摘要
根据移动终端越区切换的物理过程,结合GEO系统的特点,建立移动终端运动的数学模型,将地面移动通信系统的无优先权、预留信道和排队方案3种信道分配方案应用于GEO系统,进行仿真分析。仿真结果表明,预留信道方案虽然能够降低切换呼损率,但却增加了初始呼叫呼损率;排队混合方案在取得与预留信道方案同样的切换呼损率时,可以获得更低的初始呼叫呼损率,排队混合方案优于预留信道方案。
A mathematical model of terminal movement with handoff procedures is given according to the physical handoff process in GEO system and the current channel allocation procedures such as non-priority scheme,guard channel scheme and queuing scheme are applied to GEO system for simulation analysis.The results show that in channel reservation scheme,although the dropping probability can be reduced,the blocking probability is increased with the number of reserved channel;when achieves the same dropping probability as well as channel reservation scheme,the queuing hybrid scheme can get lower blocking probability.
出处
《无线电通信技术》
2010年第5期1-3,共3页
Radio Communications Technology
