动态TDD技术HARQ时序冲突的解决方案

张刚; 刘是枭; 姜炜; 胡恒

doi:10.11959/j.issn.1000−0801.2017078

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动态TDD技术HARQ时序冲突的解决方案

研究与开发 | 更新时间：2024-06-05

- 动态TDD技术HARQ时序冲突的解决方案
- Solution of HARQ timing collision in dynamic TDD technology
- 电信科学 2017年33卷第5期页码：46-54
- 作者机构：
- 作者简介：
  
  [ "张刚（1976−），男，重庆邮电大学通信与信息工程学院副教授、硕士生导师，主要研究方向为混沌保密通信和微弱信号检测。" ]
  [ "刘是枭（1992−），男，重庆邮电大学通信与信息工程学院硕士生，主要研究方向为LTE-Advanced Pro/5G LAA技术、HARQ技术。" ]
  [ "姜炜（1992−），男，重庆邮电大学通信与信息工程学院硕士生，主要研究方向为LTE-Advanced Pro/5G LAA 技术、干扰协调技术。" ]
  [ "胡恒（1992−），男，重庆邮电大学通信与信息工程学院硕士生，主要研究方向为5G中的V2X技术以及D2D技术。" ]
- 基金信息：
- DOI：10.11959/j.issn.1000−0801.2017078
  中图分类号： TN929.5
- 网络出版日期：2017-05，
  
  纸质出版日期：2017-05-15
- 稿件说明：
移动端阅览
张刚, 刘是枭, 姜炜, 等. 动态TDD技术HARQ时序冲突的解决方案[J]. 电信科学, 2017,33(5):46-54.

Gang ZHANG, Shixiao LIU, Wei JIANG, et al. Solution of HARQ timing collision in dynamic TDD technology[J]. Telecommunications science, 2017, 33(5): 46-54.
张刚, 刘是枭, 姜炜, 等. 动态TDD技术HARQ时序冲突的解决方案[J]. 电信科学, 2017,33(5):46-54. DOI： 10.11959/j.issn.1000−0801.2017078.

Gang ZHANG, Shixiao LIU, Wei JIANG, et al. Solution of HARQ timing collision in dynamic TDD technology[J]. Telecommunications science, 2017, 33(5): 46-54. DOI： 10.11959/j.issn.1000−0801.2017078.

摘要

动态TDD技术的引入不仅能够很好地解决突发性业务需求增长较快的问题，还能提升小区通信系统的服务质量。在动态TDD系统中，无线帧配置可以通过系统中的负载量来改变。但是一些子帧可能会在重配后改变传输方向，导致一些HARQ进程出现时序冲突，影响系统性能。为了解决动态TDD系统中的HARQ时序冲突问题，提出了一种基于过渡无线帧的混合自动重传方案。当重配周期到来时，在重配点后增加一个过渡无线帧，使得HARQ时序以一种较简单、时序冲突较少的方式过渡到重配后的无线帧。在LTE系统仿真平台上建立HARQ模型进行性能验证，仿真结果表明，所提方案能有效地提升系统资源利用率，并给系统平均吞吐量带来增益。

Abstract

Dynamic TDD system was introduced to satisfy the increasing business requirement and improve the sys-tem performance.In the dynamic TDD system

the frame configuration can be changed based on the traffic load.Since some subframes may change their transmission direction after reconfiguration

some HARQ process will be-come useless.In order to solve the collision problem of HARQ timing in dynamic TDD system

hybrid automatic re-transmission scheme based on transitional radio frame was proposed.A radio frame will be added after the reconfi-guration point.HARQ timing can transit to the reconfigured frame in a simple way with few collisions.Performance evaluation was provided to show the effectiveness of the scheme.Using the proposed scheme can bring benefits to the system average throughput and improve the system resource utilization rate.

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references

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