Joint resource allocation and base-station assignment for the downlink in CDMA networks

Authors:
Jang-Won Lee;Ravi R. Mazumdar;Ness B. Shroff
Affiliations:
CITY-Center for Information Technology of Yonsei University, Department of Electrical and Electronic Engineering, Yonsei University, Seoul, Korea;Department of Electrical and Computer Engineering, University of Waterloo, West Waterloo, ON, Canada;School of Electrical and Computer Engineering, Purdue University, West Lafayette, IN
Venue:
IEEE/ACM Transactions on Networking (TON)
Year:
2006

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Abstract

In this paper, we jointly consider the resource allocation and base-station assignment problems for the downlink in CDMA networks that could carry heterogeneous data services. We first study a joint power and rate allocation problem that attempts to maximize the expected throughput of the system. This problem is inherently difficult because it is in fact a nonconvex optimization problem. To solve this problem, we develop a distributed algorithm based on dynamic pricing. This algorithm provides a power and rate allocation that is asymptotically optimal in the number of mobiles. We also study the effect of various factors on the development of efficient resource allocation strategies. Finally, using the outcome of the power and rate allocation algorithm, we develop a pricing-based base-station assignment algorithm that results in an overall joint resource allocation and base-station assignment. In this algorithm, a base-station is assigned to each mobile taking into account the congestion level of the base-station as well as the transmission environment of the mobile.