一种新型LTE混合自动重传方案

摘要

In LTE(3G Long Term Evolution), larger TB(Transport Block) occupies more time-frequency resources and is prone to error so as to a waste of resources. In view of this case, a novel transmission scheme of Hybrid Automatic Retransmission Request(HARQ)is proposed. The new transmission scheme takes segmentation based on the TB size in the HARQ entity instead of the segment function of physical layer. Then multiple segment data blocks can be transported parallelly in a single process. If the data are needed to be retransmitted, the transmitter only transports the error segmentation data. Simulation results show that the proposed new transmission scheme is obviously better than the traditional scheme in regard to system throughput and the average number of transmissions.%针对LTE中较大TB（Transport Block）传输时占用较多时频资源且容易出现错误致使资源浪费的情况，提出了一种新型混合自动重传请求（HARQ）传输方案。新型传输方案在HARQ实体内根据TB大小对其进行分段，取消物理层的分段功能，形成单进程下多分段数据块并行传输，在需要重新传输时，仅传输接收检测出错的分段数据即可。仿真结果表明，提出的新型传输方案在系统吞吐量和平均传输次数方面明显优于传统方案。