Abstract:

A radio resource allocation and scheduling algorithm for multiuser MIMO/OFDMA
systems is proposed to efficiently support the diverse quality of service (QoS)
requirements of heterogeneous services. Firstly, the priority is given by taking
into account QoS requirements, channel conditions, throughput, and queue state
information. Then, the user selection on the same subcarrier based on the channe
l correlation, power allocation, and bit loading are implemented. The algorithm
aims to maximize the system throughput by fully exploiting multiuser diversity
gain in space, time, and frequency domain while guaranteeing the delay requirem
ent for realtime services and minimum rate requirement for nonrealtime ser
vices. The simulation results show that the proposed algorithm improves the syst
em performance in terms of the system throughput, packet dropping probability, a
nd the ratio of unsatisfied minimum data rate of nonrealtime services.

Key words: space division multiple access, resource allocation, scheduling algorithm, heter
ogeneous traffic； quality of service