摘要
从LTE系统底层协议入手,结合具体实现,对随机接入过程进行了详细设计,并对随机接入过程所涉及的具体问题进行了研究,包括PRACH时频资源的计算、响应信息的时序接收、上行传输的时序控制以及异常情况下的处理及方案设计,最后利用规范说明与描述语言(SDL)和树表结合表示法(TTCN)仿真,产生消息顺序图(MSC)。仿真结果表明,该设计满足协议一致性规范。
According to LTE underlying layer protocol, the random access procedure is designed, specific issues involved in the design are studied, including computation of PRACH frequency resources, response information receiving, uplink transmission timing control as well as handling abnormal situations and program design. The corresponding design flow is given. And the MSC （Message Sequence Chart） is produced using SDL （Specification and Description Language） and TFCN （Tree Tabular Combined Notation） co- simulation. The simulation resuh shows that the design meets the conformance requirement of specification.
出处
《电讯技术》
北大核心
2010年第9期78-81,共4页
Telecommunication Engineering
基金
国家科技重大专项项目(2009ZX03002-009)~~
