[KSCI] Korea Science Citation Index Service

Slotted CDMA_ALOHA Protocol with Hybrid ARQ in Wireless Communication Network

Lim, In-Taek (Department of Computer Engineering, Pusan University of Foreign Studies)

Publication Information

Journal of information and communication convergence engineering / v.5, no.3, 2007 , pp. 194-199 More about this Journal

Abstract

In this paper, a slotted CDMA_ALOHA protocol with hybrid ARQ is proposed for the wireless CDMA communication networks. The proposed protocol combines the characteristics of the slotted ALOHA, CDMA, and the hybrid ARQ, in order to increase the throughput by reducing the number of retransmissions when the channel experiences heavy traffic. The main feature of the proposed protocol is the utilization of the forward error correction capability to correct errors that appear after the CDMA dispreading of the packets. The base station does not need to ask so often for retransmission of erroneous packets. It will request for retransmission only when the FEC capability is exceeded. The performance of the proposed protocol is analyzed by considering the packet collision probability as well as the bit error probability. The numerical results show that the system throughput is closely related to the bit error rate of the wireless link and the FEC coding rate.

Keywords

CDMA; Hybrid ARQ; Medium access control protocol; Slotted ALOHA;

Citations & Related Records

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