A predictive call admission control scheme for low earth orbit satellite networks

被引:2
作者
Kim, BW
Min, SL
Yang, HS
Kim, CS
机构
[1] Seoul Natl Univ, Sch Comp Sci & Engn, Seoul 151742, South Korea
[2] Hongik Univ, Sch Elect & Elect Engn, Seoul, South Korea
关键词
call admission control; intersatellite link (ISL); link assignment; low ear th orbit (LEO); routing; simulation;
D O I
10.1109/25.901901
中图分类号
TM [电工技术]; TN [电子技术、通信技术];
学科分类号
0808 ; 0809 ;
摘要
In many recent low earth orbit (LEO) satellite networks, intersatellite links (ISLs) are used to enhance the capability of the networks, The ISLs are continuously deleted and established since the visibility between satellites changes over time. These topological changes require rerouting of the traffic on ISLs, which unavoidably involves dropping of some ongoing calls, Tn general, such an ongoing call dropping degrades the quality-of-service (QoS) more severely than an initiated fall blocking In this paper, rye propose a call admission control scheme that allows a flexible tradeoff between dropped ongoing calls and blocked initiated calls. The call admission control scheme makes use of two techniques: traffic recasting and traffic projection. The traffic recasting maps the current traffic onto the network after the topological change whereas the traffic projection projects the recast traffic from the current time to the time of the topological change. The projected traffic is used to estimate the increase in ongoing call dropping whose QoS penalty is compared against that of increased newly initiated call blocking to make the cap admission decision. Simulation results show that the proposed call admission control scheme significantly reduces the ongoing call dropping probability with only a marginal increase in the initiated call blocking and call completion probabilities.
引用
收藏
页码:2320 / 2335
页数:16
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