Resource allocation mechanism in IEEE 802.15.3 parent/child model

Abstract

In this paper, a novel mechanism for access control and resource allocation in a parent/child IEEE 802.15.3 network is proposed. The main objective is twofold; first the idea of using a dynamic superframe size that ensures the efficient use of the superframe is implemented; second, two approaches for resource allocation among child PicoNet Coordinators (PNCs) and DEVices (DEVs) based on the dynamic superframe idea are proposed. These approaches, referred to as "Algorithm with utilization threshold" and "Algorithm with threshold and service differentiation", are studied in comparison with a basic approach. They share the concepts of the dynamic superframe size, the prioritization of child PNCs over DEVs and the admission control strategy. They are then differentiated by applying the superframe utilization threshold concept in the "Algorithm with utilization threshold" and the addition of service differentiation in the "Algorithm with threshold and service differentiation". The superframe utilization threshold allows more devices to access the shared superframe, whereas the service differentiation guarantees the quality of service (QoS) requirements for real-time traffic requests. The proposed mechanism seeks to apply a compromise between the devices satisfaction, the QoS requirements and the requests rejection rate to induce fairness and service differentiation. Simulation results show that the proposed algorithms provide high satisfaction for both child PNCs and DEVs with greater satisfaction for the child PNCs. The superiority of using the dynamic superframe size over the fixed superframe size is also shown by the efficient use of the superframe and the minimized delay between the channel time allocations of the same device in the subsequent superframes.