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Method for deciding using code of downlink interval and uplink interval in wimax system

A method and interval determination technology, which is applied to the determination field of downlink interval usage codes and uplink interval usage codes in the Wimax system, can solve problems such as difficult trade-offs

Inactive Publication Date: 2007-10-03
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, how to choose 13 kinds of DIUC and 10 kinds of UIUC from more than 40 kinds of downlink burst profile encodings is difficult to weigh

Method used

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  • Method for deciding using code of downlink interval and uplink interval in wimax system
  • Method for deciding using code of downlink interval and uplink interval in wimax system

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Embodiment Construction

[0038] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0039] The present invention proposes a method for determining the code used in the downlink interval and the code used in the uplink interval in the Wimax system. Prior to this, referring to the method in the prior art, it is determined according to the limit on the number of indexes of DIUC and UIUC, the characteristics of the error correction code, and the type of service A candidate error correction code for the base station, and an uplink burst attribute coding table and a downlink burst attribute coding table are generated. The concrete steps of the present invention are then:

[0040] 1. The Wimax system supports a variety of error correction codes, such as CC, ZT CC, CTC, BTC, LDPC, etc. Except CC is mandatory, other error correction codes are optional. After simulation, compare various error correction codes At the same time, due to the limitation o...

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Abstract

A method for confirming downlink interval and uplink interval in Wimax system includes setting uplink sequence table and downlink sequence table and dynamically selecting error correction code and modulation mode as well as coding rate according to current S-N ratio and data flow rate.

Description

technical field [0001] The invention relates to a method for determining the code used in the downlink interval and the code used in the uplink interval in a Wimax system. Background technique [0002] The CDMA (code division multiple access) system specifies nine fixed modulation and coding methods RC1 to RC9. For a certain RCx, its channel coding rate, error correction code, modulation method and coding rate are specified. This kind of fixed configuration processing is relatively simple, but it cannot make full use of different error correction code characteristics and channel conditions to make a flexible choice, which has a certain impact on system performance. [0003] name value FEC Code type and modulation type 0=QPSK(CC)1 / 2 1=QPSK(CC)3 / 4 2=16-QAM(CC)1 / 2 3 = 16-QAM (CC) 3 / 4 4 = 64-QAM (CC) 1 / 2 5 = 64-QAM (CC) 2 / 3 6=64-QAM(CC)3 / 4 7=QPSK(BTC)1 / 2 8=QPSK(BTC)3 / 4 9=16-QAM(BTC)3 / 5 10=16-QAM(BTC)4 / 5 ...

Claims

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Application Information

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IPC IPC(8): H04L1/00
CPCH04L43/16
Inventor 鲁绍贵邱刚
Owner ZTE CORP
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