Design and analysis of a replicated server architecture for supporting IP-Host mobility

  • Authors:
  • Jason P. Jue;Dipak Ghosal

  • Affiliations:
  • University of California, Davis, CA;University of California, Davis, CA

  • Venue:
  • ACM SIGMOBILE Mobile Computing and Communications Review
  • Year:
  • 1998

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Abstract

Mobility support in IP networks requires servers to forward packets to mobile hosts and to maintain information pertaining to a mobile host's location in the network. In the mobile Internet Protocol (mobile-IP), location and packet forwarding functions are provided by servers referred to as home agents. These home agents may become the bottleneck when there are a large number of mobile hosts in the network. In this paper, we consider the design and analysis of a replicated server architecture in which multiple home agents are used to provide mobility support. In order to minimize the delay across the home agents, one of the key aspects is the design of load balancing schemes in which a home agent may transfer the control of a mobile host to another home agent in the same network. The methods for triggering the transfer and the policy for selecting the next home agent define various load balancing schemes which have different performance characteristics. In this paper, we design a protocol that forms the building block for implementing such load balancing schemes, and we then study the performance characteristics of random, round-robin, and join the shortest queue (JSQ) selection policies, and timer-, counter- and threshold-based transfer policies.