Extending WPANs to support multi-hop communication with QoS provisioning
CCNC'10 Proceedings of the 7th IEEE conference on Consumer communications and networking conference
Resource Allocation in High Data Rate Mesh WPAN: A Survey Paper
Wireless Personal Communications: An International Journal
| Hi-index | 0.00 |
The 802.15.3 standard is a reference point for high data-rate wireless personal area networks (WPANs), being able to support also multimedia applications with specific quality of service (QoS) requirements. In a 802.15.3 piconet, a single piconet co-ordinator (PNC) distributes channel time allocations (CTAs) to devices (DEVs) associated to it, in order to provide the expected QoS. The 802.15.3 standard does not specify how this allocation should be done. To bridge this gap, we propose a dynamic CTA scheduling scheme that provides bounded average delays to multimedia applications. The algorithm is based on a control theoretic approach and acts in two steps: (1) each single DEV computes its transmission needs by applying a control algorithm that targets empty transmission queues; (2) the PNC collects requests of DEVs and allocates CTAs by taking into account the capacity constraints of the wireless channel. The main properties and the tuning rules of the algorithm have been theoretically investigated. Moreover, in order to provide a comprehensive performance evaluation of the proposed approach, realistic scenarios with video, voice, and FTP flows have been simulated using ns-2. Results confirm that our scheduler is able to satisfy the expected delay bounds in a wide range of traffic loads. Copyright © 2009 John Wiley & Sons, Ltd. A preliminary version of this work appeared as ‘A Dynamic Bandwidth Allocation Algorithm for Supporting Real-time Applications in 802.15.3 WPANs’ in Proc. of the Q2SWinet 2007 Workshop, Chania, Greece.