STRIPING DELAY-SENSITIVE PACKETS OVER MULTIPLE BURSTY WIRELESS CHANNELS (FriAmOR6)

Author(s) : Gene Cheung (Hewlett-Packard Labs, Japan) Puneet Sharma (Hewlett-Packard Labs, United States of America) Sung-Ju Lee (Hewlett-Packard Labs, United States of America)

Abstract : Multi-homed wireless devices have multiple wireless communication interfaces. Each interface connects to the Internet via a long range but low speed and burst loss WAN such as a cellular link. In this paper, we propose a packet striping system for such multi-homed devices --- a mapping of flows by an intemediate gateway to multiple channels of multiple interfaces, such that the overall performance is enhanced In particular, we model and analyze the striping of delay-sensitive media packets over multiple burst-loss channels. We first derive the expected packet loss ratio when FEC (Forward Error Correction) and retransmissions are applied for error protection over multiple channels. We next model and analyze the case when the channels are bandwidth-limited. We then develop a dynamic programming-based approximation algorithm that solves the optimal striping problem for the ARQ, the FEC, and the hybrid FEC/ARQ case.

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