Fair and efficient resource allocation model in a wireless multimedia CDMA system

Abstract

In this paper, we address the resource allocation problem in wireless multimedia CDMA systems. The cellular CDMA system is interference-limited; the limit on the capacity is reached when anyone of SIR(signal to interference ratio) of each user is less than the predetermined threshold value. Given the minimum QoS(measured by bit energy to noise density), service rate(by bit per second) requirement and transmit power limit, we formulate the feasibility condition in terms of SIR instead of the transmitted power, which is mostly used in literatures, so that many advantages are obtained; smaller number of variables, simpler structure of feasible region, etc. From the perspectives of micro-economics, we discuss existing optimization criteria such as the minimum total transmitted power or maximum sum of the rates, which are to be verified not to guarantee fairness, Accordingly, we suggest the new allocating decision criteria taking fairness as well as efficiency into account.