A Survey on Uplink and Downlink Radio Resource Management in Wireless networks

Abstract

OFDMA is the access scheme used in the
third and fourth generation wireless cellular networks.
Proper allocation of bandwidth and power is essential
for ensuring the optimal performance and utilization of
the resources in the OFDMA based cellular networks.
The resource allocation in uplink direction and
downlink directional will need different approaches. In
uplink direction, different categories of algorithms like
static, dynamic, centralized, distributed, instantaneous,
stochastic, single cell, multi-cell, optimal, suboptimal
algorithms are followed. In case of downlink direction,
margin adaptive and rate adaptive algorithms are
followed. In this paper, resource allocation and
scheduling schemes in both uplink and downlink of
OFDMA are considered. Various resource allocation
approaches and the challenges faced are discussed.