Fourth Stage of Voice Priority Queue for VoIP over WLANs

Fourth Stage of Voice Priority Queue for VoIP over WLANs

Kashif Nisar (University Utara Malaysia, Malaysia)
DOI: 10.4018/jitn.2012040104
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Voice over Internet Protocol (VoIP) is growing rapidly during this decade. VoIP is seen as a short-term and long-term transmission for voice and audio traffic and is moving on Wireless Local Area Networks (WLANs) based on IEEE 802.11 standards. Currently, packet scheduling algorithms like Weighted Fair Queuing (WFQ), was mainly designed to provide the bandwidth reservation. The Strict Priority (SP) is low-cost to maintain the delay sensitive voice traffic. Also, a number of research scheduling solutions have been proposed like General processor sharing (GPS), Deficit Round Robin (DRR), Contention-Aware Temporally fair Scheduling (CATS). Unfortunately, the current scheduling won’t be able to handle the VoIP packets properly and they have drawbacks over real-time applications. The objective of this research is to propose a Fourth Stage of Voice Priority Queue (VPQ) packet scheduling and algorithm to ensure more throughput, fairness and efficient packet scheduling for VoIP performance of queues and traffics. A new scheduler flexible which is capable of satisfying the VoIP traffic flows. Experimental topologies on NS-2 network simulator were analyzed for voice traffic.
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Problem Statement

IP-based networks are managing voice, data, web browsing, email, and video applications on the same network flow over WLAN networks. They were not mainly designed for real-time transmission over WLAN networks and it can be a deadlock in the traffic flow over WLAN networks. We show a bottleneck topology of mixed mode traffic over WLAN network as in Figure 1.

Figure 1.

Bottleneck topology of mixed mode traffic over LAN networks


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