1 / 18

INTRODUCTION

INTRODUCTION. 1.1 Why the Internet Protocol Multimedia Subsystem 1.2 Where did it come from?. 1.1 WHY THE INTERNET PROTOCOL MULTIMEDIA SUBSYSTEM. New communication paradigm networking Internet Protocol (IP)-based mobile devices terminals large, high-precision displays

wdill
Download Presentation

INTRODUCTION

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. INTRODUCTION

  2. 1.1 Why the Internet Protocol Multimedia Subsystem 1.2 Where did it come from?

  3. 1.1 WHY THE INTERNET PROTOCOL MULTIMEDIA SUBSYSTEM • New communication paradigm • networking Internet Protocol (IP)-based mobile devices • terminals • large, high-precision displays • built in cameras and a lot of resources for applications • always-on-always-connected application devices

  4. applications • no longer isolated entities exchanging information • more exciting applications are peer-to-peer entities, which facilitate sharing • browsing • whiteboard • game experience • two-way radio session (i.e., push to talk)

  5. Figure 1.1 shows the key ingredient to a peer-to-peer connection between the new IP-enabled mobile devices • IMS • a global system used to enable applications in mobile devices to establish peer-to-peer connections

  6. True integration of voice and data services • increases productivity and overall effectiveness • The development of innovative applications integrating voice, data and multimedia will create demands for new services • presence • multimedia chat • conferencing • push to talk

  7. Figure 1.2 shows • a consolidated network where the IMS introduces multimedia session control in the packet-switched domain • at the same time brings circuit-switched functionality in the packet-switched domain

  8. Traditional mobile communication system has been divided in three parts • terminals • radio access network (RAN) • core network • With IMS-based system • "radio access network" should be replaced by "access network" • an IMS system can be deployed over non-RANs as well

  9. 1.2 WHERE DID IT COME FROM? 1.2.4 3GPP Release 5 and Release 6

  10. 1.2.4 3GPP RELEASE 5 AND RELEASE 6 • Release 5 introduced IMS as part of 3GPP standards • IMS is a standardized access-independentIP-based architecture • interworks with existing voice and data networks for both • fixed network users (e.g., PSTN, ISDN, Internet) • mobile users (e.g., GSM, CDMA) • is able to establish peer-to-peerIP communications with all types of clients with the requisite quality of services

  11. functionalities • session management • complete service delivery • e.g., registration, security, charging, bearer control, roaming • The functional content of 3GPP Release 5 was frozen in March 2002 • Release 6 is completed in 2004 • Table 1.1 shows the most important features of Release 5 and the items postponed to Release 6

  12. AKA：Authentication and Key Agreement

  13. 3GPP has defined a finite architecture for SIP-based IP multimedia service • a functionality of logical elements • a description of how elements are connected • selected protocols and procedures • Optimization for the mobile communication environment has been designed in the form of • user authentication and authorization based on mobile identities • definite rules at the user network interface for compressing SIP messages • security and policy control mechanisms that allow radio loss and recovery detection

  14. IMS development is distributed to multiple working groups in 3GPP • The working method has three different stages • stage 1 • a service description from a service user and operator point of view are evaluated • stage 2 • problems are broken down into functional elements and the interactions between the elements are identified

  15. stage 3 • all the protocols and procedures are defined in detail • Figure 1.3 shows • the most important working groups and responsibility areas that are involved in the development of IMS

More Related