Downlink Performance for Mixed Web/VoIP Traffic in 1xEVDO Revision A Networks

Current 3G cellular networks, such as those based on 1xEVDO Revision A, have several mechanisms to provide quality of service (QoS) to network applications. In this paper, we investigate the performance for mixed Web/VoIP traffic on the downlink in 1xEVDO revision a networks. The impacts from the mixed traffic are studied by using link-level simulations. Our simulator is built based on a realistic system model that includes physical channel parameters, transmission formats, and channel scheduling algorithms, as well as hierarchical traffic models. User-perceived throughput and packet delay are explored. We present our observations and determine the Erlang capacity of the network. We carry out performance analysis using an equivalent queue approach, and discuss appropriate scheduling algorithms and call admission control mechanisms based on the simulation results.