Jiwon Jang, Seil Jeon, Younghan Kim
(School of Electronic Engineering, Soongsil University, Seoul 156-743, Korea)
Abstract：Current mobility management schemes usually represent centralized or hierarchical architectures, which force data traffic to be processed by a centralized mobility anchor. This allows the mobile node (MN) to be reachable anywhere and provides an efficient method for seamless session continuity. However, all of the signal messages and data traffic converge on particular mobility anchor, which causes excessive signaling and traffic at the centralized mobility anchor and single point of failure issues as data traffic increases. To overcome these limitations and handle increasing data traffic, the distributed mobility management (DMM) scheme has emerged as an alternative solution. Although previous researches have been conducted on DMM support, because their schemes employ an unconditional way to make direct paths after handover, they have some drawbacks, such as several signaling and chain of tunneling problems. Therefore, this paper introduces a new DMM scheme which adaptively creates a direct path. To support it, we present the path selection algorithm, which selects the most efficient path between a direct path and no direct path based on routing hops and traffic load. Through the performance analysis and results, we confirm that the proposed scheme is superior in terms of signaling and packet delivery costs.
Key words：distributed mobility management (DMM); mobility anchor (MA); path selection algorithm
CLD number： TN926 Document code： A
Article ID： 1674-8042(2012)02-0146-06 doi： 10.3969/j.issn.1674-8042.2012.02.010
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