Comparative assessment of WiMAX scheduler in fixed and mobile WiMAX networks for VoIP using QualNet

Khirwar, Isha; Yadav, Abhinav; Trivedi, Preeti

doi:10.1109/iccct.2010.5640399

Cited by 8 publications

(6 citation statements)

References 3 publications

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“…Other than that, the comparison on the common weight-based scheduling algorithms was presented in [16,17]. WRR that works on the minimum reserved traffic rate and weighted fair queue (WFQ) which is associated with processing finishing time were compared in IEEE 802.16 network in [16,17]. In [18], the authors adopted the earlier deadline first (EDF) scheduling algorithm for uplink rtPS packets to avoid the delay violation.…”

Section: Related Research Workmentioning

confidence: 99%

“…The algorithms follow the QoS precedence prepared in [2]. Other than that, the comparison on the common weight-based scheduling algorithms was presented in [16,17]. WRR that works on the minimum reserved traffic rate and weighted fair queue (WFQ) which is associated with processing finishing time were compared in IEEE 802.16 network in [16,17].…”

Section: Related Research Workmentioning

confidence: 99%

“…No other factors will be taken into the consideration except service class precedence, the bandwidth demand, and the available bandwidth. This algorithm is simple and typically used by many researchers, e.g., [3,8,16] and [29,30].…”

Section: Scenario 1: 64 Qam Modulation Scheme Onlymentioning

confidence: 99%

“…16, convergence sublayer maps upper layer packets to IEEE 802.16 protocol data unit when packets arrived from internet protocol (IP) or asynchronous transfer mode networks; in vice versa process, packets are received from physical layer (PHY). Packets from upper layer are mapped and categorized into five different service classes: unsolicited grant service (UGS), extended real-time polling service (ertPS), real-time polling service (rtPS), non-real-time polling service (nrtPS), and best effort (BE).…”

Section: Introductionmentioning

confidence: 99%

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Discretionary bandwidth granting scheme for homogenous real-time applications

Wee

Roslee

Tan

et al. 2013

J Wireless Com Network

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IEEE 802.16e is an advanced wireless access technology that provides high-speed data transmission in long distance and offers quality of service (QoS) to subscribers. The provisioning of QoS is one of the great features by IEEE 802.16 to support both real-time and non-real-time applications. In IEEE 802.16, the common part sublayer in the MAC layer is responsible for maintaining the QoS services. There are many functions in the common part sublayer; the most popular topics discussed by researchers are the uplink and downlink scheduling algorithms. Many discussions had been made and focused on these two classes of schedulers. Another equally important component but overlooked so far is the bandwidth request and grant module. Bandwidth request and grant module arbitrates the amount of bandwidth to be granted, besides handling the bandwidth requests. This bandwidth request and grant process has always been developed in a conventional way, and its importance has been underestimated. In addition, the bandwidth distribution within a same service class or category also attracted little attention thus far. Many algorithms for interclass scheduling have been studied and proposed but not as much for intraclass scheduling. However, in bandwidth request and grant process, constraints on the required knowledge by the schedulers limit the intraclass scheduling algorithms to be applied onto them. We view the bandwidth request and grant process as an important part of the QoS architecture. In this paper, we proposed a new bandwidth granting scheme for the bandwidth request and granting process, which enables bandwidth to be fairly granted based on the necessity to all the requests from the same service class or category. By applying our scheme, significant improvements have been observed and recorded. Experiment results have proven and confirmed the effectiveness of our proposed scheme as compared to the conventional scheme.

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Section: Related Research Workmentioning

confidence: 99%

Section: Related Research Workmentioning

confidence: 99%

Section: Scenario 1: 64 Qam Modulation Scheme Onlymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Discretionary bandwidth granting scheme for homogenous real-time applications

Wee

Roslee

Tan

et al. 2013

J Wireless Com Network

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“…VoIP [5] represents the next generation in communication services. By moving voice services to the data network, we eliminate a separate, managed voice infrastructure and dramatically reduce the cost of telephone moves, add and changes.…”

Section: Overview Of Voipmentioning

confidence: 99%

Characteristic Analysis of VoIP Traffic for Wireless Networks in Comparison with CBR using QualNet Network Simulator

Ganiga¹,

Muniyal²,

Pradeep³

2012

IJCA

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Voice over Internet Protocol (VoIP) is one of the most important technologies in the world of communication.Around 20 years of research on VoIP, some Quality of Service (QoS) problems of VoIP are still remaining. During the past decade and with growing of wireless technologies, we have seen that many papers turn their concentration from Wired-LAN to Wireless-LAN. VoIP over Wireless LAN (WLAN) faces many challenges, due to the loose nature of wireless network. Issues like providing QoS at a good level, dedicating capacity for calls and having secure calls is more difficult rather than wired LAN. Therefore VoIP over WLAN (VoWLAN) remains a challenging research topic. Popularity of Voice over IP (VoIP) application such as Google Talk, Skype and MSN Messenger is making VoIP over WiMAX an eye-catching market and a driving force for both carriers and equipment suppliers. In this paper experimentally measured VoIP traffic and CBR traffic over the WiMAX network by using the different routing algorithm using QualNet 4.5.1 network simulation tool. In addition, this paper also shows that VoIP application can be best served with WiMAX rather than the CBR. Future work will involve simulating scenarios that are closer to the real world models. General TermsVoice over Internet Protocol, Routing Protocol, QualNet Simulator.

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