简介:Byintroducingamobilityanchorpoint(MAP),hierarchicalmobileIPv6(HMIPv6)reducesthebindingupdatesignalingcostassociatedwithmobileIPv6,buttherestillexistdeficiencies.Forinstance,amobilenode(MN)needstoorderlyaccomplishtwobindingupdateswiththeMAPandhomeagent(HA)whentheMNperformsinter-MAPmobility.Thisresultsinahighsignalingcost,thusaffectingnetworkperformance.Toreducetheinter-MAPbindingupdatecostofidleMNinHMIPv6,anoptimizationschemebasedonpointerforwardingwithathresholdisproposed.TheschemecanreducesthebindingupdatecostofidleMNbyusingthebindingupdatebetweenMAPtoreplaceseveralhomebindingupdates.Thesignalingcostdifferenceisderivedbyanalyzingthecostofthebasicschemeandtheoptimizationschemebetweentwosuccessivesessions.Simulationresultsshowthat,theoptimizationschemecanreducethebindingupdatesignalingcostandimprovethenetworkperformanceaslongasasuitablethresholdischosen.Thediscussionsonthesensitivityoftele-parametersarealsogiven.
简介:【摘要】 竖井多绳摩擦提升机更换首绳是矿山机电专业大型施工项目,其技术含量高,安全风险大,施工工艺复杂。针对赤峰柴矿提升系统的工况,介绍一种“以旧带新”的首绳更换工艺方法及安全措施,该工艺能极大的减轻换绳工作强度,缩短换绳时间,降低安全风险,取得较好经济效益和社会效益。