Analytic modeling of the UMTS enhanced uplink in multi-cell environments with volume-based best-effort traffic

The UNITS Enhanced Uplink enables the efficient transport of packet-switched Internet traffic. With bit rates comparable to DSL links, it is expected that best-effort services like file-sharing become increasingly popular in UNITS networks. These services are often volume-based, which means that the sojourn time of a connection depends on the transmitted data volume. In this work, we propose an analytic model for the in- terference and capacity in the Enhanced Uplink, which considers the impact of volume-based traffic on system capacity, other-cell interference and co-existing time-based QoS users. The analytic model is validated with a flow-level event-discrete simulation.