LTE系统ARQ重传资源重分配  

Reallocation of ARQ retransmission resources in LTE system

作　　者：马康[1] 金杰[1] 苏寒松[1] 李园园[1] 

机构地区：[1]天津大学电子信息工程学院,天津300072

出　　处：《计算机工程与应用》2014年第12期106-110,共5页Computer Engineering and Applications

摘　　要：针对长期演进(LTE)无线链路控制(RLC)层重传协议数据单元(PDU)只允许重分段不允许级联,当媒体接入控制(MAC)层复用模块向RLC层某个业务指示值大于RLC层重传PDU长度时将造成资源的浪费,提出了一种新的复用方案。新方案在获得封装该业务重传PDU需要的资源大小后,指示剩余资源分配给其他业务。这种剩余资源重分配机制中,优先考虑其他重传业务,其次考虑优先级最高的实时业务。对不同复用与调度方法进行仿真,仿真结果表明,新方案有效地提高了资源利用率,大大提高了高优先级的实时业务的吞吐量,明显降低了丢包率。In Long Term Evolution（LTE）system, the retransmission Protocol Data Unit（PDU）of Radio Link Control （RLC）layer can be only re-segmented but not concatenated. The total size indicated by Medium Access Control（MAC） layer might be greater than RLC PDU to be retransmitted, which results in a waste of resources. Based on the above, a new multiplexing scheme is proposed. In this new scheme, after obtaining the resource size a service needs, the remaining resources will be reallocated to other services. The proposed remaining resources reallocation scheme gives priority to other retransmission services, while the real-time service with the highest priority follows. Some simulations have been done based on multiplexing and scheduling algorithms, which show that the new scheme effectively improves resources utilization, highly increases the throughputs of real-time service with high priority and significantly reduces packet loss rate.

关 键 词：长期演进 无线链路控制 媒体接入控制 重传 复用 调度 

分 类 号：TP391.9[自动化与计算机技术—计算机应用技术]