Handover and Channel Allocation Mechanisms in Mobile Satellite Networks

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dc.contributor.advisorTassiulas, Leandrosen_US
dc.contributor.authorKoutsopoulos, Iordanisen_US
dc.contributor.departmentISRen_US
dc.contributor.departmentCSHCNen_US
dc.date.accessioned2007-05-23T10:08:53Z
dc.date.available2007-05-23T10:08:53Z
dc.date.issued1999en_US
dc.description.abstractIn this work we study first handover prediction in non-geostationary mobile satellite networks. The ultimate choice of the transition path depends on UT position and signal strength. We investigate the procedure of beam monitoring and propose UT maximum residence as the criterion for path selection. <p>The UT must operate both in full- and half-duplex mode, the latter being desirable when power limitations are imposed. We propose a scheme that achieves this goal and guarantees efficient diversity provision. Constant delay contours on the earth's surface are defined. The problem of reliable time delay acquisition is addressed, in case synchronization is lost. The SBS solves that either by using the known estimate of UT position or by requesting a measurement report by the UT. <p>The problem of channel allocation appears in cellular networks of every kind. Calls arising in the cell overlap area have access to channels of more than one base station and may choose which base station they will use to establish connection. In that case the problems of base station and channel assignment arise jointly. <p>We address the problem in a linear cellular network and aim at the minimumnumber of utilized channels. We present two algorithms: The first one expands Load Balancing in clique populations and is Sequential Clique Load Balancing (SCLB). The second one is named Clique Load Balancing with Inverse Water-Filling (CLB-IWF). In a dynamic environment, we unify SCLB and CLB-IWF into CLB-DA, which comprises Dynamic Allocation. CLB-DA is compared with Least Loaded Routing (LLR) policy and with Random Routing policy. We finally deduce that at light loads CLB-DA outperforms LLR, attaining smaller blocking probability, whereas at heavier loads all three policies converge.en_US
dc.format.extent879917 bytes
dc.format.mimetypeapplication/pdf
dc.identifier.urihttp://hdl.handle.net/1903/6109
dc.language.isoen_USen_US
dc.relation.ispartofseriesISR; MS 1999-15en_US
dc.relation.ispartofseriesCSHCN; MS 1999-10en_US
dc.subjectnetwork managementen_US
dc.subjectmobile satellite networksen_US
dc.subjecthandoveren_US
dc.subjectsynchronizationen_US
dc.subjecthalf-duplex connectionen_US
dc.subjectresource managementen_US
dc.subjectchannel allocationen_US
dc.subjectblocking probabilityen_US
dc.subjectIntelligent Signal Processing and Communications Systemsen_US
dc.titleHandover and Channel Allocation Mechanisms in Mobile Satellite Networksen_US
dc.typeThesisen_US

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