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Mapping method from the calculated value of transmission format combination to the indication of transmission format combination

A technology of transmission format combination and mapping method, applied in transmission systems, digital transmission systems, data representation error detection/correction, etc., and can solve problems such as decoding performance degradation

Inactive Publication Date: 2003-08-20
HUAWEI TECH CO LTD
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Problems solved by technology

The TFCI obtained according to the current mapping method from CTFC to TFCI has a range of mapping values ​​from 0 to m-1, where m is the number of CTFCs. In fact, the range of TFCI available at the physical layer may be much larger than 0 to m-1. Due to the current The mapping method does not make full use of this information, so that TFCI encoding leads to a decline in decoding performance

Method used

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  • Mapping method from the calculated value of transmission format combination to the indication of transmission format combination
  • Mapping method from the calculated value of transmission format combination to the indication of transmission format combination

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Embodiment Construction

[0025] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.

[0026] In a communication system, the general high-level needs to map certain information to the corresponding information of the physical layer. In actual situations, the mapped information of the high-level changes, sometimes more, sometimes less, but the physical layer needs to provide enough mapping. Information, so that when there is more mapped information at the high level, a mapping relationship can also be established between the mapped information and the mapped information. In this way, when there is less information to be mapped at the high layer, the optimal combination of information can be selected at the physical layer, and then a mapping relationship between the two can be established.

[0027] Based on the above facts, in the mapping from CTFC to TFCI, it is assumed that the coding scheme of TFCI is (n, k) linear block code, ...

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Abstract

A mapping method of calculation value of transmission format combination to indication of transmission format combination includes to form TFCI set by m number of different TFCI selected out from 2k(0-2k-1) number of TFCI, calculating code minimum distance after each TFCI set having been coded and to search maximum value of code minimum distance from above said code distance as well as to index out TFCI set according to subscript of maximum value of code minimum distance, making ascending order arrangement of TFCI in TSi of TFCI set and setting up a mapping relationship between CTFC and TFCI according to ascending order one by one correspondingly. It is able to make decoding performance optimum because the code minimum distance is maximum after selected TFCI set has been coded.

Description

technical field [0001] The invention relates to a coding method in a code division multiple access (CDMA) mobile communication system, in particular to a mapping method from a calculated value of a transmission format combination (CTFC) to a TFCI in the coding process of transmission format combination indication (TFCI) data. Background technique [0002] The transport format combination indicator (TFCI) is used to indicate the format of the code combination transport channel (CCTrCH), and the corresponding TFCI is usually defined by the radio resource control layer (RRC) according to the calculated value of CTFC. According to the third generation mobile communication cooperation organization (3GPP) agreement 3GPP TS 25.331V3.6.0 (2001-06), the calculation formula of CTFC is as follows: CTFC ( TFI 1 , TFI 2 , K ,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03M13/03H04L1/00
Inventor 刘华斌
Owner HUAWEI TECH CO LTD
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