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Method for sending HARQ-ACK feedback information

A technology for feedback information and channels, applied in signaling allocation, transmission path sub-channel allocation, digital transmission system, etc., and can solve problems such as adjacent frequency interference

Active Publication Date: 2014-01-15
BEIJING SAMSUNG TELECOM R&D CENT +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0013] 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 are 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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  • Method for sending HARQ-ACK feedback information
  • Method for sending HARQ-ACK feedback information
  • Method for sending HARQ-ACK feedback information

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0129] 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.

[0130] 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

[0147] 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 case 2 in method 2, assuming that formula (1) is used for calculation.

[0148] 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 DAI U...

Embodiment 3

[0158] 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.

[0159] 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 bits...

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Abstract

The invention provides a method for sending HARQ-ACK feedback information. The method for sending the HARQ-ACK feedback information is applied to the situation that a plurality of CCs in CA arranged on EU are different in TDD uplink downlink configuration. The method comprises the steps that (1) a PDCCH and a PDSCH which are sent by a base station are received by the UE; (2) according to one or a combination of the received PDCCH, a ULDAI obtained from UL Grant of the PDCCH, the sum of the number of PDSCH sub frames received in an HARQ-ACK binding window and the number of PDCCHs used for indicating downlink SPS to release and the size of the HARQ-ACK binding window, the number of downlink sub frames, sending the HARQ-ACK feedback information in a PUSCH of a current uplink sub frame, of each CC is determined by the UE; (3) the HARQ-ACK feedback information of each CC is sent by the UE on the PUSCH of the current uplink sub frame and the bit number of the HARQ-ACK feedback information of each CC is determined according to the number of the downlink sub frames. According to the method for sending the HARQ-ACK feedback information, correct HARQ-ACK feedback information transmission in a CA system with the CCs different in uplink and downlink configuration can be conducted, waste of PUSCH resources is avoided, and the situation that the CCs of the CA are different in the uplink and downlink configuration can be effectively supported.

Description

technical field [0001] The present application relates to wireless communication system technology, in particular to a method for sending HARQ-ACK feedback information. Background technique [0002] 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 slots, that is, the kth subframe includes time slot 2k and time slot 2k+1. The TDD system supports seven different TDD uplink and downlink configurations, as shown in Table 1. In Table 1, D represents a downlin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L1/18
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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