Proxy Home Agents for Route Optimization in HAP Networks

Proxy Home Agent (PHA) functionality is proposed for platform nodes in High Altitude Platform (HAP) networks. The solution enables more efficient backhaul link utilization due to path optimization capabilities in an environment with mobile routers. The existing route optimization function of Mobile IP (MIP) cannot solve this problem, while Hierarchical MIP based route optimization does not map well on the HAP network architecture. Optimal inter-platform routes may be achieved even when mobility management for mobile routers does not include support for route optimization. The solution can be rewarding in network architectures where access network is separated from global network through bottleneck links and the majority of users accessing the network are mobile routers. Key-Words: Wireless Networks, High Altitude Platforms, Mobility Management, Mobile Routers, Mobile IP