电信科学 ›› 2013, Vol. 29 ›› Issue (10): 58-64.doi: 10.3969/j.issn.1000-0801.2013.10.011

• 研究与开发 • 上一篇    下一篇

一种应用于实时业务的非恒速码传输策略

赵少华,陈巍,白铂,牛志升,曹志刚   

  1. 清华大学微波与数字通信国家重点实验室 北京100084
  • 出版日期:2013-10-15 发布日期:2017-06-19
  • 基金资助:
    国家重点基础研究发展计划（“973”计划）资助课题;国家重点基础研究发展计划（“973”计划）资助课题;电子信息系统复杂电磁环境效应国家重点实验室开放课题，国家自然科学基金创新研究群体资助课题

A Rateless Code Transmission Strategy Based on Real Time Service

Shaohua Zhao,Wei Chen,Bo Bai,Zhisheng Niu,Zhigang Cao   

  1. State Key Laboratory on Microwave and Digital Communications,Tsinghua University,Beijing 100084,China
  • Online:2013-10-15 Published:2017-06-19

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摘要：

由于具有良好的信道自适应和低反馈数据量的优点，非恒速码有很好的应用前景。然而由于其自身编码的特点会造成数据传输延时，加上其对反馈链路质量的好坏敏感，直接影响了它在实时数据传输业务方面的应用。研究了随机反馈的ACK延时对非恒速编码性能的影响，提出一种新的LT编码实时数据传输策略，以解决传输系统实际反馈链路的非理想状况对通信质量造成的影响，实现了反馈不可靠情况下LT码的实时数据传输。

关键词: 非恒速码, LT编码传输策略, 实时数据传输, 反馈延时

Abstract:

Rateless codes has the advantage of good channel adaptivity with a low amount of feedback data.However,the data transmission delay caused by its own coding characteristics and its sensitivity of the feedback link quality directly affects its application in real-time data transmission services.The random delay of feedback ACK which reduce the LT coding's performance was discussed,and then a new LT code based real-time transmission strategy was proposed to address the impact of non-ideal conditions of the feedback link.This strategy can achieve higher data throughout in non-ideal feedback conditions.

Key words: rateless code, LT code transmission strategy, real-time data transmission service, feedback delay

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