingly, ue#3 determines a rate matching pattern (e.g., RE positions including signals such as nested perceptual reference signals) in each first OFDM symbol of slot 6 and RE positions allocated to itself (ue#3) for communication according to the parameters notified by the gNB, for skipping the RE positions indicated by the rate matching pattern when receiving communication data, and receives the communication data (e.g., PDSCH data) in the first OFDM symbol according to the power ratio ρ3.
In the DCI for scheduling PRB2 to PRB5 in slot 8, gNB informs UE#4 that μ4 =1,And a power ratio ρ4. Or in DCI for scheduling PRB2 to PRB5 in slot 8, the gNB informs ue#4 of parameters μ4＝1、N＝6,Kmin＝2、K0 =2 (or K0'＝0)、k0 =0,And a power ratio ρ4. Accordingly, the ue#4 determines a rate matching pattern (e.g., RE positions including signals such as nested perceptual reference signals) in each first OFDM symbol of the slot 8 and RE positions allocated to itself (ue#4) for communication according to the parameters notified by the gNB, for skipping the RE positions indicated by the rate matching pattern when receiving communication data, and receives the communication data (e.g., PDSCH data) in the first OFDM symbol according to the power ratio ρ4.
In one possible embodiment, one gNB performs distance sensing (dual station mode) and communication simultaneously. In the three time slots of the time slot 6, the time slot 8 and the time slot 10, the gNB sends the mutual sensing reference signals through two first OFDM symbols respectively by adopting a semi-persistent (SEMIPERSISTENT) mode. The pattern of the mutually known reference signals is shown in fig. 4B.
The mutual sensing reference signal comprises two portsThe two are multiplexed by frequency division multiplexing (frequency division multiplexing, FDM), and the parameters of each port include p=2, q=3, kmin＝2、K0＝2、k0 =0, μ=1,Tslot＝2,s0＝6,snum = 3. Where Tslot denotes a time domain period, which is expressed as the number of slots, s0 denotes the number of starting slots, and snum denotes the total number of occupied slots. Since μ=1, it can be seen from the figure that the subcarrier width of the first OFDM symbol is twice that of the communication OFDM symbol.
In slot 6, gNB allocates PRB2 through PRB3 to UE#1 (SU-MIMO) for communication, and PRB4 through PRB5 to both UE#2 and UE#3 (MU-MIMO) for communication. In slot 8, the gNB allocates PRB2 through PRB5 to UE#4 for communication.
In the DCI for scheduling PRB2 to PRB3 in slot 6, gNB informs UE#1 of the parameters μ1 =1,And a power ratio ρ1. Accordingly, ue#1 determines a rate matching pattern (e.g., RE positions including signals such as mutual sensing reference signals) in each first OFDM symbol of slot 6 and RE positions allocated to itself (ue#1) for communication according to the parameters notified by the gNB, for skipping the RE positions indicated by the rate matching pattern when receiving communication data, and receives the communication data (e.g., PDSCH data) in the first OFDM symbol according to the power ratio ρ1.
In the DCI for PRB4 to PRB5 in scheduling slot 6, gNB informs UE#2 of the parameters μ2 =1,And a power ratio ρ2. Accordingly, ue#2 determines a rate matching pattern (e.g., RE positions including signals such as mutual sensing reference signals) in each first OFDM symbol of slot 6 and RE positions allocated to itself (ue#2) for communication according to the parameters notified by the gNB, for skipping the RE positions indicated by the rate matching pattern when receiving communication data, and receives the communication data (e.g., PDSCH data) in the first OFDM symbol according to the power ratio ρ2.
In the DCI for PRB4 to PRB5 in scheduling slot 6, gNB informs UE#3 of the parameters μ3 =1,And a power ratio ρ3. Accordingly, ue#3 determines a rate matching pattern (e.g., RE positions including signals such as mutual sensing reference signals) in each first OFDM symbol of slot 6 and RE positions allocated to itself (ue#3) for communication according to the parameters notified by the gNB, for skipping the RE positions indicated by the rate matching pattern when receiving communication data, and receives the communication data (e.g., PDSCH data) in the first OFDM symbol according to the power ratio ρ3.
In the DCI for scheduling PRB2 to PRB5 in slot 8, gNB informs UE#4 that μ4 =1,And a power ratio ρ4. Or in DCI for scheduling PRB2 to PRB5 in slot 8, the gNB informs ue#4 of parameters μ4＝1、P＝2,Q＝3,Kmin＝2、K0 =2 (or K0'＝0)、k0 =0,And a power ratio ρ4. Accordingly, the ue#4 determines a rate matching pattern (e.g., RE positions including signals such as mutual sensing reference signals) in each first OFDM symbol of the slot 8 and RE positions allocated to itself (ue#4) for communication according to the parameters notified by the gNB, for skipping the RE positions indicated by the rate matching pattern when receiving communication data, and receives the communication data (e.g., PDSCH data) in the first OFDM symbol according to the power ratio ρ4.
Fig. 5 is an exemplary flow diagram illustrating a communication method according to an embodiment of the present disclosure. As shown in fig. 5, an embodiment of the present disclosure is performed by a transmitter, the communication method including:
In step S5101, first information is transmitted.
In some embodiments, the first information is transmitted to a receiver. The first information is for a receiver to receive a communication signal in a first OFDM symbol.
In some embodiments, the first information is carried in at least one of:
DCI;
A MAC CE message;
An RRC message;
SCI。
Alternative implementations of step S5101 may refer to alternative implementations of step S3101 in fig. 3, and other relevant parts in the embodiment related to fig. 3, which are not described herein.
In some embodiments, this step is optional. For example, the transmitter and the receiver are located at the same device, the transmitter may not transmit the first information.
In step S5102, a first OFDM symbol is transmitted.
In some embodiments, the first OFDM symbol includes a perceptual reference signal and a communication signal.
In some embodiments, the first OFDM symbol includes a cyclic prefix, a perceptual reference signal, and a communication signal.
In some embodiments, the length of the first OFDM symbol (with cyclic prefix) is equal to the length of the second OFDM symbol (with cyclic prefix).
According to alternative implementations, in some embodiments, transmitting the first OFDM symbols may include transmitting L first OFDM symbols that are contiguous in the time domain, so the transmitter may transmit L first OFDM symbols that are contiguous in the time domain.
In some embodiments, the total length of the L first OFDM symbols (with cyclic prefix) is equal to the length of the second OFDM symbols (with cyclic prefix).
According to the above embodiment, the first OFDM symbol includes the sensing reference signal and the communication signal, that is, the first OFDM symbol may be used for sensing and communication at the same time, and resources other than the sensing reference signal in the first OFDM symbol may be used for transmitting communication data, so that the throughput of the communication link can be improved, and the spectral efficiency of the communication integrated system can be improved. Alternatively, the transmitter may transmit the first information to the receiver, so the receiver may implement reception of the communication signal in the first OFDM symbol according to the first information.
Fig. 6A is a flow diagram illustrating a communication method according to an embodiment of the present disclosure. As shown in fig. 6A, an embodiment of the present disclosure is performed by a receiver, the communication method comprising:
In step S6101, first information is received.
In some embodiments, the first information is for a receiver to receive a communication signal in a first OFDM symbol.
In some embodiments, the first information may be carried in at least one of:
DCI;
A MAC CE message;
An RRC message;
SCI。
Alternative implementations of step S6101 may refer to alternative implementations of step S3101 in fig. 3, and other relevant parts in the embodiment related to fig. 3, which are not described herein.
In some embodiments, this step is optional. For example, the transmitter and the receiver are located at the same device, the transmitter may not transmit the first information and the receiver may not receive the first information.
In step S6102, a communication signal in a first OFDM symbol is received.
According to an alternative implementation, in some embodiments, the receiver receives the first information, and the communication signal in the first OFDM symbol may then be received in accordance with the first information.
According to alternative implementations, in some embodiments, receiving the communication signal in the first OFDM symbol may include receiving the communication signal in L first OFDM symbols that are contiguous in the time domain, such that the receiver may continuously receive the communication signal in each of the L first OFDM symbols in the time domain.
According to the above embodiment, the first OFDM symbol includes the sensing reference signal and the communication signal, that is, the first OFDM symbol may be used for sensing and communication at the same time, and resources other than the sensing reference signal in the first OFDM symbol may be used for transmitting communication data, so that the throughput of the communication link can be improved, and the spectral efficiency of the communication integrated system can be improved. Alternatively, the receiver may receive the first information sent by the transmitter, and implement reception of the communication signal in the first OFDM symbol according to the first information.
Fig. 6B is a flow chart diagram of a communication method shown in accordance with an embodiment of the present disclosure. As shown in fig. 6B, an embodiment of the present disclosure is performed by a receiver, the communication method comprising:
In step S6201, a first OFDM symbol is received.
According to alternative implementations, in some embodiments, receiving the first OFDM symbols may include receiving L first OFDM symbols, the L first OFDM symbols being contiguous in the time domain, so the receiver may receive the L first OFDM symbols contiguous in the time domain.
According to an alternative implementation, in some embodiments, the receiver comprises a perceptual receiver, which may receive the perceptual reference signal in the first OFDM symbol. According to an alternative implementation, in some embodiments, the receiver comprises a communication receiver, which may receive the communication signal in the first OFDM symbol.
According to the above embodiments, the first OFDM symbol may be used for both sensing and communication.
Embodiments of the present disclosure also provide an apparatus for implementing any of the above methods, for example, an apparatus that includes a unit or module for implementing each step performed by the transmitter in any of the above methods. For another example, another apparatus is provided that includes means or modules for performing the steps performed by the receiver in any of the methods above.
It should be understood that the division of each unit or module in the above apparatus is merely a division of a logic function, and may be fully or partially integrated into one physical entity or may be physically separated when actually implemented. Furthermore, the units or modules in the device may be implemented in the form of processor-invoked software, e.g. the device comprises a processor, which is connected to a memory, in which instructions are stored, the processor invoking the instructions stored in the memory for implementing any of the above methods or for implementing the functions of the units or modules of the device, wherein the processor is e.g. a general purpose processor, such as a central processing unit (Central Processing Unit, CPU) or a microprocessor, and the memory is a memory within the device or a memory outside the device. Or the units or modules in the apparatus may be implemented in the form of hardware circuits, where the functions of some or all of the units or modules may be implemented by a design of a hardware circuit, where the hardware circuit may be understood as one or more processors, for example, in one implementation, the hardware circuit is an application-specific integrated circuit (ASIC), the functions of some or all of the units or modules may be implemented by a design of logic relationships between elements within the circuit, and in another implementation, the hardware circuit may be implemented by a programmable logic device (programmable logic device, PLD), where a field programmable gate array (Field Programmable GATE ARRAY, FPGA) may include a number of logic gates, where the connection relationships between the logic gates are configured by a configuration file, so as to implement the functions of some or all of the units or modules. All units or modules of the above device may be realized in the form of invoking software by a processor, or in the form of hardware circuits, or in part in the form of invoking software by a processor, and in the rest in the form of hardware circuits.
In the embodiments of the present disclosure, the processor is a circuit having a signal processing capability, and in one implementation, the processor may be a circuit having an instruction reading and running capability, such as a central processing unit (Central Processing Unit, CPU), a microprocessor, a graphics processor (graphics processing unit, GPU) (which may be understood as a microprocessor), or a digital signal processor (DIGITAL SIGNAL processor, DSP), etc., and in another implementation, the processor may implement a function through a logic relationship of a hardware circuit, where the logic relationship of the hardware circuit is fixed or reconfigurable, for example, the processor is a hardware circuit implemented by an application-specific integrated circuit (ASIC) or a programmable logic device (programmable logic device, PLD), for example, FPGA. In the reconfigurable hardware circuit, the processor loads the configuration document, and the process of implementing the configuration of the hardware circuit may be understood as a process of loading instructions by the processor to implement the functions of some or all of the above units or modules. Furthermore, a hardware circuit designed for artificial intelligence may be also be considered as an ASIC, such as a neural network Processing Unit (Neural Network Processing Unit, NPU), tensor Processing Unit (Tensor Processing Unit, TPU), deep learning Processing Unit (DEEP LEARNING Processing Unit, DPU), and the like.
Fig. 7A is a schematic structural diagram of a transmitter according to an embodiment of the present disclosure. As shown in fig. 7A, the transmitter 7100 may include at least one of a transceiver module 7101, a processing module 7102, and the like. In some embodiments, the transceiver module is configured to transmit a first OFDM symbol. Optionally, the transceiver module is configured to perform at least one of the communication steps (e.g., step S3101, step S3102, but not limited thereto) such as transmission and/or reception performed by the transmitter in any of the above methods, which is not described herein. Optionally, the processing module is configured to perform at least one of the other steps performed by the transmitter in any of the above methods, which is not described herein.
Fig. 7B is a schematic structural diagram of a receiver according to an embodiment of the present disclosure. As shown in fig. 7B, the receiver 7200 may include at least one of a transceiver module 7201, a processing module 7202, and the like. In some embodiments, the transceiver module is configured to receive a first OFDM symbol. Optionally, the transceiver module is configured to perform at least one of the communication steps (e.g., step S3103, but not limited thereto) such as transmission and/or reception performed by the receiver in any of the above methods, which is not described herein. Optionally, the processing module is configured to perform at least one of the other steps performed by the receiver in any of the above methods, which is not described herein.
In some embodiments, the transceiver module may include a transmitting module and/or a receiving module, which may be separate or integrated. Alternatively, the transceiver module may be interchangeable with a transceiver.
In some embodiments, the processing module may be a single module or may include multiple sub-modules. Optionally, the plurality of sub-modules perform all or part of the steps required to be performed by the processing module, respectively. Alternatively, the processing module may be interchanged with the processor.
Fig. 8A is a schematic structural diagram of a communication device 8100 according to an embodiment of the present disclosure. The communication device 8100 may be a network device (e.g., an access network device or the like), a terminal (e.g., a user device or the like), a chip system, a processor or the like that supports the network device to implement any of the above methods, or a chip, a chip system, a processor or the like that supports the terminal to implement any of the above methods. The communication device 8100 may be used to implement the method applied to the transmitter in the above method embodiment or the method applied to the receiver, and in particular, reference may be made to the description in the above method embodiment.
As shown in fig. 8A, communication device 8100 includes one or more processors 8101. The processor 8101 may be a general-purpose processor or a special-purpose processor, etc., and may be, for example, a baseband processor or a central processing unit. The baseband processor may be used to process communication protocols and communication data, and the central processor may be used to control communication devices (e.g., base stations, baseband chips, terminal devices, terminal device chips, DUs or CUs, etc.), execute programs, and process data for the programs. The communication device 8100 is configured to perform any of the above methods.
In some embodiments, communication device 8100 also includes one or more memory 8102 for storing instructions. Alternatively, all or part of memory 8102 may be external to communication device 8100.
In some embodiments, communication device 8100 also includes one or more transceivers 8103. When the communication device 8100 includes one or more transceivers 8103, the transceiver 8103 performs at least one of the communication steps (e.g., step S3101, step S3102, step S3103, but not limited thereto) of transmission and/or reception in the above-described method, and the processor 8101 performs at least one of the other steps.
In some embodiments, the transceiver may include a receiver and/or a transmitter, which may be separate or integrated. Alternatively, terms such as transceiver, transceiver unit, transceiver circuit, etc. may be replaced with each other, terms such as transmitter, transmitter circuit, etc. may be replaced with each other, and terms such as receiver, receiving unit, receiver, receiving circuit, etc. may be replaced with each other.
In some embodiments, communication device 8100 may include one or more interface circuits. Optionally, an interface circuit is coupled to the memory 8102, the interface circuit being operable to receive signals from the memory 8102 or other device, and operable to transmit signals to the memory 8102 or other device. For example, the interface circuit may read instructions stored in the memory 8102 and send the instructions to the processor 8101.
The communication device 8100 in the above embodiment description may be a network device or a terminal, but the scope of the communication device 8100 described in the present disclosure is not limited thereto, and the structure of the communication device 8100 may not be limited by fig. 8A. The communication device may be a stand-alone device or may be part of a larger device. For example, the communication device may be 1) a stand-alone integrated circuit IC, or chip, or a system or subsystem of chips, (2) a set of one or more ICs, optionally including storage means for storing data, programs, (3) an ASIC, such as a Modem, (4) a module that may be embedded in other devices, (5) a receiver, terminal device, smart terminal device, cellular telephone, wireless device, handset, mobile unit, vehicle-mounted device, network device, cloud device, artificial smart device, etc., (6) others, etc.
Fig. 8B is a schematic structural diagram of a chip 8200 according to an embodiment of the disclosure. For the case where the communication device 8100 may be a chip or a chip system, reference may be made to a schematic structural diagram of the chip 8200 shown in fig. 8B, but is not limited thereto.
The chip 8200 includes one or more processors 8201, the chip 8200 being configured to perform any of the above methods.
In some embodiments, the chip 8200 further comprises one or more interface circuits 8202. Optionally, an interface circuit 8202 is coupled to the memory 8203, the interface circuit 8202 may be configured to receive signals from the memory 8203 or other device, and the interface circuit 8202 may be configured to transmit signals to the memory 8203 or other device. For example, the interface circuit 8202 may read instructions stored in the memory 8203 and send the instructions to the processor 8201.
In some embodiments, the interface circuit 8202 performs at least one of the communication steps (e.g., but not limited to, step S3101, step S3102, step S3103) of the above-described methods, and the processor 8201 performs at least one of the other steps.
In some embodiments, the terms interface circuit, interface, transceiver pin, transceiver, etc. may be interchanged.
In some embodiments, chip 8200 further includes one or more memories 8203 for storing instructions. Alternatively, all or part of the memory 8203 may be external to the chip 8200.
The present disclosure also proposes a storage medium having stored thereon instructions that, when executed on a communication device 8100, cause the communication device 8100 to perform any of the above methods. Optionally, the storage medium is an electronic storage medium. Alternatively, the storage medium described above is a computer-readable storage medium, but is not limited thereto, and it may be a storage medium readable by other devices. Alternatively, the above-described storage medium may be a non-transitory (non-transitory) storage medium, but is not limited thereto, and it may also be a transitory storage medium.
The present disclosure also proposes a program product which, when executed by a communication device 8100, causes the communication device 8100 to perform any of the above methods. Optionally, the above-described program product is a computer program product.
The present disclosure also proposes a computer program which, when run on a computer, causes the computer to perform any of the above methods.