LTE系统跨层HARQ重传技术研究

Research on the Cross-layer HARQ Retransmission Technology in LTE System

对LTE系统两层重传方案进行了深入的调研、仿真和分析,在此基础上提出基于RLC子层的跨层HARQ优化方案,并从系统框架、传输格式、资源分配和HARQ流程四个方面进行了阐述.该方案充分利用HARQ与ARQ之间的共享信息,使得不同QoS需求的数据可以独立的进行发送,不仅改善了系统吞吐率和业务时延,提高了物理资源的使用效率,而且更好地保障了多业务的QoS.

This article does some investigation, simulation and analysis work on LTE retransmission scheme. Proposed the cross-layer HARQ retransmission scheme based on RLC sub-layer including system architecture, transportation format, scheduling and HARQ workflow of the scheme. The cross-layer HARQ retransmission scheme makes full use of sharing information between HARQ and ARQ to make data with different quality of service to be transmitted independently. By using this scheme the LTE system can not only increases system throughput, decreases traffic delay and improves resource utilization efficiency, but also guarantees the quality of service of multiple traffic.