Packet-length adaptive CLSP/DS-CDMA: performance in burst-error correlated fading channels

Authors:
V. V. Phan;S. G. Glisic;D. D. Luong
Affiliations:
Nokia Networks, Oulu, Finland;-;-
Venue:
IEEE Transactions on Wireless Communications
Year:
2004

Citing 0
Cited 2

Routing in ad-hoc networks with MIMO links: Optimization considerations and protocols

Computer Networks: The International Journal of Computer and Telecommunications Networking
Throughput Analysis of DS CDMA/Unslotted ALOHA Wireless Networks with Fixed Packet Length in Rayleigh Fading Finite-State Markov Channel Model

Wireless Personal Communications: An International Journal

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Abstract

The authors analyze throughput-delay performance of an unslotted channel load sensing protocol (CLSP)/direct sequence (DS)-code division multiple access (CDMA) packet radio network (PRN) with adaptive packet length over burst-error correlated fading channels. CLSP controls the packet access in uplink of unslotted ALOHA/DS-CDMA systems so that contention is avoided and throughput is maximized. However, due to high uncertainty of radio channels, the performance of CLSP/DS-CDMA PRN may suffer from notable degradations. Using theoretical analysis and simulation, the authors show that in highly correlated fading environments adapting the length of radio packets to fading conditions significantly improves system performance and energy efficiency of mobile terminals. In their modeling, they study the relation between the fade statistics and the packet length in correlated Rayleigh fading channels. The effects of reception diversity, imperfect transmit power control (TPC), and user mobility are considered. The results are used to develop simple, energy-efficient, and robust adaptation mechanisms.