11.3 Fast Handover For MObile IPv6 –RFC4068 移动IP技术 教学课件.pptVIP

11.3 Fast Handover For MObile IPv6 –RFC4068 Fast Handover For Mobile IPv6 Rfc4068 Fast Handovers for Mobile IPv6 rfc4066 Candidate Access Router Discovery (CARD) rfc4067 Context Transfer Protocol (CXTP) rfc5268 Mobile IPv6 Fast Handovers Specified security association between the MN and its Access Router in the companion document [RFC5269]…. rfc5269 Distributing a Symmetric FMIPv6 Handover Key Using SEND rfc4260 Mobile IPv6 Fast Handovers for 802.11 Networks rfc5270 MIPv6 Fast Handovers over IEEE 802.16e Networks rfc5271 MIPv6 Fast Handovers for 3G CDMA Networks rfc5568 Mobile IPv6 Fast Handovers following developments led this change Proxy Mobile IPv6 [RFC5213] Dual-stack MIP6 or DSMIP6 [RFC5555] Fast Handover for Proxy MIP6 [pfmipv6] - rfc5949 which is adopted by the enhanced HRPD (CDMA) networks [x.s0057] Slow Fast FMIPv6 To reduce delay and packet loss Minimize packet loss and latency due to handoffs Critical for real-time services several portions of the layer 3 handover are performed in advance prior to the handover, such as new care of address configuration and movement detection to reduce the handover latency. MN acquires a new CoA and registers with previous AR before get link to new AR As soon as MN leaves the current link, old AR starts forwarding traffic to new AR FMIPv6 A tunnel is established between a currently attached access router and an anticipated access router not to lose packets from correspondent nodes during the handover. Operation Detect movement in anticipation (L2 Trigger) Update old AR (before L2 movement) Traffic is then forwarded from Old AR to New AR non-optimal The MN must then also update HA and CNs for optimal routing Bicasting can improve performance Reference Scenario for Handover Message Flow - Predictive Message Flow - Reactive Proxy Router Advertisement (PrRtAdv) In response, the access router (e.g. previous access router) sends a Proxy Router Advertisement message which contains one or more [AP-ID, AR-Info] tuple