Domain based approach for QoS provisioning over mobile IP

Mobile IP (MIP)[1] ensures packet routing to the mobile host when its attachment is changed on Internet. MIP defines two functional entities - HA (Home Agent) and FA (Foreign Agent) - to pursue the location of mobile host and tunneling to deliver packets that are destined to the mobile node's home address. It satisfies the design goal, which was to make the size and the frequency of route update as small as possible. But, this tunneling has difficulties in adapting Internet service architecture Integrated Service and Differentiated Service. Since both identify, the service session as destination IP address, IP protocol number and destination port, new different service session must be defined over IP tunnel. For that reason, how to guarantee the QoS over IP tunnel and interoperate with end-to-end service session are key features for MIP QoS. So, the current MIP QoS works are concentrated on this issue. However, current MIP QoS work seems to neglect host mobility supporting protocol. Since MIP QoS is mostly dependent on host mobility supporting protocol, we believe that the host mobility supporting protocol must be regarded as important factor. The current host mobility supporting protocol has hierarchical architecture as micro mobility and macro mobility. So, if the MIP QoS could be viewed as the same hierarchical architecture, the better QoS guarantee might be possible. This paper specifies a hierarchical scheme, which uses not only aggregate RSVP between domain level agents, but also applying specific local policy between domain level agent and mobile host in a domain.