Computer Networks: The International Journal of Computer and Telecommunications Networking
A multi-channel token ring protocol for QoS provisioning in inter-vehicle communications
IEEE Transactions on Wireless Communications
Mobile Networks and Applications
Comprehensive Structure of Novel Voice Priority Queue Scheduling System Model for VoIP Over WLANs
International Journal of Advanced Pervasive and Ubiquitous Computing
Modelling and Performance Studies of ATM Networks Over Email & FTP
International Journal of Advanced Pervasive and Ubiquitous Computing
| Hi-index | 0.00 |
Most of the existing medium access control (MAC) protocols for wireless local area networks (WLANs) provide prioritized access by adjusting the contention window sizes or inter-frame spaces for different traffic classes. Those MAC protocols can only provide statistical priority access and limited service differentiation. In this paper, a novel token-based scheduling scheme is proposed for a fully-connected WLAN that supports both voice and data traffic. The proposed scheme can provide guaranteed priority access to voice traffic and, at the same time, provide more precise and quantitative service differentiation for data traffic, which provides great flexibility and facility to the network service provider for service class management. Simulation results demonstrate that the proposed scheme can guarantee a small delay for voice traffic. For data traffic, it can effectively achieve proportional differentiation among different classes, while achieving fair resource sharing within the same class. In addition, compared with a contention based scheme and a centralized polling scheme, the proposed scheme significantly improves the channel utilization by avoiding collisions (in the contention based scheme) and the polling overhead (in the polling scheme). The performance analysis of the proposed scheme is also presented. The accuracy of the analytical results is verified by computer simulations.