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, the authors 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. Their 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. They present their observations and determine the Erlang capacity of the network.