Improvements on Cooperative Retransmission Scheme in Wireless Ad hoc Networks

doi:10.13190/jbupt.200704.23.liy

JOURNAL OF BEIJING UNIVERSITY OF POSTS AND TELECOM ›› 2007, Vol. 30 ›› Issue (4): 23-27.doi: 10.13190/jbupt.200704.23.liy

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Improvements on Cooperative Retransmission Scheme in Wireless Ad hoc Networks

LI Yi, JI Hong, MA Shuhui

Key Laboratory of Universal Wireless Communications, Ministry of Education, Beijing University of Posts and Telecommunications, Beijing 100876, China

Received:2006-09-29 Revised:2007-01-08 Online:2007-08-30 Published:2007-08-30
Contact: LI Yi

Abstract

Abstract:

An improved cooperative retransmission scheme based on node cooperative stop and wait automatic repeat request （ARQ） protocol is proposed. In order to avoid ambiguous acknowledgement or negative acknowledgement (ACK/NAK) and diffusion of cooperation process, cooperative and noncooperative frames are distinguished. Traffic categories within each node are introduced so that cooperative frames can be sent in advance. According to instantaneous channel conditions, the “best” partner is selected to help the source retransmit data. Analytical and simulation results indicate that improved scheme can alleviate collision problem caused by cooperation, increase probability of successful retransmissions and enhance system throughput.

Key words: cooperative retransmission, traffic priority, probability of successful retransmission, Ad hoc network

CLC Number:

TN393

LI Yi, JI Hong, MA Shuhui

. Improvements on Cooperative Retransmission Scheme in Wireless Ad hoc Networks[J]. JOURNAL OF BEIJING UNIVERSITY OF POSTS AND TELECOM, 2007, 30(4): 23-27.

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Improvements on Cooperative Retransmission Scheme in Wireless Ad hoc Networks

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