Present patent application is to submit Patent Office of the People's Republic of China on February 11st, 2010, and application number is 201010111748.0, and denomination of invention is the divisional application of the Chinese patent application of " SRS signaling method and triggering method thereof and equipment ".
Embodiment
Below in conjunction with the accompanying drawing in the present invention, the technical scheme in the present invention is carried out to clear, complete description, obviously, described embodiment is a part of embodiment of the present invention, instead of whole embodiment.Based on the embodiment in the present invention, the every other embodiment that those of ordinary skill in the art obtain under the prerequisite of not making creative work, belongs to the scope of protection of the invention.
Embodiment mono-
The present embodiment is in order to alleviate the limited situation of SRS resource capacity, and uplink SRS signal sends can adopt mode aperiodic, sends a triggering signal by base station and makes UE can carry out the transmission of SRS signal.In addition, can adopt a control signal of transmission to indicate multiple UE to carry out the transmission of SRS signal.
The flow process that the base station triggers SRS signal that Fig. 1 shows the present embodiment to be provided sends and subscriber equipment are triggered and send the flow process of SRS signal, wherein, SRS configuration parameter can be by high-level signaling configured in advance to subscriber equipment, and configuration parameter can comprise the corresponding information such as burst, band information.This flow process can comprise:
Step 101, definite subscriber equipment that need to send SRS signal.
In this step, can be by high level according to the business demand of each subscriber equipment or data-transmission mode, determine that or which subscriber equipment need to send SRS signal, and determine the mark of these subscriber equipmenies.The subscriber equipment that need to send SRS signal of determining can be multiple (as one groups).
Step 102, base station send PDCCH signaling, wherein carry and the corresponding mark of this group subscriber equipment, one group of being determined by step 101 of this mark correspondence need to send the subscriber equipment of SRS signal, and to organizing the each subscriber equipment in subscriber equipment, all be provided with a SRS signal and send sign, and represent whether to require subscriber equipment to send SRS signal by different SRS signal transmission sign values.
SRS signal transmission sign entrained in PDCCH signaling can be the mark of 1 bit length, to reduce the expense of PDCCH signaling.If adopt the mark of 1 bit length, can definition value be that 0 expression requires subscriber equipment to send SRS signal, value is that 1 expression does not require that subscriber equipment sends SRS signal, vice versa.
So far, completed by a PDCCH signaling and indicated multiple subscriber equipmenies (as one group of subscriber equipment) to send the flow process of SRS signal.
Consider that it is to adopt blind check mode that subscriber equipment receives PDCCH signaling, be that subscriber equipment is not generally known current DCI(Downlink Control Information) what transmit is the information of what format, does not also know the information oneself needing is in which position.But subscriber equipment knows and own currently expecting what information, for example currently may expect that SRS sends indication information.For different corresponding X-RNTI(radio network temporary identifiers for expectation information user equipment) go the Element with CCE(Control Channel, the elementary cell of carrying DCI).Information is done CRC check, if CRC check success, subscriber equipment just knows that this information is oneself needs so, also knows corresponding DCIformat, thereby further solves DCI content.Therefore, in the present embodiment, base station can be used No. ID as PDCCH signaling of SRS-RNTI, sends SRS, thereby improve the blind check efficiency of subscriber equipment to PDCCH to indicate this PDCCH signaling of one group of subscriber equipment to be used to indicate subscriber equipment.Wherein, SRS-RNTI can corresponding one group of subscriber equipment.
The space of considering PDCCH can be divided into public search space and specific search volume, to improve the blind check efficiency of subscriber equipment.In the present embodiment, base station is used public search space to send this and is used to indicate subscriber equipment and sends the PDCCH signaling of SRS, so that subscriber equipment detects this PDCCH signaling at public search space, to reduce the complexity of user's blind check.
Further, in order to reduce blind check number of times, in the present embodiment, this can be constructed and be used to indicate subscriber equipment and send according to the length of existing PDCCH signaling the PDCCH signaling of SRS signal in base station.
A kind of typical PDCCH DCI format sample is as follows:
The effective information position of supposing this DCI is 20bit, can support 20 users, 20 users' index(user ID) for one in sequence number 1-20, information bit corresponding to each sequence number can be 1 or 0,1 represents that this user is triggered sends SRS signal, and 0 representative does not trigger this user and sends SRS signal.UE is in the time sending this DCI information, can first carry out CRC check to this DCI information, check information and SRS-RNTI carry out XOR and generate new check digit, and effective information position and check digit constitute jointly the last information bit of this DCI, are carrying out chnnel coding, data-mapping transmission.
The PDCCH signaling that subscriber equipment sends according to base station, triggers SRS signal transmission flow, comprising:
Step 103, subscriber equipment are monitored PDCCH at predetermined instant, if read the SRS network identifier corresponding to this user, understand PDCCH signaling.
In this step, corresponding above-mentioned base station sends the mode of PDCCH signaling, and subscriber equipment is in the time of blind check PDCCH, and whether having signaling ID in the detection of common search region is the PDCCH signaling of SRS-RNTI, if had, performs step 104.
In the present embodiment, be in the one group of subscriber equipment that SRS-RNTI was identified in PDCCH signaling one taking this subscriber equipment and be described as example.
Step 104, subscriber equipment are resolved the PDCCH signaling receiving, and read the SRS sign corresponding with this customer equipment identification wherein carrying.
If the value of this SRS sign of step 105 shows to need subscriber equipment to send SRS signal, perform step 106, otherwise execution step 107.
Step 106, subscriber equipment send SRS signal according to the pre-configured SRS configuration parameter to this subscriber equipment.
Step 107, subscriber equipment are not carried out SRS signal and are sent.
In above-mentioned flow process, subscriber equipment can send SRS signal by it sends the reserved resource of SRS signal according to system.In order to reduce the conflict between resource, base station can be according to each user's the situation such as service conditions and transmission mode, carry out user grouping, and carry out resource distribution, then notify each subscriber equipment with high-level signaling, preferably, system by the reserved resource of one group of indicated subscriber equipment of this PDCCH signaling mutually orthogonal.
In above-mentioned flow process, the sequential that subscriber equipment can specify according to system sends SRS signal, if user is after n subframe receives this PDCCH, sends SRS signal in k the subframe thereafter of regulation.K can specify by agreement, and the value principle of k is: on the one hand, ensure that subscriber equipment receives, resolves the time delay of PDCCH as far as possible, and process the time delay of the SRS signal that need to report; On the other hand, because agreement may also have been specified the transmission position of other information, therefore should avoid sending conflicting of positions with these information as far as possible.
In specific implementation, for FDD(frequency division duplex system) user, can carry out in n+4 subframe the transmission of SRS signal, wherein, n is the subframe that receives PDCCH signaling; For TDD(tdd systems) user need to send n+k subframe, and wherein, n is the subframe that receives PDCCH signaling, can be different for different time-gap configuration k value.Fig. 2 and Fig. 3 have provided respectively in TDD system, the value of the k under different time-gap configuration.
As shown in Figure 2, for different time slot configuration (the TDD UL/DL Configuration in figure) mode, be DL subframe number n(descending sub frame while counting n) in the subframe that receives PDCCH signaling, the value that the numeral in form is k.For example, the situation that is 0 for TDD UL/DL Configuration, is subframe 0, k=4 if receive the subframe of PDCCH signaling; If receiving the subframe of PDCCH signaling is subframe 1, k=6, the value of the k under other time slot configuration is so analogized.
In another embodiment of the present invention, in PDCCH signaling, can also carry SRS configuration parameter, like this, base station is in triggering multiple subscriber equipmenies transmission SRS signals by a PDCCH signaling, it can also be the transmission parameter of these user device configuration SRS signal, make these subscriber equipmenies send SRS signal according to this transmission parameter, thereby realized the dynamic-configuration of SRS configuration parameter.
Based on identical technical conceive, the embodiment of the present invention also provides respectively a kind of base station equipment and a kind of subscriber equipment.
As shown in Figure 4, the base station equipment that the embodiment of the present invention provides can comprise:
Sending module 401, be used for sending PDCCH signaling, wherein carry the identification information corresponding with multiple subscriber equipmenies, and with described multiple subscriber equipmenies one to one SRS send indication information, described SRS sends indication information and is used to indicate corresponding subscriber equipment and whether sends SRS signal.
Sending module 401 can use SRS radio network temporary identifier as this identification information corresponding with multiple subscriber equipmenies; Can also send described PDCCH signaling at the public search space of PDCCH channel.
It is the sign of 1 bit that the SRS that sending module 401 sends sends indication information.
In the PDCCH signaling that sending module 401 sends, also carry SRS configuration parameter, wherein can comprise burst, band information.
Above-mentioned base station, also can comprise:
Resource reservation module 402, for before sending module 401 sends described PDCCH signaling, for described multiple subscriber equipmenies reserved resource that sends SRS signal respectively, maybe by indicating to described multiple subscriber equipmenies for sending the resource of SRS signal of reserving respectively for described multiple subscriber equipmenies, wherein, for described multiple subscriber equipmenies reserved resource can be mutually orthogonal respectively.
As shown in Figure 5, the subscriber equipment that the embodiment of the present invention provides can comprise:
Receiver module 501, for being during with the described of PDCCH signaling and the corresponding subscriber equipment of identification information that multiple subscriber equipmenies are corresponding at subscriber equipment, receive this PDCCH signaling, in described PDCCH signaling, comprise the SRS corresponding with described subscriber equipment and send indication information.This module is to search for PDCCH at public search space monitoring PDCCH;
Sending module 502, sends and when indication information equipment for indicating user sends SRS signal, sends SRS signal for the described SRS of the PDCCH signaling that receives at receiver module 501.Preferably, can send configuration information according to pre-configured SRS and send SRS signal, also can use as described subscriber equipment sends the reserved resource of SRS signal and send SRS signal;
Sending module 502 can n subframe after the subframe that receives described PDCCH signaling send SRS signal, and wherein, n is default setting, can be with reference to shown in Fig. 2, Fig. 3.
Can find out according to above description, because has carried and multiple subscriber equipmenies SRS transmission one to one instruction in the PDCCH signaling sending base station, thereby can once indicate multiple subscriber equipmenies to send SRS signals by a PDCCH signaling.Accordingly, the subscriber equipment being instructed to is receiving after this PDCCH signaling, can send according to the SRS wherein carrying the process of transmitting of instruction triggering SRS signal.Can find out, above embodiment has realized a PDCCH signaling and triggers multiple subscriber equipmenies and send the effect of SRS signals.
Embodiment bis-
In the present embodiment, network side can be configured to subscriber equipment by SRS configuration parameter in advance, in the time that network side is dispatched certain subscriber equipment, can, by sending downlink transmitting and dispatching signaling to this subscriber equipment, carry out equipment for indicating user send SRS signal by this signaling.
As shown in Figure 6, the SRS signal transmission flow that the present embodiment provides can comprise:
The downlink resource of step 601, base station scheduling subscriber equipment, and send downlink transmitting and dispatching signaling to this subscriber equipment, and use this signaling equipment for indicating user to send uplink SRS signal.
Step 602, subscriber equipment are receiving after this downlink transmitting and dispatching signaling, send SRS signal according to the instruction of this signaling.
In above-mentioned flow process, base station can adopt the mode of dominant instruction by the mode of downlink transmitting and dispatching signaling equipment for indicating user transmission SRS signal, also can adopt the mode of recessive instruction.
If adopt the mode of explicit instruction, the indication information of equipment for indicating user transmission SRS signal can be carried in base station in this downlink transfer signaling.Preferably, this indication information can be the sign of 1 bit length, and is specified the concrete meaning of this sign value by system, as, in the time that this sign is 1, represent to require subscriber equipment to send SRS signal, in the time that this sign is 0, represent not require that subscriber equipment sends SRS signal.In the time of specific implementation, can be in DL grant(descending scheduling signaling) in carry the sign that is used to indicate subscriber equipment and sends SRS signal.
If adopt the mode of implicit expression instruction, can be arranged in advance by system, by other information that may carry in downlink transmitting and dispatching signaling, or the combination of other information indicates whether to need subscriber equipment to send SRS signal.For example,, with the information bit instruction triggering SRS signal of LVRB/DVRB, if this information bit instruction LVRB triggers SRS and sends, otherwise do not trigger.
Preferably, for reducing the blind check number of times of subscriber equipment to downlink transmitting and dispatching signaling, this downlink transmitting and dispatching signaling can adopt the form with existing certain PDCCH format length.
Based on identical technical conceive, the embodiment of the present invention also provides a kind of base station equipment.Network side is configured to subscriber equipment by detecting pilot frequency signal SRS configuration parameter in advance.
As shown in Figure 7, this base station can comprise:
Sending module 701, for sending downlink transmitting and dispatching signaling to subscriber equipment, wherein carry the indication information that is used to indicate described subscriber equipment transmission SRS signal.The described indication information that sending module 701 sends is the sign of 1 bit.The described indication information that sending module 701 sends can also be the information bit of LVRB/DVRB, and if this information bit instruction LVRB, represent that equipment for indicating user sends SRS signal.
Can find out by above description, send SRS signal by downlink transmitting and dispatching signaling equipment for indicating user, make subscriber equipment can send uplink SRS signal in the time carrying out downlink transfer, be conducive to better support the transmission means such as wave beam forming, descending non-code book.Prior art adopts uplink scheduling signaling to trigger subscriber equipment and sends SRS signal, and uplink scheduling signaling can not be used for user and carries out downlink transfer.
Through the above description of the embodiments, those skilled in the art can be well understood to the mode that the present invention can add essential general hardware platform by software and realize, and can certainly pass through hardware, but in a lot of situation, the former is better execution mode.Based on such understanding, the part that technical scheme of the present invention contributes to prior art in essence in other words can embody with the form of software product, this computer software product is stored in a storage medium, comprise that some instructions (can be mobile phones in order to make a station terminal equipment, personal computer, server, or the network equipment etc.) carry out the method described in each embodiment of the present invention.
The above is only the preferred embodiment of the present invention; it should be pointed out that for those skilled in the art, under the premise without departing from the principles of the invention; can also make some improvements and modifications, these improvements and modifications also should be looked protection scope of the present invention.