Advanced SIP & IMS

Scheduled Dates (sort by: location | date)

Course Overview

This four day course examines the subject of SIP at an advanced level. The course focuses on the issues involved in SIP within IMS networks.

Audience

Anyone who requires a detailed understanding of SIP and how it operates within an IMS architecture.

Skills Gained

On completion of the course, candidates should:

• Have a detailed understanding of SIP
• Be able to explore the individual technologies used to support SIP
• Understand the present and future potential role of SIP
• Understand the implementation of SIP within 3G IMS

Prerequisites

Students require some IP knowledge. Each student is required to have access to a PC running Windows 2000 or XP with admin controls.

Course Outline

Introduction to SIP

• What is SIP?
• Why Use It?
• Marketing drivers
• SIP attributes

SIP Development

• Proposals, ongoing development and emerging standards

IP and IPv6 relationship to SIP

Properties and Operational Overview

• Key features and extensions
• Components and relative functions, Call Flows based on methods
• Addresses and URL flexibility, Syntax and Message Programming
• Servers, Clients and Request/ Response
• 3-digit HTTP Code and SIP Extensions

Session Description Protocol (SDP)

• Protocols overview
• Syntax and message structure
• Relationship to SIP

Server Functions

• Registration, Home and Away Scenarios
• Location and Directory Services
• Stateful and Stateless Servers

Call Establishment

• Connection properties
• Session Initiation and Server Location
• Outbound Proxy, INVITE Method
• Tagging, Key Header fields

Call Control

• Redirect Options
• Transfers, Conferences
• SIP Services

General Security Considerations

• Encryption and Keying, Access Control and Authentication
• Hop-by-hop and End-to-end, SIP and Firewalls, SIP and NAT
• SIP message forking and challenges, S/MIME, IPSec, TLS

RTP and RTCP

• Header, Features, Packet types
• Encapsulation, Timing, Header Compression
• RTCP
• Functions, Packet types
• Performance Statistics

SIP and Applications

• SIP and H323 Characteristics, Scalability and Services SIP
• MEGACO Comparison, Fundamental SIP services Benefits

SIP Traffic analysis

• Delegates build a SIP Network
• Capture and analyse the traffic

3GPP and IETF Development

• 3GPP - Release 5
• Important Interfaces
• 3GPP/SIP standardisation document overview
• SIP Extensions needed by 3GPP
• Service-Route and Path
• SIGCOMP Compression
• Session Policies

3GPP Rel 5 - SIP Components

• Main SIP-servers P-CSCF, I-CSCF, S-CSCF
• PSTN Gateways, A few words on MEGACO/H.248
• MGCF, BGCF and Media Gateways Conferencing support, MRFC and MRFP
• Different conferencing scenarios
• Registration of the Mobile with SIP
• HTTP Digest authentication with UMTS -Authentication Key Agreement
• Application servers, Interaction with CSCFs Back 2 Back User Agents

SIP in 3G - AAA (Authentication, Authorisation, and Accounting)

• HSS (the Home Subscriber Server) The Public and private user id.
• Service filters for application execution
• Cx Interface, Evolution of Radius - The Diameter protocol
• Diameter Base protocol 3GPP DIAMETER Applications
• Authorisation of Qos Mapping between SIP and GRPS Qos
• Policy Decision Function, The COPS protocol

SIP in 3G - Signalling and services

• Mobile to mobile, Mobile to PSTN, Integrating application servers
• Push to talk services, Open Mobile Alliance, POC Specification
• Conferencing examples with MRF and application server

SIP in 3G - Summary

• A look at 3GPP UMTS Release 6. Instant messaging, Efficient event notifications
• Interworking with other SIP-networks

Advanced SIP & IMS / GEN3031