This paper introduces a dynamic paging scheme based on the semi-realtime movement information of an individual user, which allows a more accurate predication of the user location at the time of paging.In general, a realtime location tracking scheme may require complex control schemes and incur unacceptably high computation and messaging cost.Our proposed approach, namely velocity paging scheme, relaxes the realtime constraints to semirealtime to provide a good combination of cost reduction and esse of implementation.The proposed velocity paging scheme utilizes semi-realtime velocity information, namely velocity classes, of individual mobile terminal and dynamically generates a paging zone (a list of cells to be paged) for it.Therefore, the total paging cost can be reduced due to the paging area reduction.Much consideration also has been given to reduce the complexity for the proposed scheme.As a result, it only requires minimal extra overhead and is feasible to implement in current cellular/PCS networks.The velocity paging can be combined with movement-based registration or other registration schemes.Analytical results of velocity paging and movement-based registration combination are provided to demonstrate the cost effectiveness of the scheme under various parameters in comparison with location area scheme.

Mobile hosts in a wireless network can move from one location to another while communicating with other hosts. A challenge is to provide seamless network access for mobile hosts and, at the same time, to retain compatibility with existing network protocols and applications. This paper addresses the issue of route optimization in IP mobility support that provides mobile handoff and "triangle" routing to mobile hosts through their home agents. We combine IP mobility support with hierarchical dynamic routing protocols OSPF and BGP. Existing mechanisms of authentication, incremental route propagation, and address aggregation can be used for efficient and secure propagation of location updates of mobile hosts. The geographical locality of consecutive mobile handoffs fits well with hierarchical dynamic routing protocols. No changes are required on fixed hosts or on routers that do not handle mobile hosts directly.