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This paper compares two telecommunication standards for plaintext transmission over Session Initiation Protocol (SIP): SIP extension for Text over Internet Protocol (ToIP) and SIP extension for Instant Messaging (IM). ToIP provides a real-time text service, while IM provides a near realtime text service. Originally, SIP is a Voice over Internet Protocol (VoIP) call signaling protocol that uses Real-time...
This paper discusses the viability of using Session Initiation Protocol (SIP) transport for Smart Grid signaling. Smart grids will jointly optimize energy production and demand, in a scenario with millions of smart meters and microenergy sources (e.g. solar panels or electric cars). This will place stringent requirements on telco networks. Information technologies will have to provide scalable signaling...
The wide scale deployment of Internet combined with several advancements in hardware and software technologies created opportunities for several Internet based applications such as Voice Over IP (VoIP) that involves the delivery of voice, video and data to the end user. SIP, the Session Initiation Protocol, is a signaling protocol for Internet conferencing, telephony, presence, events notification...
SIP-based instant messaging (IM) is currently a quite hot issue in the SIP world. Two approaches, pager-mode IM and session-mode IM, have been explored for implementation. This paper provides an in-depth analysis of the first method through an example, and makes improvement to the second by presenting specific signaling and media messages. Solutions to security problems are also discussed in detail...
SIP is a popular signaling protocol. In SIP, RFC4474 (SIP Identity) is used to verify integrity of a flow from a Proxy to a terminal of a callee while RFC3261 (Proxy Authenticate) is used to ensure authenticity of a flow from a terminal of a caller to a Proxy. However Proxy Authenticate only ensures authenticity and cannot verify the integrity of a flow. Thus, the flow from a terminal of caller to...
Session Initiation Protocol (SIP) is a signaling protocol for Internet conferencing, telephony, presence, events notification, and instant messaging. SIP is an application-layer protocol and operates on the TCP/IP stack, which means that it inherits all associated IP vulnerabilities. It has, therefore, possibility that SIP systems can be damaged by Flooding-based Denial of Service (DoS). Previous...
This work proposes the use of a weighted Finite State Machine to serve as a computational model for analyzing the performance of communication protocols. The new model's use is demonstrated by concentrating on web-based services, Internet level-5 protocols in particular, because when the latter are ported onto mobile handsets, fail to meet performance expectations. The same modeling technique can...
The communication as we know it is about to change, the simple peer-to-peer voice type of calls being replaced by a mix of different media belonging to the same session. Network-based speech processing technologies are increasingly used, adding flexibility, speed and naturalness to various telecom services. For instance, text-to-speech (TTS) synthesis is already incorporated into commercial telephony...
Presence is a service that allows a user to be informed about the reachability, availability, and willingness of communication of another user. Presence service has become a key enabler for many popular applications such as instant messaging and push-to-talk. Traffic to a presence server is resulted by user behaviors such as login/logout, online status modification, and automatic status refresh by...
In order to seamlessly interact with everyday objects embedded with wireless sensors, we need diverse messaging abstractions that support convenient application-level interactions with sensor nodes. We have developed TinySIP with the goal of providing a unifying messaging protocol that not only supports distributed interactions among sensor nodes but also enables users on a traditional network to...
Today, mobile learning has become the heir of electronic learning. M-learning provides a new learning experience, even though it introduces new research challenges and opens issues which need to be faced. This paper proposes a new platform based on the concepts of push services, instant messaging, and SIP (Session Initiation Protocol). The platform addresses the actual conceptual and technological...
There are many instant message and presence services in the world. The services are not inter-operable since they take their own way to implement services. To solve this problem, IETF IMPP WG defined service models for presence and instant message without concern with any other protocols. In IETF SIMPLE working group, many SIP-based standards on the IMPP have been developed or are being developed...
Various forms of ad-hoc networking are slowly emerging. However, a wider diffusion of ad-hoc networking in everyday life will only be possible if existing common applications are adapted for use in ad-hoc networks. There has been some work on adapting Internet-based applications to function in ad-hoc networks. Yet, in order to make ad-hoc networking even more useful and interesting to people, applications...
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