摘要
提出一种适用于LEO(低轨道)星座通信系统的信道分配方案。该方案为切换呼叫提供了保留信道,降低了切换呼叫的阻塞概率。同时,采取新呼叫排队策略抑制保留信道引起的新呼叫阻塞概率的恶化,如果正在进行的呼叫离开,队列中的新呼叫可以按照次序获得分配信道。结果表明,该方案可以显著降低切换呼叫阻塞概率,并使新呼叫阻塞概率得到改善。
A channel assigning scheme which was adapted to LEO constellation communication system was proposed. The scheme provided reserved channel for handover call to reduce blocking probability of handoff call.Meanwhile, new call queuing strategy was adopted to restrain new call balockage deterioration caused by reserving scheme. When there was a departure of ongoing call, new call in queue could obtain channel assigning priority-ranked. It is shown that the scheme can reduce the handoff call blocking probability observably, and new call blocking probability is improved at the same time.
出处
《通信学报》
EI
CSCD
北大核心
2006年第9期135-140,共6页
Journal on Communications
基金
国家自然科学基金资助项目(60472051)~~
关键词
卫星通信
卫星星座
信道
切换
statellite communication
satellite constellation
channel
handoff
