摘要
提出了一种适用于长期演进(LTE)系统多播广播单频网传输方式的自适应资源分配机制,考虑多播业务的资源需求和信道情况决定每个子帧上传输的业务类型.在每个资源分配周期内,通过估计系统内多播业务所需的子帧比例,选定相应的信干噪比门限;通过门限判决并考虑多播业务所需资源分配情况,自适应地实现多播业务和单播业务间的子帧分配.仿真结果表明,所提机制在保证多播业务速率的同时,可以提高单播业务吞吐量,优化了系统无线资源的利用率。
In the LTE systems, the multicast and broadcast single frequency network （MBSFN） transmission mode is defined for multimedia services. An adaptive resource allocation scheme for LTE systems with MBSFN transmission mode is proposed, in which the sub-frame is allocated according to the required radio resource of multicast traffic and the channel condition. In each resource allocation interval, the sub-frame ratio required by the multicast traffic is estimated and then a single plus interference and noise ratio threshold is given based on the estimated sub-frame ratio; the sub-frame is allocated adaptively to the multicast traffic or the unicast traffic based on the threshold decision and the allocated resource of the multicast traffic as well. Simulation results show that the proposed scheme can guarantee the data rate of the multicast traffic and improve the throughput of the unicast traffic, so the radio resource utility of the system is optimised.
出处
《西安电子科技大学学报》
EI
CAS
CSCD
北大核心
2012年第5期126-131,191,共7页
Journal of Xidian University
基金
国家科技重大专项资助项目(2010ZX03003-001-01)
中央高校基本科研业务费专项资金资助项目
关键词
长期演进系统
多播广播单频网
多播业务
资源分配
LTE
multicast and broadcast single frequency network
multicast traffic
resource allocation
