Third generation wireless networks carry traffic from heterogeneous sources such as voice, data, video or multimedia with a specified quality of service. Efficient traffic management schemes should be developed to provide seamless access to the wireless network. This paper proposes a novel cell switching (e.g., packet handoff) scheme to support QoS guarantee for downlink in EGPRS (Enhanced General Packet Radio Service) network. The paper defines the new packets and handoff packets for each type of traffic and devises a new prioritization scheme at the buffer of the base station. It presents the procedure to find the optimal thresholds satisfying the QoS requirements.
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