LTE系统MAC复用实体研究与设计  

Research on and Design of LTE System MAC Multiplexing Entity

作　　者：冯川[1] 李小文[1] 

机构地区：[1]重庆邮电大学通信与信息工程学院,重庆400065

出　　处：《电讯技术》2010年第10期98-102,共5页Telecommunication Engineering

基　　金：国家科技重大专项项目(2009ZX03002-009)~~

摘　　要：从LTE系统MAC层协议入手,结合具体实现,对复用实体进行了详细研究,并对复用涉及的逻辑信道优先级、各个无线承载资源配置的具体问题进行了分析,完成复用过程设计。为了使低优先级的承载也有获得数据传输的机会,采用令牌桶算法,通过限定每个承载对应令牌桶中的令牌数量,完成各个承载的资源分配,避免了高优先级的数据无限承载(DRB)独占资源,即按照Prioritised Bit Rate(PBR)、Bucket Size Duration(BSD)的数据量,匹配各个逻辑信道的传输量,达到有效复用的目的,并按照测试要求,对测试例进行分析,复用算法得到进一步验证,也和协议规范相一致,达到预期的设计效果。According to LTE MAC layer protocol and combining realization, the multiplexing entity is detailed, the logical channel prioritization and allocation of radio resource are analysed, and the design of multiplexing process is completed. In order to make the lower priority carrier have the service chance, with token bucket algorithm, by limiting the number of tokens in corresponding token bucket for each host, the allocation of resources in various hosts is realized, thus avoiding the endless high-prlority data bearer（DRB） exclusive resources, that is, in accordance with the data of PBR（ Prioritised Bit Rate） and BSD（ Bucket Size Duration）, transmission capacity of each logical channel is matched, so as to achieve multiplexing effectively. In accordance with the testing requirements, the test cases are analysed, multiplexing algorithm is further verified and it agrees with the protocol specification. The expected design effect is achieved.

关 键 词：LTE 复用实体 逻辑信道优先级 令牌桶算法 

分 类 号：TN929.5[电子电信—通信与信息系统]