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Transmission method and device based on communication channel activation detection

A technology of channel activation and transmission method, applied in the field of uplink hybrid automatic retransmission HARQ processing, can solve problems such as packet loss and HARQ failure, and achieve the effect of reducing packet errors and improving resource utilization.

Active Publication Date: 2014-08-06
ZTE CORP
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Problems solved by technology

[0007] The purpose of the present invention is to provide a transmission method and device based on channel activation detection, which solves the problem of HARQ failure caused by UE missing DCI0 in the prior art, which in turn leads to packet loss

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  • Transmission method and device based on communication channel activation detection
  • Transmission method and device based on communication channel activation detection
  • Transmission method and device based on communication channel activation detection

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Embodiment Construction

[0043] The preferred embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described below are only used to illustrate and explain the present invention, and are not intended to limit the present invention.

[0044] LTE uplink HARQ is to solve uplink transmission error packets. Uplink transmission needs to rely on DCI0 to indicate scheduling resources to UE, but if there is large interference in the downlink channel, or for some other reasons, UE loses DCI0 sent by the base station, so It will eventually lead to the failure of the uplink HARQ, resulting in packet errors. In the present invention, DCI0 activation detection is performed on the base station side to determine whether the UE loses DCI0, and if DCI0 is lost, the base station side maintains the RV value according to certain rules. If not missing, update the RV value. For HARQ retransmission in IR ad...

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Abstract

Disclosed in the present invention are a transmission method and apparatus based on channel activation detection, relating to the field of communications. The method comprises: a base station issuing to a terminal scheduling information containing scheduling resource indication, for enabling the terminal to send service data; the base station receiving the service data uploaded by the terminal; the base station verifying the service data; in the event of a verification error, the base station judging whether the scheduling information is lost by using the service data; and the base station performing HAQR (Hybrid Automatic Repeat request) mode decision processing and HARQ retransmission processing by using a judgment result, for controlling the terminal to perform HARQ retransmission according to a processing result. By adopting the transmission method and apparatus disclosed by the invention, Long Term Evolution (LTE) uplink packet error can be reduced, and the resource utilization rate of a physical downlink control channel (PDCCH) can be effectively improved.

Description

technical field [0001] The invention relates to the communication field, in particular to an uplink hybrid automatic retransmission HARQ processing technology in a long-term evolution LTE system. Background technique [0002] In the LTE system, in order to improve the system performance in coverage-constrained scenarios, HARQ is often used, and HARQ can be specifically divided into incremental redundancy (Incremental Redundancy, IR) adaptive mode and soft combination (Chase Combining, CC) mode and IR non-adaptive mode. [0003] For the CC mode, the feature is that the retransmitted data is exactly the same as the previously sent packet data, and there is only one redundant version. The receiving end performs soft combination of the retransmitted data and the stored data before decoding. [0004] For the IR mode, the first newly transmitted data contains all the information. After the receiving end cyclic redundancy check (Cyclic Redundancy Check, CRC) is wrong, the error pa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L1/18H04W28/04
CPCH04L1/18H04L1/1812H04W72/12H04W28/04
Inventor 宁涛涛谷成金杨琼
Owner ZTE CORP
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