Method and device for transmitting acknowledgement message

A technology for acknowledging information and transmitting frames, which is applied in the direction of error prevention/detection using the return channel, and can solve problems such as waste of resources, failure to indicate the actual number of DL subframes, and ACK/NACK errors

Active Publication Date: 2014-11-12
ALCATEL LUCENT SHANGHAI BELL CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Regarding the Physical Downlink Shared Channel (PDSCH) HARQ feedback issue, for a UE configured for HARQ transmission via Physical Uplink Control Channel (PUCCH) format 1a / 1b / 1b with channel selection or PUCCH3, in The ACK / NACK bundling size M determined after TDD UL-DL reconfiguration may not indicate the actual number of transmitted DL subframes, thus it may cause ACK / NACK errors or ACK / NACK resource waste
[0003] In TDD e IMTA, when the TDD UL-DL configuration is changed due to traffic adaptation, the timing conflict of HARQ / scheduling may occur

Method used

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  • Method and device for transmitting acknowledgement message
  • Method and device for transmitting acknowledgement message
  • Method and device for transmitting acknowledgement message

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Embodiment Construction

[0024] Exemplary embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0025] It should be understood that these exemplary embodiments are given only to enable those skilled in the art to better understand and realize the present invention, but not to limit the scope of the present invention in any way.

[0026] In the LTE TDD system, the uplink and downlink transmissions are not necessarily symmetrical. Therefore, in a configuration where there are more downlink subframes than uplink subframes, confirmation information of multiple downlink subframes may be reported simultaneously in one uplink subframe. Therefore, technologies such as HARQ-ACK bundling or multiplexing are used in the prior art. The number of acknowledgments reported in an uplink subframe depends on the configuration of the LTE uplink and downlink.

[0027] Specifically, for user equipment using PUCCH1a / 1b / 1b with CS, in the current 3GPP TS36.213...

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Abstract

The invention provides a method and device for transmitting an acknowledgement message. The method comprises the steps that one or more transmission frames are received from a base station through user equipment; whether the current configuration of the received current transmission frame is changed or not relative to the configuration of the last transmission frame is judged; if the current configuration of the received current transmission frame is not changed relative to the configuration of the last transmission frame, the binding size (M) used for transmitting the acknowledgement message is determined according to the current configuration of the current transmission frame; if the current configuration of the received current transmission frame is changed relative to the configuration of the last transmission frame, the reference configuration is selected according to the configuration of the last transmission frame and the configuration of the current transmission frame, and the binding size (M') used for transmitting the acknowledgement message is determined based on the current configuration, the configuration of the last transmission frame and the reference configuration; the format of a physical uplink control channel used for transmitting the acknowledgement message is determined at least based on the binding size (M) and the binding size (M'); the acknowledgement message is transmitted through the determined format of the physical uplink control channel, and the acknowledgement message comprises one of positive acknowledgement (ACK) and negative acknowledgement (NCK).

Description

technical field [0001] The present invention relates to wireless communication systems, and more particularly, to a method and apparatus for transmitting acknowledgment information in a Long Term Evolution Time Division Duplex (LTE TDD) system. Background technique [0002] In the recent 3rd Generation Partnership Project (3GPP) meeting, the new Enhanced Downlink-Uplink (DL-UL) Interference Management and Traffic Adaptation (eIMTA) for LTE TDD has been approved. Work projects. In this work item, the HARQ (Hybrid Automatic Repeat Request) / scheduling issue is still one of the key issues listed in Reference [1]. Regarding the HARQ / scheduling conflict problem, a detailed solution has been proposed in Reference [2]. Regarding the Physical Downlink Shared Channel (PDSCH) HARQ feedback issue, for a UE configured for HARQ transmission via Physical Uplink Control Channel (PUCCH) format 1a / 1b / 1b with channel selection or PUCCH3, in The ACK / NACK bundling size M determined after TDD ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L1/16
Inventor 孙芳蕾
Owner ALCATEL LUCENT SHANGHAI BELL CO LTD
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