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Does relay of corrupted packets increase capacity?

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2 Author(s)
Karande, S.S. ; Dept. of Electr. & Comput. Eng., Michigan State Univ., East Lansing, MI, USA ; Radha, H.

Cross-layer protocols that are designed for wireless exhibit both errors and erasures. The nature of these error/erasure impairments and their impact on capacity is a function of the particular cross-layer scheme used. In this paper, we consider two (rather abstract) communication schemes, cross layer design (CLD) and cross layer design with side-information (CLDS). We make a comparative analysis of the channel capacities of these schemes over single and multi-hop wireless channels to identify the conditions under which the cross-layer protocols/channels can provide improved performance over traditional (pure) erasure channels. We show that cross-layer schemes like CLD lead to a capacity increase in most realistic channel scenarios (especially over a single hop) and schemes such as CLDS always lead to a capacity increase.

Published in:

Wireless Communications and Networking Conference, 2005 IEEE  (Volume:4 )

Date of Conference:

13-17 March 2005