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Method for operating HARQ buffer

A buffer and message technology, applied in the direction of using the return channel for error prevention/detection, network traffic/resource management, digital transmission system, etc., can solve problems such as waste of resources

Active Publication Date: 2009-08-12
ALCATEL LUCENT SHANGHAI BELL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But if the UE continues to keep the HARQ buffer up to the maximum retransmission limit in any case, it causes a waste of resources

Method used

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  • Method for operating HARQ buffer

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Embodiment Construction

[0016] Preferred embodiments of the present invention will be described below with reference to the accompanying drawings. In the following description, details and functions unnecessary to the present invention are omitted in order to prevent confusing understanding of the present invention.

[0017] figure 1 It shows the operation process of eNode B and UE in the first situation according to the embodiment of the present invention. Such as figure 1 As shown, in the first case, the eNode B only sends an ACK message on the PHICH, but does not send a PDCCH message, that is, a control command, to the current UE.

[0018] In step S10, the eNode B sends the HARQ ACK to the UE on the PHICH. In step S11, the UE maintains its HARQ buffer and stops its own transmission in response to the reception of the HARQ ACK. Then, the UE monitors the PDCCH message, that is, judges whether the PDCCH message is received within a predetermined duration. Since no PDCCH is sent to the UE, the UE...

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Abstract

The invention discloses a method for operating a HARQ buffer. The method comprises the following steps: receiving HARQACK; responding to the reception of the HARQACK to maintain the HARQ buffer; and under a condition that the PDCCH message is not received in a stated duration period, emptying the HARQ buffer or continuously maintaining the HARQ buffer until a PDCCH message is received or until the number of retransmission times reaches a maximum. By the method, resource waste caused by continuously maintaining the HARQ buffer can be avoided, and possible impact of data transmission can be avoided.

Description

technical field [0001] The present invention relates to wireless communication, in particular to a method for operating a HARQ (Hybrid Automatic Repeat Request) buffer in an LTE (Long Term Evolution) system, which can be used after a UE (User Equipment) receives a HARQ ACK (HARQ Acknowledgment) The control of the HARQ buffer is optimized. Background technique [0002] In LTE system, when UE only receives HARQ ACK on PHICH (HARQ Feedback Indication Channel) without any PDCCH message, UE needs to keep its HARQ buffer. However, if the UE continues to keep the HARQ buffer up to the maximum retransmission limit under any circumstances, it will cause waste of resources. Therefore, it is necessary to seek an optimized HARQ buffer control method. Contents of the invention [0003] The present invention has been accomplished in view of the problems existing in the prior art. The purpose of the present invention is to propose a method for operating a HARQ buffer, which can optimi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L1/18H04W28/04H04L45/50
CPCH04L45/50H04L45/04H04L1/1896H04L2001/125H04L1/1877H04L1/188H04L1/1812H04W28/04
Inventor 杨涛安东尼拉·范尼沃诺
Owner ALCATEL LUCENT SHANGHAI BELL CO LTD
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