Tuomas Nurmela · 2007
Session Initiation Protocol, SIP, provides controlplane signaling for the IP networks. SIP enables initiating, modifying and terminating sessions for a user, while maintaining neutrality to physical media capabilities and using other protocols to negotiate these. SIP assumes that the transport layer is inherently unreliable and as such provides transport layer mechanisms. For target device discovery SIP requires the use of application layer routing. Besides these, the protocol is extensible and has already been extended to support IETF presence framework and instant messaging. However, in order to perform in its core area, IP telephony call signaling, in regards to PSTNIP Telephony integration, the protocol requires further work especially in the area of emergency calls. 3GPP has decided to use SIP for signaling and work is ongoing to meet 3GPP network and IP multimedia system requirements.
Cited by 0
Joseph Ghetie · Cambridge University Press eBooks · 2008
The Session Initiation Protocol (SIP) is an Internet application layer protocol designed to control voice calls or multimedia session setups. SIP is a family of IETF-recommendations and draft standards that provide signaling specifications for Internet conferencing, VoIP, event notifications, and instant messaging over IP-based networks.
Cited by 3
Guy J. Zenner · Bell Labs Technical Journal · 2004
The way we communicate at work, at home, and while traveling is beginning to change significantly once again. Users are hungry for new converged Internet Protocol (IP) multimedia services driven by new user devices and the wider availability of broadband access networks. Many users want to be able to access a common set of services independent of how or where they initiate or receive a communication. New and traditional service providers are anxious to create offers with exciting new capabilities that use the innovative Internet paradigm to create converged voice, data, and video services. While many protocols will be used in next-generation communications networks, the Session initiation protocol (SIP) stands at the center of the new communications paradigm and is widely recognized as the primary communications protocol in evolving and next-generation networks.
Cited by 21
K. Tam, Hendra Goh · 2003
Session Initiation Protocol (SIP) is a new and emerging protocol that is used to establish and release the connection between two end systems. It is used in preference to the older H323 protocol. Both protocols provide a similar set of services but SIP is much simpler because it has less logical components. This paper describes the implementation of a VoIP application using SIP as the handshaking protocol. The implementation of the SIP is performed with the aid of Libsip++ library from Columbia University. The audio signal is transmitted via the Microsoft's Windows API. The VoIP system was created using Delphi 5.0. As the Lipsip++ was created using Microsoft's C++ 6.0, some incompatibility problem arises. There will be a section discussing these problems and it's solution. The VoIP system consists of a SIP server and two user agent. The SIP server is linked to a HTTP server to facilitate the update of user configuration via Internet. This paper will also introduce a new function called chatboard that will facilitate users with speech handicap.
Cited by 66
2016
This chapter focuses on the basic elements for a telephone system as used in company environments. Each telephone system needs to interoperate with the public-switched telephone network (PSTN). The session initiation protocol (SIP) was originally specified in 1999, and the latest version dates from 2004 as RFC 3261. It is a voice-over-IP (VoIP) standard. The chapter explains how conferences are established using SIP, and shows the implementation methods within the SIP event framework. SIP protocols have problems to pass through firewalls and need the mechanisms for a traversal. Next, the chapter provides an overview of the most common application interfaces (APIs) for SIP. Consequently, security and safety of the overall system are a concern. The chapter handles SIP and VoIP security solutions and takes a look at the safety as well. Finally, it talks about planning of a VoIP company telephone system.
Cited by 5
Etag "eb-c-ea · 1997
This document is an Internet-Draft. Internet-Drafts are working documents of the Internet Engineering Task Force (IETF), its areas, and its working groups. Note that other groups may also distribute working documents as Internet-Drafts. Internet-Drafts are draft documents valid for a maximum of six months and may be updated, replaced, or obsoleted by other documents at any time. It is inappropriate to use Internet-Drafts as reference material or to cite them other than as ‘‘work in progress’’. To learn the current status of any Internet-Draft, please check the ‘‘1id-abstracts.txt’ ’ listing contained in the Internet-Drafts Shadow Directories on ftp.is.co.za (Africa), nic.nordu.net (Europe), munnari.oz.au (Pacific Rim), ds.internic.net (US East Coast), or ftp.isi.edu (US West Coast). Distribution of this document is unlimited. Many styles of multimedia conferencing are likely to coexist on the Internet, and many of them share the need to invite users to participate. The Session Initiation Protocol (SIP) is a simple protocol designed to enable the invitation of users to participate in such multimedia sessions. It is not tied to any specific conference control scheme. In particular, it aims to enable user mobility by relaying and redirecting invitations to a user’s current location. This document is a product of the Multi-party Multimedia Session Control (MMUSIC) working group of the Internet Engineering Task Force. Comments are solicited and should be addressed to the working group’s mailing list at
Cited by 0
Etag "de-dc-dc · 1998
This document is an Internet-Draft. Internet-Drafts are working documents of the Internet Engineering Task Force (IETF), its areas, and its working groups. Note that other groups may also distribute working documents as Internet-Drafts. Internet-Drafts are draft documents valid for a maximum of six months and may be updated, replaced, or obsoleted by other documents at any time. It is inappropriate to use Internet-Drafts as reference material or to cite them other than as ‘‘work in progress’’. To learn the current status of any Internet-Draft, please check the ‘‘1id-abstracts.txt’ ’ listing contained in the Internet-Drafts Shadow Directories on ftp.is.co.za (Africa), nic.nordu.net (Europe), munnari.oz.au (Pacific Rim), ds.internic.net (US East Coast), or ftp.isi.edu (US West Coast). Distribution of this document is unlimited. Many styles of multimedia conferencing are likely to coexist on the Internet, and many of them share the need to invite users to participate. The Session Initiation Protocol (SIP) is a simple protocol designed to enable the invitation of users to participate in such multimedia sessions. It is not tied to any specific conference control scheme. In particular, it aims to enable user mobility by relaying and redirecting invitations to a user’s current location. This document is a product of the Multi-party Multimedia Session Control (MMUSIC) working group of the Internet Engineering Task Force. Comments are solicited and should be addressed to the working group’s mailing list at
Cited by 0
Auerbach Publications eBooks · 2009
This document describes Session Initiation Protocol (SIP), an application-layer control (signaling) protocol for creating, modifying, and terminating sessions with one or more participants. These sessions include Internet telephone calls, multimedia distribution, and multimedia conferences.
Cited by 4,388
Etag "fcc-cd-e · 1997
This document is an Internet-Draft. Internet-Drafts are working documents of the Internet Engineering Task Force (IETF), its areas, and its working groups. Note that other groups may also distribute working documents as Internet-Drafts. Internet-Drafts are draft documents valid for a maximum of six months and may be updated, replaced, or obsoleted by other documents at any time. It is inappropriate to use Internet-Drafts as reference material or to cite them other than as ‘‘work in progress’’. To learn the current status of any Internet-Draft, please check the ‘‘1id-abstracts.txt’ ’ listing contained in the Internet-Drafts Shadow Directories on ftp.is.co.za (Africa), nic.nordu.net (Europe), munnari.oz.au (Pacific Rim), ds.internic.net (US East Coast), or ftp.isi.edu (US West Coast). Distribution of this document is unlimited. Many styles of multimedia conferencing are likely to coexist on the Internet, and many of them share the need to invite users to participate. The Session Initiation Protocol (SIP) is a simple protocol designed to enable the invitation of users to participate in such multimedia sessions. It is not tied to any specific conference control scheme. In particular, it aims to enable user mobility by relaying and redirecting invitations to a user’s current location. This document is a product of the Multi-party Multimedia Session Control (MMUSIC) working group of the Internet Engineering Task Force. Comments are solicited and should be addressed to the working group’s mailing list at
Cited by 0
Etag "fcb-fcb-adfc, H. Schulzrinne, E. Schooler · 1997
This document is an Internet-Draft. Internet-Drafts are working documents of the Internet Engineering Task Force (IETF), its areas, and its working groups. Note that other groups may also distribute working documents as Internet-Drafts. Internet-Drafts are draft documents valid for a maximum of six months and may be updated, replaced, or obsoleted by other documents at any time. It is inappropriate to use Internet-Drafts as reference material or to cite them other than as ‘‘work in progress’’. To learn the current status of any Internet-Draft, please check the ‘‘1id-abstracts.txt’ ’ listing contained in the Internet-Drafts Shadow Directories on ftp.is.co.za (Africa), nic.nordu.net (Europe), munnari.oz.au (Pacific Rim), ds.internic.net (US East Coast), or ftp.isi.edu (US West Coast). Distribution of this document is unlimited. Many styles of multimedia conferencing are likely to coexist on the Internet, and many of them share the need to invite users to participate. The Session Initiation Protocol (SIP) is a simple protocol designed to enable the invitation of users to participate in such multimedia sessions. It is not tied to any specific conference control scheme, providing support for either loosely or tightly controlled sessions. In particular, it aims to enable user mobility by relaying and redirecting invitations to a user’s current location. This document is a product of the Multiparty Multimedia Session Control (MMUSIC) working group of the Internet Engineering Task Force. Comments are solicited and should be addressed to the working group’s mailing list at
Cited by 0
Anand Chavali, Written Anand Chavali, Prof Ray Nettleton et al. · 2003
The final copy of this thesis has been examined by the signatories, and we find that both the content and the form meet acceptable presentation standards of scholarly work in the above mentioned discipline. Anand Chavali (M.S., Telecommunications) Implementing Role-based Authorization capabilities in the Session Initiation Protocol (SIP) Thesis directed by Professor Douglas Sicker This thesis presents an approach to providing role-based authorization capabilities for the Session Initiation Protocol (SIP). SIP defines various methods for performing authentication. Authorization, however, is not defined explicitly and is generally based on identity. This does not scale well in multi-domain scenarios. In order to facilitate a greater level of granularity and scalability for authorization in SIP, new mechanisms need to be defined. This thesis describes the implementation of role-based authorization capabilities as part of a federation.
Cited by 0
Etag "fd-a-c · 1998
This document is an Internet-Draft. Internet-Drafts are working documents of the Internet Engineering Task Force (IETF), its areas, and its working groups. Note that other groups may also distribute working documents as Internet-Drafts. Internet-Drafts are draft documents valid for a maximum of six months and may be updated, replaced, or obsoleted by other documents at any time. It is inappropriate to use Internet-Drafts as reference material or to cite them other than as ‘‘work in progress’’. To learn the current status of any Internet-Draft, please check the ‘‘1id-abstracts.txt’ ’ listing contained in the Internet-Drafts Shadow Directories on ftp.is.co.za (Africa), nic.nordu.net (Europe), munnari.oz.au (Pacific Rim), ftp.ietf.org (US East Coast), or ftp.isi.edu (US West Coast). Distribution of this document is unlimited. The Session Initiation Protocol (SIP) is an applicationlayer control (signaling) protocol for creating, modifying and terminating sessions with one or more participants. These sessions include Internet multimedia conferences, Internet telephone calls and multimedia distribution. Members in a session can communicate via multicast or via a mesh of unicast relations, or a combination of these. SIP invitations used to create sessions carry session descriptions which allow participants to agree on a set of compatible media types. It supports user mobility by proxying and redirecting requests to the user’s current location. Users can register their current location. SIP is not tied to any particular conference control protocol. SIP is designed to be independent of the Handley/Schulzrinne/Schooler/Rosenberg [Page 1] Internet Draft SIP September 18, 1998 1
Cited by 0
Etag "fce-c-affbc · 1998
This document is an Internet-Draft. Internet-Drafts are working documents of the Internet Engineering Task Force (IETF), its areas, and its working groups. Note that other groups may also distribute working documents as Internet-Drafts. Internet-Drafts are draft documents valid for a maximum of six months and may be updated, replaced, or obsoleted by other documents at any time. It is inappropriate to use Internet-Drafts as reference material or to cite them other than as ‘‘work in progress’’. To learn the current status of any Internet-Draft, please check the ‘‘1id-abstracts.txt’ ’ listing contained in the Internet-Drafts Shadow Directories on ftp.is.co.za (Africa), nic.nordu.net (Europe), munnari.oz.au (Pacific Rim), ftp.ietf.org (US East Coast), or ftp.isi.edu (US West Coast). Distribution of this document is unlimited. The Session Initiation Protocol (SIP) is an applicationlayer control (signaling) protocol for creating, modifying and terminating sessions with one or more participants. These sessions include Internet multimedia conferences, Internet telephone calls and multimedia distribution. Members in a session can communicate via multicast or via a mesh of unicast relations, or a combination of these. SIP invitations used to create sessions carry session descriptions which allow participants to agree on a set of compatible media types. It supports user mobility by proxying and redirecting requests to the user’s current location. Users can register their current location. SIP is not tied to any particular conference control protocol. SIP is designed to be independent of the Handley/Schulzrinne/Schooler/Rosenberg [Page 1] Internet Draft SIP July 16, 1998 1
Cited by 0
Osama Younes, Umar Albalawi · Sensors · 2022
The session initiation protocol (SIP) is widely used for multimedia communication as a signaling protocol for managing, establishing, maintaining, and terminating multimedia sessions among participants. However, SIP is exposed to a variety of security threats. To overcome the security flaws of SIP, it needs to support a number of security services: authentication, confidentiality, and integrity. Few solutions have been introduced in the literature to secure SIP, which can support these security services. Most of them are based on internet security standards and have many drawbacks. This work introduces a new protocol for securing SIP called secure-SIP (S-SIP). S-SIP consists of two protocols: the SIP authentication (A-SIP) protocol and the key management and protection (KP-SIP) protocol. A-SIP is a novel mutual authentication protocol. KP-SIP is used to secure SIP signaling messages and exchange session keys among entities. It provides different security services for SIP: integrity, confidentiality, and key management. A-SIP is based on the secure remote password (SRP) protocol, which is one of standard password-based authentication protocols supported by the transport layer security (TLS) standard. However, A-SIP is more secure and efficient than SRP because it covers its security flaws and weaknesses, which are illustrated and proven in this work. Through comprehensive informal and formal security analyses, we demonstrate that S-SIP is secure and can address SIP vulnerabilities. In addition, the proposed protocols were compared with many related protocols in terms of security and performance. It was found that the proposed protocols are more secure and have better performance.
Cited by 9Open access
Harold Zheng, Sherry Wang · InTech eBooks · 2011
The Session Initiation Protocol (SIP) It works independently of underlying transport protocols and the type of sessions that are being established. The SIP is a core protocol for initiating, managing, and terminating peer-to-peer communication sessions on the Internet. These sessions may be text, voice, video, or a combination of these. SIP sessions involve one or more participants and can use unicast or multicast communications. The SIP proposal began in 1995 in IETF Multiparty Multimedia Session Control (MMUSIC) Working Group (WG), then from February 1996 (draft-ietf-mmusic-sip-00, 15 ASCII pages with one request type) to March 1999 (RFC 2543, 153 ASCII pages, 6 methods) the first RFC was proposed. In November 1999, SIP WG was formed. In December 2000, it was recognized that the amount of work at SIP WG was becoming unmanageable, and consequently, numerous individual subsections were formed. In April 2001, a proposal for splitting SIP WG into SIP and SIPPING was announced. In June 2002, the RFC 2543 was obsolete and replaced by RFC 3261 Today, there are over 100 IETF RFCs related to SIP and SIP implementations widely available. The SIP Status can be found at: http://tools.ietf.org/wg/sip/. The Table
Cited by 1Open access
Anneli Folkesson · 2005
Cited by 4
Etag "fcd--bbc · 1998
This document is an Internet-Draft. Internet-Drafts are working documents of the Internet Engineering Task Force (IETF), its areas, and its working groups. Note that other groups may also distribute working documents as Internet-Drafts. Internet-Drafts are draft documents valid for a maximum of six months and may be updated, replaced, or obsoleted by other documents at any time. It is inappropriate to use Internet-Drafts as reference material or to cite them other than as ‘‘work in progress’’. To learn the current status of any Internet-Draft, please check the ‘‘1id-abstracts.txt’ ’ listing contained in the Internet-Drafts Shadow Directories on ftp.is.co.za (Africa), nic.nordu.net (Europe), munnari.oz.au (Pacific Rim), ds.internic.net (US East Coast), or ftp.isi.edu (US West Coast). Distribution of this document is unlimited. Many styles of multimedia conferencing are likely to coexist on the Internet, and many of them share the need to invite users to participate. The Session Initiation Protocol (SIP) is a simple protocol designed to enable the invitation of users to participate in such multimedia sessions. It is not tied to any specific conference control scheme. In particular, it aims to enable user mobility by relaying and redirecting invitations to a user’s current location. This document is a product of the Multi-party Multimedia Session Control (MMUSIC) working group of the Internet Engineering Task Force. Comments are solicited and should be addressed to the working group’s mailing list at
Cited by 0
2016
Cited by 1
Jonathan Rosenberg, Henning Schulzrinne, Gonzalo Camarillo et al. · 2002
Cited by 2,990
Etag "b-e-b, H. Schulzrinne, E. Schooler · 1997
Many styles of multimedia conferencing are likely to co-exist on the Internet, and many of them share the need to invite users to participate. The Session Initiation Protocol (SIP) is a simple protocol designed to enable the invitation of users to participate in such multimedia sessions. It is not tied to any specific conference control scheme, providing support for either loosely or tightly controlled sessions. In particular, it aims to enable user mobility by relaying and redirecting invitations to a user’s current location. This document is a product of the Multiparty Multimedia Session Control (MMUSIC) working group of the Internet Engineering Task Force. Comments are solicited and should be addressed to the working group’s mailing list at
Cited by 0