摘要
在空间复用时分多址(STDMA)的海上船舶无线自组网中,提出了一种支持业务区分的分布式STDMA协议,即区分服务统一时隙分配协议(DS-USAP).通过搜集两跳内邻居节点的时隙状态信息,为具有不同服务等级的业务动态申请不同数量的时隙,并且采用冲突检测和处理机制解决拓扑变化造成的时隙冲突.仿真结果表明:DS-USAP具有高效的时隙复用率,能够区分不同的业务并为之提供不同的服务;在10 m/s速度下,q=3时的业务流吞吐量是固定时隙TDMA业务流吞吐量的4.8倍,比GA-STDMA业务流吞吐量高近50%.
A distributed spatial time division multiple access （STDMA） protocol called differentiated service-unifying slot assignment protocol（DS-USAP） was proposed which could adapt to different traffics by assigning them different amount of slots. DS-USAP could dynamically apply slots for a flow by collecting the information of two-hop away neighbors of a node. By utilizing the conflict detection and conflict resolve mechanism, DS-USAP could detect and resolve the slot conflicts caused by nodes movement. Simulation results show that the slot reuse efficiency of DS-USAP is high. DS-USAP can provide different service for different traffic. The network throuput of DS-USAP is 4.8 times of fixed slot TDMA, while the speed is 10 m/s and q=3, and about 50% more than GA-STDMA.
出处
《华中科技大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2010年第1期77-80,共4页
Journal of Huazhong University of Science and Technology(Natural Science Edition)
基金
船舶工业科技预研基金资助项目
关键词
无线自组网
时分多址
业务区分
分布式空间复用时分多址
动态分配
动态拓扑
Ad hoc networks
time division multiple access（TDMA）
differentiated service
distributed spatial-TDMA
dynamic allocation
dynamic topology
