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Network and service performance measurements are essential in IF (Internet Protocol) networks, e.g., for network management, network monitoring, and service quality assurance. In order to measure the service quality received by individual users, a service-specific measurement system is required. Therefore, this paper develops and implements the Network and Service Quality Measurement (NSQM) architecture,...
Wireless ad hoc networks are a collection of mobile nodes spreading over a defined geographical area, enabling realtime collaborative applications such as push-to-talk and VoIP. Unfortunately, wireless ad hoc networks suffer from limited bandwidth and QoS constraints. A proposed eXplicit MultiCAST (XCAST) based routing protocol (P-XCAST) is presented in this paper to support team-based communications...
The advent of IP communications challenged the use of legacy charging methods. Moreover, the diversity of Internet applications complicates the deployment of charging schemes in converged networks. Charging requires the collection of accounting information of resource usage, a process that consumes system resources that are needed for service delivery. Flat rate charging is popular on the Internet;...
As VoIP services proliferate due to rapid advances in technology and market demands, service providers are aggressively looking for better ways to offer VoIP services to customers including support of different codec technologies via a single network access point. This service flexibility introduces major traffic engineering challenges, especially when supporting a mix of data and voice services....
Reduction in the cost of the network infrastructure will always be a relevant and commercially important topic. There is a balance between cost and Quality of Service (QoS) that has been traditionally managed in a static manner. This is no longer an ideal situation as network traffic and configuration can change in a dynamic manner. This paper examines methods by which VoIP can be managed using a...
This paper presents the results of our computer simulation for delays experienced by voice packets over WiMAX 802.16e protocol running over an enterprise packet network connected to public internet. In the simulation we analyzed the effect of packet size, core network link speed, Internet service provider link speed, wireless network link speed, wireless distance, base station range, and distance...
Two of the major developments reshaping the telecommunications landscape are mobile wireless connectivity and the migration of voice telephone services to IP technology. These two ideas come together in networks that carry voice services over a wireless LAN (VoWLAN). The importance of usage of VoIP over wireless networks has been increasing, and a lot of research has been conducted to improve QoS...
Pervasive computing with voice application service must be providing unprecedented levels of technology in order to adapt the continually changed computing resources in ubiquitous environment. A number of conditions differ from the speech signal over IP network with heterogeneous devices while voice traffic is transported by packet-based in ubiquitous environment. In this paper, voice signals in packet...
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