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Traffic engineering and QoS optimization of integrated voice & data networks
This book describes, analyzes, and recommends traffic engineering (TE) and quality of service (QoS) optimization methods for integrated voice/data dynamic routing networks. These functions control a network's response to traffic demands and other stimuli, such as link failures or node failures. TE and QoS optimization is concerned with measurement, modeling, characterization, and control of network traffic, and the application of techniques to achieve specific performance objectives. The scope of the analysis and recommendations include dimensioning, call/flow and connection routing, QoS resource management, routing table management, dynamic transport routing, and operational requirements. Case studies are included which provide the reader with a concrete way into the technical details and highlight why and how to use the techniques described in the book.
* Includes Case Studies of MPLS & GMPLS Network Optimization* Presents state-of-the-art traffic engineering and quality of service optimization methods and illustrates the tradeoffs between the various methods discussed* Contains practical Case Studies based on large-scale service provider implementations and architecture plans * Written by a highly respected and well known active expert in traffic engineering and quality of service
eBook
CVOICE 8.0: Implementing Cisco Unified Communications Voice over IP and QoS v8.0, Study Guide
A complete study guide to the new, must-have certification for VoIP professionalsVoIP and convergence are hot topics, and the CVOICE exam targets candidates looking to take the CCNA Voice Enterprise option in their pursuit of advanced certification. Companies continue to add VoIP service at a record pace, and network administrators are ramping up their skills. This new member of the Sybex Study Guide series covers everything you'll need to know to pass the certification exam for the newest component of the CCNA group, CVOICE.VoIP (Voice over IP) is rapidly becoming a preferred solution for companies, and Cisco has responded to the need with a new certification to assure proficiency in VoIP technologyPrepares IT professionals for the CVOICE 8.0 exam and includes a CD with the Sybex Test Engine, flashcards, the Glossary in PDF format, and sample video walkthroughs from the author.Covers gateway components, dial plans, basic operation and components of VoIP, how to implement a gateway, the function and interoperation of gatekeepers, how to implement an IP-to-IP gateway, and moreAdministrators of Cisco VoIP networks will find all the essential tools for CVOICE exam success in CVOICE: Cisco Voice Over IP Study Guide.
eBook
Enhancing VoIP BW Utilization over ITTP Protocol
The revolution of Voice over Internet Protocol (VoIP) technology has propagated everywhere and replaced the conventional telecommunication technology (e.g. landline). Nevertheless, several enhancements need to be done on VoIP technology to improve its performance. One of the main issues is to improve the VoIP network bandwidth (BW) utilization. VoIP packet payload compression is one of the key approaches to do that. This paper proposes a new method to compress VoIP packet payload. The suggested method works over internet telephony transport protocol (ITTP) and named Delta-ITTP method. The core idea of the Delta-ITTP method is to find and transmit the delta between the successive VoIP packet payloads, which is typically smaller than the original VoIP packet payload. The suggested Delta-ITTP method implements VoIP packet payload compression at the sender side and decompression at the receiver side. During the compression process, the Delta-ITTP method needs to keep some values to restore the original VoIP packet payload at the receiver side. For this, the Delta-ITTP method utilizes some of the IP protocol fields and no additional header is needed. The Delta-ITTP method has been deployed and compared with the traditional ITTP protocol without compression. The result showed that up to 19% BW saving was achieved in the tested cases leading to the desired enhancement in the VoIP network BW utilization.
Journal Article
ITTP-PG: A Novel Grouping Technique to Enhance VoIP Service Bandwidth Utilization
Recently, the field of telecommunications started to migrate to Voice over Internet Protocol (VoIP) service. VoIP service applications produce packets with short payload sizes to reduce packetization delay. That is, increasing the preamble size and expends the network link bandwidth. Packet grouping is a technique to enhance the employment of network link bandwidth. Numerous grouping techniques are suggested to enhance link bandwidth employment when using RTP/UDP protocols. Unlike previous research, this article suggests a packet grouping technique that works over the Internet Telephony Transport Protocol (ITTP), not RTP/UDP. This technique is called ITTP Packet Grouping (ITTP-PG). The ITTP-PG technique groups VoIP packets, which exist in the same route, in a single ITTP/IP preamble instead of an ITTP/IP preamble to each packet. Consequently, preamble size is diminished and network link bandwidth is saved. ITTP-PG also adds 3-byte runt-preamble to each packet to distinguish the grouped packets. The suggested ITTP-PG technique is simulated and compared with the conventional ITTP protocol (without grouping) using three elements, namely, the number of concurrent VoIP calls, preamble overhead, and bandwidth usage. Based on all these elements, the ITTP-PG technique outperforms the conventional ITTP protocol. For example, the result shows that bandwidth usage improved by up to 45.9% in the tested cases.
Journal Article
Skyping the family : interpersonal video communication and domestic life
\"This collection is one of the first in-depth studies of video calling in family and domestic life. It explores the reasons that people themselves provide to explain their video calling, investigates how these reasons make that calling accountable and how, in turn, these reasons come to be things talked about in the calls themselves. The research shows how video calling is part of the currency of contemporary family affection: such calls are not just about keeping in touch, they are a way of loving too; and they are sometimes a way of fighting as well. 'Skyping' or 'Facetiming' might be frequent and can seem mundane - just a question of routine - but what they entail is a measure of important things to families. This makes this collection of interest to anyone concerned with family life and the evolving ways in which technology has a role in it. Originally published as a special issue of Pragmatics 27:3 (2017)\"-- Provided by publisher.
Book
Quadruple Play Communication with System Integration in VoIP University
VoIP University is a solution to enable the development of communication projects based on IP protocol. This paper presents a low-cost deployment called VoIP UEMA, the first project of VoIP University solution. The technical feasibility of this project was checked as proof of concept. The concept was proven showing it is possible to create user extensions with some information such as name, ID, job role, course, center, and campus getting information of all registered users in the academic and administration system server to make voice and video calls through Android application and browser web phone. A mean opinion score test that measures subjective voice quality for a call was done with 35 people calling each other using two VoIP UEMA softphones, VoIP UEMA application, and VoIP UEMA web phone. The result achieved a weighted average of 3.5, indicating good-quality calls. The low-cost aspect was justified by a financial analysis showing the annual phone bill expenses dropped, representing savings of over 97 %.
Journal Article