Study of an admission control with adaptive probability in relay enhanced LTE-Advanced networks

Relaying is emerging as one of the key radio access techniques for LTE-Advanced (LTE-A) networks to fulfill the LTE-Advanced coverage and capacity requirements in a cost-efficient way. Relaying enables improved high data rate coverage for indoor environments or at the cell edge by deploying a low power base station. Type I in-band relaying supports a relaying mode where the backhaul link transmission is time-division multiplexed with the access link reception, whereas macro users share the same resources with the relays. The main contribution of this paper is to propose a novel admission control with an adaptive resource partitioning (AC-ARP) scheme to facilitate the operation of fixed relay stations in the OFDMA-based relay enhanced LTE-Advanced networks in a more efficient way. Its performance comparisons with conventional admission control with a fixed resource partitioning (AC-FRP) scheme in terms of system utilization and probability of loss is presented and discussed. The results also indicate the superiority of AC-ARP because it is able to achieve a better balance between system utilization and QoS provisioning compared to the AC-FRP scheme.