Adding value to IMS multimedia telephony

Save this PDF as:
 WORD  PNG  TXT  JPG

Size: px
Start display at page:

Download "Adding value to IMS multimedia telephony"

Transcription

1 Clearly separating value-added services Adding value to IMS multimedia telephony How service developers can focus on adding new value to IMS telephony for both users and operators without having to apply basic SIP. ROGIER NÖLDUS, MARTIEN HUIJSMANS, ANDERS RYDE AND JONAS FALKENÅ Multimedia communication s based on IMS and standards for multimedia telephony () provide support for voice-over-lte (VoLTE) and a basic set of telephony services. IMS/ make multimedia functions possible, so that users can add or remove services and callers during an ongoing communication session. For example, a user can start a communication session with messaging, complement it with voice or video, add or remove participants, send files, share pictures and more. A primer on IMS applications can be found in the IMS Application Developer s Handbook 1. On top of this architecture, operators can provide virtually any service that adds value for the user and takes their offering to the next level. The key to maximizing the potential of value-added services (VASs), and consequently revenue, is to create a clear separation between VAS, and the underlying IMS/ architecture, as well as an appropriate API between the valueadded service and this architecture. This new approach builds on the innovative use of existing protocols, such as SIP and Parlay X, and is an efficient way for operators to deploy valueadded services in an environment and support them in their efforts BOX A Terms and abbreviations 3G 3GPP A API AS AXE BCS BICC CAMEL CS CSCF DTAP EPC ETSI/ TISPAN Gm GSM 3rd-generation wireless telephone technology 3rd Generation Partnership Project reference point between MSC and radio-access for GSM access application programming interface application server Automatic Cross-Connection Equipment Business Communication Suite Bearer-Independent Call Control customized applications for mobile -enhanced logic CAMEL application part circuit-switched Call Session Control Function direct transfer application part Evolved Packet Core European Telecommunications Standards Institute/Telecoms and Internet Converged Services and Protocols for Advanced Networks reference point between and CSCF Global System for Mobile Communications gsmssf GSM service switching function HSS I2 I-CSCF ICS IFC IMS IM-SSF IN IP ISDN ISUP Iu LTE Ma Mb Mg Mr MRF MS Home Subscriber Server reference point between S-CSCF and MSC enhanced for ICS Interrogating CSCF IMS centralized service initial filter criteria IP Multimedia Subsystem IMS service switching function intelligent Internet Protocol IMS service control interface integrated services digital ISDN User Part reference point between MSC and 3G radio-access Long Term Evolution reference point between I-CSCF and SIP-AS reference point to IP services reference point between MGCF and CSC multimedia telephony reference point between S-CSCF and Media resource function controller multimedia resource function mobile station Multimedia Telephony NGIN P-CSCF SCP S-CSCF SDS Sh SIP SIP-AS SRVCC T UCIF VAS VCC VoIP VoLTE VPN WLAN Application Server reference point between CSCF and CSCF Ericsson Next Generation Intelligent Network proxy call session control function service centralization and continuity-as service control point serving CSCF service domain selection reference point between SIP-AS and HSS Session Initiation Protocol SIP application server single radio VCC Transaction Capabilities Application Part Unified Communications Interoperability Forum user equipment value-added services voice call continuity voice-over-ip voice-over-lte virtual private wireless local area

2 to maintain a leading position in mobile-communication s. FIGURE 1 in the IMS Background The IMS core provides communication connectivity among subscribers but, to match the service provided by legacy circuit-switched technologies, IMS needs to be complemented with a set of basic telephony services, on top of which a host of advanced real-time services can be added. The combination of IMS communication connectivity and these basic services is known as. is access-independent, meaning that it is compatible with all VoIP-capable IP-based access technologies, such as LTE in combination with Evolved Packet Core (EPC); Ethernet; and WLAN technology. An in-depth analysis of is available in an Ericsson white paper 2. Figure 1 provides a basic view of services in an IMS, showing only the most important reference points. The same core- architecture is used for all services in IMS, including value-added services. The and Ma reference points are the main interfaces for service logic in IMS. The reference point enables the serving CSCF (S-CSCF) to invoke a service when handling a SIP session. In this case, that service is an originating/terminating service, in a SIP application server (SIP-AS) which is based on initial filter criteria (IFC) forming part of the subscriber s IMS service profile. The IFC specifies the conditions under which the S-CSCF should invoke a service in a SIP-AS. All details required for the service invocation, such as SIP-AS address and service identification, are included in the IFC. The IFC is, if provisioned, received by the S-CSCF from the HSS during the registration of the subscriber in IMS. When a service in the SIP- AS is invoked, the SIP signaling is routed through the SIP-AS. The service logic has full control over the SIP session and requires support for SIP signaling and SIP state models. It can release the SIP session, create additional SIP sessions (such as for parallel alerting), establish a temporary SIP session with MRF for the purpose of playing an announcement to the user, or retarget the SIP session. All SIP messages for the SIP session are transmitted / Ma Gm IP access Gm CSCF Mr Mb Sh through the SIP-AS. Fortunately, SIP is designed so that new SIP headers can be introduced without affecting operational systems such as value- added services. IFC-based service invocation allows for service chaining: two or more IMS services or service components, residing in a single SIP-AS or in different ones, can be invoked sequentially from the S-CSCF. Two ways of augmenting Returning to the scenario in which is used for telephony, the reference point is specified for applying telephony as an application in IMS. Through the reference point, has full control over the SIP session and, as a result, over the multimedia telephony session. is therefore an intrinsic part of the provision of telephony. As mentioned, when telephony is enhanced with value-added services, the VAS itself should not have to handle basic call control, but rather the enhancements only. Two scenarios, shown in Figure 2 and Figure 3 respectively, apply for augmenting or enhancing with VAS. Chaining VAS and provides only limited capability to augment the session. It would be possible for the added service to control certain parts of the session by replicating the corresponding service and then adapting it to suit its specific requirements., however, builds on a complex state model of specified interaction between different supplementary services, making it difficult to break up the service while still conforming to requirements. In addition, the added service would need to access the profile (in ) and might HSS MRF Basic connectivity Multimedia telephony be affected by future extensions in the standard. The value-added service shown in Figure 3 could be an enterprise service such as Business Communication Suite (BCS) or another service deployed on the Ericsson Composition Engine on top of the Multimedia Telephony Application Server (). The service-logic invocation is essentially unaffected. The execution of the service logic follows the standardized process. At designated points in this service logic, the VAS can influence execution. The interworking between and the IMS core, including entities such as CSCF, HSS and MRF, is not affected. Figure 3 shows a clean separation between the core for telephony and the VAS layer. Again, the valueadded service interacts with to enhance the call; it does not apply basic call control. The VAS connects to through a northbound interface from (in this case the Parlay X protocol), rather than using the reference point. In this way, the service does not need to replicate basic call control. This is aligned with the concept of separating basic call control and value-added services in circuit-switched s. The approach also simplifies interoperability testing, as basic call handling is not affected by VAS implementation and vice versa. is becoming increasingly intertwined with advanced features such as IMS centralized service (ICS) and SRVCC. This is a further argument for the proposed architecture, which is designed to create an interface that is clear, isolating the core and

3 Clearly separating value-added services FIGURE 2 Augmenting by using IFC chaining Core for basic telephony Value added service layer Core for basic telephony its control layer from the service layer. The is a functional entity that facilitates the session centralization and session continuity (access transfer between LTE and 3G). The VoLTE standard is based on these standardized functional entities. To allow mass-market deployment of telephony over LTE, and are provided on scalable, high-availability telecom servers such as. The architecture in Figure 4 shows how VoLTE/ can be augmented with VAS from the BCS. Parlay X between and BCS provides the capabilities required for enhancing the multimedia telephony session. The value-added service, BCS in this case, uses Parlay X for tasks such as issuing notifications about actions including access or device transfer informing the BCS when, for example, the subscriber has changed from LTE access to CS access. S-CSCF FIGURE 3 Augmenting with VAS by using s northbound interface VAS Parlay X (SIP) S-CSCF VAS VAS protocol Control plane signaling for basic telephony The architecture shown here is, in principle, applicable to any value-added service, such as multimedia ringback tone and other such services in the Ericsson NGIN suite of applications, which can be deployed on the Ericsson Composition Engine. Integration of CAMEL services with Legacy services must be taken into account when integrating VAS with. In particular, a legacy IN service, specifically a CAMEL service, may need to be invoked for a multimedia session established in IMS. To benefit from the flexibility and power of IMSbased multimedia communication, a new breed of value-added service is required. However, to safeguard extensive investments in CAMEL service development and deployment, a methodology is required to utilize this investment during the transition period to an environment. The IM-SSF is a functional component for the application of legacy services in an IMS. A stand-alone IM-SSF is not suitable when deploying legacy systems in an IMS. Instead, the integration of a gsmssf within is recommended. The gsmssf then takes on the role of an IM-SSF (albeit not a stand-alone one). Figure 5 shows how an existing CAMEL service can be integrated with. The gsmssf component integrated with the execution engine exposes a standardscompliant interface to the legacy CAMEL phase 2 service. This minimizes the impact on the CAMEL service. Subscription data needed for invoking the CAMEL service from service execution forms part of the subscription data contained in the HSS. Invocation of a legacy VAS as depicted in Figure 5 can be combined with invocation of the legacy VAS directly from the GSM/3G core (not depicted) using the T relay method as described for dynamic service domain selection (SDS). The method shown in Figure 5 provides a clean separation between telephony ( in IMS) and value-added services (CAMEL). The legacy CAMEL service can then be used in combination with advanced IMS features such as SRVCC, including the enhancements provided in 3GPP Rel-10. These improvements include session continuity during the call-establishment phase and continuity of mid-call state by, for example, call-hold state. Handling VAS on IMS services over legacy access Value-added services can also be applied on IMS services over legacy access; the conceptual architecture is shown in Figure 6. The capability for VAS to control calls in the GSM/3G without anchoring the GSM/3G call in IMS will remain important for the foreseeable future (five to ten years). It allows operators to deploy (IMS, VoLTE) and benefit from the flexibility and power of nextgeneration VAS. This capability allows operators to continue to control calls in the GSM/3G (shown in Figure 6) and apply the same VAS. However, not all features of the VAS that are available

4 in the IMS will be available when the call is controlled in GSM/3G. For example, a feature such as call move, where the subscriber moves an ongoing call between their GSM phone and their SIP phone, requires the call to be anchored in IMS. This architecture also provides added value for operators in that it allows them the flexibility to determine the domain in which VAS should be invoked on a per-subscriber or per-call basis. Conclusions is the IMS standard that facilitates telephony, and it includes a defined set of basic services and supplementary services. Value-added services augment these basic and supplementary services, and must be clearly separated from the telephony when they are applied to. The interface needed between the VAS, and the IMS/ architecture needs to be well defined. 3GPP has specified, and continues to enhance, an extensive set of telephony services for the next-generation mobile, including advanced features such as VoLTE, voice-call continuity (VCC), session continuity and ICS. Specific functional entities in the IMS architecture are standardized and implemented in the Ericsson architecture. The separation of value-added services from is achieved through a services-specific northbound protocol exposure from. This approach has two advantages. First, functionality can be added to s extensive set of basic telephony and video services, combined with advanced services such as VCC. Second, service developers can concentrate on adding value to telephony rather than on controlling it. In addition to these benefits, using the Ericsson Composition Engine allows operators to provide VAS within the realms of and beyond. FIGURE 4 MS FIGURE 5 augmented by BCS A/Iu Usage of multiple terminals/multimode terminals Gm CS access + core IP carrier access I2/Mg CAMEL service integration with / Ma CAMEL service BCS Parlay X (SIP) CSCF Value added service Basic telephony including mobility, multi-terminal usage, address transfer, inter-terminal handover Legacy CAMEL, including subscriber data and backend system gsmssf service execution logic SIP adapter (SIP) Access Gm IMS core

5 Clearly separating value-added services FIGURE 6 Applying VAS for and legacy Enterprise logic T Relay BCS adapter Parlay X adapter (Parlay X) () MS DTAP CS access + core ISUP/BICC IMS core

6 Rogier Noldus joined Ericsson in 1996 and is an expert in architecture and protocols for multimedia. He has been involved in Intelligent Networks (IN) standardization and has driven the development of CAMEL within Ericsson. He made a switch to IMS and is now focuses on the integration of GSM and IMS s; covering Next generation IN, fixed-mobile convergence, media transmission, multi access, value-added services and next-generation core and access s. He holds a B.Sc. in electronics from the Institute of Technology in Utrecht in the Netherlands and an M.Sc. in telecommunications from the Witwatersrand University, in Johannesburg, South Africa. Anders Ryde is an expert in and service architecture at Business Unit Networks, Core and IMS in Sweden. He joined Ericsson in 1982 and has a background in and service architecture development for multimedia-enabled telecommunication, targeting both enterprise and residential users. He has been working on the evolution of IMS and IMS-based services for more than a decade, and is currently involved in the ongoing evolution of mobile telephony service and s to VoLTE. He holds an M.Sc. in electrical engineering from the Royal Institute of Technology (KTH) in Stockholm. Jonas Falkenå is an expert in IMS architecture and services for converged s at Business Unit Networks, Core and IMS at Ericsson in Sweden. He joined Ericsson in 1999 after studying computer engineering and business economics from KTH in Stockholm. He started out at wireline systems focusing on SIP and IMS solutions for the wireline market before working with IMS as a converged system. He has worked within several areas of IMS including integration and verification, system management, standardization, technical product management, and currently within portfolio management where he supports internal activities as well as technology lead responsibilities for key-customer solutions. Martien Huijsmans joined Ericsson in the Netherlands in He has an M.Sc. in mathematics from the University of Technology in Eindhoven, the Netherlands, and began his career by working with IN. Huijsmans was then involved in the development (on AXE-10) of the SCP, a service execution platform for IN applications. After this, he played a key role in the development of IN applications such as Freephone and Premium Rate, and the VPN enterprise application. He contributed to the first release of the Parlay gateway and Parlay gateway simulator. Huijsmans then spent several years in research projects, working on contextaware applications and mobility for business communication. Next he focused on the evolution of the existing VAS toward IMS, and VAS in the IMS service layer, particularly service composition and component-based and service-oriented architectures. In 2006, he was appointed an expert in service-layer solutions for application creation at Ericsson. He currently works with standardization for business communication in ETSI/ TISPAN, 3GPP and UCIF, in areas such as business trunking, hosted enterprise and visual communication. References 1. Noldus, Olsson, Mulligan, Ryde et al, IMS Application Developer s Handbook: Creating and Deploying Innovative IMS Applications, Elsevier, for Convergence, Ericsson white paper,

INTELLIGENT NETWORK SERVICES MIGRATION MORE VALUE FOR THE

INTELLIGENT NETWORK SERVICES MIGRATION MORE VALUE FOR THE INTELLIGENT NETWORK SERVICES MIGRATION MORE VALUE FOR THE Voice over LTE SUBSCRIBER TECHNOLOGY White Paper Mobile operators have invested a lot of time and money in Intelligent Network (IN) services for

More information

Developer's Handbook

Developer's Handbook IMS Application Developer's Handbook Creating and Deploying Innovative IMS Applications Rogier Noldus Ulf Olsson Catherine Mulligan loannis Fikouras Anders Ryde Mats Stifle AMSTERDAM BOSTON HEIDELBERG

More information

Multi-access for the IMS network

Multi-access for the IMS network Multi-access for the IMS network Rogier Noldus, Ralf Keller and Bo Åström IMS multi-access (IMA) gives non-ims-capable devices access to the IMS core network and services. It thus enables operators to

More information

Architectural Overview of IP Multimedia Subsystem -IMS

Architectural Overview of IP Multimedia Subsystem -IMS Architectural Overview of IP Multimedia Subsystem -IMS Presented by: Masood Khosroshahy June 2006 B E G I N N I N G 1 Project supervisor: Prof. Elie Najm Simplified view of the layered architecture in

More information

Advanced SIP Series: SIP and 3GPP

Advanced SIP Series: SIP and 3GPP Advanced SIP Series: SIP and 3GPP, Award Solutions, Inc Abstract The Session Initiation Protocol has been selected as the main signaling protocol of the Third Generation Partnership Projects IP Multimedia

More information

3GPP TR 23.810 V8.0.0 (2008-09)

3GPP TR 23.810 V8.0.0 (2008-09) TR 23.810 V8.0.0 (2008-09) Technical Report 3rd Generation Partnership Project; Technical Specification Group Services and System Aspects; Study on Architecture Impacts of Service Brokering (Release 8)

More information

II. Service deployment

II. Service deployment BULGARIAN ACADEMY OF SCIENCES CYBERNETICS AND INFORMATION TECHNOLOGIES Volume 9, No 3 Sofia 2009 Integration of Services Implemented on Different Service Platforms Evelina Pencheva, Ivaylo Atanasov Technical

More information

Fixed Mobile Convergence - A Pre-IMS Solution

Fixed Mobile Convergence - A Pre-IMS Solution Fixed Mobile Convergence Migration for Cable Operators Moving From Next Generation Network to IMS Environment The growing market demand for service convergence is the driving force behind the development

More information

Delivery of Voice and Text Messages over LTE

Delivery of Voice and Text Messages over LTE Delivery of Voice and Text Messages over LTE 1. The Market for Voice and SMS! 2. Third Party Voice over IP! 3. The IP Multimedia Subsystem! 4. Circuit Switched Fallback! 5. VoLGA LTE was designed as a

More information

Mobile Core Evolution to IMS

Mobile Core Evolution to IMS Mobile Core Evolution to Elena Romero, Sales Manager Ericsson AB 2005 1 Why? IP Multimedia Subsystem () is a standardised architecture (defined by 3GPP/3GPP2) for offering services on the packet domain.

More information

of the existing VoLTE roaming and interconnection architecture. This article compares existing circuit-switched models with the earlier

of the existing VoLTE roaming and interconnection architecture. This article compares existing circuit-switched models with the earlier VoLTE 3GPP Roaming Further Development of LTE/LTE-Advanced LTE Release 10/11 Standardization Trends VoLTE Roaming and ion Standard Technology In 3GPP Release 11, the VoLTE roaming and interconnection architecture

More information

IP Multimedia Subsystem (IMS) Service Architecture

IP Multimedia Subsystem (IMS) Service Architecture IP Multimedia Subsystem (IMS) Service Architecture Supports multiple applications by providing traditional telephony and non-telephony services Cost savings and revenue generating capabilities are driving

More information

End-2-End QoS Provisioning in UMTS networks

End-2-End QoS Provisioning in UMTS networks End-2-End QoS Provisioning in UMTS networks Haibo Wang Devendra Prasad October 28, 2004 Contents 1 QoS Support from end-to-end viewpoint 3 1.1 UMTS IP Multimedia Subsystem (IMS)................... 3 1.1.1

More information

Service Broker 1.0 Service Broker Operator Guide

Service Broker 1.0 Service Broker Operator Guide Service Broker 1.0 Service Broker Operator Guide Free Operator Guide The Moriana Group March 2010 Section B Thought Leadership White Papers Thought Leadership White Papers 2 Service Broker Operator Guide

More information

... Figure 2: Proposed Service Invocation Mechanism. AS Service invocation 2 SC invocation 2. Session/Call Control Function

... Figure 2: Proposed Service Invocation Mechanism. AS Service invocation 2 SC invocation 2. Session/Call Control Function Next Generation Network Service Architecture in the IP Multimedia Subsystem Anahita Gouya, Noël Crespi, Lina Oueslati, {anahita.gouya, noel.crespi, lina.oueslati}@int-evry.fr, Institut National des Télécommunications

More information

COPYRIGHTED MATERIAL. Contents. Foreword. Acknowledgments

COPYRIGHTED MATERIAL. Contents. Foreword. Acknowledgments Contents Foreword Preface Acknowledgments 1 Introduction 1 1.1 Motivation for Network Convergence 1 1.2 The Core Network 2 1.3 Legacy Service Requirements 4 1.4 New Service Requirements 5 1.5 Architectures

More information

SERVICE CONTINUITY. Ensuring voice service

SERVICE CONTINUITY. Ensuring voice service SERVICE CONTINUITY FOR TODAY S Voice over LTE SUBSCRIBERS Ensuring voice service with Single Radio Voice Call Continuity (SR-VCC) TECHNOLOGY White Paper Subscribers expectations for mobile data services

More information

IMS Architecture and Network Convergence

IMS Architecture and Network Convergence IMS Architecture and Network Convergence Larry O Pella Director, Fixed-Mobile Convergence Alcatel ATIS NGN-FocusGroup Viewpoint One picture is worth ten thousand words - Frederick Barnard 2 Framework for

More information

ETSI TS 182 023 V2.1.1 (2009-01) Technical Specification

ETSI TS 182 023 V2.1.1 (2009-01) Technical Specification TS 182 023 V2.1.1 (2009-01) Technical Specification Telecommunications and Internet converged Services and Protocols for Advanced Networking (TISPAN); Core and enterprise NGN interaction scenarios; Architecture

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

Juha Heinänen jh@tutpro.com

Juha Heinänen jh@tutpro.com From Voice over IP to Voice over Internet Juha Heinänen jh@tutpro.com From VoIP to VoINET VoIP replaced wires in PBX and PSTN backbones with IP preserves the traditional, centralized telephony service

More information

Implementing Conditional Conference Call Use Case over IMS and Non IMS Testbed an experimental results through comparison approach

Implementing Conditional Conference Call Use Case over IMS and Non IMS Testbed an experimental results through comparison approach Proceedings of the 6th WSEAS International Conference on Applications of Electrical Engineering, Istanbul, Turkey, May 27-29, 2007 109 Implementing Conditional Conference Call Use Case over IMS and Non

More information

A Proposed Model For QoS guarantee In IMSbased Video Conference services

A Proposed Model For QoS guarantee In IMSbased Video Conference services International Journal of Intelligent Information Technology Application, 2009, 2(5):243-249 A Proposed Model For QoS guarantee In IMSbased Video Conference services Maryam Kiani Department of Electrical

More information

Acme Packet Net-Net SIP Multimedia-Xpress

Acme Packet Net-Net SIP Multimedia-Xpress Acme Packet Net-Net SIP Overview Net-Net SIP (SMX) combines IP Multimedia Subsystem (IMS) session management with leading session border control (SBC) functions to reduce the complexity and cost of delivering

More information

Overview of GSMA VoLTE Profile. minimum required functions [3]. 2. Background

Overview of GSMA VoLTE Profile. minimum required functions [3]. 2. Background GSMA Overview of GSMA Profile It was agreed in the GSMA in February 2010 that voice services over LTE () shall use the platform standardized by the 3GPP with a view to maximizing international interoperability.

More information

Efficient evolution to all-ip

Efficient evolution to all-ip Press information June 2006 Efficient evolution to all-ip The competitive landscape for operators and service providers is constantly changing. New technologies and network capabilities enable new players

More information

PARAMETERS TO BE MONITORED IN THE PROCESS OF OPERATION WHEN IMPLEMENTING NGN TECHNICAL MEANS IN PUBLIC TELECOMMUNICATION NETWORKS

PARAMETERS TO BE MONITORED IN THE PROCESS OF OPERATION WHEN IMPLEMENTING NGN TECHNICAL MEANS IN PUBLIC TELECOMMUNICATION NETWORKS Draft Recommendation Q.3902 PARAMETERS TO BE MONITORED IN THE PROCESS OF OPERATION WHEN IMPLEMENTING NGN TECHNICAL MEANS IN PUBLIC TELECOMMUNICATION NETWORKS Summary This Recommendation describes the main

More information

Service Broker Function in IMS Architecture - Issues and Considerations

Service Broker Function in IMS Architecture - Issues and Considerations 12th WSE International Conference on COMPUTERS, Heraklion, Greece, July 23-25, 2008 Function in IMS Architecture - Issues and Considerations HUI-NA CHUA, CHOR-MIN TAN Malaysian Research Centre, British

More information

Voice Quality with VoLTE

Voice Quality with VoLTE Matthias Schulist Akos Kezdy Qualcomm Technologies, Inc. Voice Quality with VoLTE 20. ITG Tagung Mobilkommunikation 2015 Qualcomm Engineering Services Support of Network Operators Strong R&D Base End-to-end

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

Voice over IP over LTE (VoLTE) Impacts on LTE access. EFORT http://www.efort.com

Voice over IP over LTE (VoLTE) Impacts on LTE access. EFORT http://www.efort.com 1 Introduction Voice over IP over LTE (VoLTE) Impacts on LTE access EFORT http://www.efort.com IMS (IP Multimedia Subsystems) has been around for some time, and many infrastructure vendors have invested

More information

VoIP trends in Fixed Network Operators

VoIP trends in Fixed Network Operators VoIP trends in Fixed Network Operators Petros Sarantopoulos Carrier Networks Control SIEMENS GREECE Agenda Standardization MSFORUM / ETSI TISPAN Towards Class-5 VoIP Future trends ETSI NGN Overview Standardization

More information

IP Multimedia System: general aspects and migration perspectives

IP Multimedia System: general aspects and migration perspectives IMS TPC EPC IP Multimedia System: general aspects and migration perspectives Dr. Leo Lehmann Federal Office of Communication, Switzerland ITU Workshop on Developments regarding telecommunication network

More information

ETSI TS 123 517 V8.0.0 (2007-12) Technical Specification

ETSI TS 123 517 V8.0.0 (2007-12) Technical Specification TS 123 517 V8.0.0 (2007-12) Technical Specification Digital cellular telecommunications system (Phase 2+); Universal Mobile Telecommunications System (UMTS); Telecommunications and Internet converged Services

More information

An Open Source IMS Initiative for the Research Community

An Open Source IMS Initiative for the Research Community The Open Source IMS Core An Open Source IMS Initiative for the Research Community 1 Motivation for an Open Source IMS Core IMS is in trial phases with telco and cable operators worldwide R&D efforts for

More information

Conferencing Using the IP Multimedia (IM) Core Network (CN) Subsystem

Conferencing Using the IP Multimedia (IM) Core Network (CN) Subsystem GPP X.S00-0 Version.0 Version Date: May 00 Conferencing Using the IP Multimedia (IM) Core Network (CN) Subsystem Revision: 0 COPYRIGHT GPP and its Organizational Partners claim copyright in this document

More information

Overview of Network Architecture Alternatives for 3GPP2 Femto Cells Jen M. Chen, et al. QUALCOMM Incorporated

Overview of Network Architecture Alternatives for 3GPP2 Femto Cells Jen M. Chen, et al. QUALCOMM Incorporated 3GPP2 Workshop, Boston, MA Title: Source: Contact: Overview of Network Architecture Alternatives for 3GPP2 Femto Cells Jen M. Chen, et al. QUALCOMM Incorporated Jen M. Chen QUALCOMM Incorporated 858-658-2543

More information

Investigation of Interworked IMS Architecture In Terms Of Traffic Security

Investigation of Interworked IMS Architecture In Terms Of Traffic Security Master Thesis in Electrical Engineering Department Of Telecommunication Engineering Blekinge Institute of Technology Investigation of Interworked IMS Architecture In Terms Of Traffic Security By: Aftab

More information

VoLTE with SRVCC: White Paper October 2012

VoLTE with SRVCC: White Paper October 2012 VoLTE with SRVCC: White Paper October 2012 Qualcomm VoLTE with SRVCC: The second phase of voice evolution for mobile LTE devices LTE Growth The 3GPP Long Term Evolution (LTE) high-speed, highcapacity data

More information

Single Radio Voice Call Continuity (SRVCC) Testing Using Spirent CS8 Interactive Tester

Single Radio Voice Call Continuity (SRVCC) Testing Using Spirent CS8 Interactive Tester Application Note Single Radio Voice Call Continuity (SRVCC) Testing Using Spirent CS8 Interactive Tester September 2013 Rev. A 09/13 Single Radio Voice Call Continuity (SRVCC) Testing Using Spirent CS8

More information

IMS architecture overview

IMS architecture overview IMS architecture overview An overview of IMS architecture and related Accenture experiences. Università Federico II - Napoli, 27 aprile 2007 Accenture, its logo, and High Performance Delivered are trademarks

More information

Delivering Multimedia Communication Services with OCCAS and Radisys Media Resource Function (MRF) A Partner Brief

Delivering Multimedia Communication Services with OCCAS and Radisys Media Resource Function (MRF) A Partner Brief Delivering Multimedia Communication Services with OCCAS and Radisys Media Resource Function (MRF) A Partner Brief The explosive growth of IP-enabled mobile devices is offering exciting new opportunities

More information

Intelligent Networks. John Anderson. Principles and ApplicaHons. The Institution of Electrical Engineers

Intelligent Networks. John Anderson. Principles and ApplicaHons. The Institution of Electrical Engineers Intelligent Networks Principles and ApplicaHons John Anderson The Institution of Electrical Engineers Contents Preface Acknowledgments Introduction to intelligent networks. The basics of intelligent networks..

More information

Roaming in LTE and Voice Over LTE

Roaming in LTE and Voice Over LTE Roaming in LTE and Voice Over LTE Dan Warren, Director of Technology, GSMA How to make an ecosystem 840 Networks in 192 countries 5,800,000,000,000 call minutes annually Tomi Ahonen Consulting Economies

More information

ENABLING WIRELESS Infrastructure Solutions

ENABLING WIRELESS Infrastructure Solutions ENABLING WIRELESS Infrastructure Solutions Radisys Your Trusted Partner As the world s networks evolve from 3G to 4G LTE and beyond, the wireless industry is accelerating into a period of unprecedented

More information

Contents. Continuity of services and mobility

Contents. Continuity of services and mobility July 2013 Contents Summary... 3 Introduction... 3 1 Framework technologies: LTE/EPC and IMS... 4 1.1 LTE/EPC... 4 1.2 ANDSF - Access network discovery and selection function... 5 3.1.1 MME - Mobility Management

More information

3GPP TS 24.604 V8.2.0 (2008-12)

3GPP TS 24.604 V8.2.0 (2008-12) TS 24.604 V8.2.0 (2008-12) Technical Specification 3rd Generation Partnership Project; Technical Specification Group Core Network and Terminals; Communication Diversion (CDIV) using IP Multimedia (IM)

More information

NGN Functional Architecture for Resource Allocation and Admission Control

NGN Functional Architecture for Resource Allocation and Admission Control NGN Functional Architecture for Resource Allocation and Admission Control 1 Hassan Yeganeh, 2 Maryam Shakiba, and 3 Amir hassan Darvishan Iran Telecommunication Research Center 1 yeganeh@itrc.ac.ir, 2

More information

ALCATEL-LUCENT 7750 SERVICE ROUTER NEXT-GENERATION MOBILE GATEWAY FOR LTE/4G AND 2G/3G AND ANCHOR FOR CELLULAR-WI-FI CONVERGENCE

ALCATEL-LUCENT 7750 SERVICE ROUTER NEXT-GENERATION MOBILE GATEWAY FOR LTE/4G AND 2G/3G AND ANCHOR FOR CELLULAR-WI-FI CONVERGENCE ALCATEL-LUCENT 7750 SERVICE ROUTER NEXT-GENERATION MOBILE GATEWAY FOR LTE/4G AND 2G/3G AND ANCHOR FOR CELLULAR-WI-FI CONVERGENCE The is a next generation mobile packet core data plane platform that supports

More information

TECHNICAL REPORT End to End Network Architectures (E2NA); Location of Transcoders for voice and video communications

TECHNICAL REPORT End to End Network Architectures (E2NA); Location of Transcoders for voice and video communications TR 103 279 V1.1.1 (2014-08) TECHNICAL REPORT End to End Network Architectures (E2NA); Location of Transcoders for voice and video communications 2 TR 103 279 V1.1.1 (2014-08) Reference DTR/E2NA-00006-Loc-Transcoders

More information

Nokia Siemens Networks mobile softswitching Taking voice to the next level

Nokia Siemens Networks mobile softswitching Taking voice to the next level Nokia Siemens Networks mobile softswitching Taking voice to the next level Providing an answer for today and tomorrow Evolving technologies Nokia Siemens Networks provides a solid platform for the future

More information

Inter-Domain QoS Control Mechanism in IMS based Horizontal Converged Networks

Inter-Domain QoS Control Mechanism in IMS based Horizontal Converged Networks Inter-Domain QoS Control Mechanism in IMS based Horizontal Converged Networks Mehdi Mani Wireless Networks and Multimedia Service Department GET-INT Evry, France mehdi.mani@int-evry.fr Noel Crespi Wireless

More information

Service Delivery Platforms for Network Operators

Service Delivery Platforms for Network Operators Service Delivery Platforms for Network Operators 26 Service Delivery Platforms for Network Operators Kansuke Kuroyanagi Yuichi Mori OVERVIEW: SDPs deployed by mobile operators have been successfully growing

More information

Service Brokering: Opportunities and Challenges

Service Brokering: Opportunities and Challenges Introduction Service Brokering: Opportunities and Challenges Two developments offer new communications, information, and content delivery capabilities for responding to both business needs for increased

More information

WHAT S BEHIND YOUR SMARTPHONE ICONS? A brief tour of behind-the-scenes signaling for multimedia services

WHAT S BEHIND YOUR SMARTPHONE ICONS? A brief tour of behind-the-scenes signaling for multimedia services WHAT S BEHIND YOUR SMARTPHONE ICONS? A brief tour of behind-the-scenes signaling for multimedia services Harry G. Perros Computer Science Department NC State University, Raleigh 27695 USA Email: hp@ncsu.edu

More information

284 23 3001 Uen Rev A. October 2004 WHITE PAPER. IMS IP Multimedia Subsystem. The value of using the IMS architecture

284 23 3001 Uen Rev A. October 2004 WHITE PAPER. IMS IP Multimedia Subsystem. The value of using the IMS architecture 284 23 3001 Uen Rev A October 2004 WHITE PAPER IMS IP Multimedia Subsystem The value of using the IMS architecture E Preface IMS IP Multimedia Subsystem is an international, recognized standard; it specifies

More information

This specification this document to get an official version of this User Network Interface Specification

This specification this document to get an official version of this User Network Interface Specification This specification describes the situation of the Proximus network and services. It will be subject to modifications for corrections or when the network or the services will be modified. Please take into

More information

Internet Protocol (IP)/Intelligent Network (IN) Integration

Internet Protocol (IP)/Intelligent Network (IN) Integration Internet Protocol (IP)/Intelligent Network (IN) Integration Definition The convergence of the public switched telephone network (PSTN) and Internet protocol (IP) data networks promises exciting opportunities

More information

Session Border Controllers: Addressing Tomorrow s Requirements

Session Border Controllers: Addressing Tomorrow s Requirements White Paper Session Border Controllers: Addressing Tomorrow s Requirements Prepared by Jim Hodges Senior Analyst, Heavy Reading www.heavyreading.com on behalf of www.metaswitch.com September 2011 Introduction

More information

4G Americas Technical Report Analysis of Transitioning to NG9-1-1 from a Wireless Service Provider Perspective

4G Americas Technical Report Analysis of Transitioning to NG9-1-1 from a Wireless Service Provider Perspective Page 1 of 26 TABLE OF CONTENTS EXECUTIVE SUMMARY... 4 1. INTRODUCTION... 5 1.1. Scope... 5 2. FACTORS IMPACTING WIRELESS SERVICE PROVIDER TRANSITIONING TO NG9-1-1... 5 2.1. Wireless Service Provider and

More information

Co-existence of Wireless LAN and Cellular Henry Haverinen Senior Specialist Nokia Enterprise Solutions

Co-existence of Wireless LAN and Cellular Henry Haverinen Senior Specialist Nokia Enterprise Solutions Co-existence of Wireless LAN and Cellular Henry Haverinen Senior Specialist Nokia Enterprise Solutions 1 2005 Nokia city_wlan_2005_haverinen.ppt / 2005-08-19 / HH Outline Key use cases of integrating Wireless

More information

TÓPICOS AVANÇADOS EM REDES ADVANCED TOPICS IN NETWORKS

TÓPICOS AVANÇADOS EM REDES ADVANCED TOPICS IN NETWORKS Mestrado em Engenharia de Redes de Comunicações TÓPICOS AVANÇADOS EM REDES ADVANCED TOPICS IN NETWORKS 2009-2010 Arquitecturas Modelação e Abstracção - Architectures Modeling and Abstraction 1 Outline

More information

IMS & Triple Play Services Architecture

IMS & Triple Play Services Architecture IMS & Triple Play Services Architecture Brian Mahony, VP Marketing Guillaume Widmer, CTO Triple Play Symposium, September 2005 2005 Netcentrex S.A. All rights reserved. Netcentrex S.A. Proprietary Information.

More information

Technology Evolution Framework for 3GPP2 Networks

Technology Evolution Framework for 3GPP2 Networks SC.R00-0 v.0 Evolution of GPP Networks GPP SC.R00-0 v.0 Date: October 00 Technology Evolution Framework for GPP Networks A White Paper COPYRIGHT 00, GPP GPP and its Organizational Partners claim copyright

More information

SIP-based Mobility in a future NGN-based Core Network for TETRA-PMR-Systems

SIP-based Mobility in a future NGN-based Core Network for TETRA-PMR-Systems SIP-based Mobility in a future NGN-based Core Network for TETRA-PMR-Systems Selected results of an R&D project funded by the Federal Ministry of Economics and Technology (BMWi), Germany Rohde & Schwarz

More information

PSTN IXC PSTN LEC PSTN LEC STP STP. Class 4. Class 4 SCP SCP STP. Switch. Switch STP. Signaling Media. Class 5. Class 5. Switch.

PSTN IXC PSTN LEC PSTN LEC STP STP. Class 4. Class 4 SCP SCP STP. Switch. Switch STP. Signaling Media. Class 5. Class 5. Switch. As we enter the 21st century, we are experiencing a telecommunications revolution. From a technological perspective, the distinction between voice information and other kinds of data is blurring as circuit-switched

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

NFV & SDN World. Practical Approaches to NFV Orchestration Deployment. Terry McCabe CTO Mobile Business Unit

NFV & SDN World. Practical Approaches to NFV Orchestration Deployment. Terry McCabe CTO Mobile Business Unit NFV & SDN World Practical Approaches to NFV Orchestration Deployment Terry McCabe CTO Mobile Business Unit May 2015 Mitel 2 2015 Mitel. Proprietary and Confidential. Mavenir 4G Customer Launches Mavenir

More information

LTE CDMA Interworking

LTE CDMA Interworking LTE CDMA Interworking ehrpd - Use of a Common Core and a Stepping Stone to LTE Mike Dolan Consulting Member of Technical Staff Alcatel-Lucent Overview ehrpd (evolved High Rate Packet Data*) ehrpd involves

More information

Fixed Mobile Convergence (FMC): Understanding its Evolution, Advantages, and Challenges Role of Test, Monitoring, and Service Assurance

Fixed Mobile Convergence (FMC): Understanding its Evolution, Advantages, and Challenges Role of Test, Monitoring, and Service Assurance White Paper Fixed Mobile Convergence (FMC): Understanding its Evolution, Advantages, and Challenges Role of Test, Monitoring, and Assurance 1.0 Executive Summary At the core of understanding the promise

More information

Alcatel-Lucent 1300 Convergent Network Management Center OPEX REDUCTION THROUGH INTEGRATED NETWORK MANAGEMENT

Alcatel-Lucent 1300 Convergent Network Management Center OPEX REDUCTION THROUGH INTEGRATED NETWORK MANAGEMENT Alcatel-Lucent 1300 Convergent Network Management Center OPEX REDUCTION THROUGH INTEGRATED NETWORK MANAGEMENT The Alcatel-Lucent 1300 Convergent Network Management Center (CMC) provides cost-effective

More information

MPLS: Enabling Fixed-Mobile Convergence

MPLS: Enabling Fixed-Mobile Convergence MPLS: Enabling Fixed-Mobile Convergence Barry M. Tishgart Vice President, Managed Services 2006 11 10 SPRINT, the "Going Forward" logo, the NEXTEL name and logo and other trademarks are trademarks of Sprint

More information

A business view for NGN service usage

A business view for NGN service usage A business view for NGN service usage Emmanuel Bertin 1, Idir Fodil 1, Noel Crespi 2 1 France Telecom, R&D division 2 Institut National des Télécommunications (GET-INT) Abstract. Next Generation Networks

More information

Fixed versus Mobile Turning Convergence into Reality. Dieter Schuler, Wouter Franx Lucent Technologies

Fixed versus Mobile Turning Convergence into Reality. Dieter Schuler, Wouter Franx Lucent Technologies Fixed versus Mobile Turning Convergence into Reality Dieter Schuler, Wouter Franx Lucent Technologies Agenda Fixed Mobile Convergence Service Definition Operator Challenges IP Multimedia Subsystem the

More information

CS Fallback Function for Combined LTE and 3G Circuit Switched Services

CS Fallback Function for Combined LTE and 3G Circuit Switched Services EPC Voice over Circuit Switched Services Special Articles on SAE Standardization Technology CS Fallback Function for Combined and Circuit Switched Services The PP, an international standardization body

More information

A Scenario of Machine-to-Machine (M2M) Health Care Service

A Scenario of Machine-to-Machine (M2M) Health Care Service A Scenario of Machine-to-Machine (M2M) Health Care Service Jung-Ho Kim*, Ya-Ting Wei*, Jae-Oh Lee* * Dept. of Electrical, Electronics &, Korea University of Technology and Education, Korea {jungho32, weiyating,

More information

grow as a result of further service diversification.

grow as a result of further service diversification. All-IP Network Conversion of CS to IP-based Network Special Articles on All-IP Network Technology Evolution of Core Network IP-based FOMA Voice Network toward Enhanced Services and Improved Efficiencies

More information

Advanced SIP Series: SIP and 3GPP Operations

Advanced SIP Series: SIP and 3GPP Operations Advanced S Series: S and 3GPP Operations, Award Solutions, Inc Abstract The Session Initiation Protocol has been chosen by the 3GPP for establishing multimedia sessions in UMTS Release 5 (R5) networks.

More information

Research on Initial Filter Criteria of IP Multimedia Subsystem

Research on Initial Filter Criteria of IP Multimedia Subsystem Research on Initial Filter Criteria of IP Multimedia Subsystem Yafang WANG e-mail: wangyafang@hebust.edu.cn Xiaozhe ZHENG e-mail: zhengxiaozhe12@163.com Leilei KANG e-mail: lei-736@163.com Bingyang CHENG

More information

Evolution towards All-IP: the Service Layer

Evolution towards All-IP: the Service Layer 284 23-3015 Uen Rev A February 2005 Evolution towards All-IP: the Service Layer White Paper The evolution to an all-ip infrastructure will have impacts on the Service Layer. New network architectures,

More information

SIP Roaming Server Product Overview. Mobile Convergence Technology

SIP Roaming Server Product Overview. Mobile Convergence Technology SIP Roaming Server Product Overview Mobile Convergence Technology CONNECTING NETW ORKS Roam, Talk and Text (without a Mobile Network) By interworking with existing communications infrastructures, Session

More information

ETSI TS 182 012 V2.1.4 (2008-03) Technical Specification

ETSI TS 182 012 V2.1.4 (2008-03) Technical Specification TS 182 012 V2.1.4 (2008-03) Technical Specification Telecommunications and Internet converged Services and Protocols for Advanced Networking (TISPAN); IMS-based PSTN/ISDN Emulation Sub-system (PES); Functional

More information

Integrating Lawful Intercept into the Next Generation 4G LTE Network

Integrating Lawful Intercept into the Next Generation 4G LTE Network Integrating Lawful Intercept into the Next Generation 4G LTE Network All telecommunication providers that currently or plan to provide 4G LTE service to their customers must consider significant changes

More information

Chapter 17: M2M-Based Metropolitan Platform for IMS-Enabled Road Traffic Management in IoT

Chapter 17: M2M-Based Metropolitan Platform for IMS-Enabled Road Traffic Management in IoT Chapter 17: M2M-Based Metropolitan Platform for IMS-Enabled Road Traffic Management in IoT Chih-Yuan Lee Department of CSIE National Taipei University 1 Outline Abstract Introduction Background System

More information

IMS Services Introduction

IMS Services Introduction IMS Services Introduction www.huawei.com References 3GPP TS 23.002: Network architecture 3GPP TS 23.218: IP Multimedia (IM) session handling; IM call model 3GPP TS 23.228: IP Multimedia Subsystem (IMS);

More information

MODELING IMS SERVICES

MODELING IMS SERVICES Journal of Mobile Multimedia, Vol. 3, No.2 (2007) 150-167 Rinton Press MODELING IMS SERVICES EMMANUEL BERTIN IMEN BEN YAHIA France Telecom R&D Orange Labs, France {emmanuel.bertin, imen.benyahia}@orange-ftgroup.com

More information

Design Document. Offline Charging Server (Offline CS ) Version 1.0. - i -

Design Document. Offline Charging Server (Offline CS ) Version 1.0. - i - Design Document Offline Charging Server (Offline CS ) Version 1.0 - i - Document Scope Objective The information provided in this document specifies the design details of Operations of Offline Charging

More information

Voice over IP in the context of 3G mobile communications

Voice over IP in the context of 3G mobile communications Voice over IP in the context of 3G mobile communications INGE GRØNBÆK Inge Grønbæk is Senior Adviser at Telenor R&D The 3GPP architecture required for a global Voice over IP (VoIP) service is described.

More information

Convergent data center for future network

Convergent data center for future network Convergent data center for future network Xia zhen hua (Lawrence Hsia) Huawei Technologies xiazhenhua@huawei.com Abstract In this article, we will analyze current issues and new challenges on user profile,

More information

Analysis of Enterprise VoIP Traffic from a Wire line IMS System. Yu Bai Master Thesis Supervisor: Tord Westholm, EAB Supervisor: Dougherty Mark, DU

Analysis of Enterprise VoIP Traffic from a Wire line IMS System. Yu Bai Master Thesis Supervisor: Tord Westholm, EAB Supervisor: Dougherty Mark, DU Analysis of Enterprise VoIP Traffic from a Wire line IMS System Yu Bai Master Thesis Supervisor: Tord Westholm, EAB Supervisor: Dougherty Mark, DU DEGREE PROJECT Computer Engineering Program Master of

More information

LTE network in a box. Nokia Networks

LTE network in a box. Nokia Networks Nokia Networks LTE network in a box Public safety networks will gradually evolve to LTE-based technology in the coming years. Such networks must offer much higher resilience and service availability than

More information

Alcatel-Lucent Ultimate Wireless Broadband Solution. Re-define the wireless experience with the industry s most comprehensive end-to-end LTE solution

Alcatel-Lucent Ultimate Wireless Broadband Solution. Re-define the wireless experience with the industry s most comprehensive end-to-end LTE solution Alcatel-Lucent Ultimate Wireless Broadband Solution Re-define the wireless experience with the industry s most comprehensive end-to-end LTE solution The Ultimate Wireless Broadband End-to-End LTE solution

More information

IMS/SIP Video Service in HD world. RADVISION TBU Interactive Video IMS BEEHD

IMS/SIP Video Service in HD world. RADVISION TBU Interactive Video IMS BEEHD IMS/SIP Video Service in HD world Welcome to RADVISION THE INDUSTRY S EXPERT IN VISUAL COMMUNICATIONS RADVISION is the leading provider of core technologies, products and solutions that enable unified

More information

Open IMS Core with VoIP Quality Adaptation

Open IMS Core with VoIP Quality Adaptation Open IMS Core with VoIP Quality Adaptation Is-Haka Mkwawa, Emmanuel Jammeh, Lingfen Sun, Asiya Khan and Emmanuel Ifeachor Centre for Signal Processing and Multimedia Communication School of Computing,Communication

More information

Technology White Paper

Technology White Paper Technology White Paper Evolution of Media Servers for IMS/NGN Services Media Servers (MS) will play a key role in future IMS/NGN networks. More advanced services require more and more complete interaction

More information

Diameter in the Evolved Packet Core

Diameter in the Evolved Packet Core Diameter in the Evolved Packet Core A Whitepaper November 2009 Page 2 DIAMETER in the Evolved Packet Core Mobile broadband is becoming a reality, as the Internet generation grows accustomed to having broadband

More information

MNS Viewpoint: LTE EVOLUTION IN AFRICA 1. Introduction

MNS Viewpoint: LTE EVOLUTION IN AFRICA 1. Introduction MNS Viewpoint: LTE EVOLUTION IN AFRICA 1. Introduction Wireless communications have evolved rapidly since the emergence of 2G networks. 4G technology (also called LTE), enables to answer the new data market

More information

MED: Voice over IP systems

MED: Voice over IP systems www.ptt.co.uk Online course specification MED: Voice over IP systems Target audience: This online course is designed for those who will be responsible for the design or maintenance of Voice over IP (VoIP)

More information

Performance Estimation of a SIP based Push-to-Talk Service for 3G Networks

Performance Estimation of a SIP based Push-to-Talk Service for 3G Networks Performance Estimation of a SIP based Push-to-Talk Service for 3G Networks Eoin O Regan and Dirk Pesch Adaptive Wireless Systems Group Cork Institute of Technology Ireland Abstract Push-To-Talk (PTT) is

More information

CS Project 09 IMS Video Mail Service (ViMS) September 2009

CS Project 09 IMS Video Mail Service (ViMS) September 2009 CS Project 09 IMS Video Mail Service (ViMS) September 2009 Content Mobile Arts company presentation Telecom key characteristics IMS Video Service basics IMS Video Mail Service network context IMS Video

More information