A connection handover protocol for LEO satellite ATM networks
MobiCom '97 Proceedings of the 3rd annual ACM/IEEE international conference on Mobile computing and networking
A wireless broadband ad-hoc ATM local-area network
Wireless Networks
A distributed routing algorithm for datagram traffic in LEO satelitte networks
IEEE/ACM Transactions on Networking (TON)
Low Earth Orbital Satellites for Personal Communication Networks
Low Earth Orbital Satellites for Personal Communication Networks
ATM-based routing in LEO/MEO satellite networks with intersatellite links
IEEE Journal on Selected Areas in Communications
Topological dynamics characterization for LEO satellite networks
Computer Networks: The International Journal of Computer and Telecommunications Networking
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The provision of guaranteed services in low earth orbit (LEO) satellite networks is rather complicated due to the mobility of satellites. Users may be handed-off from one spot beam to another and/or from one satellite to another frequently during the lifetime of their calls. Traffic on inter-satellite links (ISLs) incident on a particular satellite change as the user traffic served by the satellite changes due to satellite mobility. The variation of user traffic over the ISLs may cause violation of quality of service (QoS) requirements of ongoing connections. We propose a novel protocol which we call the predictive routing protocol (PRP), which exploits the deterministic nature of the LEO satellite topology to maximize the total number of users served by the system, while maintaining each user's QoS requirements. PRP predicts the traffic load on the ISLs up to a short time in the future by using the deterministic knowledge of the LEO satellite topology and user location information. PRP determines multiple paths for a particular connection that effectively help avoid possible future bottlenecks as predicted by estimated future traffic on the ISLs. The protocol is compared with other non-predictive routing protocols such as IP routing by simulations and it is shown that PRP can deliver deterministic QoS guarantees (such as delay or delay jitter), without over-reserving channel bandwidth. An admission control curve has also been obtained which may be used to limit the number of users in order to ensure that the desired QoS metrics may be guaranteed.