1 Internet, Part 2 1) Session Initiating Protocol (SIP) 2) Quality of Service (QoS) support 3) Mobility aspects (terminal vs. personal mobility) 4) Mobile IP
2 Session Initiation Protocol (SIP) SIP is a protocol for handling multiparty multimedia calls (sessions). The IP routes of the control plane (SIP signalling) and user plane (multimedia data) are separate. SIP signalling User B User A Multimedia data User C
3 SIP vs. H.323 H.323 is a suite of protocols for managing multiparty multimedia calls in the PSTN (in other words using circuit switched technology). Contrary to SIP, H.323 is used today (among others it forms the basis for Microsoft s NetMeeting application). H.323 is more complex than SIP (this is the reason we will not go into more detail in this course). SIP has been chosen for handling call control in the IMS (IP Multimedia Subsystem) specified in 3GPP Release 5. H.323 standards (ITU-T) vs. RFC 3261 (good tutorial)
4 SIP offers the following features Signalling for handling of multiparty calls Call forking (several users are alerted at the same time) Capability of multimedia calls (voice,video, etc. at the same time) can be negotiated using Session Description Protocol (SDP) messages carried over SIP User-friendly addressing Personal mobility (but not terminal mobility) Good flexibility, scalability, extensibility Interworking between SIP telephony and PSTN telephony (as well as between SIP addressing and E.164 addressing).
5 Basic (two-party) SIP call (1) SIP proxy of user A Request Response Invite... net1.com User A SIP address of Alice: User B Invite message (corresponding to IAM message in ISUP) is sent to SIP proxy of user A. The message includes SIP address of user B.
6 Basic (two-party) SIP call (2) SIP proxy of user A net1.com Invite... SIP proxy of user B net2.com User A User B Invite message is routed to SIP proxy of user B (Bob). How does SIP proxy of Bob know where Bob is at this moment? (At home, at work, at computer Z,...?)
7 SIP registration User A SIP proxy of user A net1.com SIP proxy of user B net2.com route Invite message to: 2 1 Register... User B The answer is: the terminal of Bob has performed SIP registration. Register messages including the URL of Bob s current terminal are sent initially (and at regular intervals) to the SIP proxy.
8 Basic (two-party) SIP call (3) SIP proxy of user A SIP proxy of user B net1.com net2.com Invite... User A User B Invite message is routed to Bob s terminal using Bob s URL provided via SIP registration. Alice s URL is included in the message.
9 Basic (two-party) SIP call (4) SIP proxy of user A net1.com 180 Ringing SIP proxy of user B net2.com User A User B Bob s terminal is ringing. An (optional) 180 Ringing message is routed back to user A (Alice) and an audio ringing tone is generated in Alice s terminal.
10 Basic (two-party) SIP call (5) SIP proxy of user A net1.com 200 OK Ack SIP proxy of user B net2.com User A User B Bob answers the call. A 200 OK message is routed back to Alice. Alice sends an Ack message to Bob.
11 Basic (two-party) SIP call (6) SIP proxy of user A SIP proxy of user B User A User B After successful session establishment, the user plane data (e.g. coded speech carried on top of RTP) is carried between the terminals directly through the Internet without involving SIP proxies.
12 SIP forking example Invite... User A SIP proxy of user A SIP proxy of user B Terminals of user B that have performed SIP registration Terminal 1 Terminal 2 Terminal 3 Forking: Different terminals of user B are alerted at the same time. The one that answers first returns the 200 OK message...
13 Three types of addresses E.164 address Address points directly to called user in the PSTN MSISDN Address points to HLR in GSM home network of called user HLR knows where to route call SIP address Address points to SIP proxy of called user SIP proxy knows where to route Invite SIP message
14 What can SIP do? The most important task of SIP is to find out URLs of terminals to be included in the multimedia session (see previous example). For negotiation of multimedia capabilities, SIP can carry SDP messages between end users (in Invite and 200 OK SIP messages). Unfortunately, SIP cannot influence the transport in the user plane (support of QoS and security features, inclusion of PCM/EFR transcoding equipment, etc.).
15 IP Multimedia Subsystem (IMS) AS AS (Application (Application Server) Server) AS AS AS AS IMS (IP Multimedia Subsystem) CSCF CSCF (Call (Call Session Session Control Control Function) Function) CSCF CSCF SIP SIP Location Location Database Database (usually (usually combined combined with with HLR) HLR) SGSN SGSN GGSN GGSN GGSN GGSN SGSN SGSN User A User B
16 Why IMS? In a conventional GPRS-based IP network, only Client-Server types of applications are possible. Client-Client (or peer-to-peer) types of applications are not possible since the dynamic IP address of the user B terminal is not known in the network. Possible Server Server Not possible SGSN SGSN GGSN GGSN GGSN GGSN SGSN SGSN User A User B
17 IMS operation (1) User B can be reached only after registering in the IMS, which means binding her/his SIP address with the dynamic IP address that was allocated when the PDP context of the GPRS session was established. IMS (IP Multimedia Subsystem) SIP SIP Location Location Database Database Register! SGSN SGSN GGSN GGSN GGSN GGSN SGSN SGSN User A User B
18 IMS operation (2) Session (or call) control involves SIP signalling as well as network functions provided by the IMS (for instance, CSCF offers SIP proxy functionality). IMS (IP Multimedia Subsystem) CSCF CSCF CSCF CSCF SIP SIP Location Location Database Database Invite 200 OK SGSN SGSN GGSN GGSN GGSN GGSN SGSN SGSN User A User B
19 IMS operation (3) Also, external application servers (e.g. presence server) can be employed during session control. AS AS IMS (IP Multimedia Subsystem) CSCF CSCF CSCF CSCF SIP SIP Location Location Database Database SGSN SGSN GGSN GGSN GGSN GGSN SGSN SGSN User A User B
20 IMS operation (4) After successful session establishment, the IMS is not involved in the transfer of user data (e.g., encoded speech) between the user A and B terminals. IMS (IP Multimedia Subsystem) CSCF CSCF CSCF CSCF SIP SIP Location Location Database Database User data over RTP SGSN SGSN GGSN GGSN GGSN GGSN SGSN SGSN User A User B
21 QoS support in IP networks Best effort service <=> no Quality of Service support Some alternatives for introducing QoS in IP backbone applications (situation year 2004): Alternative 1: RSVP (Resource ReSerVation Protocol) Alternative 2: DiffServ (Differentiated Services) Alternative 3: MPLS (MultiProtocol Label Switching) Alternative 4: IP tunneling over ATM IETF terminology: Traffic engineering
22 Problems with Best effort IP transport "Best effort" service is sufficient for traditional Internet applications like web browsing, , and file transfer. "Best effort" is not sufficient for real-time applications: Speech (voice) Low delay High throughput Video / audio streaming Multimedia applications Low delay variation Consistent throughput Low round-trip delay
23 QoS support mechanisms (1) RSVP (Resource ReSerVation Protocol) IETF RFC 2205 Resources are reserved beforehand (or at certain intervals) Host Host Ingress point IP Backbone Egress point Host Host RSVP can be considered an example of the integrated services concept (compare with differentiated services). RSVP is typically used together with other mechanism(s).
24 QoS support mechanisms (2) DiffServ (Differentiated Services) IETF RFC 2475 Service tagging in ToS byte at ingress point Host Host IPv4 Header Version Version Ingress point Time-to-live Time-to-live IP Backbone IHL IHL Type Type of of Service Service Identification Identification Protocol Protocol Egress point Host Host Traffic control based on ToS byte Total Total length length Flags ToS byte = 8 bits Flags (2 8 = 256 priority Header Header levels could be used)
25 QoS support mechanisms (3) MPLS (Multi-Protocol Label Switching) IETF RFC 2702 Label switching in all routers along the path Host Host Ingress point IP Backbone Egress point Host Host LSR = Label Switch Router (router with MPLS functionality) Virtual connection must be established first (using e.g. RSVP). IP datagrams are encapsulated in MPLS frames and relayed through label switch routers (only label is used for routing).
26 QoS support mechanisms (3 cont.) MPLS label structure: IP datagram L2 L2 payload Header of layer 2 protocol data unit L2 L2 H routing without MPLS L2 L2 payload Label L2 L2 H in case of MPLS Label length = 32 bits TTL TTL (8 (8 bits) S Exp Exp Stacking: L2 L2 Payload Label Label Label value (20 (20 bits) Stack bit identifies bottom-of-stack label Label L2 L2 H Label at top of stack is always in use first
27 QoS support mechanisms (3 cont.) Routing without MPLS: destination IP address in IP header is used for routing. L2 L2 payload DA L2 L2 H In case of MPLS: destination IP address is not used for routing along the virtual path between ingress and egress point. Routing is based on MPLS label instead. L2 L2 payload DA Label L2 L2 H
28 QoS support mechanisms (4) IP tunneling over ATM IP packets are directed to the ingress point IP traffic is carried over ATM virtual connection Host Host Ingress point ATM Backbone Egress point Host Host See lecture slides on ATM for protocol stacks involved
29 Problem with end-to-end QoS support There are millions of Internet routers worldwide based on IPv4 and without any QoS support. Efficient QoS support worldwide means that a large part of these routers must be updated. Terminal Conventional routers Terminal Edge router Routers offering QoS support Edge router
30 Situation is easier in this case Traditional circuit switched network: Terminal Switch Switch Switch Switch Switch Switch Terminal No store-and-forward nodes in network => predictable delay Circuit switched network including IP bearer section: Terminal Switch Switch Switch Switch Terminal Edge router IP backbone Edge router QoS support: Small/predictable delay between edge routers
31 Mobility in IP networks One can very generally define two types of mobility: Personal mobility (e.g. offered by SIP) Terminal mobility (e.g. offered by GPRS) The concept Mobile IP tries to combine both, when implemented together with wireless LAN technology (see last slides of this lecture). The IMS (IP Multimedia Subsystem) concept in 3GPP Release 5 also tries to combine both (using SIP and GPRS technology).
32 User mobility vs. terminal mobility Personal mobility (e.g. offered by SIP): User can move around in the network and use a new terminal after registration via the new terminal. The new terminal has the same address for incoming calls as the old terminal. However, terminal mobility is not supported. Terminal mobility (e.g. offered by GPRS): User can move around in the network and use the terminal at different locations => location updating. However, using different terminals means different addresses as far as incoming calls are concerned.
33 Mobile IP concept - IETF solution for (e.g.) Wireless LAN type applications - Wide-scale deployment together with IPv6? Basic architecture: Mobile Node Care-of address IP address 3 Foreign Agent Correspondent Node IP address 1 Home Agent Home address IP address 2
34 Mobile IP (cont.) Mobile node -terminated IP transport: Mobile Node Foreign Agent 2 Home Agent Care-of address (IP address 3) Correspondent Node 1 Home address (IP address 2) (IP address 1) 1. Correspondent node sends IP packet to permanent home address (corresponding URL is known). 2. Home agent tunnels IP datagram to care-of address.
35 Mobile IP (cont.) Tunneling in Mobile IP means encapsulation: Mobile Node Care-of address (IP address 3) Foreign Agent Home Agent Home address (IP address 2) IP IP header Original IP datagram IP IP payload IP IP header IP IP payload IP datagram sent to mobile node
36 Mobile IP (cont.) Mobile node -originated IP transport: Mobile Node Foreign Agent Home Agent Care-of address (IP address 3) Note: source address in IP datagram is home address (IP address 2), not care-of address (IP address 3) Correspondent Node Home address (IP address 2) (IP address 1) Mobile node sends IP packets directly to correspondent node (no tunneling required).
37 Mobile IP (cont.) Mobility requires: (1) agent advertisements Mobile Node Care-of address (IP address 3) Foreign Agent Home Agent Home address (IP address 2) New New mobile node node has has no no valid valid care-of address Foreign agents continuously broadcast (at (at 1 s intervals) lists lists of of free free care-of addresses within within their their area. area Mobile Mobile node node selects a care-of address and and informs the the foreign agent. agent.
38 Mobile IP (cont.) Mobility requires: (2) registration Mobile Node Care-of address (IP address 3) Foreign Agent Home Agent Home address (IP address 2) Mobile Mobile node node informs home home agent agent about about new new care-of address Home Home agent agent replies replies with with OK -message (or (or resolves the the problem if if situation is is not not OK). OK) From From now now on on home home agent agent can can tunnel tunnel IP IP packets to to mobile node node (using (using care-of address).
Internet Routing and MPLS N. C. State University CSC557 Multimedia Computing and Networking Fall 2001 Lecture # 27 Roadmap for Multimedia Networking 2 1. Introduction why QoS? what are the problems? 2.
Module 1-1 Introducing Basic MPLS Concepts 2004 Cisco Systems, Inc. All rights reserved. 1-1 Drawbacks of Traditional IP Routing Routing protocols are used to distribute Layer 3 routing information. Forwarding
Multimedia Communications Voice over IP Anandi Giridharan Electrical Communication Engineering, Indian Institute of Science, Bangalore 560012, India Voice over IP (Real time protocols) Internet Telephony
Course Description The next generation of telecommunications networks will deliver broadband data and multimedia services to users. The Ethernet interface is becoming the interface of preference for user
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.
TECHNICAL CHALLENGES OF VoIP BYPASS Presented by Monica Cultrera VP Software Development Bitek International Inc 23 rd TELELCOMMUNICATION CONFERENCE Agenda 1. Defining VoIP What is VoIP? How to establish
Chapter 10 Session Initiation Protocol Prof. Yuh-Shyan Chen Department of Computer Science and Information Engineering National Taipei University Outline 12.1 An Overview of SIP 12.2 SIP-based GPRS Push
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.
S-72.333 Postgraduate Course in Radio Communications. Interoperability between 3G and using IMS Antti Keurulainen, 25.5.2004 email@example.com Presentation outline Introduction to IMS Benefits
What is Mobility? Spectrum of mobility, from the perspective: no mobility high mobility mobile wireless user, using same AP mobile user, (dis) connecting from using DHCP mobile user, passing through multiple
: Session Initiation Protocol EFORT http://www.efort.com (Session Initiation Protocol) as defined in IETF RFC 3261 is a multimedia signaling protocol used for multimedia session establishment, modification
CE443 Computer Networks Virtual Private Network VPN, VRF, and MPLS Behnam Momeni Computer Engineering Department Sharif University of Technology Acknowledgments: Lecture slides are from Computer networks
MPLS Environment Introduction to MPLS Multi-Protocol Label Switching (MPLS) is a highly efficient and flexible routing approach for forwarding packets over packet-switched networks, irrespective of the
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
CDMA Systems Evolution to VoIP - Network Migration - Vocoder Technologies - Standards Support Gino Scribano, Distinguished Member of Technical Staff CDG VoIP Summit Feb 8 th, 2005 product or service names
5.0 Network Architecture 5.1 Internet vs. Intranet 5.2 NAT 5.3 Mobile Network 1 5.1The Internet Worldwide connectivity ISPs connect private and business users Private: mostly dial-up connections Business:
Degrees of Mobility Computer Networks Spectrum of mobility, from the perspective: stationary nomadic mobile Lecture 0: Mobility wireless user, accessing AP mobile user, connecting/ disconnecting from at
UMTS/GPRS system overview from an IP addressing perspective David Kessens Jonne Soininen Introduction 1) Introduction to 3GPP networks (GPRS, UMTS) Technical overview and concepts for 3GPP networks Mobility
EE4607 Session Initiation Protocol Michael Barry firstname.lastname@example.org email@example.com Outline of Lecture IP Telephony the need for SIP Session Initiation Protocol Addressing SIP Methods/Responses Functional
From the MPLS Forum Multi-Protocol Switching (MPLS) An Overview Mario BALI Turin Polytechnic Mario.Baldi@polito.it www.polito.it/~baldi MPLS is the enabling technology for the New Broadband (IP) Public
Developing Mobile Applications 3G and IMS 1 3G two things The most important aspect of 3g is the new frequency space. up to 155MHz of new bandwidth one carrier is 5MHz wide A general purpose network infrastructure
QoS in IMS, the emerging all IP cellular network September 2005 Ofer Weintraub Standard Insider Ltd. 2 The challenge 3 Comcast Triple Play Phase 1- Service Convergence Motivation More motivation Nextel
Mixer/Translator VOIP/SIP RTP Mixer, translator A mixer combines several media stream into a one new stream (with possible new encoding) reduced bandwidth networks (video or telephone conference) appears
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
15th lecture (last but one) Chair of Communication Systems Department of Applied Sciences University of Freiburg 2005 1 43 administrational stuff Next Thursday preliminary discussion of network seminars
Outline (Preliminary) 1. Introduction and Motivation 2. Digital Rights Management 3. Cryptographic Techniques 4. Electronic Payment Systems 5. Multimedia Content Description Part I: Content-Oriented Base
MPLS WAN Topologies 1 Multiprotocol Label Switching (MPLS) IETF standard, RFC3031 Basic idea was to combine IP routing protocols with a forwarding algoritm based on a header with fixed length label instead
Hands-On TCP-IP / IPv6 / VoIP Course Description In this Hands-On 3-day course, gives a deeper understanding of internetworking and routed network protocols. The focus of the course is the design, operation,
Information and Communication Networks Multimedia & Protocols in the Internet - Introduction to Siemens AG 2004 Bernard Hammer Siemens AG, München Presentation Outline Basics architecture Syntax Call flows
Best Practices for Video Transit on an MPLS Backbone Debbie Montano firstname.lastname@example.org Oct 7, 2009 1 Debbie Montano Joined Juniper - supporting R&E Community Debbie Montano Chief Architect Government,
ITU-D Workshop on NGN and Regulation for the Philippines NGN Architecture and main Elements Manila, (Philippines), June 2010 Oscar González Soto ITU Consultant Expert Spain email@example.com
Converged Networks Networks From Telecom to Datacom, Asynchronous Transfer Mode () From Datacom to Telecom, Multiprotocol Label Switching (MPLS) Further Convergence Evolving Networks OPTI 500, Spring 2011,
Special Module on Media Processing and Communication Multimedia Communication Fundamentals Dayalbagh Educational Institute (DEI) Dayalbagh Agra PHM 961 Indian Institute of Technology Delhi (IITD) New Delhi
IP Telephony and Network Convergence Raimo.Kantola@hut.fi Rkantola/28.11.00/s38.118 1 Today corporations have separate data and voice networks Internet Corporate Network PSTN, ISDN Rkantola/28.11.00/s38.118
VIDEOCONFERENCING Video class Introduction What is videoconferencing? Real time voice and video communications among multiple participants The past Channelized, Expensive H.320 suite and earlier schemes
MikroTik RouterOS Introduction to MPLS Prague MUM Czech Republic 2009 Q : W h y h a v e n 't y o u h e a r d a b o u t M P LS b e fo re? A: Probably because of the availability and/or price range Q : W
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: firstname.lastname@example.org
Communication Systems SIP Computer Science Organization I. Data and voice communication in IP networks II. Security issues in networking III. Digital telephony networks and voice over IP 2 Part 3 Digital,
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
Motivation for Mobile IP Motivation transfer Encapsulation Security Mobile IP and DHCP Problems DHCP Dr. Ka-Cheong Leung CSIS 7304 The Wireless and Mobile Computing 1 Routing based on IP destination address,
Session Initiation Protocol (SIP) The Emerging System in IP Telephony Introduction Session Initiation Protocol (SIP) is an application layer control protocol that can establish, modify and terminate multimedia
How will the Migration from IPv4 to IPv6 Impact Voice and Visual Communication? Nick Hawkins Director, Technology Consulting Polycom, Inc. All rights reserved. Agenda Introduction & standards Requirements
Quality of Service in the Internet Problem today: IP is packet switched, therefore no guarantees on a transmission is given (throughput, transmission delay, ): the Internet transmits data Best Effort But:
Susana R. de Novoa Several market forces accelerated IPv4 address exhaustion: Rapidly growing number of Internet users Always-on devices ADSL modems, cable modems Mobile devices laptop computers, PDAs,
Migrating to MPLS Technology and Applications Serge-Paul Carrasco June 2003 asiliconvalleyinsider.com Table Of Content Why to migrate to MPLS? Congestion on the Internet Traffic Engineering MPLS Fundamentals
Technical Report, IDE1008, February 2010 Multi-Protocol Label Switching To Support Quality of Service Needs Master s Thesis in Computer Network Engineering - 15hp AMJAD IFTIKHAR AOON MUHAMMAD SHAH & FOWAD
Voice over IP Andreas Mettis University of Cyprus November 23, 2004 Overview What is VoIP and how it works. Reduction of voice quality. Quality of Service for VoIP 1 VoIP VoIP (voice over IP - that is,
Quality of Service in the Internet Problem today: IP is packet switched, therefore no guarantees on a transmission is given (throughput, transmission delay, ): the Internet transmits data Best Effort But:
Multiprotocol Label Switching (), originating in IPv4, was initially proposed to improve forwarding speed. Its core technology can be extended to multiple network protocols, such as IPv6, Internet Packet
Technology White Paper IMS: Internet Age Telephony Telephony has made much progress to offer mobile and some simple multimedia services, but the basic principle remains the same: setting up a circuit between
MPLS Concepts Overview This module explains the features of Multi-protocol Label Switching (MPLS) compared to traditional ATM and hop-by-hop IP routing. MPLS concepts and terminology as well as MPLS label
Overview of Voice Over Internet Protocol Purva R. Rajkotia, Samsung Electronics November 4,2004 Overview of Voice Over Internet Protocol Presentation Outline History of VoIP What is VoIP? Components of
Quality of Service (QoS) An Alcatel Executive Briefing February, 2002 www.alcatel.com/enterprise Table of contents 1. Introduction...3 2. What is QoS?...3 2.1 Class of Service (CoS)...4 2.2 Soft QoS...4
Inter-Domain QoS Control Mechanism in IMS based Horizontal Converged Networks Mehdi Mani Wireless Networks and Multimedia Service Department GET-INT Evry, France email@example.com Noel Crespi Wireless
Slide supporting material Lesson 13: MPLS Networks Giovanni Giambene Queuing Theor and Telecommunications: Networks and Applications 2nd edition, Springer All rights reserved IP Over ATM Once defined IP
IP v 1-3: defined and replaced Introduction to IP v6 IP v4 - current version; 20 years old IP v5 - streams protocol IP v6 - replacement for IP v4 During developments it was called IPng - Next Generation
ARCHITECTURES TO SUPPORT PSTN SIP VOIP INTERCONNECTION 10 April 2009 Gömbös Attila, Horváth Géza About SIP-to-PSTN connectivity 2 Providing a voice over IP solution that will scale to PSTN call volumes,
A Silicon Valley Insider MPLS VPN Services PW, VPLS and BGP MPLS/IP VPNs Technology White Paper Serge-Paul Carrasco Abstract Organizations have been demanding virtual private networks (VPNs) instead of
Asynchrous Transfer Mode: architecture 1980s/1990 s standard for high-speed (155Mbps to 622 Mbps and higher) Broadband Integrated Service Digital Network architecture Goal: integrated, end-end transport
The feature allows embedded messages of the Session Initiation Protocol (SIP) passing through a device that is configured with Network Address Translation (NAT) to be translated and encoded back to the
1 Antti Vainio T-110.498-CN_Lecture2.PPT / 18-02-2003 Contents Flashback from the previous lectures UMTS Core Network II Communication Management Connection Management Session Management T-110.498 Special
World of Computer Science and Information Technology Journal (WCSIT) ISSN: 2221-0741 Vol. 2, No. 3, 110-114, 2012 Performance Evaluation for VOIP over IP and MPLS Dr. Reyadh Shaker Naoum Computer Information
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
Understanding Voice over IP Protocols Cisco Systems Service Provider Solutions Engineering February, 2002 1 Topics to Discuss History of VoIP VoIP Early Adopters VoIP Standards and Standards Bodies VoIP
Internetworking II: VPNs, MPLS, and Traffic Engineering 3035/GZ01 Networked Systems Kyle Jamieson Lecture 10 Department of Computer Science University College London Taxonomy of communica@on networks Virtual
CHAPTER 10 Mobile IP Adrian Farrel Today s computers are smaller and more mobile than they once were. Processing power that used to take up a whole air-conditioned room can now be easily carried around
King Fahd University of Petroleum & Minerals Computer Engineering g Dept COE 543 Mobile and Wireless Networks Term 111 Dr. Ashraf S. Hasan Mahmoud Rm 22-148-3 Ext. 1724 Email: firstname.lastname@example.org 12/24/2011
Voice over IP Professor Richard Harris Presentation Outline Brief overview of VoIP and applications Challenges of VoIP IP Support for Voice Protocols used for VoIP (current views) RTP RTCP RSVP H.323 Semester
IPv6, Mobile IP & Mobile IPv6 Tolga Numanoglu Outline IPv6 Background Features Details Mobile IP Mobile Node, Home Agent, Foreign Agent Mobile IPv6 What s different? IPv6 Background IP has been patched
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
BCS THE CHARTERED INSTITUTE FOR IT BCS HIGHER EDUCATION QUALIFICATIONS BCS Level 5 Diploma in IT COMPUTER NETWORKS Friday 2 nd October 2015 Morning Answer any FOUR questions out of SIX. All questions carry
Introduction This 4-day course offers a practical introduction to 'hands on' VoIP engineering. Voice over IP promises to reduce your telephony costs and provides unique opportunities for integrating voice
CHAPTER 2 Sections in this chapter address the following topics: Single Site, page 2-1 Multisite Implementation with Distributed Call Processing, page 2-3 Design Considerations for Section 508 Conformance,
Overlay Networks This lecture contains slides created by Ion Stoica (UC Berkeley). Slides used with permission from author. All rights remain with author. Definition Network defines addressing, routing,
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
Multicasting with Mobile IP & The Session Initiation Protocol Hamad el Allali and Cristian Hesselman Abstract This report discusses how Mobile IP deals with multicast communications and describes a possible
IP-based Mobility Management for a Distributed Radio Access Network Architecture email@example.com Outline - Definition IP-based Mobility Management for a Distributed RAN Architecture Page 2 Siemens
Mobile IP Intoduciton Mobile IP is an Internet standards track protocol that enhances the existing IP to accommodate mobility. Mobile IP in wireless networks is intended to be a direct extension of the
Institute of Telecommunications Warsaw University of Technology 2015 internet technologies and standards Piotr Gajowniczek Andrzej Bąk Michał Jarociński multimedia in the Internet Voice-over-IP multimedia
How Networks Differ Differences that can occur at network layer, which makes internetworking difficult: It is impossible to resolve all differences, and the solution is to take a simple approach (as in
Announcements I. Final Exam study guide online RTP / RTCP Internet Protocols CSC / ECE 573 Fall, 2005 N. C. State University II. III. Signup for project demos Teaching evaluations at end today copyright
Your consent to our cookies if you continue to use this website.