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Data transmission method, user equipment, base station and data transmission system

A data transmission method and a technology of user equipment, applied in digital transmission systems, transmission systems, error prevention/detection using return channels, etc., can solve problems such as occupying memory and increasing conversion processing, and achieve the effect of saving memory occupation

Active Publication Date: 2010-04-28
SHANGHAI HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] For the above implementation process, the inventors of the present invention found the following defects in the existing implementation methods: for eNodeB, eNodeB MAC needs to cache the corresponding relationship between TB numbers and codeword numbers of all TBs that UE needs to receive, that is, it takes up A certain amount of memory, and after receiving the ACK or NACK fed back by the UE, it is necessary to convert the codeword number to the TB number, thus increasing the conversion process from the codeword number to the TB number

Method used

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  • Data transmission method, user equipment, base station and data transmission system
  • Data transmission method, user equipment, base station and data transmission system
  • Data transmission method, user equipment, base station and data transmission system

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Embodiment Construction

[0037] Below we will describe in detail the implementation of the embodiment of the present invention with reference to the accompanying drawings.

[0038] see figure 1 , is a flow chart of a data transmission method provided in the embodiment of the present invention. The base station in the embodiment of the present invention may be an evolved base station or a traditional base station, etc. This embodiment is not limited, and the method includes:

[0039] Step 101: the base station determines the corresponding relationship between the TB number and the codeword number of the TB that the UE needs to receive;

[0040] Step 102: The base station sends downlink control messages DCI and TB to the user equipment, wherein the DCI includes: the corresponding relationship between the TB number and the codeword number of the TB that the UE needs to receive;

[0041] Step 103: The base station receives a positive acknowledgment ACK or a negative acknowledgment NACK message fed back by ...

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Abstract

The invention relates to a data transmission method, user equipment, a base station and a data transmission system, and the method comprises the following steps: determining the corresponding relationship between TB number and code word number of the user equipment; sending downlink control messages of DCI and TB to the user equipment, wherein the DCI comprises the corresponding relationship between the TB number of the TB which needs to be received by the UE and the code word number; receiving a confirmation ACK message or a negation NACK message fed back by the user equipment, wherein, the ACK or the NACK comprises cyclic redundancy check CRC results of various TB; and confirming the receiving state to the TB according to the CRC results of the various TB. The invention can reduce the TB number-code word number conversion problem in the prior art, as well as the problem that as a network side caches the corresponding relationship between the TB number of the TB which needs to be received by all UE and the code word number, a memory is occupied.

Description

technical field [0001] The present invention relates to the field of communication technology, and in particular to a data transmission method, user equipment, base station and data transmission system. Background technique [0002] In a Long Term Evolution (LTE, Long Term Evolution) system, a Hybrid Automatic Repeat Request (HARQ, Hybrid Automatic Repeat Request) technology is a key physical process in the LTE system. Wherein, HARQ includes downlink HARQ and uplink HARQ. The process of HARQ includes: when the receiver successfully parses the received transport block (TB, Transport Block), send a positive confirmation (ACK, Acknowledgment) to the sender; Send a negative acknowledgment (NACK, Negative Acknowledgment). If the sender receives ACK, release the buffered TB; if the sender receives NACK, retransmit the buffered TB. [0003] At present, in the existing data transmission method, it mainly involves the processing process of downlink HARQ, mainly including: [0004...

Claims

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Application Information

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IPC IPC(8): H04L1/16H04L1/18H04L1/00
Inventor 郑中亮张杰
Owner SHANGHAI HUAWEI TECH CO LTD
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