Random early detection gateways for congestion avoidance
IEEE/ACM Transactions on Networking (TON)
UMTS Networks: Architecture, Mobility and Services
UMTS Networks: Architecture, Mobility and Services
Achieving differentiated services through multi-class probabilistic priority scheduling
Computer Networks: The International Journal of Computer and Telecommunications Networking
Anatomy of delay performance for the strict priority scheduling scheme in multi-service Internet
Computer Communications
Queueing analysis of explicit priority assignment buffer access scheme for ATM networks
Computer Communications
A fair buffer allocation scheme
Computer Communications
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As UMTS systems have evolved into an all-IP stage, packet switching becomes a prerequisite for all UMTS applications within an UMTS core network, where the traffic of UMTS applications consist of four classes: conversational, streaming, interactive, and background, each of which has its QoS features and packets transmission priority. In this paper, a priority-based queueing scheme with two queueing buffer allocations, the DQB allocation and the OQD allocation, within an UMTS core network gateway is proposed to support differentiated services for packet forwarding among UMTS applications. In the proposed queuing scheme, two major modules, a priority-based enqueueing module and a weighted round robin dequeueing module, are used to handle enqueueing and dequeueing processes of UMTS packets. Many scenarios are simulated using the platform built on ns2. According to on the simulation results, each class UMTS application bases on its packet transmission priority to receive its corresponding packet forwarding performance; a differentiated service in packet forwarding among UMTS applications can be supported by the proposed queueing scheme with the two queueing buffer allocations within an UMTS core network gateway. For the DQB allocation, a packet forwarding starvation might be received by one UMTS application with the lowest packet transmission priority in a continuous traffic pattern; for the OQD allocation, there exists disorder packet transmissions among UMTS application.