Uplink Performance Analysis for a Relay Based Cellular System

Mobile cellular communication systems beyond third generation (3G) are expected to allow subscribers to access an unlimited amount of multimedia and/or voice data with a guaranteed quality of service (QoS) irrespective of their locations. There is therefore a general and continuing requirement to seek improvements to present cellular communication systems for the provisioning of greater throughput per subscriber. In this scope, a further portfolio of standards coined as fourth generation (4G) is currently under study which is intended to extend the capacity of 3G by at least one order of magnitude and offer an entirely packet switched network with data rates expected to range from 100 Mbps for vehicular mobility to 1 Gbps for nomadic access. In order to meet the target of 4G systems, it is clear that the current 3G architecture which is based on a hierarchical cellular structure has to be upgraded. In [1], we introduced a novel relay based architecture termed as basestation relay integration deployment for "G^th" enhancement (BRIDGE) as a promising candidate to improve coverage and enhance the capacity of 3G networks at the cell edge. This paper provides an overview of the mathematical analysis of the uplink performance for the integration of this relay based system in the conventional mobile cellular architecture. A comparative study of BRIDGE against the conventional sectorised cell structure for a single cell scenario is provided for performance analysis with respect to coverage, user capacity and transmits power for DS-CDMA system