Multimedia Networking

7.4.3 SIP
Home
Introduction
7.1 Multimedia Networking Applications
7.1.1 Examples of Multimedia Applications
7.1.2 Hurdles for Multimedia in Today's Internet
7.1.3 How Should the Internet Evolve to Support Multimedia Better?
7.1.4 Audio and Video Compression
7.2 Streamimg Stored Audio and Video
7.2.1 Accessing Audio and Video Through a Web Server
7.2.2 Sending Multimedia from a Streaming Server to a Helper Application
7.2.3 Real-Time Streaming Protocol (RTSP)
7.3 Making the Best of the Best-Effort Service: An Internet Phone Example
7.3.1 The Limitations of a Best-Effort Service
7.3.2 Removing Jitter at the Receiver for Audio
7.3.3 Recovering from Packet Loss
7.4 Protocols for Real-Time Interactive Applications
7.4.1 RTP
7.4.2 RTP Control Protocol (RTCP)
7.4.3 SIP
7.4.4 H.323
7.5 Distributing Multimedia: Content Distribution Networks
7.6 Beyond Best Effort
7.6.1 Scenario 1: A 1 Mbps Audio Application and an FTP
7.6.2 Scenario 2: A 1 Mbps Audio Application and a High-Priority FTP Transfer
7.6.3 Scenario 3: A Misbehaving Audio Application and an FTP Transfer
7.6.4 Scenario 4: Two 1 Mbps Audio Applications over an Overload 1.5 Mbps Link
7.7 Scheduling and Policing Mechanisms
7.7.1 Scheduling Mechanisms
7.7.2 Policing: The Leaky Bucket
7.8 Intergrated Services and Differentiated Services
7.8.1 Intserv
7.8.2 Diffserv
7.9 RSVP
7.9.1 The Essence of RSVP
7.9.2 A Few Simple Examples
SIP

SIP is a lightweight protocol that does the following:
  • It provides mechanisms for establishing calls between a caller and a callee over an IP network.
  • It provieds mechanisms for the caller to derermine the current IP address of the callee.
  • It provides mechanisms for call management, such as adding new media streams during the call, changing the encoding during the call, inviting new participants during the call, call transfer, and call holding.
 
SIP Address
Many--if not most--SIP addresses to resemble e-mail addresses.  An intersting feature of SIP addresses is that they can be included in Web pages, just as people's e-mail addresses are included in Web pages with mailto URL.