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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.
Based on this, a cross-layer HARQ optimization scheme based on RLC sub-layer is put forward. From the aspects of system frame, transmission format, resource allocation and HARQ process, the two-layer retransmission scheme of LTE system is deeply investigated and simulated. The scheme makes full use of the shared information between HARQ and ARQ so that data with different QoS requirements can be sent independently, which not only improves system throughput and service delay, but also improves the efficiency of using physical resources, and more Good protection of multi-service QoS.