SIP Drafts: Mobility

Additional material related to SIP and mobility can be found at a Telcordia web site. Documents related to 3GPP and SIP can be found on the 3GPP ftp server.

3GPP IP Multimedia CN Subsystem - Session establishment flows
K. Drage et al. February 2001.
This document provides an overview by means of signalling flows of the methods by which 3GPP wishes to uses SIP for the specification of the IP Multimedia CN subsystem for the purposes of establishing sessions between user equipment.

3GPP IP Multimedia CN Subsystem - Registration flows
K. Drage et al. February 2001.
This document provides an overview by means of signalling flows of the methods by which 3GPP wishes to uses SIP for the specification of the IP Multimedia CN subsystem for the purposes of registering user equipment.

Pico SIP
M. O'Doherty
January 2001.
This document defines an extension to the SIP protocol to allow it be used in adhoc networks or Pico Networks. It leverages the direct, client to client session initiation capabilities of SIP, although there may be applications where the redirect and proxying abilities will be important also. Note the intention is not to imply that SIP is inherently the best protocol for such networks, but to recognize that there will likely be many SIP based applications in existence and that it would be good to allow these applications work with as little change as possible in this different type of network.

Supporting Mobility for Multimedia with SIP
F. Vakil, A. Dutta, J-C. Chen, M. Tauil, S. Baba, N. Nakajima, Y. Shobatake, H. Schulzrinne
November 2000
Session Initiation Protocol (SIP) is rapidly gaining widespread acceptance as the signaling protocol of choice for fixed and mobile Internet multimedia and telephony services. This document focuses on how one can utilize SIP to support real-time multimedia applications of roaming users on an end-to-end basis from users' terminals without reliance on network elements.

Supporting Mobility for TCP with SIP
F. Vakil, A. Dutta, J-C. Chen, M. Tauil, S. Baba, N. Nakajima, Y. Shobatake, H. Schulzrinne
November 2000
This document proposes an approach for using SIP to support mobility for TCP-based applications in a mobile Internet. The proposed approach utilizes a TCP tracking agent, dubbed as SIP_EYE, in mobile stations as well as SIP INFO method to spoof constant endpoints for mobile TCP connections and supports mobile TCP applications in a SIP environment without any changes to TCP.

Supporting Service Mobility with SIP
F. Vakil, A. Dutta, J-C. Chen, M. Tauil, S. Baba, N. Nakajima, Y. Shobatake, H. Schulzrinne
November 2000
Session Initiation Protocol (SIP) can be used to provide means of personal, terminal, and service mobility in a mobile Internet. This document describes two schemes for supporting service mobility in a SIP environment. The first assumes that call states are maintained and stored within the network and home network always controls calls and services of its subscribers. The second assumes that call states are stored in the mobile stations (MSs) and managed in a distributed manner, and the visited network controls users' calls and services.

SIP Registration
H. Schulzrinne. October 2000.
SIP registration provides personal, pre-call terminal and service mobility. We describe the registration process in detail, considering different options for roaming users.

Mobility Management in a SIP Environment: Requirements, Functions and Issues
F. Vakil, A. Dutta, J-C. Chen, M. Tauil, S. Baba, N. Nakajima, Y. Shobatake, H. Schulzrinne
November 2000.
Mobility is rapidly becoming a rule rather than an exception in communication services and SIP is gaining widespread acceptance as the signaling protocol for multimedia applications on the Internet. Thus, it is essential to develop a mobility management scheme that utilizes salient features and capabilities of SIP as well as other protocols (e.g., mobile IP) to support mobile services efficiently. Without providing any specific solution, this document presents preliminary requirements and identifies the issues that need to be resolved in order to develop a mobility management scheme for supporting multimedia applications in a SIP signaling and control environment.

3GPP documents:

Last updated by Henning Schulzrinne