摘要
为提高LEO(low earth orbit)卫星通信系统中系统的信道利用率,在小区用户分布不均匀的前提下,基于动态分配预留保护信道DCRS(dynamic channel reservation scheme)的方法,提出了一种适合于LEO卫星通信系统的信道分配策略。该策略能根据系统中切换呼叫和新呼叫的比例,动态地分配预留的保护信道。仿真结果表明,与传统的固定分配预留保护信道FCRS(fixed channel reservation scheme)的策略相比,在保证一定切换呼叫阻塞概率的情况下,该策略能有效地降低新呼叫阻塞概率,提高信道利用率和系统的QoS(quality of service)。
In order to increase the channel utility in assignment strategy in LEO communication system LEO satellite communication system, a new channel based on DCRS （dynamic channel reservation scheme） was proposed in light of the unequal distribution of the subscribers. The strategy can assign the guarded channel dynamically according to the proportion of the new calls and handoff calls. The simulation results show that the strategy QoS while guaranteeing scheme）. can reduce the new call blocking probability, improve the channel utilization and the handoff blocking probability compared with FCRS （fixed channel reservation scheme）.
出处
《解放军理工大学学报（自然科学版）》
EI
2007年第1期1-4,共4页
Journal of PLA University of Science and Technology(Natural Science Edition)
基金
国家自然科学基金资助项目(60472051)
