With Contributions of the following partners (in order of ap(2)

12.2.2.3Modi cationintheaccessfunctions....................

12.2.3802.11MACandchannelcondition..........................

12.2.4Functionalcharacteristicsofan802.11eTraf cScheduler..............

12.3802.11h.............................................

12.3.1ThemotivationofTaskGrouph............................

12.3.2TransmissionPowerControl(TPC)..........................

12.3.3DynamicFrequencySelection(DFS).........................

12.3.3.1Measurements................................

12.3.3.2Selectingachannel.............................

12.3.4APresponsibilitiesunderthenewframework.....................

13Handlingofreal-timeapplications

14PerformanceEvaluationofIEEE802.11

wirelessLANs

14.1Introduction...........................................

14.2Performanceevaluationof802.11anditsa,b,andgvariants.................787879798284868686909292929699999914.3Performanceevaluationof802.11e...............................10515ImprovingtheFairnessandEf ciencyofMACProtocols10915.1Introduction...........................................10915.2IEEE802.11bOverview....................................110

15.2.1RelatedWork......................................11215.3InterferenceAwareMAC....................................11415.4Conclusions...........................................11716WLANLossModelsforMultimediaServices11816.1WLANLossModelsforMultimediaServices.........................118

16.1.1WLANQoSMeasures.................................11816.1.2LossModelsforWLAN................................11816.1.3Conclusion,OpenIssues,andConnectionstoOtherWorkPackages.........12017Connectivityandcoverageproblemsinadhocandsensornetworks(stateoftheart)12117.1Connectivity...........................................12117.2Sensorcoverage.........................................12218MACprotocolsforadhocnetworks12418.1Introduction...........................................12418.2Classi cation..........................................12418.3IEEE802.11featuresandlimitations..............................12518.4Problemsandpossiblesolutions................................127

18.4.1HTPandETPproblem.................................127

A state of the art

18.4.2Blocking,falseblockingandpseudo-deadlock....................12818.4.3Unfairnessintheadhocnetwork............................12818.4.4MobilityandIEEE802.11...............................12918.4.5Multiplefading.....................................12918.4.6Near-farproblemandCDMAenvironment......................12918.4.7Omnidirectionalvs.directionalandsmartantenna..................12918.5Newschemesandtechniques..................................130

18.5.1PowerControlApproaches...............................13018.5.2Randomscheduleapproachandfan-in/outmethodofseedexchange........13118.5.3Multipacketreception(MPR)networks........................13118.5.4TheBlack-Burst(BB)mechanism...........................13218.5.5TheRandomizedInitializationProtocol........................13218.5.6Tree-SplittingApproaches...............................13218.5.7Neighborhoodawarenessprotocols..........................13318.5.8Synchronousatomicbroadcastprotocol........................13318.6Conclusions...........................................13419Energyef cientroutinginadhocnetworks13519.1Introduction...........................................13519.2Researchonenergyef cientrouting..............................13619.3Energyef cientnetworkoperation,combinedapproach....................13719.4Conclusion...........................................13820End-to-EndQoSSupportinAdHocNetworksConnectedtoFixedNetworks

21QualityofServiceforMobileAd-hocNetworks:anOverview139141

21.1Introduction...........................................14121.2Reservation-LessApproaches..................................142

21.2.1Load-BalancingSchemes................................14221.2.2CourtesyPiggybacking.................................14221.2.3SWAN.........................................14221.3Reservation-OrientedApproaches...............................143

21.3.1INSIGNIA.......................................14321.3.2FlexibleQoSModelforMANETs(FQMM)......................14321.3.3CEDAR.........................................14321.3.4QualityofServiceforAdhocOn-DemandDistanceVector..............14421.3.5Canseveretal......................................14421.3.6AdhocQoSon-demandrouting(AQOR).......................14521.4Conclusions...........................................14522PassingCorruptDataAcrossNetworkLayers:AnOverviewofRecentDevelopmentsandIssues14622.1Introduction...........................................14622.2UDPLite............................................14622.3DCCP..............................................147

A state of the art

22.4Issues...................

22.4.1TheLinkLayerPerspective...

22.4.2IPv6................

22.4.3EncryptionandAuthentication..

22.4.4Congestionvs.Corruption....

22.4.5LinkLayerARQConsiderations.

22.5Inter-layerCommunication........

22.5.1TrigTran:CorruptionExperienced

22.5.2Transportprotocoldetection...

22.5.3Otherpossibilities?........

22.6Conclusion................

22.7Acknowledgments............

References154....................................................................................................................................................................................................................................................................................................................................148148148149149150151151151152152153

A state of the art

1.Introduction

Thisdocumentconstitutesthe rstdeliverableofworkpackageJRA2.4onQoSinmultiservicewirelessnet-works,providingastate-of-the-artontherelatedtopics.Thisdeliverablegatherstogetherthecontributionsofthedifferentpartnersinvolved …… 此处隐藏：6337字，全部文档内容请下载后查看。喜欢就下载吧 ……