Abstract
Multimedia services over resource constrained wireless sensor networks (WSNs) face a performance bottleneck issue from the gateway node to the sink node. Therefore, the queue management at the gateway node is crucial for diversified messages conveyed from the front nodes to the sink node. In this article, beacon order-based random early detection (BOB-RED) queue management is proposed. BOB-RED is a dynamic adaptation scheme based on adjusting beacon interval and superframe duration in the IEEE 802.15.4 MAC superframe accompanied with RED queue management scheme to increase the transmission efficiency of multimedia over WSNs. We focus on the performance improvement upon different traffic loads over WSNs. Evaluation metrics include end-to-end delay, packet delivery ratio, and energy consumption in IEEE 802.15.4 beacon enabled mode. Simulation results show that BOB-RED can effectively decrease end-to-end delay and energy consumption compared to the DropTail scheme.
Highlights
IEEE 802.15.4 standard [1] defines the protocol and interconnection of devices via radio communication in a wireless personal area network (WPAN)
The proposed scheme consists of a virtual threshold function, a dynamic adjusted perflow drop probability, a dynamic modification of beacon order (BO) and superframe order (SO) strategy that decrease end-to-end delay, energy consumption, and increase throughput when there are different traffic type flows through the gateway node
We evaluate the impact of the following parameters on the performance of slotted CSMA/CA: (1) the beacon order and the superframe order, (2) queuing management scheme such as random early detection (RED) and DropTail, (3) different traffic loads with dynamic adaptation scheme
Summary
IEEE 802.15.4 standard [1] defines the protocol and interconnection of devices via radio communication in a wireless personal area network (WPAN). There has been no motivation for realtime applications to use endto-end congestion avoidance mechanisms for IEEE 802.15.4 WSNs. We study the performance evaluation of different queue management algorithms, such as DropTail, RED on gateway node in this article. A dynamic adaptation scheme based on adjusting BI and superframe duration (SD) in the IEEE 802.15.4 MAC superframe is proposed to increase the transmission efficiency of multimedia over WSNs. This article presents beacon-order based RED (BOBRED) queue management for congestion avoidance in IEEE 802.15.4 WSNs. The proposed scheme consists of a virtual threshold function, a dynamic adjusted perflow drop probability, a dynamic modification of BO and SO strategy that decrease end-to-end delay, energy consumption, and increase throughput when there are different traffic type flows through the gateway node. We try to apply RED mechanism in IEEE 802.15.4 WSNs
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