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Channel quality indicator correction method and device

A technology of channel quality indication and correction method, applied in wireless communication, network flow/resource management, digital transmission system, etc., can solve problems such as inaccuracy and poor real-time performance of CQI, achieve simple design, increase real-time performance and accuracy Sexuality, easy-to-achieve effect

Inactive Publication Date: 2011-06-22
ZTE CORP
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Problems solved by technology

[0010] The present invention provides a method and device for correcting channel quality indication, which overcomes the shortcomings of poor real-time and inaccurate CQI acquisition in the prior art, and corrects CQI by increasing CRC error statistics

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  • Channel quality indicator correction method and device
  • Channel quality indicator correction method and device
  • Channel quality indicator correction method and device

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Embodiment Construction

[0034] The implementation of the present invention will be described in detail below in conjunction with the drawings and examples, so that the realization process of how to use technical means to solve technical problems and achieve technical effects in the present invention can be fully understood and implemented accordingly.

[0035] The core of the present invention involves the following two-part algorithm:

[0036] Such as image 3 As shown, it is a schematic diagram of a method for implementing CQI correction through SNR correction (the schematic diagram does not include details of specific steps, but only explains the scheme as a whole);

[0037] (1) JD (Joint Detection) estimates SNR;

[0038] (2) Perform transmission channel processing, including constellation de-rearrangement, de-interleaving, bit de-scrambling, de-bit combining, de-rate matching (twice), Turbo decoding and other processing processes;

[0039] (3) CRC detection is carried out, and the number of CR...

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Abstract

The invention discloses a channel quality indicator correction method and a channel quality indicator correction device. The method comprises the following steps of: acquiring an estimated receiving signal to noise ratio (SNR), performing cyclic redundancy check (CRC) detection after the processing of a transmission channel, and counting the number of CRC errors; and correcting the SNR according to the number of the CRC errors, and determining a recommended modulation format (RMF) and a recommended transmission block size (RTBS) for reporting according to the corrected SNR; or obtaining an initial transmission block index according to the SNR, correcting the transmission block index according to the number of the CRC errors and determining the RMF and the RTBS for reporting according to the corrected transmission block index. By the method and the device, the real-time and accuracy of channel quality indicator (CQI) reporting can be improved by counting the number of the CRC errors to correct the estimated SNR or the obtained transmission block size; the method and the device are simply designed and convenient to implement; and the receiving SNR or the transmission block index is corrected at two regulation levels so as to achieve control flexibility.

Description

technical field [0001] The invention relates to a method and device for correcting channel quality indication in a mobile communication system, in particular to a method and device for correcting channel quality indication in an HSDPA link of a TD-SCDMA communication system. Background technique [0002] In order to meet the increasing transmission rate requirements, the TD-SCDMA communication system introduces a High Speed ​​Downlink Packet Access (HSDPA) technology. HSDPA includes two main key technologies: hybrid automatic repeat request (Hybrid Auto Repeat Request, HARQ) and adaptive modulation and coding (Adaptive Modulation and Coding, AMC). HARQ technology combines forward error correction coding and automatic retransmission technology. UE (user terminal) detects the received transmission block through CRC (cyclic redundancy coding). If the detection error is detected, it tells the base station to retransmit through the feedback channel For the data packet, the UE co...

Claims

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Application Information

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IPC IPC(8): H04L1/00H04W24/10H04W28/04
Inventor 褚金涛
Owner ZTE CORP
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