Uplink Scheduling with Quality of Service in IEEE 802.16 Networks

Abstract

In order to support real-time and bandwidth demanding applications the IEEE 802.16 standard is expected to provide Quality of Service (QoS). Although the standard defines a QoS signaling framework and four service levels, scheduling mechanisms for this network are unspecified. In this paper, we propose a scheduling discipline for uplink traffic. Simulation results show that our scheme is capable to provide QoS. Moreover it shares fairly the resources among connections of the same service type.

An Uplink Bandwidth Management Framework for IEEE 802.16 with QoS Guarantees

“…This paper details the different algorithms used in our framework. The framework was analyzed using simulation and compared to standard WiMAX procedure and a scheduling algorithm proposed in [5]. Our framework allows giving guarantees on the rate and the access delays of time sensitive flows.…”

“…Recent work concentrated on these aspects. Architectures focusing on the different uplink scheduling algorithms to be used for the different classes of service were given in [3][4][5]. A QoS architecture was defined in [6] which instantiated the different blocs of a QoS architecture (admission control, classifiers, schedulers, traffic shaper and different queuing mechanisms).…”

“…This is also the case in other scenarios presented in the business case analysis [2]: for example serving high speed Internet access in rural areas where DSL services are not available. Several work proposed scheduling algorithms for WiMAX [3][4][5]. Others proposed QoS architectures [6] giving scheduling and admission algorithms.…”

Design of Scheduling Algorithm for QoS Management on WiMAX Networks

“…This simulation presents that average delay for UGS application is guaranteed using the WFQ algorithms and the minimum delay is obtained using the same algorithm for all kinds of applications. Figures 7,8,9 and 10 show that the jitter is minimal when the network is not loaded, increasing the number of nodes causes an increase of the jitter. This could be explained by the increase of delay in queues.…”

“…Most of the researches are based on IEEE 802.16 standard. An overview of some of these approaches can be found in [3][4][5][6][7][8]. They can be divided into categories to define the requirements, such as parameters that indicate quality of service and mechanisms that act over these parameters.…”