CN102104460A - Method and equipment for determining bit number of feedback information - Google Patents
Method and equipment for determining bit number of feedback information Download PDFInfo
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- CN102104460A CN102104460A CN2011100665158A CN201110066515A CN102104460A CN 102104460 A CN102104460 A CN 102104460A CN 2011100665158 A CN2011100665158 A CN 2011100665158A CN 201110066515 A CN201110066515 A CN 201110066515A CN 102104460 A CN102104460 A CN 102104460A
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Abstract
The embodiment of the invention relates to the technical field of wireless communication, in particular to a method and equipment for determining a bit number of feedback information, and is used for solving the problems that the bit number of uplink feedback is possibly increased and the feedback performance is reduced in the method for determining the bit number of feedback information in the prior art. The method comprises the following steps of: determining a downlink subframe which can transmit a physical downlink shared channel (PDSCH) in a plurality of member carriers corresponding to an uplink subframe fed back in an uplink main carrier; and determining the total bit number of the feedback information needed to be transmitted according to the bit number of feedback information of the downlink subframe in each determined member carrier. Because the feedback information of the subframe capable of transmitting the PDSCH is only considered in the process of determining the bit number of the feedback information, redundant feedback information is avoided, the bit number of the uplink feedback is reduced, and the feedback performance and PDSCH transmission performance are improved.
Description
Technical field
The present invention relates to wireless communication technology field, particularly a kind of method and apparatus of definite feedback information bits number.
Background technology
For long-term evolution multi-carrier system, for supporting than LTE (Long Term Evolution, Long Term Evolution) the wideer system bandwidth of system, adopted carrier aggregation technology among the LTE Rel-10 (version 10), be about to a plurality of continuous or discrete carrier aggregation and carry out work together, the peak rate of raising system is shown in Figure 1A.
LTE Rel-10 system can support 5 carrier waves to carry out polymerization at most, a UE (terminal) need be at the ACK (ACKnowledgement of corresponding a plurality of descending carriers of same sub-frame of uplink internal feedback and descending sub frame, correctly reply instruction)/NACK (Negative ACKnowledgement, wrong responses instruction) feedback information.Determined PUCCH (Physical Uplink Control Channel in the LTE-A system, Physical Uplink Control Channel) format 1b and 3 the multiplexing transmission schemes on PUCCH as feedback information, wherein the maximum transmitted bit number of PUCCH format 1b transmission plan is 4 bits, and the maximum transmitted bit number of PUCCH format 3 transmission plans is 20 bits.In addition, feedback information can also be gone up transmission at PUSCH (Physical Uplink Shared Channel, physical uplink link sharing channel).The UCI of PUCCH and PUSCH (Uplink Control Information, ascending control information) transmission all can only send on up main carrier, and promptly the last feedback of main carrier is at the feedback information of a plurality of descending carriers.
Under the Rel-10 state of carrier aggregation, determined that the ACK/NACK codebook size that UE need feed back determines to the downlink member carrier number of this UE configuration and the transmission block number of each member carrier according to the base station.With FDD (Frequency division duplex, Frequency Division Duplexing (FDD)) is example, as has disposed 2 member carrier polymerizations, and each member carrier is transmission 2 code words at most, and then the ACK/NACK codebook size is 4 bits.For TDD (Time division duplex, time division duplex), owing to there be the situation of sub-frame of uplink less than descending sub frame, UE need be an example with TDD uplink-downlink configuration 2, shown in Figure 1B at the ACK/NACK of a sub-frame of uplink internal feedback at a plurality of descending sub frame PDSCH, UE need be in sub-frame of uplink 7 feedbacks at descending sub frame 9,0,1,3 ACK/NACK, simultaneously need be in sub-frame of uplink 2 feedbacks at descending sub frame 4,5,6,8 ACK/NACK.If UE has been configured 2 downlink member carrier polymerizations, and the transmission mode that disposes on each carrier wave allows 2 TB of maximum transmitted, and then the ACK/NACK codebook size that need feed back on the subframe on the up main carrier 2 or 7 of UE is 16bits.
Determined among the LTE Rel-10 that under state of carrier aggregation the descending PDSCH of each member carrier (Physical Downlink Shared Channel, physical down link sharing channel) transmission mode is a separate configurations.In some configuration, UE can not transmit PDSCH in some subframe, but owing to the size of feedback information in the present design is not considered subframe type, will not need also taking into account at ripple of feedback information, thereby increased the bit number of up feedback, reduced feedback performance.
In sum, determine that at present the different mode of feedback information bits might increase the bit number of up feedback, reduce feedback performance.
Summary of the invention
The method and apparatus of a kind of definite feedback information bits number that the embodiment of the invention provides might increase the bit number of up feedback in order to solve the different mode of definite feedback information bits that exists in the prior art, reduces the problem of feedback performance.
The method of a kind of definite feedback information bits number that the embodiment of the invention provides comprises:
Determine in the pairing a plurality of member carriers of the sub-frame of uplink that feeds back in the up main carrier can transmitting physical downlink sharied signal channel PDSCH descending sub frame;
According to the bit number of the feedback information of descending sub frame in each member carrier of determining, definite total bit number that needs the feedback information of transmission.
Preferable, described definite descending sub frame that can transmit PDSCH comprises:
When on member carrier, adopting transmission mode 1～8 downlink data receiving, the descending sub frame of determining in other descending sub frames on this member carrier except that multimedia broadcast multi-broadcasting business Single Frequency Network MBSFN subframe that can transmit PDSCH.
Preferable, describedly determine on each member carrier that each subframe that can transmit PDSCH comprises:
When on member carrier, adopting transmission mode 9 downlink data receivings, the descending sub frame of determining in all descending sub frames on this member carrier that can transmit PDSCH.
Preferable, described definite total bit number of the feedback information of transmission that needs comprises:
With the bit number addition of the feedback information of descending sub frame in each member carrier of determining, the numerical value that obtains is as total bit number of the feedback information of needs transmission.
Preferable, described method is applied to TDD system and FDD system.
The equipment of a kind of definite feedback information bits number that the embodiment of the invention provides comprises:
The subframe determination module is used for determining can transmitting in the pairing a plurality of member carriers of sub-frame of uplink that up main carrier feeds back the descending sub frame of PDSCH;
The bit number determination module is used for the bit number according to the feedback information of each member carrier descending sub frame of determining, definite total bit number that needs the feedback information of transmission.
Preferable, described subframe determination module specifically is used for:
When on member carrier, adopting transmission mode 1～8 downlink data receiving, the descending sub frame of determining in other descending sub frames on this member carrier except that the MBSFN subframe that can transmit PDSCH.
Preferable, described subframe determination module specifically is used for:
When on member carrier, adopting transmission mode 9 downlink data receivings, the descending sub frame of determining in all descending sub frames on this member carrier that can transmit PDSCH.
Preferable, described bit number determination module specifically is used for:
With the bit number addition of the feedback information of descending sub frame in each member carrier of determining, the numerical value that obtains is as total bit number of the feedback information of needs transmission.
Preferable, described equipment is applied to TDD system and FDD system.
Owing to when determining that feedback information bits is counted, only consider to transmit the feedback information of the subframe of PDSCH, thereby avoid redundant feedback information, reduced the bit number of up feedback, improved feedback performance and PDSCH transmission performance.
Description of drawings
Figure 1A is a background technology intermediate frequency spectrum paradigmatic system schematic diagram;
Figure 1B is the feedback sequential chart of TDD uplink-downlink configuration 2 in the background technology;
Fig. 2 determines the device structure schematic diagram of feedback information bits number for the embodiment of the invention;
Fig. 3 determines the method flow schematic diagram of feedback information bits number for the embodiment of the invention;
Fig. 4 is 2 polymerization CC (Component Carrier of first kind of TDD UE of the embodiment of the invention, member carrier) the MB SFN on (Multimedia Broadcast multicast service Single Frequency Network, multimedia broadcast multi-broadcasting business Single Frequency Network) subframe and transmission mode configuration schematic diagram;
Fig. 5 is MBSFN subframe and the transmission mode configuration schematic diagram on 2 polymerization CC of second kind of TDD UE of the embodiment of the invention;
Fig. 6 is MBSFN subframe and the transmission mode configuration on 4 polymerization CC of embodiment of the invention FDD UE.
Embodiment
The embodiment of the invention is determined total bit number of the feedback information that needs send according to the bit number of the feedback information of the descending sub frame that can transmit PDSCH in the pairing a plurality of member carriers of the sub-frame of uplink that feeds back in the up main carrier.Owing to when determining that feedback information bits is counted, only consider to transmit the feedback information of the subframe of PDSCH, thereby avoid redundant feedback information, reduced the bit number of up feedback.
The scheme of the embodiment of the invention can be applied to TDD system and FDD system.
Below in conjunction with Figure of description the embodiment of the invention is described in further detail.
As shown in Figure 2, the embodiment of the invention determines that the equipment of feedback information bits number comprises: subframe determination module 10 and bit number determination module 20.
Bit number determination module 20 is used for the bit number of the feedback information of each member carrier descending sub frame of determining according to subframe determination module 10, need to determine total bit number of the feedback information that sends.
Wherein, for the FDD system, the quantity that can transmit the descending sub frame of PDSCH in the pairing member carrier of sub-frame of uplink is one;
For the TDD system, the quantity that can transmit the descending sub frame of PDSCH in the pairing member carrier of sub-frame of uplink is at least one, is specifically stipulated by 3GPP TS 36.213 Rel-10 Table 10.1-1.
The descending PDSCH transmission mode of each member carrier is a separate configurations among the LTE Rel-10, and wherein the transmission mode of Zhi Chiing comprises 9 kinds, specifically referring to table 1.
| |
| 1. single port transmission (port 0) |
| 2. transmit |
| 3. Open-Loop |
| 4. Closed-Loop |
| 5. multiuser MIMO |
| 6. order is 1 closed |
| 7. single port transmission (port 5) |
| 8. dual- |
| 9. support maximum 8 layers of transmission |
Table 1
The LTE system supports descending MBSFN subframe type, promptly preceding 1-2 OFDM symbol transmission of a descending sub frame controlled signaling, and for transmission mode 1-8, in the MBSFN subframe, can not transmit PDSCH, can in the MBSFN subframe, transmit PDSCH for transmission mode 9 based on DMRS (Demodulation Reference Symbol, demodulation reference mark).
Based on this, preferable, when subframe determination module 10 adopts transmission mode 1～8 downlink data receiving on member carrier, the descending sub frame of determining in other descending sub frames on this member carrier except that the MBSFN subframe that can transmit PDSCH;
When subframe determination module 10 adopts transmission mode 9 downlink data receivings on member carrier, the descending sub frame of determining in all descending sub frames on this member carrier that can transmit PDSCH.
Preferable, the bit number addition of the feedback information of descending sub frame in each member carrier that bit number determination module 20 will be determined, the numerical value that obtains is as total bit number of the feedback information of needs transmission.
Such as the bit number of determining a pairing descending sub frame 1 of up feedback subframe on the member carrier 1 is 2, and the bit number of descending sub frame 2 is 2, and then the total bit number at the feedback information of the descending sub frame 1 of member carrier 1 and 2 is 4.
Wherein, the equipment of definite feedback information bits number of the embodiment of the invention can be terminal, also can be other equipment that need determine the feedback information bits number.
Based on same inventive concept, a kind of method of definite feedback information bits number also is provided in the embodiment of the invention, because the principle that this method is dealt with problems and the unit affinity of definite feedback information bits number, so the enforcement of this method can repeat part and repeat no more referring to the enforcement of equipment.
As shown in Figure 3, the embodiment of the invention determines that the method for feedback information bits number comprises the following steps:
The bit number of the feedback information of descending sub frame in each member carrier that step 302, basis are determined, definite total bit number that needs the feedback information of transmission.
The descending PDSCH transmission mode of each member carrier is a separate configurations among the LTE Rel-10, and wherein the transmission mode of Zhi Chiing comprises 9 kinds, specifically referring to table 1.
The LTE system supports descending MBSFN subframe type, promptly preceding 1-2 OFDM symbol transmission of a descending sub frame controlled signaling, and for transmission mode 1-8, in the MBSFN subframe, can not transmit PDSCH, can in the MBSFN subframe, transmit PDSCH for transmission mode 9 based on DMRS.
Based on this, preferable, when on member carrier, adopting transmission mode 1～8 downlink data receiving in the step 301, the descending sub frame of determining in other descending sub frames on this member carrier except that the MBSFN subframe that can transmit PDSCH;
When on member carrier, adopting transmission mode 9 downlink data receivings in the step 301, the descending sub frame of determining in all descending sub frames on this member carrier that can transmit PDSCH.
Preferable, in the step 302, with the bit number addition of the feedback information of descending sub frame in each member carrier of determining, the numerical value that obtains is as total bit number of the feedback information of needs transmission.
Enumerating several examples below is elaborated to the solution of the present invention.
With Fig. 4 is example, TDD UE polymerization 2 descending carriers, the transmission mode on each member carrier is pattern 8, and the subframe 3,4,8 and 9 in 2 carrier waves all is configured to the MBSFN subframe.
Still need respectively feed back the ACK/NACK information of 16bits in subframe 2 or 7 according to present mode UE, and this is a redundant information at the feedback information of subframe 3,4,8 and 9 wherein, there is not physical meaning, therefore actual each feedback has been transmitted the 8bits garbage more, can cause the ACK/NACK feedback performance to descend remote-effects downlink transfer performance like this.
In the ACK/NACK information (being subframe 5 and 6) of the non-MBSFN subframe on corresponding each CC of feedback only on the subframe 2 of up main carrier, corresponding ACK/NACK codebook size is 8 bits according to the scheme of the embodiment of the invention; In the ACK/NACK information (being subframe 0 and 1) of only feeding back the non-MBSFN subframe on corresponding each CC on the subframe 7 of up main carrier, corresponding ACK/NACK codebook size is 8 bits.
As can be seen from the above: under the same scene, the solution of the present invention has been saved 8bits, thereby the bit number of up feedback has improved feedback performance and PDSCH transmission performance.
With Fig. 5 is example, and UE is configured to transmission mode 8 on CC1, be configured to transmission mode 9 on CC2, should get rid of the feedback bits of the MBSFN subframe correspondence on the CC1 when then calculating ACK/NACK feedback codebook size.Promptly feedback on the subframe 2 of up main carrier at CC1 on subframe 5 and 6 and CC2 on subframe 4,5,6 and 8 ACK/NACK information, corresponding ACK/NACK codebook size is 12 bits; Feedback on the subframe 7 of up main carrier at CC1 on subframe 0 and 1 and CC2 on subframe 9,0,1 and 3 ACK/NACK information, corresponding ACK/NACK codebook size is 12 bits.
With Fig. 6 is example, supposes not have the ACK/NACK between the code word of space to merge.
When calculating ACK/NACK feedback codebook size, get rid of the feedback bits of each MBSFN subframe correspondence on DL CC1 and the DL CC2.Promptly the sub-frame of uplink 5 and 6 at up main carrier feeds back corresponding to the descending sub frame 1 of descending carrier and 2 ACK/NACK information, and only comprise the corresponding feedback bits of DL CC3 and DL CC4 this moment, and promptly feeding back codebook size is 4bits; In the sub-frame of uplink 0 and the 1 ACK/NACK information of feeding back corresponding to descending carrier descending sub frame 6 and 7 of main carrier, only comprise the corresponding feedback bits of DL CC3 and DL CC4 this moment, and promptly feeding back codebook size is 4bits.
Those skilled in the art should understand that embodiments of the invention can be provided as method, system or computer program.Therefore, the present invention can adopt complete hardware embodiment, complete software implementation example or in conjunction with the form of the embodiment of software and hardware aspect.And the present invention can adopt the form that goes up the computer program of implementing in one or more computer-usable storage medium (including but not limited to magnetic disc store, CD-ROM, optical memory etc.) that wherein include computer usable program code.
The present invention is that reference is described according to the flow chart and/or the block diagram of method, equipment (system) and the computer program of the embodiment of the invention.Should understand can be by the flow process in each flow process in computer program instructions realization flow figure and/or the block diagram and/or square frame and flow chart and/or the block diagram and/or the combination of square frame.Can provide these computer program instructions to the processor of all-purpose computer, special-purpose computer, Embedded Processor or other programmable data processing device to produce a machine, make the instruction of carrying out by the processor of computer or other programmable data processing device produce to be used for the device of the function that is implemented in flow process of flow chart or a plurality of flow process and/or square frame of block diagram or a plurality of square frame appointments.
These computer program instructions also can be stored in energy vectoring computer or the computer-readable memory of other programmable data processing device with ad hoc fashion work, make the instruction that is stored in this computer-readable memory produce the manufacture that comprises command device, this command device is implemented in the function of appointment in flow process of flow chart or a plurality of flow process and/or square frame of block diagram or a plurality of square frame.
These computer program instructions also can be loaded on computer or other programmable data processing device, make on computer or other programmable devices and to carry out the sequence of operations step producing computer implemented processing, thereby the instruction of carrying out on computer or other programmable devices is provided for being implemented in the step of the function of appointment in flow process of flow chart or a plurality of flow process and/or square frame of block diagram or a plurality of square frame.
Although described the preferred embodiments of the present invention, in a single day those skilled in the art get the basic creative notion of cicada, then can make other change and modification to these embodiment.So claims are intended to all changes and the modification that are interpreted as comprising preferred embodiment and fall into the scope of the invention.
Owing to when determining that feedback information bits is counted, only consider to transmit the feedback information of the subframe of PDSCH, thereby avoid redundant feedback information, reduced the bit number of up feedback, improved feedback performance and PDSCH transmission performance.
Obviously, those skilled in the art can carry out various changes and modification to the present invention and not break away from the spirit and scope of the present invention.Like this, if of the present invention these are revised and modification belongs within the scope of claim of the present invention and equivalent technologies thereof, then the present invention also is intended to comprise these changes and modification interior.
Claims (10)
1. the method for a definite feedback information bits number is characterized in that, this method comprises:
Determine in the pairing a plurality of member carriers of the sub-frame of uplink that feeds back in the up main carrier can transmitting physical downlink sharied signal channel PDSCH descending sub frame;
According to the bit number of the feedback information of descending sub frame in each member carrier of determining, definite total bit number that needs the feedback information of transmission.
2. the method for claim 1 is characterized in that, described definite descending sub frame that can transmit PDSCH comprises:
When on member carrier, adopting transmission mode 1～8 downlink data receiving, the descending sub frame of determining in other descending sub frames on this member carrier except that multimedia broadcast multi-broadcasting business Single Frequency Network MBSFN subframe that can transmit PDSCH.
3. the method for claim 1 is characterized in that, describedly determines on each member carrier that each subframe that can transmit PDSCH comprises:
When on member carrier, adopting transmission mode 9 downlink data receivings, the descending sub frame of determining in all descending sub frames on this member carrier that can transmit PDSCH.
4. as the arbitrary described method of claim 1～3, it is characterized in that described definite total bit number of the feedback information of transmission that needs comprises:
With the bit number addition of the feedback information of descending sub frame in each member carrier of determining, the numerical value that obtains is as total bit number of the feedback information of needs transmission.
5. as the arbitrary described method of claim 1～3, it is characterized in that described method is applied to TDD system and FDD system.
6. the equipment of a definite feedback information bits number is characterized in that, this equipment comprises:
The subframe determination module is used for determining can transmitting in the pairing a plurality of member carriers of sub-frame of uplink that up main carrier feeds back the descending sub frame of PDSCH;
The bit number determination module is used for the bit number according to the feedback information of each member carrier descending sub frame of determining, definite total bit number that needs the feedback information of transmission.
7. equipment as claimed in claim 6 is characterized in that, described subframe determination module specifically is used for:
When on member carrier, adopting transmission mode 1～8 downlink data receiving, the descending sub frame of determining in other descending sub frames on this member carrier except that the MBSFN subframe that can transmit PDSCH.
8. equipment as claimed in claim 6 is characterized in that, described subframe determination module specifically is used for:
When on member carrier, adopting transmission mode 9 downlink data receivings, the descending sub frame of determining in all descending sub frames on this member carrier that can transmit PDSCH.
9. as the arbitrary described equipment of claim 6～8, it is characterized in that described bit number determination module specifically is used for:
With the bit number addition of the feedback information of descending sub frame in each member carrier of determining, the numerical value that obtains is as total bit number of the feedback information of needs transmission.
10. as the arbitrary described equipment of claim 6～8, it is characterized in that described equipment is applied to TDD system and FDD system.
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| WO2017028042A1 (en) * | 2015-08-14 | 2017-02-23 | 华为技术有限公司 | Uplink control information transmitting method and receiving method, user equipment, and base station |
| CN107733475A (en) * | 2016-08-12 | 2018-02-23 | 电信科学技术研究院 | A kind of determination method and device for feeding back code book |
| WO2019075693A1 (en) * | 2017-10-19 | 2019-04-25 | 华为技术有限公司 | Method and apparatus for processing harq feedback codebook |
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| CN104301083B (en) * | 2014-09-30 | 2017-10-13 | 大唐移动通信设备有限公司 | A kind of carrier polymerizing method and equipment based on TM9 |
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| CN104301083A (en) * | 2014-09-30 | 2015-01-21 | 大唐移动通信设备有限公司 | Carrier aggregation method and equipment based on TM9 |
| WO2017028042A1 (en) * | 2015-08-14 | 2017-02-23 | 华为技术有限公司 | Uplink control information transmitting method and receiving method, user equipment, and base station |
| CN107733475A (en) * | 2016-08-12 | 2018-02-23 | 电信科学技术研究院 | A kind of determination method and device for feeding back code book |
| WO2019075693A1 (en) * | 2017-10-19 | 2019-04-25 | 华为技术有限公司 | Method and apparatus for processing harq feedback codebook |
| WO2019157920A1 (en) * | 2018-02-13 | 2019-08-22 | 华为技术有限公司 | Method for transmitting feedback information and communication device |
| US11533150B2 (en) | 2018-02-13 | 2022-12-20 | Huawei Technologies Co., Ltd. | Feedback information transmission method and communication device |
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