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Transmission method and device for uplink control information

A technology of control information and transmission method, applied in the field of communication, can solve the problems of increasing the ACK/NACK feedback delay, increasing the delay of the access network equipment retransmitting data, and delaying the transmission of NACK1, so as to improve the transmission flexibility, The effect of reducing the feedback delay

Active Publication Date: 2020-12-22
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For example, if figure 1 As shown, the terminal can generate NACK1 corresponding to PDSCH1 at the starting symbol position of uplink slot 2, but since NACK1 needs to be jointly coded with ACK2 corresponding to PDSCH2 to be fed back, the transmission of NACK1 is delayed; and the access network device only The retransmission data of PSDCH1 can only be sent after receiving the jointly coded information of NACK1 and ACK2 (that is, figure 1 PSDCH1ReTX in
It can be seen that the joint coded transmission of ACK / NACK information in the same time slot will reduce the flexibility of ACK / NACK transmission and may increase the feedback delay of ACK / NACK. Further, when NACK is delayed and fed back, it will also cause The delay of data retransmission by access network equipment increases, which is not conducive to the terminal to carry out ultra-reliable and low latency communications (Ultra-reliable and low latency communications, URLLC) business

Method used

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  • Transmission method and device for uplink control information
  • Transmission method and device for uplink control information
  • Transmission method and device for uplink control information

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0104] Example 1: Single carrier scenario

[0105] see Figure 5 , the access network device sends PDCCH1 at the first PDCCH detection opportunity on time slot n, and sends PDCCH2 at the second PDCCH detection opportunity. PDCCH1 is used to schedule PDSCH1, and ACK / NACK1 triggered by PDSCH1 is fed back on time slot n+k. PDCCH2 is used to schedule PDSCH2, and ACK / NACK2 triggered by PDSCH2 is fed back on time slot n+k. DAI in PDCCH1 counter The value is 00, and the value of ARI is 000. DAI in PDCCH2 counter The value is 01, and the value of ARI is 000. The terminal correctly parses PDCCH1 and misses PDCCH2. The access network device sends PDCCH3 at the first PDCCH detection opportunity of time slot n+1, and sends PDCCH4 at the second PDCCH detection opportunity. PDCCH3 is used to schedule PDSCH3, and ACK / NACK3 triggered by PDSCH3 is fed back on time slot n+k. PDCCH4 is used to schedule PDSCH4, and ACK / NACK4 triggered by PDSCH4 is fed back on time slot n+k. DAI in PDCCH3...

example 2

[0109] Example 2: Multi-carrier scenario

[0110] see Figure 6 , the access network device sends PDCCH1 to the terminal on CC1 and sends PDCCH2 to the terminal on CC2 at the first PDCCH detection opportunity of time slot n. PDCCH1 is used to schedule PDSCH1, and ACK / NACK1 triggered by PDSCH1 is fed back on time slot n+k. PDCCH2 is used to schedule PDSCH2, and ACK / NACK2 triggered by PDSCH2 is fed back on time slot n+k. DAI in PDCCH1 counter The value is 00, DAI tatal The value is 01, and the value of ARI is 000. DAI in PDCCH2 counter The value is 01, DAI tatal The value is 01, and the value of ARI is 000. The terminal correctly parses PDCCH1 and misses PDCCH2. The access network device sends PDCCH3 on CC1 and PDCCH4 on CC2 at the second PDCCH detection opportunity of time slot n. PDCCH3 is used to schedule PDSCH3, and ACK / NACK3 triggered by PDSCH3 is fed back on time slot n+k. PDCCH4 is used to schedule PDSCH4, and ACK / NACK4 triggered by PDSCH4 is fed back on time sl...

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Abstract

The present application provides a method and device for transmitting uplink control information, which relate to the field of communication technology and are used to reduce the feedback delay of ACK / NACK. The method includes: the terminal receives a PDCCH, the PDCCH is used to schedule a PDSCH, and the PDCCH includes a first PDCCH set and a second PDCCH set; then, the terminal generates a first codebook and a second codebook, and the first codebook corresponds to the first PDCCH set, the second codebook corresponds to the second PDCCH set, and the first PDCCH set and the second PDCCH set correspond to different values ​​of PDCCH codebook identification information; finally, the terminal sends the first codebook and / or the second codebook. This application is applicable to the process of feeding back ACK / NACK.

Description

technical field [0001] The present application relates to the technical field of communications, and in particular to a method and device for transmitting uplink control information. Background technique [0002] Hybrid Automatic Repeat reQuest (HARQ) is a technology formed by combining Forward Error Correction Coding (FEC) and Automatic Repeat reQuest (ARQ). FEC enables the receiving end to correct some errors by adding redundant information, thereby reducing the number of retransmissions. For errors that cannot be corrected by FEC, the receiving end will request the sending end to resend data through the ARQ mechanism. Specifically, if the receiving end can correctly parse the data sent by the sending end, the receiving end returns an acknowledgment (Acknowledgment, ACK) to the sending end. If the receiving section cannot correctly parse the data sent by the sending end, the receiving section returns a negative acknowledgment (Negative ACKnowledgment, NACK) to the sending...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L5/00H04L25/03H04W72/04H04W72/12
CPCH04L5/0055H04L1/1607H04L1/1812H04W72/23H04L25/03H04L1/1854H04L5/0053H04L5/0078H04L5/0091H04L27/2602H04L1/1896H04W72/21H04B7/0456H04W72/0446H04W72/1273H04W72/56
Inventor 李胜钰官磊马蕊香邵家枫吕永霞
Owner HUAWEI TECH CO LTD