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1、HandlingAddressingandMobilityinHybridWirelessMeshNetworksTIKReport250OlgaBondareva,RainerBaumannComputerEngineeringandNetworksLaboratorySwissFederalInstituteofTechnologyETH-Zentrum,Switzerland{bondareva,baumann}@tik.ee.ethz.chAbstractToparticipateincom
2、munication,anetworknoderequiresanaddress.Inwiredcomputernetworksanodereceivesitsaddressaccordingtothehierarchicalcontext.Incontrasttowirednetworks,WirelessMeshNetworkshaveflattopology,sincenodesarefreetomoveandcreatehighlychangeablecontext.Besides,Wire
3、lessMeshNetworksshouldsupportmobilityofnodes.BymergingofhierarchicalwirednetworksandflatwirelessnetworksinHybridWirelessMeshNetworks,anaddressallocationschemeshouldmeetthedemandsofbothwiredandwirelessdomains,andmoreover,mobilitysupportshouldbeintroduce
4、d.InthisreportwedefinetheproblemofaddressallocationandmobilitysupportinHybridWirelessMeshNetworks.Wereviewandevaluatethesolutionspresentedintheliteratureandalsoanalyzetheproblemofmobilitydetectionmoreclosely.1IntroductionAddressallocationisnecessarytoe
5、nablepacketexchangebetweennetworksnodes.TraditionalwiredIPnetworkshavehierarchicaladdressspace,whereanaddressnotonlyidentifiesanodeinthenetwork,butalsoenableslocationofanodeinthehierarchicaltopology.Thepurposeofaddressallocationschemesinhierarchicalwir
6、ednetworksistoassigneverynodeauniqueandtopologicallycorrectidentifier.IncontrasttofixedwiredIPnetworks,WirelessMeshNetworks(WMNs)areself-configuringnetworksconsistingofmobilenodesinterconnectedbywirelesslinks.WMNsbynaturehaveflatandchangingtopology,sin
7、cemobilenodesarefreetomove.Instand-aloneWMNswithflataddressspace,addressonlyidentifiesanodewithinthenetwork.Furthermore,sincenodesinWMNaremobile,mobilityshouldbesupported.Thus,thepurposeofaddressallocationschemesistoassigneverynodeauniqueidentifierwith
8、inaWMNdisregardingtopologicalcorrectness,butmobilityshouldbeconsidered.TheproblemofaddressingandmobilitysupportariseswhenaWMNwithflataddressesconnectstotheInternet.Inthiscase,mobilityshouldbesupportedanditisdesirabletokeepthesameaddress
