A Channel Aware Scheduling Algorithm for HSDPA System

Abstract:
High Speed Downlink Packet Access (HSDPA) is an evolutionary step to boost the WCDMA performance for downlink packet traffic as it increases spectral efficiency by supporting high user data rates. Because of the time varying channel fluctuations of wireless links, efficient use of the large available bandwidth cannot be achieved without adopting channel aware packet scheduling strategies. The HSDPA scheduling algorithm is based on splitting the scheduling decision into user selection and resource allocation. In this paper we propose two user selection algorithms that can be adjusted (or pre-configured) in terms of cell throughput and/or user throughput fairness. Finally, we discuss a channel aware resource allocation algorithm that aims to maximize the number of served users among the selected ones, without any loss of the overall cell throughput with respect to the traditional greedy resource assignment.