Mobility

PRISM: Improving the Performance of Inverse-Multiplexed TCP in Wireless Networks

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Executive Summary

Multi-homed mobile hosts in physical proximity may spontaneously team up to form a community and run high-bandwidth applications by pooling their low Wireless Wide-Area Network (WWAN) bandwidths together for communication with a remote application server. Utilizing their high-bandwidth Wireless Local-Area Network (WLAN), the thus-teamed mobile hosts can aggregate and distribute the application content among themselves. This paper first justifies the need for such a Mobile Collaborative Community (MC2), or a community, to improve user-perceived network bandwidth and utilization. Then, existing one-to-one communication protocols like TCP are shown to suffer significant performance degradation due to frequent out-of-order packet deliveries.

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