Mobility

IDMA-Based Cooperative Partial Packet Recovery: Principles and Applications

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Executive Summary

In this paper, the authors focus on the cooperative multi-user network model and propose a relay-assisted partial packet recovery scheme in which asynchronous Interleave-Division Multiple-Access (IDMA) with iterative chip-by-chip MultiUser Detection (MUD) is used for the recovery of partial packets from multiple sources. In packet transmission, only a few erroneous bits may cause the entire packet to be discarded and partial packet recovery can reduce waste in resource by retransmitting only the bits that is unreliable. As the retransmitted partial packets for different sources can be of different lengths, IDMA is particularly suitable because of the simplicity of chip-by-chip MUD and because there is no need for strict synchronization.

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