CN101330306A - Method for transmitting rank indication information - Google Patents
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- CN101330306A CN101330306ACNA2008101320849ACN200810132084ACN101330306ACN 101330306 ACN101330306 ACN 101330306ACN A2008101320849 ACNA2008101320849 ACN A2008101320849ACN 200810132084 ACN200810132084 ACN 200810132084ACN 101330306 ACN101330306 ACN 101330306A
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Abstract
Description
Technical field
The present invention relates to the communications field, relate in particular to a kind of sending method of rank indication information.
Background technology
Multiple-input and multiple-output (Multiple-Input Multiple-Out-put, abbreviate MIMO as) technology be the third generation (3G) and the 4th generation (4G) mobile communication system key technology, it can increase power system capacity, improve transmission performance, and can merge mutually with other physical-layer techniques well, but, when channel relevancy was strong, the diversity gain and the spatial multiplexing gain that are brought by multipath channel can reduce greatly, cause declining to a great extent of mimo system performance.At present, a kind of new MIMO method for precoding has been proposed, this method is a kind of multiplex mode of MIMO efficiently, precoding processing by the sending and receiving end is divided into a plurality of independently pseudo channels with mimo channel, effectively eliminated the influence of channel relevancy, so precoding technique has guaranteed the stability of mimo system under various environment.
Long Term Evolution (Long Term Evolution, abbreviating LTE as) system is the essential planning of third generation partnership, the realization of precoding technique in LTE is by at subscriber equipment (User Equipment, abbreviate UE as) and base station (eNodeB) code book (set of pre-coding matrix) is set, UE according to certain criterion (for example, throughput-maximized or near the right singular matrix of channel matrix) from code book, select best pre-coding matrix, and with pre-coding matrix index (Precoding Matrix Index, abbreviate PMI as) feed back to eNodeB, eNodeB seeks corresponding pre-coding matrix according to the PMI that receives in code book, in downlink, use this pre-coding matrix and carry out the precoding transmission, in addition, also need in up channel, feed back order indication (RI) information, this RI information representation the maximum symbol quantity that can transmit on subcarrier.
Fig. 1 shows the structural representation of basic frame structure in the LTE system, as shown in Figure 1, frame structure is divided into radio frames, field, subframe, time slot and four grades of symbol, and wherein, the length of a radio frames is 10ms, a radio frames is made up of two fields, the length of each field is 5ms, and a field is made up of 5 subframes, and the length of each subframe is 1ms, a subframe is made of two time slots, and the length of each time slot is 0.5ms.
When the LTE system adopts the regular circulation prefix, time slot comprise 7 length be 66.7us on/descending symbol, wherein, the circulating prefix-length of first symbol is 5.21us, the circulating prefix-length of other 6 symbols is 4.69us.
When the LTE system adopts extended cyclic prefix, time slot comprise 6 length be 66.7us on/descending symbol, wherein, the circulating prefix-length of each symbol is 16.67us.
A Resource Unit (Resource Element, abbreviate RE as) be an OFDM (Orthogonal frequency Division Multiplexing, abbreviate OFDM as) a subcarrier in the symbol, and a downlink resource piece (Resource Block, abbreviate RB as) constitute by continuous 12 subcarriers and continuous 7 OFDM symbols (being 6 OFDM symbols during long CP), on frequency domain 180kHz, on the time domain a general time slots length, Fig. 2 shows that bandwidth is the structural representation of the Resource Block of 5MHz in the LTE system, as shown in Figure 2, when carrying out resource allocation, be that base unit distributes with the Resource Block.
When the targeted customer feeds back RI information, if this targeted customer does not need to send data, then RI information is gone control channel (Physical Uplink Control Channel physically, abbreviate PUCCH as) middle transmission, if this targeted customer need send data, then transmission in the capable physically shared channel (Physical Uplink Shared Channel abbreviates PUSCH as) of RI information.
The form of PUCCH is divided intoformat 1, format 1a, format 1b andformat 2, format 2a, six kinds of format 2b, wherein,format 1 is used to transmit dispatch request (the Scheduling Request of 1 bit, abbreviate SR as) information, expression has or does not have SR, format 1a is used to transmit ACK/NACK (Acknowledgement/Negative Acknowledgement) information of the single codeword stream of 1 bit, format 1b is used to transmit the ACK/NACK information of two streams of code words of 2 bits, wherein, the ACK/NACK information of corresponding 1 bit of each streams of code words,format 2 is used for transmission channel quality indication (Channel Quality Indicator, abbreviate CQI as)/PMI and RI information, format 2a is used to transmit CQI/PMI and RI information, single codeword stream ACK/NACK information, format2b is used to transmit CQI/PMI and RI information, two streams of code words ACK/NACK information, format2a and format 2b are used for the scene that Cyclic Prefix is the regular circulation prefix; Fig. 3 shows the frequency domain position schematic diagram of Physical Uplink Control Channel in the LTE system, as shown in Figure 3, and the resource of two Resource Block of each PUCCH channel occupancy; The RI message length is 1 bit or 2 bits, and, when RI information and CQI/PMI information send, only send RI information in same subframe.
Channel architecture to PUCCHformat 2 describes below:
When Fig. 4 shows system's employing regular circulation prefix, be used to transmit the schematic diagram of the PUCCH channel of RI information, as shown in Figure 4, in the regular circulation prefix, selecting length is that 12 CAZAC sequence is as basic sequence, just this CAZAC sequence repeats 7 times, all shine upon a CAZAC sequence on 12 frequency domain positions on each symbol of a Resource Block, wherein,time slot # 0, #2, #3, #4, sequence on the symbol of #6 is used for the transfer of data on the PUCCH channel,time slot # 1, sequence on the symbol of #5 is used for the transmission of reference signal on the PUCCH channel (Reference Signal abbreviates RS as).
When Fig. 5 shows system's employing extended cyclic prefix, be used to transmit the schematic diagram of the PUCCH channel of RI information, as shown in Figure 5, in extended cyclic prefix, selecting length is that 12 CAZAC sequence is as basic sequence, and with thisCAZAC sequence repetition 6 times, all shine upon a CAZAC sequence on 12 frequency domain positions on each symbol of a Resource Block, wherein, sequence on the symbol oftime slot # 0, #1, #3, #4, #5 is used for the transfer of data on the PUCCH channel, and the sequence on the symbol oftime slot # 2 is used for the reference signal transmission on the PUCCH channel.
The bit number of coding back CQI/PMI and RI information is 20, bit number behind the coding is carried out Quadrature Phase Shift Keying (QPSK) modulation, be modulated to 10 QPSK modulation symbols, 5 QPSK modulation symbols of mapping on each time slot, and make each modulation symbol corresponding with the data sequence of a PUCCH channel, this modulation symbol and target data sequence are multiplied each other, be mapped on the corresponding carrier wave and send.
The channel architecture of PUCCH format 2a is on the basis ofPUCCH format 2, after the ACK/NACK information of 1 bit carried out BPSK modulation, multiply each other with second reference signal sequence of each time slot in the PUCCH format2 structure, and the result after will multiplying each other is mapped on the corresponding carrier wave and sends.
The channel architecture of PUCCH format 2b is on the basis ofPUCCH format 2, after the ACK/NACK information of 2 bits carried out QPSK modulation, multiply each other with second reference signal sequence of each time slot in the PUCCH format2 structure, and the result after will multiplying each other is mapped on the corresponding carrier wave and sends;
In the LTE system, the SC-FDMA mode is adopted in the transmission of upstream data, this just requires ascending resource to carry out Continuous Mappings, and, on each symbol all send data after modulation, being DFT handles, and be mapped on the frequency domain position, if there is two or more PUCCH form in same subframe, to send, can cause intersymbol interference, can not guarantee the orthogonality of PUCCH interchannel sign indicating number, cause systematic function to descend, and at present for RI information, SR information and the sending method of ACK/NACK information in same subframe, prior art does not provide concrete scheme.
Summary of the invention
Consider that a kind of technology of the needs that exist in the correlation technique solves and how RI information, ACK/NACK information and SR information are carried out the transmission problem and proposed the present invention in same subframe, for this reason, main purpose of the present invention is to provide a kind of sending method and device of rank indication information, to address the above problem.
A kind of sending method of rank indication information is provided according to an aspect of the present invention.
Sending method according to the rank indication information of the embodiment of the invention comprises: when rank indication information, feedback information, dispatch request information send in same subframe, rank indication information, feedback information and dispatch request information are carried out combined coding, and it is one of following to adopt information afterPUCCH format 2 forms send combined coding, above-mentioned feedback information to comprise: correctly replying is that ACK information, wrong responses are nack message.
Wherein, rank indication information, feedback information and dispatch request information being carried out combined coding specifically comprises: carry out combined coding according to rank indication information, feedback information, dispatch request sequence of information; Perhaps, carry out combined coding according to the order of rank indication information, dispatch request information, feedback information, the information behind this combined coding is 20 bits.
A kind of sending method of rank indication information is provided according to an aspect of the present invention.
Sending method according to the rank indication information of the embodiment of the invention comprises: when rank indication information, feedback information, dispatch request information send in same subframe, if subframe adopts the regular circulation prefix, then with rank indication information and dispatch request information combined coding, and adopt information after PUCCH format 2a form or PUCCH format 2b form send combined coding; If subframe adopts extended cyclic prefix, rank indication information, feedback information and dispatch request information are carried out combined coding, and adopt the information afterPUCCH format 2 forms send combined coding.
Wherein, rank indication information and dispatch request information are carried out combined coding specifically comprise: according to rank indication information formerly, dispatch request information after order carry out combined coding, the information behind this combined coding is 20 bits.
Preferably, rank indication information, feedback information and dispatch request information being carried out combined coding specifically comprises: carry out combined coding according to rank indication information, feedback information, dispatch request sequence of information; Perhaps, carry out combined coding according to the order of rank indication information, dispatch request information, feedback information, the information behind this combined coding is 20 bits.
A kind of sending method of rank indication information is provided according to an aspect of the present invention.
Sending method according to the rank indication information of the embodiment of the invention comprises: when rank indication information, feedback information, dispatch request information send in same subframe, use the PUCCH Channel Transmission feedback information of transmitting and scheduling solicited message, do not send rank indication information.
A kind of sending method of rank indication information is provided according to an aspect of the present invention.
Sending method according to the rank indication information of the embodiment of the invention comprises: when rank indication information, feedback information, dispatch request information send in same subframe, use PUSCH Channel Transmission rank indication information, feedback information, dispatch request information.
By above-mentioned at least one technical scheme of the present invention, solved RI information, SR information and the ACK/NACK information caused problem that the orthogonality of PUCCH interchannel sign indicating number is destroyed when same subframe sends, guaranteed the overall performance of system.
Description of drawings
Accompanying drawing is used to provide further understanding of the present invention, and constitutes the part of specification, is used from explanation the present invention with embodiments of the invention one, is not construed as limiting the invention.In the accompanying drawings:
Fig. 1 is the structural representation according to basic frame structure in the correlation technique LTE system;
Fig. 2 is to be the schematic diagram of the Resource Block of 5MHz according to bandwidth in the LTE system of correlation technique;
Fig. 3 is the frequency domain position schematic diagram according to Physical Uplink Control Channel in the LTE system of correlation technique;
Fig. 4 is when adopting the regular circulation prefix according to the system of correlation technique, is used to transmit the schematic diagram of the PUCCH channel of RI information;
Fig. 5 is when adopting extended cyclic prefix according to the system of correlation technique, is used to transmit the schematic diagram of the PUCCH channel of RI information;
Fig. 6 is the flow chart according to the sending method of the rank indication information of the inventive method embodiment;
Fig. 7 is the flow chart according to the sending method of the rank indication information of the inventive method embodiment.
Embodiment
Describe the present invention in detail below in conjunction with accompanying drawing.
Method embodiment
According to the embodiment of the invention, provide a kind of sending method of rank indication information.
Fig. 6 is the flow chart according to the sending method of the rank indication information of the embodiment of the invention, and as shown in Figure 6, this method may further comprise the steps:
Step S602, when order indication (RI) information, feedback information, when dispatch request (SR) information sends in same subframe, RI information, feedback information and SR information are carried out combined coding, and wherein, it is one of following that above-mentioned feedback information comprises: ACK information, nack message;
Step S604 adopts the information after PUCCHformat 2 forms send combined coding, and the information behind this combined coding is 20 bits.
By the technical scheme that the embodiment of the invention provides, solved RI information, SR information and the ACK/NACK information caused problem that the orthogonality of PUCCH interchannel sign indicating number is destroyed when same subframe sends, guaranteed the overall performance of system.
Wherein, in step S602, RI information, feedback information and SR information are carried out combined coding specifically to be comprised: can carry out combined coding according to RI information, feedback information, SR sequence of information, also can carry out combined coding according to the order of RI information, SR information, feedback information.
Fig. 7 is the flow chart according to the sending method of the rank indication information of the embodiment of the invention, and as shown in Figure 7, this method may further comprise the steps:
Step S702, when RI information, feedback information, SR information are in same subframe, if subframe adopts the regular circulation prefix, then with RI information and SR information combined coding, can according to RI information formerly, SR information after order carry out combined coding, and the information behind employing PUCCH format 2a form or the PUCCH format 2b form transmission combined coding, the information behind this combined coding is 20 bits;
Step S704 if subframe adopts extended cyclic prefix, carries out combined coding with RI information, feedback information and SR information, wherein, can carry out combined coding according to RI information, feedback information, SR sequence of information; Perhaps carry out combined coding according to the order of RI information, SR information, feedback information, and adopt the information afterPUCCH format 2 forms send combined coding, the information behind this combined coding is 20 bits.
By the technical scheme that the embodiment of the invention provides, solved RI information, SR information and the ACK/NACK information caused problem that the orthogonality of PUCCH interchannel sign indicating number is destroyed when same subframe sends, guaranteed the overall performance of system.
Fig. 2 shows the structural representation of Resource Block that bandwidth is the 3GPP LTE system of 5M, as shown in Figure 2, this system comprises 512 subcarriers altogether, wherein, available subcarrier is middle 300, each Resource Block comprises 12 continuous sub-carriers, and then the 3GPP LTE system of 5M bandwidth comprises 25 Resource Block altogether, if the quantity of up available resource block is NRBUL, all Resource Block are numbered 0,1,2 from low to high according to the frequency domain order ..., NRBUL-1, NPRBThe expression Resource Block index, then be numbered m the PUCCH channel frequency domain position as shown in Figure 3, be that the 3GPP LTE system of 5M is an example below with the bandwidth, the embodiment of the invention is elaborated.
Example one
For the targeted customer, when rank indication information, feedback information, SR information send in same subframe, divide following situation that the embodiment of the invention is described below:
Situation one: the targeted customer does not have the SR informational needs to send, and when adopting the subframe structure of regular circulation prefix, uses PUCCH format 2a or PUCCH format 2b to send RI information and ACK/NACK information; When adopting the subframe structure of extended cyclic prefix, can at first RI information and ACK/NACK information be carried out combined coding, obtain the result behind the combined coding, and use the result afterPUCCH format 2 sends these combined codings.
Situation two: the targeted customer has the SR informational needs to send, at this moment, RI information, ACK/NACK information and SR information at first can be carried out combined coding, obtain the result behind the combined coding, and usePUCCH format 2 to send the result behind the combined coding, and wherein, can be according to first RI information, ACK/NACK information again, last SR sequence of information is carried out combined coding to the three.
According to the embodiment of the invention, a kind of sending method of rank indication information is provided, in this embodiment, when RI information, feedback information, SR information are in same subframe, use the PUCCH Channel Transmission feedback information of transmission SR information, do not send RI information.
By the technical scheme that the embodiment of the invention provides, solved RI information, SR information and the ACK/NACK information caused problem that the orthogonality of PUCCH interchannel sign indicating number is destroyed when same subframe sends, guaranteed the overall performance of system.
Example two
Be that the 3GPP LTE system of 5M is that example describes still below with the bandwidth in the example one, for the targeted customer, when the PUCCH channel of transmission RI information sends in same subframe with transmission SR information PUCCH channel, in two kinds of situation the embodiment of the invention is described below:
Situation one: the targeted customer does not have the SR informational needs to send, and at first RI information and ACK/NACK information is carried out combined coding, obtains the result behind the combined coding, and uses the result afterPUCCH format 2 sends these combined codings;
Situation two: the targeted customer has the SR informational needs to send, and at this moment, it is the PUCCH Channel Transmission ACK/NACK information that is used to transmit SR information of its distribution that the targeted customer can use the base station, and does not send RI information.
According to the embodiment of the invention, a kind of sending method of rank indication information is provided, in this embodiment, when RI information, feedback information, SR information are in same subframe, use PUSCH Channel Transmission RI information, feedback information, SR information.
Example three
Be that the 3GPP LTE system of 5M is that example describes still below with the bandwidth in the example one, for the targeted customer, when the PUCCH channel of transmission RI information sends in same subframe with transmission SR information PUCCH channel, in two kinds of situation the embodiment of the invention is described below:
Situation one: in tdd systems, the targeted customer does not have the SR informational needs to send, when RI information and ACK/NACK information send in same subframe, when adopting the subframe structure of regular circulation prefix, all ACK/NACK information are encoded, coded bit quantity is 20, carry out the QPSK modulation, use the information afterformat 2 sends modulation, to modulate back RI information and (carry out the BPSK modulation when RI information is 1 bit, carry out QPSK modulation when RI information is 2 bits) multiply each other with second reference signal sequence of each time slot, then with the PUCCH channel Mapping on the time-frequency resource, send;
Situation two: the targeted customer has the SR informational needs to send, and at this moment, can use the base station is PUSCH channel while transferring ACK/nack message, SR information and the RI information of its distribution.
As mentioned above, sending method and/or device by means of rank indication information provided by the invention, solve RI information, SR information and the ACK/NACK information caused problem that the orthogonality of PUCCH interchannel sign indicating number is destroyed when same subframe sends, guaranteed the overall performance of system.
The above is the preferred embodiments of the present invention only, is not limited to the present invention, and for a person skilled in the art, the present invention can have various changes and variation.Within the spirit and principles in the present invention all, any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (11)
1. the sending method of a rank indication information is characterized in that, comprising:
When rank indication information, feedback information, dispatch request are SR information when sending in same subframe, rank indication information, feedback information and dispatch request information are carried out combined coding, and adopt the information after PUCCH format 2 forms send combined coding.
2. method according to claim 1 is characterized in that, describedly rank indication information, feedback information and dispatch request information are carried out combined coding specifically comprises:
Carry out combined coding according to rank indication information, described feedback information, described dispatch request sequence of information; Perhaps
Order according to rank indication information, described dispatch request information, described feedback information is carried out combined coding.
3. method according to claim 1 and 2 is characterized in that, the information behind the described combined coding is 20 bits.
4. method according to claim 1 and 2 is characterized in that, it is one of following that described feedback information comprises: correctly replying is that ACK information, wrong responses are nack message.
5. the sending method of a rank indication information is characterized in that, comprising:
When rank indication information, feedback information, dispatch request information send in same subframe, if described subframe adopts the regular circulation prefix, then with rank indication information and dispatch request information combined coding, and adopt information after PUCCH format 2a form or PUCCH format 2b form send combined coding;
If described subframe adopts extended cyclic prefix, rank indication information, feedback information and dispatch request information are carried out combined coding, and adopt the information after PUCCH format 2 forms send combined coding.
6. method according to claim 5 is characterized in that, describedly rank indication information and dispatch request information are carried out combined coding specifically comprises:
According to rank indication information formerly, dispatch request information after order carry out combined coding.
7. according to claim 5 or 6 described methods, it is characterized in that the information behind the described combined coding is 20 bits.
8. method according to claim 5 is characterized in that, describedly rank indication information, feedback information and dispatch request information are carried out combined coding specifically comprises:
Carry out combined coding according to rank indication information, described feedback information, described dispatch request sequence of information; Perhaps
Order according to rank indication information, described dispatch request information, described feedback information is carried out combined coding.
9. according to claim 5 or 8 described methods, it is characterized in that the information behind the described combined coding is 20 bits.
10. the sending method of a rank indication information is characterized in that, comprising:
When rank indication information, feedback information, dispatch request information sent in same subframe, using the Physical Uplink Control Channel of the described dispatch request information of transmission was the described feedback information of PUCCH Channel Transmission, does not send described rank indication information.
11. the sending method of a rank indication information is characterized in that, comprising:
When rank indication information, feedback information, dispatch request information sent in same subframe, using Physical Uplink Shared Channel was the described rank indication information of PUSCH Channel Transmission, described feedback information, described dispatch request information.
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| WO2010009651A1 (en)* | 2008-07-24 | 2010-01-28 | 中兴通讯股份有限公司 | Method and apparatus for sending rank indicator information, receiving method and apparatus thereof |
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