CN104243109B - A method of the hybrid automatic retransmission request information of upstream data is indicated - Google Patents
A method of the hybrid automatic retransmission request information of upstream data is indicated Download PDFInfo
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- CN104243109B CN104243109B CN201310224947.6A CN201310224947A CN104243109B CN 104243109 B CN104243109 B CN 104243109B CN 201310224947 A CN201310224947 A CN 201310224947A CN 104243109 B CN104243109 B CN 104243109B
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Abstract
This application discloses a kind of method of the hybrid automatic retransmission request information instruction to upstream data, this method includes：Base station sends the upstream data HARQ message for increasing Downlink Control Information DCI format newly on ePDCCH to each UE, when any UE receives the upstream data HARQ message of the newly-increased DCI format of base station transmission, according to the HARQ index that the base station is this UE distribution, it obtains corresponding HARQ command informations in upstream data HARQ message, and determines whether according to the HARQ command informations of acquisition to send the upstream data of last transmission again.When realizing that the HARQ information to upstream data indicates, expense is small, and is changed to consensus standard small.
Description
Technical field
This application involves field of communication technology, more particularly to a kind of hybrid automatic repeat-requests to upstream data（HARQ）
The method of information instruction.
Background technology
Backward compatibility carrier wave（LCT）Pass through physical mixing retransmission indicating chanel（PHICH）It is provided in detail for upstream data
Downlink acknowledgement/non-acknowledgement（ACK/NACK）Signaling.In non-backward compatible carrier waves（NCT）In introduce enhancing physical down
Control channel（ePDCCH）, Data Position send, it is therefore an objective to enhance control channel capacity and preferably using frequency domain come into
Row coordinating district interference（Inter-Cell Interference Coordination, ICIC）, likewise, drawing in new carrier wave
The PHICH for entering enhancing also realizes same function.
Under carrier aggregation scene in LTE Rel-10, PHICH be sent in the cell of dispatching uplink data channel, and
And the PUSCH of the control channel scheduling even enhanced in Rel-11, and indicate that the HARQ of upstream data believes with PHICH
Breath also means that uplink assigns（UL grant）With PHICH sent out in identical cell, no matter the UL grant be
PDCCH is still sent on ePDCCH.Due to lacking cell-specific pilot tone（CRS）, be not suitable in new carrier wave sending PHICH, when
PUSCH on NCT is when cross-carrier scheduling on LCT, because criterion is UL grant and PUSCH, corresponding PHICH is
It is sent in identical cell, the corresponding PHICH of the upper PUSCH of NCT can be sent on LCT, however the PUSCH on NCT is from NCT
When itself is dispatched, need to solve the problems, such as to be not suitable for sending PHICH on NCT.
If continuing to use the scheme of PHICH to carry out the HARQ feedback of upstream data, there are also problems, because of LTE Rel-11
In PHICH be to be sent on the corresponding carrier waves of UL grant, for the upstream data that new carrier wave is independently dispatched, PHICH needs
It is sent on NCT, and since the CRS in new carrier wave has carried out cost reduction, so it is that there are problems to send PHICH in new carrier wave
's.
There are multiple methods that can provide ascending HARQ ACK/NACK signalings corresponding with down control channel is enhanced.
PHICH on LCT can be used as the HARQ information feedback of the PUSCH on NCT, even if PUSCH is by first method
What the ePDCCH on identical NCT was dispatched.The problem of this method, is, on the one hand incompatible with the standard of Rel-11, separately
On the one hand it is in TDD system, it is possible to which the upper no corresponding downlink subframes of LCT are used for sending PHICH.
Second method may be used implicit ACK/NACK signalings and be used as ascending HARQ ACK/NACK signalings, in wireless
After（relay）Return link be exactly in this way.If ePDCCH Schedule retransmissions, when new data indicates（NDI）It is 1
When, new data are dispatched, and when NDI is 0, schedule re-transmission data, if UE does not detect the uplink of ePDCCH
It assigns（UL grant）, UE is construed to ACK.The method provides a very simple modes to send ACK/NACKs, and
And because UL grant are sent on ePDCCH, ascending HARQ signaling can obtain the benefit of all ePDCCH.In the presence of
The problem of be that expense is larger because each NACK needs to send complete UL grant.
In conclusion not proposing also in NCT a kind of to change standard small, and the upstream data that expense is small in existing realization
The method of HARQ information instruction.
Invention content
In view of this, the application provides a kind of side of the hybrid automatic retransmission request information instruction to upstream data
Method, when realizing that the HARQ information to upstream data indicates, expense is small, and is changed to consensus standard small.
In order to solve the above technical problems, the technical proposal of the invention is realized in this way：
A method of the hybrid automatic repeat-request HARQ information of upstream data is indicated, is applied to include user equipment
In UE and the network based on non-backward compatible carrier waves NCT of base station, the base station in the network is that each UE distributes different HARQ- ropes
Draw index, including：
The base station sends to each UE on enhancing Physical Downlink Control Channel ePDCCH and increases Downlink Control Information DCI format newly
Upstream data HARQ message, upstream data HARQ message this base station be each UE distribution the corresponding positions HARQ-index
The upper HARQ command informations for carrying each UE；
When any UE receives the upstream data HARQ message of the newly-increased DCI format of base station transmission, it is according to the base station
The HARQ-index of this UE distribution, obtains corresponding HARQ command informations, and according to acquisition in upstream data HARQ message
HARQ command informations determine whether to send the upstream data of last transmission again.
Wherein, the method further includes：The base station is that the same HARQ- wireless networks of each UE distribution in the network face
When identify RNTI；
The described base station, to the upstream data HARQ message of each UE newly-increased DCI formats sent, also carries on ePDCCH
Crc value, the crc value be when by default CRC algorithm operation, by the HARQ-RNTI that this base station is each UE distribution into
Row scrambling obtains；
When any UE receives the message of the newly-increased DCI format of base station transmission, by presetting CRC algorithm operation
When, the HARQ-RNTI scramblings distributed by the base station obtain crc value, when the crc value of acquisition is the same as the newly-increased DCI lattice received
The crc value carried in the message of formula is identical, determines that the message of the newly-increased DCI format received is upstream data HARQ message.
The length of the upstream data HARQ message for the newly-increased DCI format that the base station is sent, with the DCI lattice not comprising CRC
Formula is that the length of the message of DCI format 0/1A or DCI format 3/3A is identical.
In conclusion the application is sent on ePDCCH to each UE by base station increases Downlink Control Information DCI format newly
Upstream data HARQ message, when any UE receives the upstream data HARQ message of the newly-increased DCI format of base station transmission, according to
The base station is the HARQ-index of this UE distribution, and corresponding HARQ command informations are obtained in upstream data HARQ message, and
Determined whether to send the last upstream data sent again according to the HARQ command informations of acquisition.It is realizing to upstream data
When HARQ information indicates, expense is small, and is changed to consensus standard small.
Description of the drawings
Fig. 1 is the flow diagram of the method for the HARQ information instruction to upstream data in the specific embodiment of the invention.
Specific implementation mode
To make the objectives, technical solutions, and advantages of the present invention more comprehensible, develop simultaneously embodiment referring to the drawings, right
Scheme of the present invention is described in further detail.
A kind of method of the HARQ information instruction to upstream data is proposed in the embodiment of the present invention, is set applied to including user
It is standby（UE）In the network based on NCT of base station, which sends to each UE on ePDCCH and increases Downlink Control Information DCI lattice newly
The upstream data HARQ message of formula, when any UE receives the upstream data HARQ message of the newly-increased DCI format of base station transmission,
According to the HARQ-index that the base station is this UE distribution, corresponding HARQ instructions letter is obtained in upstream data HARQ message
Breath, and according to the HARQ command informations of acquisition determine whether to send the upstream data of last transmission again.It is realizing to uplink
When the HARQ information instruction of data, expense is small, and is changed to consensus standard small.
Below in conjunction with the accompanying drawings, how to be realized in the present invention will be described in detail specific embodiment and the HARQ information of upstream data is referred to
Show.
Referring to Fig. 1, Fig. 1 is that the flow of the method for the HARQ information instruction to upstream data in the specific embodiment of the invention is shown
It is intended to.The specific steps are：
Step 101, the base station in the network sends to each UE on ePDCCH and increases the upper of Downlink Control Information DCI format newly
Row data HARQ message, upstream data HARQ message are taken on the corresponding positions HARQ-index that this base station is that each UE is distributed
HARQ command informations with each UE.
The base station is that each UE distributes different HARQ-index in network, and it is corresponding with HARQ command informations to be used to refer to UE
Relationship.The HARQ instruction messages of each UE are filled into as this by base station when sending the upstream data HARQ message for increasing DCI format newly
On the corresponding positions HARQ-index of UE distribution.
The HARQ-index distributed for each UE is sent to each UE by base station by RRC signaling, is implemented in agreement
The process that TPC-index is sent to UE by base station is identical, here no longer illustrated in greater detail.
EPDCCH is for carrying uplink and downlink scheduling information and up and down power control information.Downlink Control Information
（DCI）Format（format）It is divided into following several：DCI format0、DCI format1、DCI format1A、DCI
Format1B, DCI format1C, DCI format1D, DCI format2, DCI format2A, DCI format3 and DCI
Format3A etc..Wherein, DCI format0 are used to indicate the scheduling of PUSCH；DCI format1、DCI format1A、DCI
The different transmission mode of format1B, DCI format1C and DCI format1D for the PDSCH of single transport block；DCI
Format2 and DCI format2A are used for the different transmission mode of space division multiplexing；DCI format3, DCI format3A are used for
The transmission of the power control instruction of PUCCH and PUSCH.
Newly-increased DCI format in the present embodiment, which is base station and UE, can identify, and different with already present DCI format
DCI format, such as DCI format 5.
Step 102, when any UE receives the upstream data HARQ message of the newly-increased DCI format of base station transmission, according to
The base station is the HARQ-index of this UE distribution, and corresponding HARQ command informations are obtained in upstream data HARQ message, and
Determined whether to send the last upstream data sent again according to the HARQ command informations of acquisition.
It is this UE by base station when any UE receives the upstream data HARQ message of the newly-increased DCI format of base station transmission
It is the HARQ command informations that this UE is sent that the corresponding positions of the HARQ-index of distribution within the message, which obtain base station,.The instruction is believed
Breath generally includes the information of 1 bit, is ACK instructions or NACK instructions for identifying.If that mark is ACK instructions, this UE
The upstream data of last transmission need not be sent again；It is instructed if it is NACK, this UE needs to send last transmission again
Upstream data.
The base station can also be that each UE in the network distributes same HARQ-RNTI, for calculating cyclic redundancy check
Code（Cyclic Redundancy Check, CRC）When value, scrambled by the HARQ-RNTI of distribution.
The base station, to the upstream data HARQ message of each UE newly-increased DCI formats sent, also carries CRC on ePDCCH
Value, the crc value are added by the HARQ-RNTI that this base station is each UE distribution when by default CRC algorithm operation
Disturb acquisition.
The basic principle of CRC is：Splicing R check codes again after K information codes, entire code length is N, because
This, this coding is also named（N, K）Code.It is given for one（N, K）Code can prove that there are a highest power be N-K=R
Multinomial G (x).The check code of K information can be generated according to G (x), and G (x) is called the generator polynomial of this CRC code.
The specific generating process of check code is：It is indicated with message polynomial C (X) assuming that sending information, C (x) is moved to left R, then it can table
The R powers of C (x) * x are shown as, the right of such C (x) will vacate R, and here it is the positions of check code.Pass through the R of C (x) * 2
The remainder that power divided by generator polynomial G (x) are obtained is exactly check code.
Base station will be sent to each UE by frame structure for the identical HARQ-RNTI that UE is distributed, and specific implementation process is the same as hair
The process for sending TPC-PUCCH-RNTI, is not detailed herein.
When any UE receives the message of the newly-increased DCI format of base station transmission, when by default CRC algorithm operation,
The HARQ-RNTI scramblings distributed by the base station obtain crc value, when the crc value of acquisition is the same as the newly-increased DCI format received
The crc value carried in message is identical, determines that the message of the newly-increased DCI format received is upstream data HARQ message.It is real in this way
Now, it can determine that the message of the CRC formats is upstream data HARQ message as early as possible.
Base station send newly-increased DCI format upstream data HARQ message length, be with the DCI format not comprising CRC
The length of the message of DCI format 0/1A or DCI format 3/3A is identical, can reduce blind Detecting number.
In conclusion base station sends newly-increased Downlink Control Information on ePDCCH to each UE in the specific embodiment of the invention
The upstream data HARQ message of DCI format, the upstream data HARQ that any UE receives the newly-increased DCI format of base station transmission disappear
It is the HARQ-index that this UE is distributed according to the base station when breath, obtaining corresponding HARQ in upstream data HARQ message refers to
It enables information, and determines whether according to the HARQ command informations of acquisition to send the upstream data of last transmission again.By increasing
New DCI format is introduced in strong control channel, the position of existing ePDCCH can be flexibly utilized by send the upper of each UE
The HARQ information of row data.When realizing that the HARQ information to upstream data indicates, expense is small, and is changed to consensus standard small.
The foregoing is only a preferred embodiment of the present invention, is not intended to limit the scope of the present invention.It is all
Within the spirit and principles in the present invention, any modification, equivalent replacement, improvement and so on should be included in the protection of the present invention
Within the scope of.
Claims (2)
1. a kind of method of hybrid automatic repeat-request HARQ information instruction to upstream data, is applied to include user equipment (UE)
In the network based on non-backward compatible carrier waves NCT of base station, which is characterized in that the base station in the network is that each UE distribution is different
HARQ- index index, including：
The base station sends to each UE on enhancing Physical Downlink Control Channel ePDCCH and increases the upper of Downlink Control Information DCI format newly
Row data HARQ message, upstream data HARQ message are taken on the corresponding positions HARQ-index that this base station is that each UE is distributed
HARQ command informations with each UE；
It is this UE according to the base station when any UE receives the upstream data HARQ message of the newly-increased DCI format of base station transmission
The HARQ-index of distribution obtains corresponding HARQ command informations in upstream data HARQ message, and according to acquisition
HARQ command informations determine whether to send the upstream data of last transmission again；
Wherein, the method further includes：The base station is that the same HARQ- wireless networks of each UE distribution in the network are marked temporarily
Know RNTI；
The described base station, to the upstream data HARQ message of each UE newly-increased DCI formats sent, also carries CRC on ePDCCH
Value, the crc value are added by the HARQ-RNTI that this base station is each UE distribution when by default CRC algorithm operation
Disturb acquisition；
When any UE receives the message of the newly-increased DCI format of base station transmission, when by default CRC algorithm operation,
The HARQ-RNTI scramblings distributed by the base station obtain crc value, when the crc value of acquisition is the same as the newly-increased DCI format received
The crc value carried in message is identical, determines that the message of the newly-increased DCI format received is upstream data HARQ message.
2. according to the method described in claim 1, it is characterized in that,
The length of the upstream data HARQ message for the newly-increased DCI format that the base station is sent is with the DCI format not comprising CRC
The length of the message of DCI format 0/1A or DCI format 3/3A is identical.
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| CN106302276B (en) * | 2015-05-29 | 2019-12-06 | 展讯通信（上海）有限公司 | Mobile terminal and received signal processing system and method thereof |
| US10575210B2 (en) | 2015-10-30 | 2020-02-25 | Qualcomm Incorporated | Cyclic redundancy check length management |
| US10693596B2 (en) | 2016-12-01 | 2020-06-23 | Telefonaktiebolaget Lm Ericsson (Publ) | Downlink HARQ feedback transmission |
| CN108809525A (en) * | 2017-05-04 | 2018-11-13 | 株式会社Ntt都科摩 | HARQ-ACK feedback methods, HARQ-ACK extracting methods, base station and user equipment |
| CN110192369B (en) * | 2017-12-28 | 2022-06-03 | 北京小米移动软件有限公司 | Method and device for transmitting hybrid automatic repeat request information |
| CN111756495B (en) * | 2019-03-28 | 2022-12-13 | 华为技术有限公司 | HARQ feedback control method and related equipment |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102687452A (en) * | 2009-09-28 | 2012-09-19 | 高通股份有限公司 | Control information signaling |
| CN102792600A (en) * | 2010-01-11 | 2012-11-21 | 捷讯研究有限公司 | System and method for control channel interference management and extended PDCCH |
| CN104125045A (en) * | 2013-04-25 | 2014-10-29 | 上海贝尔股份有限公司 | Method for transmitting ACK/NACK messages |
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| US8531962B2 (en) * | 2008-04-29 | 2013-09-10 | Qualcomm Incorporated | Assignment of ACK resource in a wireless communication system |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102687452A (en) * | 2009-09-28 | 2012-09-19 | 高通股份有限公司 | Control information signaling |
| CN102792600A (en) * | 2010-01-11 | 2012-11-21 | 捷讯研究有限公司 | System and method for control channel interference management and extended PDCCH |
| CN104125045A (en) * | 2013-04-25 | 2014-10-29 | 上海贝尔股份有限公司 | Method for transmitting ACK/NACK messages |
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