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Electronics and Telecommunications Research Institute (한국전자통신연구원)
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Enhancement of Return Routability Mechanism for Optimized-NEMO Using Correspondent Firewall

  • Hasan, Samer Sami (Department of Computer Science, Universiti Kebangsaan Malaysia) ;
  • Hassan, Rosilah (Department of Computer Science, Universiti Kebangsaan Malaysia)
  • Received : 2011.12.23
  • Accepted : 2012.07.23
  • Published : 2013.02.01
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Abstract

Network Mobility (NEMO) handles mobility of multiple nodes in an aggregate manner as a mobile network. The standard NEMO suffers from a number of limitations, such as inefficient routing and increased handoff latency. Most previous studies attempting to solve such problems have imposed an extra signaling load and/or modified the functionalities of the main entities. In this paper, we propose a more secure and lightweight route optimization (RO) mechanism based on exploiting the firewall in performing the RO services on behalf of the correspondent nodes (CNs). The proposed mechanism provides secure communications by making an authorized decision about the mobile router (MR) home of address, MR care of address, and the complete mobile network prefixes underneath the MR. In addition, it reduces the total signaling required for NEMO handoffs, especially when the number of mobile network nodes and/or CNs is increased. Moreover, our proposed mechanism can be easily deployed without modifying the mobility protocol stack of CNs. A thorough analytical model and network simulator (Ns-2) are used for evaluating the performance of the proposed mechanism compared with NEMO basic support protocol and state-of-the-art RO schemes. Numerical and simulation results demonstrate that our proposed mechanism outperforms other RO schemes in terms of handoff latency and total signaling load on wired and wireless links.

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