Method and device for reporting channel quality indicator

A channel quality indication and channel quality technology, applied in wireless communication, shaping network in transmitter/receiver, error prevention/detection using return channel, etc., can solve the complicated process of bit rate calculation and affect the reliability of HSDPA service And high efficiency, CQI reported value can not reach the optimal and other issues

Inactive Publication Date: 2009-09-02
ST ERICSSON SEMICON BEIJING
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Problems solved by technology

[0006] However, the above-mentioned reporting method of the CQI value in the prior art still has the disadvantages that the code rate calculation process is complicated and the method calculation is not accurate enough, so that the CQI reporting value cannot reach the optimum, thus affecting the reliability and high efficiency of the HSDPA service.

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  • Method and device for reporting channel quality indicator
  • Method and device for reporting channel quality indicator
  • Method and device for reporting channel quality indicator

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Embodiment Construction

[0060] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0061] The CQI reporting method and device described in the specific embodiments of the present invention establish a code rate table through pre-experimental simulation, and establish the mapping between channel quality and code rate through the code rate table. During the calculation process of the CQI report value, according to the current channel quality Quality characterization values ​​(such as signal-to-interference ratio and / or signal-to-noise ratio) are directly looked up in the code rate table to obtain the code rate estimate, without complicated code rate calculations, and then a series of precise calculations and adjustments are performed based on the code rate estimate The optimal data for CQI reporting can be determined, the method is s...

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Abstract

The invention discloses a method and a device for reporting a channel quality indicator, applying to a TD-HSDPA system. The method comprises the steps: a current quality token value of the channel quality to be measured is obtained, the current quality token value is compared with a modulation mode threshold value to confirm an optimal modulation mode reported by the current CQI; an optimal code rate under the current quality token value is searched in a code rate table according to the current quality token value; the size estimating values of transmitting blocks are calculated according to the optimal code rate, a transmitting block index value is read from a transmitting block table according to the transmitting block size estimating values; the transmitting block index value is regulated according to the current demodulation data result, a comparison result of a current quality token value and the channel quality threshold value and / or a comparison result of the transmitting block index value and the last time CQI reporting index value and a transmitting block index input value reported by the current CQI is obtained; and the transmitting block index input value and the optimal modulation mode are output. The reporting process is simple and effective and can obtain the optimal CQI reporting parameters.

Description

technical field [0001] The invention belongs to the technical field of wireless communication, in particular to a channel quality indicator (Channel Quality Indicator, CQI) reporting method applied to TD-HSDPA (TimeDivision-High Speed ​​Downlink Packages Access, time division-high speed downlink packet access technology) and its devices. Background technique [0002] In order to meet the growing needs of multimedia services for high-speed data transmission, the third generation mobile communication cooperation project group (3GPP) has announced a new high-speed data transmission technology-HSDPA technology, which makes the function of downlink transmission greatly improved. strengthen. HSDPA has the characteristics of high-speed data transmission and large user capacity. It implements several fast and complex channel control mechanisms, including physical layer short frame, AMC (adaptive modulation and coding), fast hybrid automatic retransmission technology (Hybrid -ARQ, ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W24/10H04L1/00H04L1/16H04L25/03
Inventor 李沛
Owner ST ERICSSON SEMICON BEIJING
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