Scheduling methods with transmit power constraint for CDMA packet services

Abstract

In the 3rd-generation mobile communication systems providing packet service, optimal scheduling methods are required to increase the packet service efficiency. Among several scheduling methods, a packet scheduling method providing bounded delay service may be classified into three categories: static-priority (SP), earliest-deadline-first (EDF), and rotating-priority-queues (RPQ). In this paper, these three scheduling methods which have been studied in the field of computer networks are applied to an interference-limited CDMA system with transmit power constraint. Then, the performances of these three scheduling methods are compared by considering both the data loss rate and the transmit power level. Also, we propose a modified FIFO scheme, which is more efficient in power-constraint systems such as the interference-limited CDMA system. The performance of the modified FIFO scheme is compared with the basic FIFO scheme.