A Session-Based Management Architecture for QoS Assurance to VoIP Applications on Wireless Access Networks

Tebbani, Badis; Haddadou, Kamel; Pujolle, Guy

doi:10.1109/ccnc.2009.4784757

Cited by 3 publications

(1 citation statement)

References 9 publications

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“…Therefore, we defined the capacity for VoIP as the maximum number of wireless nodes so that both uplink and downlink delay do not exceed 60 ms. Moreover, as shown in our previous works [4,23], the uplink delay added less than 1 ms of transmission delay, which allows us to assume that the end-to-end delay is essentially the same as the downlink delay. We also defined the capacity for VoIP as the maximum number of wireless nodes so that the jitter delay did not exceed 10 ms, and therefore, the MOS did not fall below 3.6.…”

Section: Performance Evaluation Of Vowlan Servicesmentioning

confidence: 97%

Quality assurance of voice over WLANs (VoWLANs) with differentiated services

2010

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Several technical issues make commercial and large voice over wireless local area network (VoWLAN) services difficult to provide. The most challenging issue when voice over Internet Protocol (VoIP) services are ran over IEEE 802.11-based WLANs is the bandwidth inef f iciency due to the considerable overhead associated with WLAN packet transmission. In this work, we propose a session-based quality-of-service management architecture (SQoSMA) to overcome the low number of VoIP calls in IEEE 802.11 Wireless LANs and the negative effect of new call addition when the WLAN reaches its capacity. The SQoSMA combines data and control planes to detect VoWLAN QoS degradations and performs either an adaptive audio codec switching or a call stopping to fix VoWLAN issues in a differentiated services manner. In addition, our solution deals with user sessions information, by considering user priority (from its agreement) to guarantee a certain level of its multimedia applications. Performance evaluation using a real test-bed shows that call codec change and call stopping techniques can easily assure high-priority calls with acceptable call blocking probability.

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Section: Performance Evaluation Of Vowlan Servicesmentioning

confidence: 97%

Quality assurance of voice over WLANs (VoWLANs) with differentiated services

2010

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Performance Metrics for SIP-Based VoIP Applications Over DMO

Alshamrani¹,

Ali

2017

Advances in Wireless Technologies and Telecommunication

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The evaluation studies need to investigate a determined performance metrics to understand and evaluate the examined scenarios. SIP-based Voice over IP (VoIP) applications over MANET, which behaves in a way similar to Direct Mode of Operation (DMO) in mission Critical Communication Systems, have two main performance categories related to the Quality of Service (QoS). The main performance metrics that are considered for the evaluation processes in this research are the SIP end-to-end Performance metrics as defined by the RFC 6076. The main performance metrics are related to the registration, the call setup, and the call termination processes. In this research study, the SIP performance metrics are based on a single SIP proxy server. For voice data, the QoS evaluation is based on two methods: The Objective method and the Subjective method. The Objective method considers the traffic throughput, end-to-end delays, packet loss, and jitter, while the subjective method considers the Mean Opinion Score (MOS), which is mostly related to the end users' experiences during voice calls.

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QoS and Performance Evaluation for SIP-Based VoIP Over DMO

Alshamrani¹,

Ali

2017

Advances in Wireless Technologies and Telecommunication

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In this chapter, analyses for the performance metrics that define the quality of service (QoS) of SIP-based VoIP will be introduced. SIP-based VoIP applications over Direct Mode of Operation (DMO), which behaves in a way similar to Mobile Ad-hoc Network (MANET) systems, have three main performance categories related to the QoS. These categories are the SIP signaling, voice data transmission, and MANET routing. The SIP signaling controls the VoIP calls initiation, termination, and modifications. The major QoS parameters of VoIP that are managed by SIP signaling are the registration intervals, call setup time, and call termination time. These QoS parameters are increased in MANET due to the nodes' mobility that affects the routing calculations and the connectivity status. These necessitate mechanisms to reduce the delays in the MANET environment. The voice packets are transferred over the Real Time Protocol (RTP) which is encapsulated in the unreliable transport protocol using the User Datagram Protocol (UDP).

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A Session-Based Management Architecture for QoS Assurance to VoIP Applications on Wireless Access Networks

Cited by 3 publications

References 9 publications

Quality assurance of voice over WLANs (VoWLANs) with differentiated services

Quality assurance of voice over WLANs (VoWLANs) with differentiated services

Performance Metrics for SIP-Based VoIP Applications Over DMO

QoS and Performance Evaluation for SIP-Based VoIP Over DMO

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