td-lte集群通信系统准入控制-研究

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1、重庆邮电大学硕士论文好地保证集群用户的业务接纳率和资源占用率，且避免了持续门限接纳所存在的公网用户持续走低的资源占用率情况。通过matlab仿真可验证所提策略能够保证集群用户较高的接纳率和资源占用率，且对公网用户的接纳性能影响较小。关键词：TD．LTE公网集群系统，准入控制，竞争随机接入控制，退避，PUSCH功率控制，呼叫接纳控制IIAbstract一。———————————————————————————————————————————一Allusersoftheclusterandthepublicsharethe

2、limitedwirelesssystemresources．intheTD．LTEpublicandthinkingsystemClusterusersinitiaterandomaccessprocessorcallserviceswithsuddenandhavegroupcallandfastaccessfeaturesthatpublicusersdon'thave．Thepriorityofclusterusersisoftengreaterthanthepublicusers·Theaccessandad

3、missioncontrolmechanisminthepuclicsystemwillnolongerapplyinthepublicandtrunldngsystem．Researchofaccessandadmissioncontrolmechanismbasedonthepublicandtrunkingsystemisnecessary．Whentheclusterandpublicuserscompetetoaccesssystemrandomly,thecollisionisinevitable．Afte

4、rgivingthecomprehensiveconsiderationtothepriorityofgroups．thepriorityofusersinagroup，thepublicusers，retransmlsslonnumberandne咖rkload，weproposethecompetitionrandomaccesscontrolandbackoffstrategyappliedintheTD—LTEpublicandthinkingsystem．Inthestrategy,allusersthati

5、nitiatetheinitialcompletedrandomaccessusefullprobabilitytoaccessinthecaseoflownet、Ⅳorkload．useprobabilitythatvarywithnetworkload，priorityofgroupsandthepriorityofusersinagrouptoaccessinthecaseofhighnetworkload．Allusersthatinitiatecompletedrandomaccessagainuseprob

6、abilitythatvarywiththeretransmlsslonn啪ber’networkloadandthedifferentprioritytoaccess．Throughthematlabsimulationandanalysis，wecanverifythestrategyinthelargerloadCanguaranteesuccessrateandaccessdelayrequirementsofuserswithhighpriority．Throughanalysis，weknownallthe

7、usersthatcollidewillusethesameresourcetotransmitMs93inthePUSCHinthecontention-basedrandomaccessprocess，PUSCHpowerchangeswiththecollision，thetrunkingsystemhavethegradationfeatureandTD．LTEsystemusetheOFDMtechnology．WeproposeapowercontrolstrategyofPUSCHwherepriorit

8、yuserssendMs93．ThisstrategyisimprovedonthebasisoftheoriginalPUSCHpowercontrolSOthatpowerisnotrelativelyincreasedwiththeincreaseinthenumberofretransmission，butdifferen