DAI indication method, user terminal and network side device

A technology for network-side equipment and user terminals, which is applied in the field of communication and can solve problems such as errors

Active Publication Date: 2019-08-02
DATANG MOBILE COMM EQUIP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Embodiments of the present invention provide a DAI indication method, a user terminal and a netw...

Method used

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  • DAI indication method, user terminal and network side device
  • DAI indication method, user terminal and network side device
  • DAI indication method, user terminal and network side device

Examples

Experimental program
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example 1

[0131] Assume that the base station configures two carriers for the user terminal. Carrier 1 (CC1) is CBG-based PDSCH transmission with a CBG size of 2, both of which are scheduled by non-fallback DCI; carrier 2 (CC2) is TB-based PDSCH transmission. Such as image 3 As shown, the C-DAI and T-DAI on carrier 1 only count the number of PDSCHs scheduled on carrier 1. For example, if PDSCH transmission is scheduled in slot n, slot n+2 and slot n+3, then The C-DAI and T-DAI included in the DCI in slot n are 0, the C-DAI and T-DAI included in the DCI in slot n+2 are 1, and the C-DAI and T-DAI included in the DCI in slot n+3 are 2. In this embodiment, the DCI on carrier 1 may not include the T-DAI information field, but only include the C-DAI information field. C-DAI and T-DAI on carrier 2 only count the number of PDSCHs scheduled on carrier 2. For example, if PDSCH transmission is scheduled in slot n+1, slot n+2 and slot n+3, then slot n The C-DAI and T-DAI included in the DCI in ...

example 2

[0133] Assuming that the base station configures two carriers for the user terminal, carrier 1 (CC1) is CBG-based PDSCH transmission, the size of CBG is 2, PDSCH transmission in slot n+2 is scheduled by fallback DCI, and carrier 2 (CC2) is TB-based PDSCH transmission. Such as Figure 4 As shown, the C-DAI and T-DAI of the non-fallback DCI on carrier 1 only count the number of PDSCHs scheduled by the non-fallback DCI on carrier 1, for example, non-fallback in slot n and slot n+3 If the DCI schedules PDSCH transmission, the C-DAI and T-DAI included in the DCI in slot n are 0, and the C-DAI and T-DAI included in the DCI in slot n+3 are 1. In this embodiment, the DCI on carrier 1 may not include the T-DAI information field, but only include the C-DAI information field. The C-DAI and T-DAI on carrier 2 count the number of PDSCHs scheduled on carrier 2 and the PDSCH transmissions scheduled by fallback DCI on carrier 1, such as slotn+1, slot n+2 and slot on carrier 2 PDSCH transmi...

example 3

[0135] Assuming that the base station configures three carriers for the user terminal, carrier 1 (CC1) is CBG-based PDSCH transmission, and the CBG size is 2, all of which are scheduled by non-fallback DCI; carrier 2 (CC2) is TB-based PDSCH transmission; Carrier 3 (CC3) is CBG-based PDSCH transmission, and the CBG size is 4, all of which are scheduled by non-fallback DCI. Such as Figure 5 As shown, if cross-slot scheduling is used, the C-DAI and T-DAI on carrier 1 and carrier 3 count the PDCCH sequence corresponding to the PDSCH scheduled on carrier 1 and 3. For example, carrier 1 is in slot n, PDSCH transmission is scheduled in slot n+2 and slot n+3, carrier 3 schedules PDSCH transmission in slot n+1, slot n+2 and slot n+3, then carrier 1 is in slot n in the corresponding DCI of PDSCH (in The C-DAI and T-DAI included in slot n-1) are 0, the C-DAI and T-DAI included in the DCI corresponding to the PDSCH in slot n+1 of carrier 3 are 1, and the carrier 1 is in slot n+2 The DC...

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Abstract

Embodiments of the present invention provide a DAI indication method, a user terminal and a network side device. The method comprises: a user terminal receives a DCI sent by a network side device, theDCI comprises a DAI, wherein if the DCI is used for scheduling physical downlink shared channel (PDSCH) transmission which performs HARQ-ACK feedback based on a transmission block (TB), the DAI onlycounts PDSCH transmission which performs HARQ-ACK feedback based on the TB; if the DCI is used for scheduling PDSCH transmission for HARQ-ACK feedback based on a code block group CBG, the DAI only counts PDSCH transmission for HARQ-ACK feedback based on the CBG;; the user terminal determines a sent HARQ-ACK feedback codebook according to the DAI.. The embodiment of the invention can ensure the correctness of the dynamic codebook under the condition that two sub-codebooks are used for feedback, thereby ensuring the reliable performance of the system.

Description

technical field [0001] The present invention relates to the field of communication technologies, and in particular to a downlink assignment index (Downlink AssignmentIndex, DAI) indication method, user terminal and network side equipment. Background technique [0002] In the 5G New Radio (NR) system, two sub-codebooks are supported for Hybrid Automatic Repeat request Acknowledgment (HARQ-ACK) feedback, for example: Acknowledgment (ACK) or negative response (Negative-Acknowledgment, NACK). However, among the two sub-codebooks, one corresponds to the HARQ-ACK feedback based on the transport block (Transport Block, TB), and the other corresponds to the HARQ-ACK feedback based on the code block group (Code Block Group, CBG). [0003] In addition, the DAI in the existing downlink control information (Downlink Control Information, DCI) is defined based on all carriers configured by the user terminal, specifically refers to within the feedback window, specifically refers to increa...

Claims

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Application Information

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IPC IPC(8): H04L5/00H04L1/18H04W72/04H04W72/12
CPCH04L5/0055H04L1/1812H04L1/1861H04W72/0453H04W72/23H04L1/18H04W72/04H04W72/12H04L5/00H04L1/16
Inventor 司倩倩高雪娟
Owner DATANG MOBILE COMM EQUIP CO LTD
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