CDMA 1X radio access network IP backhaul sizing analysis

This paper focuses on the sizing methodology for the link between the base station transceiver (BTS) and the central base station controller (CBSC). Packet-switched technology has promised greater flexibility and increased utilization of resources for the cellular operators. This brought new challenges in terms of traffic engineering that could not be addressed by Erlang-B formula alone. We present analysis techniques for IP backhaul sizing in CDMA 1X radio access network (RAN). We first present the 2G/2.5G circuit backhaul efficiency analysis for voice traffic. Using the central limit theorem we analyze 3G packet-switched backhaul efficiency with mixed voice, data, and signaling traffic for a single T1 link. Applying the knowledge gained from the single backhaul link efficiency analysis, we present practical steps to calculate the number of backhaul links required to meet QoS demands given a operator-specified call model.