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voip
(2509 results)-
Whitepapers
A Cross Layer Based Vertical Handoff Decision Making Framework
July 1, 2012 12:00am PDT
Emerging wireless communication technology focuses the development to provide the communication support for mobile devices based on the user demand and network connectivity for high-speed data...
Provided by: Bharathidasan University
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Whitepapers
Steganography in Audio Files by Entropy Using FEC as Reed - Solomon of VOIP Streams
July 1, 2012 12:00am PDT
In this paper, the authors introduce a novel technique to identify the voice (active frames) and silent regions (inactive frames) of a speech stream very much suitable for VoIP calls. Thus here...
Provided by: International Journal of Computer Applications
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Whitepapers
Comprehensive Comparison of VoIP SIP Protocol Problems and Cisco VoIP System
July 1, 2012 12:00am PDT
Voice over IP (VoIP), use of the packet switched internet for telephony, has improved substantially in the past few years. On the other hand, VoIP has many challenges that do not exist in the...
Provided by: Academy & Industry Research Collaboration Center
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Whitepapers
Impact of the Primary Resource Occupancy Information on the Performance of Cognitive Radio Networks With VoIP Traffic
June 20, 2012 12:00am PDT
In this paper, the relevance of considering the primary network resource occupancy information on the admission criterion of new secondary VoIP sessions in Cognitive Radio Networks (CRNs) is...
Provided by: ICST
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Whitepapers
Analysis of VoIP Traffic With Multiple Packet Transfer
June 16, 2012 12:00am PDT
Voice over Internet Protocol (VoIP) is a form of voice communication. Today Wireless LANs are providing a cost effective alternative for the voice communication. Initially the wireless access...
Provided by: IJCTT-International Journal of Computer Trends and Technology
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Whitepapers
A Trace-Based Feasibility Study of Infrastructure-Less VoIP
June 5, 2012 12:00am PDT
Voice over IP (VoIP) is one of the most popular Internet applications. Many VoIP protocols (e.g. SIP) are based on a central-server scheme in which a caller needs to query the central server first...
Provided by: National Cheng Kung University
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Whitepapers
Analysis and Performance Evaluation of Technique to Increase the Call Capacity of WLAN
June 1, 2012 12:00am PDT
WLANs have created the revolution in the field of communication. They replaced wired network by flexible wireless network. VoIP over IEEE 802.11 WLAN is one of the most growing technologies. WLANs...
Provided by: International Journal of Computer Technology and Electronics Engineering
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Whitepapers
Enhancing the QoS of a Voip Call Using an Adaptive Jitter Buffer Playout Algorithm With Variable Window Size
June 1, 2012 12:00am PDT
Transmitting real-time voice over the Internet is a technological challenge. Variation in network characteristics introduces jitter to the propagating voice packets. Jitter hampers voice quality...
Provided by: Academy & Industry Research Collaboration Center
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Whitepapers
Optimizing Service Differentiation Scheme with Sized-Based Queue Management in DiffServ Networks
June 1, 2012 12:00am PDT
In this paper, the authors introduced Modified Sized-based Queue Management as a dropping scheme that aims to fairly prioritize and allocate more service to VoIP traffic over bulk data like FTP as...
Provided by: University Press
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Whitepapers
Congestion Control in 4G Wireless Networks Using Coalition Game
June 1, 2012 12:00am PDT
In 4G-domain multi home Mobile Host (MH) will have access to different wireless networks. In this 4G wireless networks real time applications are initiated to support services like VOIP,...
Provided by: mecs-press
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Whitepapers
Global State-Dependent QoE Based Routing
May 24, 2012 12:00am PDT
For years, wireless network systems have been trying to satisfy end-users and support high quality multimedia applications such as Mobile TV, VoIP, etc. Combining wireless networks with multimedia...
Provided by: University of Pardubice
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Whitepapers
Same But Different? - Using Speech Signal Features for Comparing Conversational VoIP Quality Studies
May 24, 2012 12:00am PDT
In this paper, the authors demonstrate how speech signal features can be used to detect and explain differences in human to human conversation tests. To this end, they compare the results of two...
Provided by: Deutsche Telekom
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Whitepapers
A_PSQA: PESQ-Like Non-Intrusive Tool for QoE Prediction in VoIP Services
May 24, 2012 12:00am PDT
Perceived speech quality, or Quality of Experience (QoE), is the key criteria for evaluating VoIP service. Most of the existing solutions are intrusive, in a sense where they require both the...
Provided by: University of Reims Champagne Ardenne
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Whitepapers
An Efficient Search Method for the Content-Based Identification of Telephone-SPAM
May 24, 2012 12:00am PDT
With the help of VoIP technology, large numbers of unsolicited calls can be conveniently placed and SPAM over Internet Telephony may become a major nuisance and threat. Various mitigation methods...
Provided by: Institute of Electrical & Electronic Engineers
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Whitepapers
Voice Call Capacity Analysis and Enhancement of IEEE 802.11 WLAN
May 23, 2012 12:00am PDT
In the past few decades Voice over Internet Protocol (VoIP) is gaining a lot of attention due to the tremendous growth of the public internet leading the way into the IP world of communication....
Provided by: EuroJournals
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White Papers
A Taxonomy of Cross Layer Routing Metrics for Wireless Mesh Networks
May 21, 2012 12:00am PDT
Multi-hop, multi-channel, and multi-radio Wireless Mesh Networks (WMNs) are emerging as promising field of wireless technology with self-organizing and self-healing features for internet and real...
Provided by: Springer Science+Business Media
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Whitepapers
Performance Analysis of DiffServ Based Quality of Service in a Multimedia Wired Network and VPN Effect Using OPNET
May 17, 2012 12:00am PDT
Quality of Service (QoS) techniques are applied in IP networks to utilize available network resources in the most efficient manner to minimize delays and delay variations (jitters) in network...
Provided by: Cornell University
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Whitepapers
Load Balancing in IP/MPLS Networks: A Survey
May 15, 2012 12:00am PDT
The present era has witnessed tremendous growth of the Internet and various applications that are supported by it. There is an enormous pressure on Internet Service Providers (ISPs) to make...
Provided by: Scientific Research
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Whitepapers
Simulation of VoIP Over UDP With Bandwidth on Demand Analysis
May 10, 2012 12:00am PDT
This paper analyses resource provisioning for enterprise Voice-over-IP (VoIP) networks. Simulation and analytical methods are used to enhance the provisioning process, which ultimately aims to...
Provided by: International Journal of Computer Science and Communication Networks (IJCSCN)
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Whitepapers
A Call Admission Control Scheme for Multimedia Support Over IEEE 802.11 Wireless LANs
May 9, 2012 12:00am PDT
These days there is an increasing interest for VoIP over wireless LANs. QoS support for real-time services like voice in the IEEE 802.11 WLAN is an important issue. Since, IEEE 802.11 uses...
Provided by: Interscience Open Access Journals
