Method for mixing automatic request retransmission

A hybrid automatic and retransmission technology, applied in transmission systems, digital transmission systems, error prevention, etc., can solve problems such as inability to increase or decrease retransmission, and inability to determine correct decoding, reducing the number of retransmissions and ensuring Decoding performance, the effect of improving system performance
CN1925382BActive Publication Date: 2010-06-16ZTE CORP
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Patent Information

Authority / Receiving Office
CN ยท China
Patent Type
Patents(China)
Current Assignee / Owner
ZTE CORP
Publication Date
2010-06-16

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Abstract

This invention discloses one mixture automatic re-send method, which comprises the following steps: generating one wait transmission sequence mapping list at Node B end and processing mapping on sequence on signal to noise proportion by certain rules; user device receive end generates feedback identification information according crc test results, wherein, the identification information comprises:expressing codes error then needing re-send; or expressing codes result is right then without re-send; the said Node B is based on the user device feedback codes information and current signal quality.
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Description

technical field

[0001] The invention relates to a method for automatically requesting retransmission in the field of digital mobile communication, in particular to a hybrid automatic retransmission (HARQ hybrid ARQ) method when TD-CDMA and WCDMA systems provide HSDPA services. Background technique

[0002] HSDPA is a modulation and demodulation algorithm proposed by 3GPP in the R5 protocol to meet the asymmetrical requirements of uplink / downlink data services. It is an important technology for improving downlink capacity and data service rate in the later stage of WCDMA and TD-SCDMA network construction. In order to increase the downlink packet data rate and reduce the time delay, HSDPA mainly adopts Adaptive Coding and Modulation (AMC), Fast Hybrid Automatic Repeat (HARQ), Fast Cell Selection (FCS) and fast scheduling technologies.

[0003] HARQ technology can improve system performance, and can flexibly adjust the effective coding rate, and can also compensate for bit erro...

Claims

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