A new and efficient adaptive scheduling packets for the uplink traffic in WiMAX networks

Abstract

In this article, an adaptive scheduling packets algorithm for the uplink traffic in WiMAX networks is proposed. The proposed algorithm is designed to be completely dynamic, mainly in networks that use various modulation and coding schemes (MCSs). Using a cross-layer approach and the states of the uplink virtual queues in the base station, it was defined a new deadlines-based scheme, aiming at limiting the maximum delay to the real-time applications. Moreover, a method which interacts with the polling mechanisms of the base station was developed. This method controls the periodicity of sending unicast polling to the real-time and non-real-time service classes, in accordance with the quality of service requirements of the applications. The proposed algorithm was evaluated by means of modeling and simulation in environments where various MCSs were used and also in an environment where only one type of MCS was used. The simulations showed satisfactory results in both environments.

A load-aware weighted round-robin algorithm for IEEE 802.16 networks

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Integrated CAC and scheduling cross-layer algorithms in WiMAX networks with dynamic polling management

“…Otherwise, it rejects this requested connection. The estimate delay is calculated as defined in [6]. If so, the connection is accepted, otherwise it rejects the connection.…”

“…This paper extends the proposed approach in [6], so that a new cross-layer CAC mechanism is inserted. The decisions whether accepted or not a new connection is made based on the Modulations and Coding Schemes (MCSs) information and the number of slots existing in the frame.…”

“…In [6], the authors proposed a new cross-layer scheduling algorithm for the uplink traffic in WiMAX networks. The proposed algorithm guarantees the maximum delay for the real-time applications and minimum rate for the real-time and non-real-time applications.…”

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