Handoff detection method, for SimpleIP and MobileIP, which supports IOS 40 and which allows inter-PCF handoff while maintaining connectivity as well as Inter-PDSN handoff even when going back to source PDSN and reusing existing RP session
Publication Date: 2001-Jan-24
The IP.com Prior Art Database
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The idea is to obtain, during the PPP negotiation, a Magic Number identifying the MN. With that Magic Number being kept into its bindings, the PDSN would trigger the exchange of Echo messages when an A11-RRQ is received, without any Vendor Specific Extension or with only the Active Start attribute, or when an A11-RRQ with connection setup attribute is received for a MN already registered. If the Magic Number specified within the Echo message is not the one expected by the PDSN (kept into the binding), the PPP session must be re-negotiated (the MN is coming from another PDSN).