QoS-aware radio resource management scheme for CDMA cellular networks based on dynamic interference guard margin (IGM)

Authors:
Huan Chen;Sunil Kumar;C.-C. Jay Kuo
Affiliations:
Department of Electrical Engineering, National Chung Cheng University, Chiayi 621, Taiwan;Department of Electrical and Computer Engineering, Clarkson University, Potsdam, NY 13699, United States;Integrated Media Systems Center and Department of Electrical Engineering, University of Southern California, Los Angeles, CA 90089-2564, United States
Venue:
Computer Networks: The International Journal of Computer and Telecommunications Networking
Year:
2004

Citing 12
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Abstract

Efficient radio resource management (RRM) for CDMA-based cellular communication systems using the interference guard margin (IGM) scheme is investigated in this work. Two important concepts, i.e., the guard channel (GC) and the load curve (LC), are integrated to derive IGM. The resulting call admission control (CAC) scheme gives preferential treatment to higher priority handoff calls by pre-reserving a certain amount of resource in terms of IGM. A radio resource estimation (RRE) function is implemented in each base station (BS) to assist RRM module to adjust the level of IGM dynamically. RRE in each BS estimates the amount of IGM by considering traffic load in its current cell as well as traffic conditions in neighboring cells. A service model is adopted to support quality of service (QoS) demand of multiple services, which includes mobile terminal's data rate, different levels of priorities, mobility and rate adaptivity characteristics. Simulations are conducted by OPNET to study performance of the proposed IGM scheme in terms of a defined cost function, new call blocking probability, handoff dropping probability and system utilization, under different traffic conditions.