TeleMIP: Telecommunications-enhanced mobile IP architecture for fast intradomain mobility

This article first surveys existing protocols for supporting IP mobility an d then proposes an extension to the Mobile IP architecture, called TeleMIP. Our architecture attempts to achieve smaller handoff latency by localizing the scope of most location update messages within an administrative domain or a geographical region. TeleMIP is intended for use in evolving third-ge neration wireless networks, and introduces a new logical entity, called the mobility agent, which provides a mobile node with a stable point of attach ment in a foreign network. While the MA is functionally similar to conventi onal foreign agents, it is located at a higher level in the network hierarc hy than the subnet-specific FAs. Location updates for intradomain mobility are localized only up to the MA; transmission of global location updates ar e necessary only when the mobile changes administrative domains and/or geog raphical regions. By permitting the use of private or locally scoped addres ses for handling intradomain mobility, TeleMIP allows efficient use of publ ic address space. Also, by reducing the frequency of global update messages , our architecture overcomes several drawbacks of existing protocols, such as large Latencies in location updates, higher likelihood of loss of bindin g update messages, and loss of inflight packets, and thus provides better m obility support far real-time services and applications. The dynamic creati on of mobility agents (in TeleMIP) permits the use of load balancing scheme s for the efficient management of network resources.