Choosing the Right Audio Codecs for VoIP over cdma2000 Networks:

Save this PDF as:
 WORD  PNG  TXT  JPG

Size: px
Start display at page:

Download "Choosing the Right Audio Codecs for VoIP over cdma2000 Networks:"

Transcription

1 Choosing the Right Audio Codecs for VoIP over cdma2000 Networks: System capacity, Voice quality, Delay, and Transcoding issues Dr. Sassan Ahmadi NOKIA Inc. February 8, CDG VoIP Summit San Diego, CA/February 2005/Sassan Ahmadi

2 Outline Drivers and advantages of VoIP over cdma2000 networks Requirements for VoIP over cdma2000 networks Delay requirement Mobile-to-mobile delay, an example 3GPP2 standard codecs for VoIP System capacity Simulation parameters Simulation results Migration path to VoIP over cdma2000 networks Summary Appendix Definitions CDG VoIP Summit San Diego, CA/February 2005/Sassan Ahmadi

3 Drivers and Advantages of VoIP over cdma2000 Networks VoIP drivers Efficient use of system bandwidth as well as flexible technology. The use of standard packet network components and protocols with lower costs. Migration toward all-ip network architecture in general and adoption of 1x EV-DO by cdma operators as the next cdma air interface in particular. VoIP is the simplest and most efficient path to convergence of the Next Generation Networks. VoIP facilitates the introduction of rich multimedia services. Integration of voice, data, and other multimedia services simplifies network design, operation, and management. Convergence of various cellular/wireless/fixed network services CDG VoIP Summit San Diego, CA/February 2005/Sassan Ahmadi

4 Drivers and Advantages of VoIP over cdma2000 Networks Advantages of VoIP over CS voice services More flexible and efficient codec design The permissible encoding rates in existing cdma2000 codecs are restricted by the air-interface to either rate-set I or rate-set II. Discontinuous transmission cannot be used in cdma2000 CS voice services. Opportunity for cross-system interoperability. Opportunity for providing better voice quality. Existing cdma2000 CS voice services involve transcoding VoIP can offer transparent end-to-end transport, resulting in Lower end-to-end delay by eliminating transcoding Improving quality of service by avoiding quality degradation due to transcoding Reducing the complexity and cost of the gateways Ease of harmonization with other cellular/fixed network voice services CDG VoIP Summit San Diego, CA/February 2005/Sassan Ahmadi

5 Requirements for VoIP over cdma2000 Networks Match or exceed the quality of existing CS voice services. One-way delay equivalent to CS voice services is desirable. Match or exceed the capacity of CS voice over cdma2000 1x. Interoperability with other cellular and fixed networks to avoid transcoding is desirable. The evolutionary path should include an overlap period with the existing CS voice services to allow for smooth transition. Reasonable robustness and tolerance with respect to packet loss and jitter in the IP networks. Use and enhancement of IMS architecture to control and manage SIP/SDP based sessions and signaling. Some enhancements in the mobility management to overcome the limitations on the real-time services such as VoIP (e.g., handoffs). Compliance with regulatory services and requirements CDG VoIP Summit San Diego, CA/February 2005/Sassan Ahmadi

6 Delay Requirement ITU-T E-Model 100 Users very satisfied 90 E-model rating R Users satisfied Some users dissatisfied Many users dissatisfied Maximum Perceptually Tolerable Delay Mouth-to-ear-delay/ms Nearly all users dissatisfied G.114_F01 ITU- G.114 Determination of the effects of absolute one-way delay by the E-model CDG VoIP Summit San Diego, CA/February 2005/Sassan Ahmadi

7 Mobile-to-Mobile Delay An Example Encoder Encoder 1xEV-DO 1xEV-DO Modem Modem 1xEV-DO 1xEV-DO RAN RAN + PDSN PDSN 35 ms 5 ms RL H-ARQ Delay 60 ms 20 ms IP Network Included in capacity calculations 15 ms Decoder Decoder De-Jitter De-Jitter Buffer Buffer 1xEV-DO 1xEV-DO Modem Modem 1xEV-DO 1xEV-DO RAN RAN + PDSN PDSN 20 ms ms 5 ms 20 ms FL H-ARQ Delay (voice packet drop timer) 80 ms Transcoding delay has not been included ~ 40 ms CDG VoIP Summit San Diego, CA/February 2005/Sassan Ahmadi

8 3GPP2 Standard Codecs for VoIP 3GPP2 Standard Codec Wideband Speech Processing Capability Narrowband Speech Processing Capability Maximum Source Bit Rate (kbps) Operating cdma2000 Rate-Set Algorithmic Delay (ms) DTX Capability Interoperability with UMTS Codecs Multimode Functionality (Quality- Capacity Tradeoff) QCELP Rate-Set II 30.5 EVRC 8.55 Rate-Set I 33 SMV 8.55 Rate-Set I 35.5 VMR-WB Rate-Set I Rate-Set II UMTS/AMR-WB VMR-WB is the only 3GPP2 standard codec with flexible DTX capability VMR-WB is the only 3GPP2 standard codec with both wideband and narrowband processing capabilities VMR-WB is the only 3GPP2 standard codec that is interoperable with UMTS/AMR-WB codec at 12.65, 8.85, and 6.6 kbps CDG VoIP Summit San Diego, CA/February 2005/Sassan Ahmadi

9 System Capacity Simulation Parameters (1xEV-DO Rev. A) Parameters Channel model Preamble detection error DRC channel error ACK/NACK channel error H-ARQ RLP Retransmission Control Channel Overhead Multi-user packet Voice packet drop timer Target FER Voice traffic model RTP/UDP/IP Header Size Value Channel B Modeled Error free Error free Modeled Disabled t Modeled Modeled 80 ms 1% Fixed inter-arrival time of 20 ms 4 Bytes Comment As specified in [1] Typically 1/16 of the total capacity is allocated Timer starts from the time each voice packet arrives in BS buffer Forward Link Inter-arrival time between voice packets Average compressed header size for IPv6 Channel Model Multi-path Model # of Fingers Speed (km/h) Fading B Pedestrian B 3 10 Jakes [1] "1xEV-DO Evaluation Methodology (V1.4)," C , 3GPP2 WG3 DO Ad Hoc Group, October 2, CDG VoIP Summit San Diego, CA/February 2005/Sassan Ahmadi

10 System Capacity Simulation Results Our simulation methodology uses those parameters specified in the strawman [1,2] except Channel model Channel model B only was studied as some concerns were raised regarding the percentage of channel model A users in mixed channel environment Outage criteria Based on long-term FER Requirement: Less than 3% of all users in the system have long-term FER higher than 1% EVRC codec was used for the cdma2000 1x simulation. Channel Model cdma2000 1x Circuit-switched w/o RX Diversity (users/sector) VoIP over 1x EV-DO Rev. A w/o RX Diversity (users/sector) EVRC [Benchmark] ( DTX) EVRC* [Benchmark] (with DTX) VMR-WB Mode 0 (with DTX) VMR-WB Mode 4 (with DTX) Channel B VMR-WB mode 4 offers superior wideband quality while performing statistically equivalent to EVRC in narrowband operation, operating at an average data rate that is 8% lower than that of EVRC. [1] "1xEV-DO Evaluation Methodology (V1.4)," C , 3GPP2 WG3 DO Ad Hoc Group, October 2, 2004 [2] "1xEV-DV Evaluation Methodology Addendum (V14)," 3GPP2 WG5 Evaluation Ad Hoc, June 16, 2003 * te: The existing EVRC standard codec does not include DTX capability and this number represents only an estimate, should a DTX mechanism similar to that of VMR-WB be used for EVRC CDG VoIP Summit San Diego, CA/February 2005/Sassan Ahmadi

11 Migration Path to VoIP over cdma2000 Networks cdma2000 1x CS voice services Next Generation Networks VoIP over cdma2000 Networks CS voice as the main service VOIP as an add-on service VOIP as the main service VoIP over Fixed Networks CDG VoIP Summit San Diego, CA/February 2005/Sassan Ahmadi

12 Summary VoIP over cdma2000 networks is promising and can take off as early as 2H 2006 as an add-on service. cdma2000 1x system capacity and voice service quality can be matched or exceeded with certain assumptions. The use of RX diversity with 1xEV-DO Rev. A is one way to further increase the capacity gains. Harmonization of VoIP services across various cellular/fixed networks can be facilitated through the use of interoperable codecs (e.g., UMTS/AMR-WB, CDMA/VMR-WB), resulting in more efficient network design and operation by eliminating the transcoding. The 3GPP2 standard wideband/narrowband multimode speech codec, VMR-WB, provides unique functionalities that are ESSENTIAL to the success of VoIP over cdma2000 networks. 3GPP2 VMR-WB standard offers superior quality, DTX capability, and interoperability with UMTS/AMR-WB, at a system capacity that is comparable to that offered by other existing 3GPP2 standard codecs CDG VoIP Summit San Diego, CA/February 2005/Sassan Ahmadi

13 Thank You CDG VoIP Summit San Diego, CA/February 2005/Sassan Ahmadi

14 Appendix Definitions Narrowband speech codec: A vocoder that operates with 8 khz sampled input/output speech signals that are band-limited to Hz. Wideband speech codec: A vocoder that operates with 16 khz sampled input/output speech signals that are band-limited to Hz. The expanded audio bandwidth results in more intelligibility and naturalness and substantially improved quality of the speech signals. Discontinuous transmission (DTX): A mechanism that suppresses the encoding and transmission of inactive (silence) intervals in a speech signal, thus reducing the output data rate of the vocoder. Silence speech intervals are perceptually less significant and therefore the impact on speech quality is minimal. Transcoding: Extra decoding and encoding functions at the gateways to enable connection of different codecs at the end points. This process adds to the overall delay and degrades the speech quality. Interoperability: Capability of a vocoder to decode the speech data encoded by another codec without incorporating any transcoding mechanism. Multimode speech coding: Tradeoff between voice quality and system capacity through the use of multiple encoding schemes each operating at different bit rate CDG VoIP Summit San Diego, CA/February 2005/Sassan Ahmadi

Implementing VoIP over CDMA2000 1xEV- DO Rev A; Understanding System Performance and Requirements

Implementing VoIP over CDMA2000 1xEV- DO Rev A; Understanding System Performance and Requirements Implementing VoIP over CDMA2000 1xEV- DO Rev A; Understanding System Performance and Requirements CDG Tech Forum on VoIP November 4, 2004 Ivan N. Vukovic Motorola, Inc. Global Telecommunication Systems

More information

Circuit-Switched Voice Services over HSPA

Circuit-Switched Voice Services over HSPA Circuit-Switched Voice Services over HSPA 1 Qualcomm Incorporated, Corporate R&D San Diego, USA Abstract Circuit-Switched (CS) Voice Services over HSPA (CSoHS) was recently introduced for 3GPP WCDMA Release

More information

ARIB STD-T64-C.S0042 v1.0 Circuit-Switched Video Conferencing Services

ARIB STD-T64-C.S0042 v1.0 Circuit-Switched Video Conferencing Services ARIB STD-T-C.S00 v.0 Circuit-Switched Video Conferencing Services Refer to "Industrial Property Rights (IPR)" in the preface of ARIB STD-T for Related Industrial Property Rights. Refer to "Notice" in the

More information

Performance Evaluation of VoIP Services using Different CODECs over a UMTS Network

Performance Evaluation of VoIP Services using Different CODECs over a UMTS Network Performance Evaluation of VoIP Services using Different CODECs over a UMTS Network Jianguo Cao School of Electrical and Computer Engineering RMIT University Melbourne, VIC 3000 Australia Email: j.cao@student.rmit.edu.au

More information

Network administrators must be aware that delay exists, and then design their network to bring end-to-end delay within acceptable limits.

Network administrators must be aware that delay exists, and then design their network to bring end-to-end delay within acceptable limits. Delay Need for a Delay Budget The end-to-end delay in a VoIP network is known as the delay budget. Network administrators must design a network to operate within an acceptable delay budget. This topic

More information

VoIP over Wireless Opportunities and Challenges

VoIP over Wireless Opportunities and Challenges Prof. Dr. P. Tran-Gia VoIP over Wireless Opportunities and Challenges Universität Würzburg Lehrstuhl für verteilte Systeme H.323 RTP Codec Voice-over-IP over Wireless (VoIPoW) UDP IMS G723.1 SIP G729 HSDPA

More information

VoIP over 1xEv-DO Revision A CDG VoIP Summit. Robert Kerr Nortel Sr. Manager Access Product Evolution San Diego, Feb 8 05

VoIP over 1xEv-DO Revision A CDG VoIP Summit. Robert Kerr Nortel Sr. Manager Access Product Evolution San Diego, Feb 8 05 VoIP over 1xEv-DO Revision A CDG VoIP Summit Robert Kerr Nortel Sr. Manager Access Product Evolution San Diego, Feb 8 05 Presentation Topics 1. Why VoIP 2. Elements of a successful VoIP offering 3. VoIP

More information

VoIP Technologies Lecturer : Dr. Ala Khalifeh Lecture 4 : Voice codecs (Cont.)

VoIP Technologies Lecturer : Dr. Ala Khalifeh Lecture 4 : Voice codecs (Cont.) VoIP Technologies Lecturer : Dr. Ala Khalifeh Lecture 4 : Voice codecs (Cont.) 1 Remember first the big picture VoIP network architecture and some terminologies Voice coders 2 Audio and voice quality measuring

More information

ETSI TS 101 329-2 V1.1.1 (2000-07)

ETSI TS 101 329-2 V1.1.1 (2000-07) TS 101 329-2 V1.1.1 (2000-07) Technical Specification Telecommunications and Internet Protocol Harmonization Over Networks (TIPHON); End to End Quality of Service in TIPHON Systems; Part 2: Definition

More information

Voice over IP Implementation

Voice over IP Implementation Voice over IP Implementation Ruchi Prasad Director, Global CDMA Product Marketing November, 2004 VoIP Objectives Packetizing Traditional Voice Native VoIP On The Device Cost Savings Application Integration

More information

Nokia Networks. Voice over LTE (VoLTE) Optimization

Nokia Networks. Voice over LTE (VoLTE) Optimization Nokia Networks Voice over LTE (VoLTE) Optimization Contents 1. Introduction 3 2. VoIP Client Options 5 3. Radio Network Optimization 6 4. Voice Quality Optimization 11 5. Handset Power Consumption Optimization

More information

1xEV-DO + VoIP = CDMA Operator Advantage

1xEV-DO + VoIP = CDMA Operator Advantage 1xEV-DO + VoIP = CDMA Operator Advantage Randy Battat President and CEO Airvana, Inc. CDMA Americas Conference September 2005 1 Why VoIP? It s probably the most significant paradigm shift in the entire

More information

Clearing the Way for VoIP

Clearing the Way for VoIP Gen2 Ventures White Paper Clearing the Way for VoIP An Alternative to Expensive WAN Upgrades Executive Overview Enterprises have traditionally maintained separate networks for their voice and data traffic.

More information

ALCATEL CRC Antwerpen Fr. Wellesplein 1 B-2018 Antwerpen +32/3/240.8550; Suresh.Leroy@alcatel.be +32/3/240.7830; Guy.Reyniers@alcatel.

ALCATEL CRC Antwerpen Fr. Wellesplein 1 B-2018 Antwerpen +32/3/240.8550; Suresh.Leroy@alcatel.be +32/3/240.7830; Guy.Reyniers@alcatel. Contact: ALCATEL CRC Antwerpen Fr. Wellesplein 1 B-2018 Antwerpen +32/3/240.8550; Suresh.Leroy@alcatel.be +32/3/240.7830; Guy.Reyniers@alcatel.be Voice over (Vo) was developed at some universities to diminish

More information

An Introduction to VoIP Protocols

An Introduction to VoIP Protocols An Introduction to VoIP Protocols www.netqos.com Voice over IP (VoIP) offers the vision of a converged network carrying multiple types of traffic (voice, video, and data, to name a few). To carry out this

More information

Deployment Aspects for VoIP Services over HSPA Networks

Deployment Aspects for VoIP Services over HSPA Networks Nash Technologies Your partner for world-class custom software solutions & consulting Deployment Aspects for VoIP Services over HSPA Networks Jens Mueckenheim, Enrico Jugl, Thomas Wagner, Michael Link,

More information

IP-Telephony Quality of Service (QoS)

IP-Telephony Quality of Service (QoS) IP-Telephony Quality of Service (QoS) Bernard Hammer Siemens AG, Munich Siemens AG 2001 1 Presentation Outline End-to-end OoS of VoIP services Quality of speech codecs Network-QoS IntServ RSVP DiffServ

More information

Evaluating Data Networks for Voice Readiness

Evaluating Data Networks for Voice Readiness Evaluating Data Networks for Voice Readiness by John Q. Walker and Jeff Hicks NetIQ Corporation Contents Introduction... 2 Determining Readiness... 2 Follow-on Steps... 7 Summary... 7 Our focus is on organizations

More information

12 Quality of Service (QoS)

12 Quality of Service (QoS) Burapha University ก Department of Computer Science 12 Quality of Service (QoS) Quality of Service Best Effort, Integrated Service, Differentiated Service Factors that affect the QoS Ver. 0.1 :, prajaks@buu.ac.th

More information

Traffic Characterization and Perceptual Quality Assessment for VoIP at Pakistan Internet Exchange-PIE. M. Amir Mehmood

Traffic Characterization and Perceptual Quality Assessment for VoIP at Pakistan Internet Exchange-PIE. M. Amir Mehmood Traffic Characterization and Perceptual Quality Assessment for VoIP at Pakistan Internet Exchange-PIE M. Amir Mehmood Outline Background Pakistan Internet Exchange - PIE Motivation Preliminaries Our Work

More information

Scheduling for VoIP Service in cdma2000 1x EV-DO

Scheduling for VoIP Service in cdma2000 1x EV-DO Scheduling for VoIP Service in cdma2000 1x EV-DO Young-June Choi and Saewoong Bahk School of Electrical Engineering & Computer Science Seoul National University, Seoul, Korea E-mail: {yjchoi, sbahk}@netlab.snu.ac.kr

More information

Requirements of Voice in an IP Internetwork

Requirements of Voice in an IP Internetwork Requirements of Voice in an IP Internetwork Real-Time Voice in a Best-Effort IP Internetwork This topic lists problems associated with implementation of real-time voice traffic in a best-effort IP internetwork.

More information

Performance Comparison of Control-less Scheduling Policies for VoIP in LTE UL

Performance Comparison of Control-less Scheduling Policies for VoIP in LTE UL Performance Comparison of Control-less Scheduling Policies for VoIP in LTE UL Haiming Wang Nokia Device R&D/Wireless System Research Nokia (China) Investment Corporation Limited, 100176 Beijing, China

More information

The Evolution of 3G CDMA Wireless Networks. David W. Paranchych IEEE CVT Luncheon January 21, 2003

The Evolution of 3G CDMA Wireless Networks. David W. Paranchych IEEE CVT Luncheon January 21, 2003 The Evolution of 3G CDMA Wireless Networks David W. Paranchych IEEE CVT Luncheon January 21, 2003 Outline Past: cdma2000 1xRTT Present: 1xEV-DO What is it? How does it work? How well does it work? What

More information

Performance Evaluation of Quality of VoIP service over UMTS-UTRAN R99

Performance Evaluation of Quality of VoIP service over UMTS-UTRAN R99 Performance Evaluation of Quality of VoIP service over UMTS-UTRAN R99 Andrea Barbaresi, Andrea Mantovani Telecom Italia - Via G. Reiss Romoli, 274 I-1148 Torino (TO), Italy andrea.barbaresi@telecomitalia.it

More information

Mobile Wireless Overview

Mobile Wireless Overview Mobile Wireless Overview A fast-paced technological transition is occurring today in the world of internetworking. This transition is marked by the convergence of the telecommunications infrastructure

More information

Extended-rtPS Algorithm for VoIP Services in IEEE 802.16 systems

Extended-rtPS Algorithm for VoIP Services in IEEE 802.16 systems Extended-rtPS Algorithm for VoIP Services in IEEE 802.16 systems Howon Lee, Taesoo Kwon and Dong-Ho Cho Department of Electrical Engineering and Computer Science Korea Advanced Institute of Science and

More information

ARIB STD-T64-C.S0085-A v1.0. VoIP Codecs and Protocols. Revision A

ARIB STD-T64-C.S0085-A v1.0. VoIP Codecs and Protocols. Revision A ARIB STD-T64-C.S0085-A v1.0 VoIP Codecs and Protocols Revision A Refer to "Industrial Property Rights (IPR)" in the preface of ARIB STD-T64 for Related Industrial Property Rights. Refer to "Notice" in

More information

Voice and Fax/Modem transmission in VoIP networks

Voice and Fax/Modem transmission in VoIP networks Voice and Fax/Modem transmission in VoIP networks Martin Brand A1Telekom Austria ETSI 2011. All rights reserved Name : Martin Brand Position: Senior IT Specialist at A1 Telekom Vice Chairman ETSI TC INT

More information

Providing reliable and efficient VoIP over WCDMA

Providing reliable and efficient VoIP over WCDMA Providing reliable and efficient VoIP over WCDMA Mårten Ericson, Lotta Voigt and Stefan Wänstedt The architecture of the IP Multimedia Subsystem (IMS) defined by the Third Generation Partnership Project

More information

Simulative Investigation of QoS parameters for VoIP over WiMAX networks

Simulative Investigation of QoS parameters for VoIP over WiMAX networks www.ijcsi.org 288 Simulative Investigation of QoS parameters for VoIP over WiMAX networks Priyanka 1, Jyoteesh Malhotra 2, Kuldeep Sharma 3 1,3 Department of Electronics, Ramgarhia Institue of Engineering

More information

VoIP in 3G Networks: An End-to- End Quality of Service Analysis

VoIP in 3G Networks: An End-to- End Quality of Service Analysis VoIP in 3G etworks: An End-to- End Quality of Service Analysis 1 okia etworks P.O.Box 301, 00045 okia Group, Finland renaud.cuny@nokia.com Renaud Cuny 1, Ari Lakaniemi 2 2 okia Research Center P.O.Box

More information

Capacity of VoIP over HSDPA with Frame Bundling

Capacity of VoIP over HSDPA with Frame Bundling Capacity of VoIP over HSDPA with Frame Bundling Yong-Seok Kim Telecommunication Network Business Samsung Electronics Email: ys708.kim@samsung.com Youngheon Kim Telecommunication Network Business Samsung

More information

Combining Voice over IP with Policy-Based Quality of Service

Combining Voice over IP with Policy-Based Quality of Service TechBrief Extreme Networks Introduction Combining Voice over IP with Policy-Based Quality of Service Businesses have traditionally maintained separate voice and data networks. A key reason for this is

More information

Active Monitoring of Voice over IP Services with Malden

Active Monitoring of Voice over IP Services with Malden Active Monitoring of Voice over IP Services with Malden Introduction Active Monitoring describes the process of evaluating telecommunications system performance with intrusive tests. It differs from passive

More information

Performance Evaluation of AODV, OLSR Routing Protocol in VOIP Over Ad Hoc

Performance Evaluation of AODV, OLSR Routing Protocol in VOIP Over Ad Hoc (International Journal of Computer Science & Management Studies) Vol. 17, Issue 01 Performance Evaluation of AODV, OLSR Routing Protocol in VOIP Over Ad Hoc Dr. Khalid Hamid Bilal Khartoum, Sudan dr.khalidbilal@hotmail.com

More information

The Voice Evolution VoLTE, VoHSPA+, WCDMA+ and Quality Evolution. April 2012

The Voice Evolution VoLTE, VoHSPA+, WCDMA+ and Quality Evolution. April 2012 The Voice Evolution VoLTE, VoHSPA+, WCDMA+ and Quality Evolution April 2012 Qualcomm is a Leader in Wireless 2012 2013 2014 2015+ Rel-8 Rel-9 LTE (FDD&TDD Commercial) Rel-10 Rel-11 & Beyond LTE Advanced

More information

Measuring Data and VoIP Traffic in WiMAX Networks

Measuring Data and VoIP Traffic in WiMAX Networks JOURNAL OF TELECOMMUNICATIONS, VOLUME 2, ISSUE 1, APRIL 2010 Measuring Data and VoIP Traffic in WiMAX Networks 1 Iwan Adhicandra Abstract Due to its large coverage area, low cost of deployment and high

More information

4:3 VoIP Transmission in Fixed Wireless Access networks based on DECT Packet Radio Service

4:3 VoIP Transmission in Fixed Wireless Access networks based on DECT Packet Radio Service 4:3 VoIP Transmission in Fixed Wireless Access networks based on DECT Packet Radio Service Luis M. Contreras Francisco Escrihuela Alcatel España, Radio Communications Division Ramirez de Prado, 5 28045

More information

Understanding the Transition From PESQ to POLQA. An Ascom Network Testing White Paper

Understanding the Transition From PESQ to POLQA. An Ascom Network Testing White Paper Understanding the Transition From PESQ to POLQA An Ascom Network Testing White Paper By Dr. Irina Cotanis Prepared by: Date: Document: Dr. Irina Cotanis 6 December 2011 NT11-22759, Rev. 1.0 Ascom (2011)

More information

Curso de Telefonía IP para el MTC. Sesión 2 Requerimientos principales. Mg. Antonio Ocampo Zúñiga

Curso de Telefonía IP para el MTC. Sesión 2 Requerimientos principales. Mg. Antonio Ocampo Zúñiga Curso de Telefonía IP para el MTC Sesión 2 Requerimientos principales Mg. Antonio Ocampo Zúñiga Factors Affecting Audio Clarity Fidelity: Audio accuracy or quality Echo: Usually due to impedance mismatch

More information

Quality of Service Testing in the VoIP Environment

Quality of Service Testing in the VoIP Environment Whitepaper Quality of Service Testing in the VoIP Environment Carrying voice traffic over the Internet rather than the traditional public telephone network has revolutionized communications. Initially,

More information

Encapsulating Voice in IP Packets

Encapsulating Voice in IP Packets Encapsulating Voice in IP Packets Major VoIP Protocols This topic defines the major VoIP protocols and matches them with the seven layers of the OSI model. Major VoIP Protocols 15 The major VoIP protocols

More information

Assessing the quality of VoIP transmission affected by playout buffer scheme and encoding scheme

Assessing the quality of VoIP transmission affected by playout buffer scheme and encoding scheme Assessing the quality of VoIP transmission affected by playout buffer scheme and encoding scheme Miroslaw Narbutt, Mark Davis Communications Network Research Institute Dublin Institute of Technology Wireless

More information

CDMA and LTE. Technical & Commercial Implications of Interoperability. James Person COO CDMA Development Group. Dallas, TX November 2009

CDMA and LTE. Technical & Commercial Implications of Interoperability. James Person COO CDMA Development Group. Dallas, TX November 2009 CDMA and LTE Technical & Commercial Implications of Interoperability James Person COO CDMA Development Group Dallas, TX November 009 CDG Charter Formed in 1993, a consortium of operator and vendor companies

More information

Service resiliency and reliability Quality of Experience Modelling requirements A PlanetLab proposal. PDCAT'08 - Dunedin December 1-4, 2008

Service resiliency and reliability Quality of Experience Modelling requirements A PlanetLab proposal. PDCAT'08 - Dunedin December 1-4, 2008 PlaNetLab Options from Massey University Richard Harris Presentation Outline Service resiliency and reliability Quality of Experience Modelling requirements A PlanetLab proposal PDCAT'2008 Dunedin 2 (c)

More information

Introduction and Comparison of Common Videoconferencing Audio Protocols I. Digital Audio Principles

Introduction and Comparison of Common Videoconferencing Audio Protocols I. Digital Audio Principles Introduction and Comparison of Common Videoconferencing Audio Protocols I. Digital Audio Principles Sound is an energy wave with frequency and amplitude. Frequency maps the axis of time, and amplitude

More information

Voice over IP Protocols And Compression Algorithms

Voice over IP Protocols And Compression Algorithms University of Tehran Electrical and Computer Engineering School SI Lab. Weekly Presentations Voice over IP Protocols And Compression Algorithms Presented by: Neda Kazemian Amiri Agenda Introduction to

More information

Study of the impact of UMTS Best Effort parameters on QoE of VoIP services

Study of the impact of UMTS Best Effort parameters on QoE of VoIP services Study of the impact of UMTS Best Effort parameters on QoE of VoIP services Jose Oscar Fajardo, Fidel Liberal, Nagore Bilbao Department of Electronics and Telecommunciations, University of the Basque Country

More information

VoIP Analysis Fundamentals with Wireshark. Phill Shade (Forensic Engineer Merlion s Keep Consulting)

VoIP Analysis Fundamentals with Wireshark. Phill Shade (Forensic Engineer Merlion s Keep Consulting) VoIP Analysis Fundamentals with Wireshark Phill Shade (Forensic Engineer Merlion s Keep Consulting) 1 Phillip D. Shade (Phill) phill.shade@gmail.com Phillip D. Shade is the founder of Merlion s Keep Consulting,

More information

Indepth Voice over IP and SIP Networking Course

Indepth Voice over IP and SIP Networking Course Introduction SIP is fast becoming the Voice over IP protocol of choice. During this 3-day course delegates will examine SIP technology and architecture and learn how a functioning VoIP service can be established.

More information

Voice over IP Basics for IT Technicians

Voice over IP Basics for IT Technicians Voice over IP Basics for IT Technicians White Paper Executive summary The IP phone is coming or has arrived on desk near you. The IP phone is not a PC, but does have a number of hardware and software elements

More information

Priority-Coupling A Semi-Persistent MAC Scheduling Scheme for VoIP Traffic on 3G LTE

Priority-Coupling A Semi-Persistent MAC Scheduling Scheme for VoIP Traffic on 3G LTE Priority-Coupling A Semi-Persistent MAC Scheduling Scheme for VoIP Traffic on 3G LTE S. Saha * and R. Quazi ** * Helsinki University of Technology, Helsinki, Finland ** University of Dhaka, Dhaka, Bangladesh

More information

SPIRENT ABACUS SIP FOR VOIP AND IMS ABACUS 5000 IP TELEPHONY SIGNALING AND TRAFFIC GENERATOR

SPIRENT ABACUS SIP FOR VOIP AND IMS ABACUS 5000 IP TELEPHONY SIGNALING AND TRAFFIC GENERATOR SIP FOR VOIP AND IMS ABACUS 5000 IP TELEPHONY SIGNALING AND TRAFFIC GENERATOR The convergence of PSTN, VoIP over Fixed and Wireless Broadband, and Mobile networks to an all IP infrastructure enables service

More information

Digital Speech Coding

Digital Speech Coding Digital Speech Processing David Tipper Associate Professor Graduate Program of Telecommunications and Networking University of Pittsburgh Telcom 2720 Slides 7 http://www.sis.pitt.edu/~dtipper/tipper.html

More information

Comparison of Voice over IP with circuit switching techniques

Comparison of Voice over IP with circuit switching techniques Comparison of Voice over IP with circuit switching techniques Author Richard Sinden Richard Sinden 1 of 9 Abstract Voice-over-IP is a growing technology. Companies are beginning to consider commercial

More information

HD VoIP Sounds Better. Brief Introduction. March 2009

HD VoIP Sounds Better. Brief Introduction. March 2009 HD VoIP Sounds Better Brief Introduction March 2009 Table of Contents 1. Introduction 3 2. Technology Overview 4 3. Business Environment 5 4. Wideband Applications for Diverse Industries 6 5. AudioCodes

More information

Voice over IP (VoIP) Basics for IT Technicians

Voice over IP (VoIP) Basics for IT Technicians Voice over IP (VoIP) Basics for IT Technicians VoIP brings a new environment to the network technician that requires expanded knowledge and tools to deploy and troubleshoot IP phones. This paper provides

More information

Improving ertps Grant Allocation for VoIP Traffic in Silence Duration

Improving ertps Grant Allocation for VoIP Traffic in Silence Duration Improving ertps Grant Allocation for VoIP Traffic in Silence Duration S. Amir. Hoseini, S. Saed Rezaie, and H. Taheri Abstract This paper proposes a new uplink scheduling algorithm that can increase the

More information

Delivering reliable VoIP Services

Delivering reliable VoIP Services QoS Tips and Tricks for VoIP Services: Delivering reliable VoIP Services Alan Clark CEO, Telchemy alan.d.clark@telchemy.com 1 Objectives Clear understanding of: typical problems affecting VoIP service

More information

WHITEPAPER. Quality of Service Testing in the VoIP Environment

WHITEPAPER. Quality of Service Testing in the VoIP Environment Quality of Service Testing in the VoIP Environment March 2005 In recent years, the business world has reaped tremendous benefits from the many exciting products and applications made possible by the marriage

More information

QOS Requirements and Service Level Agreements. LECTURE 4 Lecturer: Associate Professor A.S. Eremenko

QOS Requirements and Service Level Agreements. LECTURE 4 Lecturer: Associate Professor A.S. Eremenko QOS Requirements and Service Level Agreements LECTURE 4 Lecturer: Associate Professor A.S. Eremenko Application SLA Requirements Different applications have different SLA requirements; the impact that

More information

B12 Troubleshooting & Analyzing VoIP

B12 Troubleshooting & Analyzing VoIP B12 Troubleshooting & Analyzing VoIP Phillip Sherlock Shade, Senior Forensics / Network Engineer Merlion s Keep Consulting phill.shade@gmail.com Phillip Sherlock Shade (Phill) phill.shade@gmail.com Phillip

More information

The 3GPP Enhanced Voice Services (EVS) codec

The 3GPP Enhanced Voice Services (EVS) codec Nokia Networks The 3GPP Enhanced Voice Services (EVS) codec Nokia Networks white paper The 3GPP Enhanced Voice Services (EVS) codec Contents Executive summary 3 1. Introduction 3 2. Evolution of 3GPP mobile

More information

A study of Skype over IEEE 802.16 networks: voice quality and bandwidth usage

A study of Skype over IEEE 802.16 networks: voice quality and bandwidth usage Iowa State University Digital Repository @ Iowa State University Graduate Theses and Dissertations Graduate College 2011 A study of Skype over IEEE 802.16 networks: voice quality and bandwidth usage Kuan-yu

More information

Optimizing Converged Cisco Networks (ONT)

Optimizing Converged Cisco Networks (ONT) Optimizing Converged Cisco Networks (ONT) Module 2: Cisco VoIP Implementations (Deploy) Calculating Bandwidth Requirements for VoIP Objectives Describe factors influencing encapsulation overhead and bandwidth

More information

QoS in VoIP. Rahul Singhai Parijat Garg

QoS in VoIP. Rahul Singhai Parijat Garg QoS in VoIP Rahul Singhai Parijat Garg Outline Introduction The VoIP Setting QoS Issues Service Models Techniques for QoS Voice Quality Monitoring Sample solution from industry Conclusion Introduction

More information

VoIP QoS on low speed links

VoIP QoS on low speed links Ivana Pezelj Croatian Academic and Research Network - CARNet J. Marohni a bb 0 Zagreb, Croatia Ivana.Pezelj@CARNet.hr QoS on low speed links Julije Ožegovi Faculty of Electrical Engineering, Mechanical

More information

VoIP Bandwidth Calculation

VoIP Bandwidth Calculation VoIP Bandwidth Calculation AI0106A VoIP Bandwidth Calculation Executive Summary Calculating how much bandwidth a Voice over IP call occupies can feel a bit like trying to answer the question; How elastic

More information

Configuration Guide. T.38 Protocol in AOS. 61950851L1-29.1D September 2011

Configuration Guide. T.38 Protocol in AOS. 61950851L1-29.1D September 2011 61950851L1-29.1D September 2011 Configuration Guide This configuration guide describes the T.38 fax protocol and its use on ADTRAN Operating System (AOS) voice products including a protocol overview, common

More information

Voice over IP: RTP/RTCP The transport layer

Voice over IP: RTP/RTCP The transport layer Advanced Networking Voice over IP: /RTCP The transport layer Renato Lo Cigno Requirements For Real-Time Transmission Need to emulate conventional telephone system Isochronous output timing same with input

More information

Network Traffic #5. Traffic Characterization

Network Traffic #5. Traffic Characterization Network #5 Section 4.7.1, 5.7.2 1 Characterization Goals to: Understand the nature of what is transported over communications networks. Use that understanding to improve network design Characterization

More information

Radio over Internet Protocol (RoIP)

Radio over Internet Protocol (RoIP) Radio over Internet Protocol (RoIP) Presenter : Farhad Fathi May 2012 What is VoIP? [1] Voice over Internet Protocol is a method for taking analog audio signals, like the kind you hear when you talk on

More information

White Paper ON Dual Mode Phone (GSM & Wi-Fi)

White Paper ON Dual Mode Phone (GSM & Wi-Fi) White Paper ON Dual Mode Phone (GSM & Wi-Fi) Author: N Group 1.0 Abstract Dual Mode Handset is in demand for converged Network, Access, Billing, and Operation environment. Dual mode handsets provide cost

More information

Mobility and cellular networks

Mobility and cellular networks Mobility and cellular s Wireless WANs Cellular radio and PCS s Wireless data s Satellite links and s Mobility, etc.- 2 Cellular s First generation: initially debuted in Japan in 1979, analog transmission

More information

Wireless Technologies for the 450 MHz band

Wireless Technologies for the 450 MHz band Wireless Technologies for the 450 MHz band By CDG 450 Connectivity Special Interest Group (450 SIG) September 2013 1. Introduction Fast uptake of Machine- to Machine (M2M) applications and an installed

More information

TDM services over IP networks

TDM services over IP networks Keyur Parikh Junius Kim TDM services over IP networks 1. ABSTRACT Time Division Multiplexing (TDM) circuits have been the backbone of communications over the past several decades. These circuits which

More information

Performance Analysis of Scheduling Algorithms

Performance Analysis of Scheduling Algorithms Performance Analysis of Scheduling Algorithms for VoIP Services in IEEE 82.1 6e Systems Howon Lee*, Taesoo Kwon*, Dong-Ho Cho*, Geunhwi Limt and Yong Changt *Department of Electrical Engineering and Computer

More information

IP QoS Interoperability Issues

IP QoS Interoperability Issues SP-030371 IP QoS Interoperability Issues Source: Contact: SBC Communications, BT Randolph Wohlert Randolph_Wohlert@labs.sbc.com 2 Industry Trend: IP Based Services Next Generation Networks Multi-service

More information

MULTI-STREAM VOICE OVER IP USING PACKET PATH DIVERSITY

MULTI-STREAM VOICE OVER IP USING PACKET PATH DIVERSITY MULTI-STREAM VOICE OVER IP USING PACKET PATH DIVERSITY Yi J. Liang, Eckehard G. Steinbach, and Bernd Girod Information Systems Laboratory, Department of Electrical Engineering Stanford University, Stanford,

More information

Mobile VoIP: Managing, scheduling and refining voice packets to and from mobile phones

Mobile VoIP: Managing, scheduling and refining voice packets to and from mobile phones Mobile VoIP: Managing, scheduling and refining voice packets to and from mobile phones MOHAMMAD ABDUS SALAM Student ID: 01201023 TAPAN BISWAS Student ID: 01201003 \ Department of Computer Science and Engineering

More information

PERFORMANCE ANALYSIS OF VOIP TRAFFIC OVER INTEGRATING WIRELESS LAN AND WAN USING DIFFERENT CODECS

PERFORMANCE ANALYSIS OF VOIP TRAFFIC OVER INTEGRATING WIRELESS LAN AND WAN USING DIFFERENT CODECS PERFORMANCE ANALYSIS OF VOIP TRAFFIC OVER INTEGRATING WIRELESS LAN AND WAN USING DIFFERENT CODECS Ali M. Alsahlany 1 1 Department of Communication Engineering, Al-Najaf Technical College, Foundation of

More information

IP Telephony (Voice over IP)

IP Telephony (Voice over IP) (Voice over IP) Instructor Ai-Chun Pang, acpang@csie.ntu.edu.tw Office Number: 417, New building of CSIE Textbook Carrier Grade Voice over IP, D. Collins, McGraw-Hill, Second Edition, 2003. Requirements

More information

Packetized Telephony Networks

Packetized Telephony Networks Packetized Telephony Networks Benefits of Packet Telephony Networks Traditionally, the potential savings on long-distance costs was the driving force behind the migration to converged voice and data networks.

More information

Broadband Networks. Prof. Dr. Abhay Karandikar. Electrical Engineering Department. Indian Institute of Technology, Bombay. Lecture - 29.

Broadband Networks. Prof. Dr. Abhay Karandikar. Electrical Engineering Department. Indian Institute of Technology, Bombay. Lecture - 29. Broadband Networks Prof. Dr. Abhay Karandikar Electrical Engineering Department Indian Institute of Technology, Bombay Lecture - 29 Voice over IP So, today we will discuss about voice over IP and internet

More information

VOICE-over-Internet protocol (VoIP) has made considerable

VOICE-over-Internet protocol (VoIP) has made considerable 36 IEEE JOURNAL ON SELECTED AREAS IN COMMUNICATIONS, VOL. 24, NO. 1, JANUARY 2006 An Analysis of VoIP Service Using 1 EV-DO Revision A System Qi Bi, Senior Member, IEEE, Pi-Chun Chen, Yang Yang, and Qinqing

More information

Skype over UMTS. Tobias Hoßfeld www3.informatik.uni-wuerzburg.de. University of Würzburg Informatik III (Distributed Systems) Prof. Dr. P.

Skype over UMTS. Tobias Hoßfeld www3.informatik.uni-wuerzburg.de. University of Würzburg Informatik III (Distributed Systems) Prof. Dr. P. Inmatik III () Prof. Dr. P. Tran-Gia Skype over UMTS Talk (25+5min) ITG Fachgruppe 5.2.4 VoIP over Wireless 15th May 2006, WürzburgW P2P Applications Across Mobile Networks When Do We Need Rate Control

More information

Agilent Technologies Performing Pre-VoIP Network Assessments. Application Note 1402

Agilent Technologies Performing Pre-VoIP Network Assessments. Application Note 1402 Agilent Technologies Performing Pre-VoIP Network Assessments Application Note 1402 Issues with VoIP Network Performance Voice is more than just an IP network application. It is a fundamental business and

More information

ADAPTIVE SPEECH QUALITY IN VOICE-OVER-IP COMMUNICATIONS. by Eugene Myakotnykh

ADAPTIVE SPEECH QUALITY IN VOICE-OVER-IP COMMUNICATIONS. by Eugene Myakotnykh ADAPTIVE SPEECH QUALITY IN VOICE-OVER-IP COMMUNICATIONS by Eugene Myakotnykh Ph.D. Dissertation Submitted to Faculty of the Telecommunications Program, Graduate School of Information Sciences, University

More information

Overcoming Barriers to High-Quality Voice over IP Deployments. White Paper

Overcoming Barriers to High-Quality Voice over IP Deployments. White Paper Overcoming Barriers to High-Quality Voice over IP Deployments White Paper White Paper Overcoming Barriers to High-Quality Voice over IP Deployments Executive Summary Quality of Service (QoS) issues are

More information

The Fax on IP Networks. White Paper February 2011

The Fax on IP Networks. White Paper February 2011 The Fax on IP Networks White Paper February 2011 2 The Fax on IP Networks Contents Overview... 3 Group 3 Fax Technology... 4 G.711 Fax Pass-Through... 5 T.38 IP Fax Relay... 6 Network Design Considerations...

More information

EV-DO Rev. A and B: Wireless Broadband for the Masses

EV-DO Rev. A and B: Wireless Broadband for the Masses Qualcomm Incorporated December 2007 Table of Contents [1] Introduction... 1 [2] The History of Mobile Broadband... 1 [3] EV-DO Rev. A Downlink, Uplink, VoIP and More... 1 3.1 New Class of Applications...

More information

Study of Best-Effort VoIP Handovers between WLAN and EVDO Networks

Study of Best-Effort VoIP Handovers between WLAN and EVDO Networks Study of Best-Effort VoIP Handovers between and EVDO Networks Amit P. Jardosh Rajeev Koodli Tat Chan Dept. of Computer Science, UCSB Nokia Research Center amitj@cs.ucsb.edu,rajeev.koodli@nokia.com Abstract-

More information

Knowledge Is Power: Do what s best for the client.

Knowledge Is Power: Do what s best for the client. Knowledge Is Power: Do what s best for the client. 1. Understanding Voice and Data Differences Even when they are carried on the same network, voice traffic and data traffic cannot be handled the same

More information

Cisco Networks (ONT) 2006 Cisco Systems, Inc. All rights reserved.

Cisco Networks (ONT) 2006 Cisco Systems, Inc. All rights reserved. Optimizing Converged Cisco Networks (ONT) reserved. Lesson 2.4: Calculating Bandwidth Requirements for VoIP reserved. Objectives Describe factors influencing encapsulation overhead and bandwidth requirements

More information

Advanced Networking Voice over IP: RTP/RTCP The transport layer

Advanced Networking Voice over IP: RTP/RTCP The transport layer Advanced Networking Voice over IP: RTP/RTCP The transport layer Renato Lo Cigno Requirements For Real-Time Transmission Need to emulate conventional telephone system Isochronous output timing same with

More information

White Paper. D-Link International Tel: (65) 6774 6233, Fax: (65) 6774 6322. E-mail: info@dlink.com.sg; Web: http://www.dlink-intl.

White Paper. D-Link International Tel: (65) 6774 6233, Fax: (65) 6774 6322. E-mail: info@dlink.com.sg; Web: http://www.dlink-intl. Introduction to Voice over Wireless LAN (VoWLAN) White Paper D-Link International Tel: (65) 6774 6233, Fax: (65) 6774 6322. Introduction Voice over Wireless LAN (VoWLAN) is a technology involving the use

More information

Simulation Platform for the Planning and Design of Networks Carrying VoIP Traffic

Simulation Platform for the Planning and Design of Networks Carrying VoIP Traffic Simulation Platform for the Planning and Design of Networks Carrying VoIP Traffic by Abdel Hernandez Rabassa B.Eng. (2000) A Thesis submitted to the Faculty of Graduate Studies and Research in partial

More information

Chapter 3 ATM and Multimedia Traffic

Chapter 3 ATM and Multimedia Traffic In the middle of the 1980, the telecommunications world started the design of a network technology that could act as a great unifier to support all digital services, including low-speed telephony and very

More information

Monitoring VoIP Call Quality Using Improved Simplified E-model

Monitoring VoIP Call Quality Using Improved Simplified E-model Monitoring VoIP Call Quality Using Improved Simplified E-model Haytham Assem, David Malone Hamilton Institute, National University of Ireland, Maynooth Hitham.Salama.2012, David.Malone@nuim.ie Jonathan

More information