Third generation (3G) mobile phones are leading the telecommunications world into a new era. 3G networks offer increased speed for mobile users and enable new services. Mobile streaming applications benefit from these new capabilities, although streaming doesn't strictly requires a 3G network to work. The purpose of this paper is to show how 3G can improve the performance of streaming applications. In particular, we will reference the 3GPP Packet-switched Streaming Service (PSS).

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Mobile streaming is thought to be mainly a 3G service offered with guaranteed bit rates, error rates and delay bounds. In this paper we analyze the feasibility of streaming services in a 2.5G environment. GPRS Rel. '97 allows enough bandwidth for streaming, but it cannot guarantee bit rates or delays. We study different QoS parameter configurations to find optimal values for streaming over GPRS Rel. '97. Its error protection is good enough, if the correct QoS profile is chosen. GPRS cell reselections cause additional problems for streaming, since several seconds of data can be lost. Results show that despite all the limitations, streaming is possible in a GPRS environment and this service can be started even before the deployment of 3G networks.

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