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HARQ-ACK feedback information sending method

A technology of feedback information and channels, applied in signaling distribution, wireless communication, transmission path sub-channel distribution, etc., can solve problems such as adjacent frequency interference

Active Publication Date: 2019-03-01
BEIJING SAMSUNG TELECOM R&D CENT +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0014] In fact, when the frequency domain distance between multiple CCs performing carrier aggregation is large enough, these CCs can adopt different uplink and downlink configurations without interfering with each other; in addition, in some cases, the phase frequency of each CC may Different uplink and downlink configurations have been deployed (for example, adjacent frequencies are different TD-SCDMA configurations), at this time, if the same uplink and downlink configurations continue to be used for these CCs, serious adjacent frequency interference will occur. Therefore, in LTE In the follow-up research of -A, an important topic is to study how to effectively support the case where the uplink and downlink configurations of multiple CCs of carrier aggregation are different

Method used

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  • HARQ-ACK feedback information sending method

Examples

Experimental program
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Effect test

Embodiment 1

[0130] Assume that the base station configures two CCs for the CA UE, namely the primary CC and the secondary CC. The primary CC adopts TDD uplink and downlink configuration 2, and the secondary CC adopts TDD uplink and downlink configuration 5. Under this combination, the HARQ- For the ACK timing relationship, refer to the HARQ-ACK timing relationship under their respective TDD uplink and downlink configurations. The bundling window of the primary CC includes subframes {4,5,6,8}, the size of the bundling window is 4, and the bundling window of the secondary CC includes subframes {9,0,1,3,4,5,6,7, 8}, the size of the bundling window is 9, and the UL Grant of scheduling PUSCH is sent on subframe 8 of the secondary CC, assuming W DAI UL =3. This case belongs to case 2 in method 1.

[0131] The main CC is TDD uplink and downlink configuration 2, then the B of this CC c DL equal to min{W DAI UL ,M c}=min{3,4}=3, assuming that the primary CC is in SIMO transmission mode, th...

Embodiment 2

[0149] Assume that the base station configures two CCs for the CA UE, namely the primary CC and the secondary CC. The primary CC adopts TDD uplink and downlink configuration 2, and the secondary CC adopts TDD uplink and downlink configuration 5. Under this combination, the HARQ- For the ACK timing relationship, refer to the HARQ-ACK timing relationship under their respective TDD uplink and downlink configurations. The bundling window of the primary CC includes subframes {4,5,6,8}, the size of the bundling window is 4, and the bundling window of the secondary CC includes subframes {9,0,1,3,4,5,6,7, 8}, the size of the bundling window is 9, and the UL Grant of scheduling PUSCH is sent on subframe 8 of the secondary CC, assuming W DAI UL =1. This situation belongs to situation 2 in method 2, assuming that formula (1) is used for calculation.

[0150] The main CC is TDD uplink and downlink configuration 2, then the B of this CC c DL equal to min{(W DAI UL +4*ceiling((U-W D...

Embodiment 3

[0161] Assume that the base station configures two CCs for the CA UE, namely the primary CC and the secondary CC. The primary CC adopts TDD uplink and downlink configuration 2, and the secondary CC adopts TDD uplink and downlink configuration 5. Under this combination, the HARQ- For the ACK timing relationship, refer to the HARQ-ACK timing relationship under their respective TDD uplink and downlink configurations. The bundling window of the primary CC includes subframes {4,5,6,8}, the size of the bundling window is 4, and the bundling window of the secondary CC includes subframes {9,0,1,3,4,5,6,7, 8}, the size of the bundling window is 9, and the UL Grant of scheduling PUSCH is sent on subframe 8 of the secondary CC, assuming W DAI UL =1. This case belongs to case 2 in method 2.

[0162] The main CC is TDD uplink and downlink configuration 2, then the B of this CC c DL equal to M c = 4, assuming that the primary CC is in the SIMO transmission mode, then the number of bit...

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Abstract

The invention provides an HARQ-ACK feedback information sending method, which is used for a situation that TDD uplink and downlink configurations of a plurality of component carriers (CC) in a carrieraggregation (CA) configured by UE are different. The method comprises the steps that the UE receives a PDCCH and a PDSCH sent by a base station; the UE, according to one or a combination of more thanone of the received PDCCH, a downlink assignment index (UL DAI) acquired from uplink grant (UL Grant) of the PDCCH, a sum of the number of PDSCH subframes received in an HARQ-ACK binding window and the number of PDCCHs for indicating downlink semi-persistent scheduling (SPS) release, and the size of the HARQ-ACK binding window, determines the number of downlink subframes of sending HARQ-ACK feedback information in a physical uplink shared channel (PUSCH) of a current uplink subframe by each CC; and the UE sends the HARQ-ACK feedback information of each CC in the PUSCH of the current uplink subframe, wherein the number of bits of the HARQ-ACK feedback information of each CC is determined according to the number of the downlink subframes. By applying the method, correct HARQ-ACK feedback information transmission can be performed in a CA system in which the uplink and downlink configurations of the CCs are different; the waste of PUSCH resources is avoided; and the situation that the uplink and downlink configurations of the CCs of the CA are different can be effectively supported.

Description

[0001] This application is a divisional application of the invention patent application with the application number "201210218451.3" and the invention title "A Method for Sending HARQ-ACK Feedback Information". technical field [0002] The present application relates to wireless communication system technology, in particular to a method for sending HARQ-ACK feedback information. Background technique [0003] The Long Term Evolution (LTE) system supports two duplex modes of Frequency Division Duplex (FDD) and Time Division Duplex (TDD). figure 1 It is the frame structure of the TDD system. The length of each radio frame is 10ms, which is equally divided into two half-frames with a length of 5ms. Each half-frame contains 8 time slots with a length of 0.5ms and 3 special domains, namely downlink pilot time slot (DwPTS), guard interval (GP) and uplink pilot time slot (UpPTS), these 3 special domains The sum of the lengths is 1ms. Each subframe consists of two consecutive time...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L5/00H04W72/04
CPCH04L1/1607H04L1/1812H04L1/1854H04L1/1861H04L5/0055H04L1/187H04L1/1893
Inventor 付景兴李迎阳孙程君
Owner BEIJING SAMSUNG TELECOM R&D CENT
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