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Through its support for multi-homing, the Stream Control Transmission Protocol (SCTP) is a suitable solution to implement and manage user's mobility by abstracting multiple physical paths into a single end-to-end association. In order to detect the primary path failure, SCTP uses a strategy defined in the RFC2960 and mainly based on a Retransmission Time Out (RTO). When a number of retransmission failures occur on the primary path, switchover procedure is initiated which means that a new primary path will be selected among the available secondary paths. In this paper, the authors investigate the current switchover mechanism implemented in SCTP and detail some of its deficiencies which affect the use of SCTP in a WLAN environment.
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