CN102104460B - 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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- CN102104460B CN102104460B CN 201110066515 CN201110066515A CN102104460B CN 102104460 B CN102104460 B CN 102104460B CN 201110066515 CN201110066515 CN 201110066515 CN 201110066515 A CN201110066515 A CN 201110066515A CN 102104460 B CN102104460 B CN 102104460B
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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 wider system bandwidth of system, adopted carrier aggregation technology in 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 as shown in Figure 1A.
LTE Rel-10 system can support at most 5 carrier waves to carry out polymerization, a UE (terminal) need to be at the ACK (ACKnowledgement of the 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) format1b and the 3 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 format3 transmission plan is 20 bits.In addition, feedback information can also be in the upper transmission of 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 namely the last feedback of main carrier is for 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 to 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.Be example with FDD (Frequency division duplex, Frequency Division Duplexing (FDD)), as configured 2 member carrier polymerizations, each member carrier is transmission 2 code words at most, and the ACK/NACK codebook size is 4 bits.For TDD (Time division duplex, time division duplex), due to the situation that exists sub-frame of uplink less than descending sub frame, UE need to be at the ACK/NACK of a sub-frame of uplink internal feedback for a plurality of descending sub frame PDSCH, take TDD uplink-downlink configuration 2 as example, as shown in Figure 1B, UE need to be in sub-frame of uplink 7 feedbacks for descending sub frame 9,0,1,3 ACK/NACK, simultaneously need to be in sub-frame of uplink 2 feedbacks for descending sub frame 4,5,6,8 ACK/NACK.If UE has been configured 2 downlink member carrier polymerizations, and the transmission mode that configures on each carrier wave allows 2 TB of maximum transmitted, and the ACK/NACK codebook size that need to feed back on the subframe 2 or 7 on up main carrier of UE is 16bits.
Determined in LTE Rel-10 under state of carrier aggregation, the descending PDSCH of each member carrier (Physical Downlink Shared Channel, physical down link sharing channel) transmission mode is separate configurations.In some configuration, UE can not transmit PDSCH in some subframe, but because the size of feedback information in 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 uplink feedback, reduced feedback performance.
In sum, determine that at present the different mode of feedback information bits might increase the bit number of uplink 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 present invention provides might increase the bit number of uplink feedback in order to solve the different mode of definite feedback information bits that exists in prior art, reduce the problem of feedback performance.
The method of a kind of definite feedback information bits number that the embodiment of the present invention provides comprises:
When adopting transmission mode 1～8 downlink data receiving on member carrier, determining can be by the descending sub frame of physical down link sharing channel PDSCH transmitting downlink data in other descending sub frames except multimedia broadcast multi-broadcasting business Single Frequency Network MBSFN subframe on this member carrier;
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.
Better, when adopting transmission mode 9 downlink data receiving on member carrier, determining can be by the descending sub frame of PDSCH transmitting downlink data in all descending sub frames on this member carrier.
Better, 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.
Better, 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 present invention provides comprises:
The subframe determination module, when being used for adopting transmission mode 1～8 downlink data receiving on member carrier, determining can be by the descending sub frame of physical down link sharing channel PDSCH transmitting downlink data in other descending sub frames except the MBSFN subframe on this member carrier;
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, total bit number of definite feedback information that need to send.
Better, described subframe determination module also is used for:
When adopting transmission mode 9 downlink data receiving on member carrier, determining can be by the descending sub frame of PDSCH transmitting downlink data in all descending sub frames on this member carrier.
Better, 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.
Better, described equipment is applied to TDD system and FDD system.
Due to the feedback information of the subframe of only considering to transmit PDSCH when determining that feedback information bits is counted, thereby avoid the feedback information of redundancy, reduced the bit number of uplink feedback, improved feedback performance and PDSCH transmission performance.
Description of drawings
Figure 1A is background technology intermediate frequency spectrum paradigmatic system schematic diagram;
Figure 1B is the feedback sequential chart of TDD uplink-downlink configuration 2 in background technology;
Fig. 2 is the device structure schematic diagram that the embodiment of the present invention is determined the feedback information bits number;
Fig. 3 is the method flow schematic diagram that the embodiment of the present invention is determined the feedback information bits number;
Fig. 4 is UE2 polymerization CC (Component Carrier of embodiment of the present invention the first TDD, member carrier) MBSFN 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 UE2 polymerization CC of embodiment of the present invention the second TDD;
Fig. 6 is MBSFN subframe and the transmission mode configuration on UE4 polymerization CC of embodiment of the present invention FDD.
Embodiment
Can transmit the bit number of feedback information of the descending sub frame of PDSCH in the embodiment of the present invention a plurality of member carriers corresponding according to the sub-frame of uplink that feeds back in up main carrier, need determine total bit number of the feedback information that sends.Due to the feedback information of the subframe of only considering to transmit PDSCH when determining that feedback information bits is counted, thereby avoid the feedback information of redundancy, reduced the bit number of uplink feedback.
The scheme of the embodiment of the present invention can be applied to TDD system and FDD system.
Below in conjunction with Figure of description, the embodiment of the present invention is described in further detail.
As shown in Figure 2, the embodiment of the present invention determines that the equipment of feedback information bits number comprises: subframe determination module 10 and bit number determination module 20.
Subframe determination module 10 be used for to determine can to transmit in corresponding a plurality of member carriers of sub-frame of uplink that up main carrier feeds back the descending sub frame of PDSCH.
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 corresponding 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 corresponding member carrier of sub-frame of uplink is at least one, is specifically stipulated by 3GPP TS36.213Rel-10Table10.1-1.
In LTE Rel-10, the descending PDSCH transmission mode of each member carrier is separate configurations, and the transmission mode of wherein supporting 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, i.e. front 1-2 OFDM symbol transmission control signal of a descending sub frame, and can not transmit PDSCH for transmission mode 1-8 in the MBSFN subframe, can transmit PDSCH based on DMRS (Demodulation Reference Symbol, demodulation reference mark) for transmission mode 9 in the MBSFN subframe.
Based on this, better, when subframe determination module 10 adopts transmission mode 1～8 downlink data receiving on member carrier, the descending sub frame that can transmit PDSCH of determining in other descending sub frames on this member carrier except the MBSFN subframe;
When subframe determination module 10 adopts transmission mode 9 downlink data receiving on member carrier, the descending sub frame that can transmit PDSCH of determining in all descending sub frames on this member carrier.
Better, 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 corresponding descending sub frame 1 of uplink feedback subframe on member carrier 1 is 2, the bit number of descending sub frame 2 is 2, and the total bit number for 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 present invention can be terminal, can be also other equipment that need to 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 present invention, the principle of dealing with problems due to the method and the unit affinity of definite feedback information bits number, so the enforcement of the method can referring to the enforcement of equipment, repeat part and repeat no more.
As shown in Figure 3, the embodiment of the present invention determines that the method for feedback information bits number comprises the following steps:
Step 301, determine to transmit in the corresponding a plurality of member carriers of the sub-frame of uplink that feeds back in up main carrier the descending sub frame of PDSCH.
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.
In LTE Rel-10, the descending PDSCH transmission mode of each member carrier is separate configurations, and the transmission mode of wherein supporting comprises 9 kinds, specifically referring to table 1.
The LTE system supports descending MBSFN subframe type, i.e. front 1-2 OFDM symbol transmission control signal of a descending sub frame, and can not transmit PDSCH in the MBSFN subframe for transmission mode 1-8, can transmit PDSCH based on DMRS for transmission mode 9 in the MBSFN subframe.
Based on this, better, when adopting transmission mode 1～8 downlink data receiving in step 301 on member carrier, the descending sub frame that can transmit PDSCH of determining in other descending sub frames on this member carrier except the MBSFN subframe;
When adopting transmission mode 9 downlink data receiving in step 301 on member carrier, the descending sub frame that can transmit PDSCH of determining in all descending sub frames on this member carrier.
Better, in 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.
The below enumerates several examples the solution of the present invention is elaborated.
Take Fig. 4 as 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 to respectively feed back in subframe 2 or 7 the ACK/NACK information of 16bits according to present mode UE, and this is wherein redundant information for subframe 3,4,8 and 9 feedback information, there is no physical meaning, therefore actual each feedback has been transmitted the 8bits garbage more, can cause like this ACK/NACK feedback performance to descend, remote-effects downlink transfer performance.
Scheme according to the embodiment of the present invention is only being fed back the ACK/NACK information (being subframe 5 and 6) of the non-MBSFN subframe on corresponding each CC on the subframe 2 of up main carrier, corresponding ACK/NACK codebook size is 8 bits; Only feeding back the ACK/NACK information (being subframe 0 and 1) of 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 same scene, the solution of the present invention has been saved 8bits, thereby the bit number of uplink feedback has improved feedback performance and PDSCH transmission performance.
Take Fig. 5 as example, UE is configured to transmission mode 8 on CC1, is configured to transmission mode 9 on CC2, should get rid of feedback bits corresponding to MBSFN subframe on CC1 when calculating ACK/NACK feedback codebook size.Namely feedback on the subframe 2 of up main carrier for 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 for 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.
Take Fig. 6 as example, suppose not have the ACK/NACK between the code word of space to merge.
When calculating ACK/NACK feedback codebook size, get rid of feedback bits corresponding to each MBSFN subframe on DL CC1 and DL CC2.Namely 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 namely feeding back codebook size is 4bits; In 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 namely feeding back codebook size is 4bits.
Those skilled in the art should understand, embodiments of the invention can be provided as method, system or computer program.Therefore, the present invention can adopt complete hardware implementation example, implement software example or in conjunction with the form of the embodiment of software and hardware aspect fully.And the present invention can adopt the form that wherein includes the upper computer program of implementing of computer-usable storage medium (including but not limited to magnetic disc store, CD-ROM, optical memory etc.) of computer usable program code one or more.
The present invention is that reference is described according to flow chart and/or the block diagram of method, equipment (system) and the computer program of the embodiment of the present invention.Should understand can be by the flow process in each flow process in computer program instructions realization flow figure and/or block diagram and/or square frame and flow chart and/or 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 realizing in the function of 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 realized 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 be provided for realizing 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 in the instruction of carrying out on computer or other programmable devices.
Although described the preferred embodiments of the present invention, in a single day those skilled in the art get the basic creative concept of cicada, 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.
Due to the feedback information of the subframe of only considering to transmit PDSCH when determining that feedback information bits is counted, thereby avoid the feedback information of redundancy, reduced the bit number of uplink feedback, improved feedback performance and PDSCH transmission performance.
Obviously, those skilled in the art can carry out various changes and modification and not break away from the spirit and scope of the present invention the present invention.Like this, if within of the present invention these are revised and modification belongs to the scope of claim of the present invention and equivalent technologies thereof, the present invention also is intended to comprise these changes and modification interior.
Claims (8)
1. the method for a definite feedback information bits number, is characterized in that, the method comprises:
When adopting transmission mode 1～8 downlink data receiving on member carrier, determining can be by the descending sub frame of physical down link sharing channel PDSCH transmitting downlink data in other descending sub frames except multimedia broadcast multi-broadcasting business Single Frequency Network MBSFN subframe on this member carrier;
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, when adopting transmission mode 9 downlink data receiving on member carrier, determining can be by the descending sub frame of PDSCH transmitting downlink data in all descending sub frames on this member carrier.
3. described method as arbitrary in claim 1～2, 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.
4. described method as arbitrary in claim 1～2, is characterized in that, described method is applied to TDD system and FDD system.
5. the equipment of a definite feedback information bits number, is characterized in that, this equipment comprises:
The subframe determination module, when being used for adopting transmission mode 1～8 downlink data receiving on member carrier, determining can be by the descending sub frame of physical down link sharing channel PDSCH transmitting downlink data in other descending sub frames except the MBSFN subframe on this member carrier;
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, total bit number of definite feedback information that need to send.
6. equipment as claimed in claim 5, is characterized in that, described subframe determination module also is used for:
When adopting transmission mode 9 downlink data receiving on member carrier, determining can be by the descending sub frame of PDSCH transmitting downlink data in all descending sub frames on this member carrier.
7. described equipment as arbitrary in claim 5～6, 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.
8. described equipment as arbitrary in claim 5～6, is characterized in that, described equipment is applied to TDD system and FDD system.
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| CN104471877B (en) * | 2012-07-13 | 2018-01-30 | Lg电子株式会社 | The method and apparatus for sending control information |
| WO2014019236A1 (en) | 2012-08-03 | 2014-02-06 | Nokia Siemens Networks Oy | Method and apparatus |
| CN103828281B (en) * | 2012-09-17 | 2017-12-05 | 华为技术有限公司 | Descending sub frame feedback method, base station and user equipment |
| 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 |
| 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 |
| CN107733475B (en) * | 2016-08-12 | 2021-06-18 | 大唐移动通信设备有限公司 | Method and device for determining feedback codebook |
| WO2019075693A1 (en) * | 2017-10-19 | 2019-04-25 | 华为技术有限公司 | Method and apparatus for processing harq feedback codebook |
| CN110166214B (en) | 2018-02-13 | 2020-08-21 | 华为技术有限公司 | Method and communication device for transmitting feedback information |
| WO2019157920A1 (en) * | 2018-02-13 | 2019-08-22 | 华为技术有限公司 | Method for transmitting feedback information and communication device |
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| CN101951684A (en) * | 2010-09-30 | 2011-01-19 | 中兴通讯股份有限公司 | Method for sending acknowledgement information and user terminal |
| CN101958777A (en) * | 2010-09-28 | 2011-01-26 | 中兴通讯股份有限公司 | Processing method and device for sending correct/error response messages |
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| US8199666B2 (en) * | 2009-02-02 | 2012-06-12 | Texas Instruments Incorporated | Transmission of acknowledge/not-acknowledge with repetition |
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| CN101958777A (en) * | 2010-09-28 | 2011-01-26 | 中兴通讯股份有限公司 | Processing method and device for sending correct/error response messages |
| CN101951684A (en) * | 2010-09-30 | 2011-01-19 | 中兴通讯股份有限公司 | Method for sending acknowledgement information and user terminal |
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