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Network evolution towards IP Multimedia Subsystem
Abstract
As opposed to "mobile Next Generation Network" approach aiming at just carrying circuit services on top of the Internet Protocol (IP), the IP Multimedia Subsystem (IMS) offers operators the opportunity to build an open IP based service infrastructure that will enable an easy deployment of new rich multimedia communication services mixing telecom and data services. Alcatel IMS solution is based on 3GPP specifications but is also able to provide common IMS services for mobile and other access networks including fixed ones. Before trying to emulate circuit switched domain, IMS will first provide new services (such as Instant Messaging, Presence, Push to Talkover Cellular (PoC)) that are not too demanding for the underlying radio access network. These services will attract customers and create new telecommunication needs without inducing the technical risks and costs of speech with stringent quality over packet radio.
... Time je pokrenuta evolucija prvobitne mobilne mreže bazirane na tehnologiji komutacije kanala (engl. Circuit-Switched, skraćeno CS) prema IP baziranoj mreži [6,29]. U ovom procesu evolucija mobilnih telekomunikacija tekla je u dva paralelna pravca: evolucija radio pristupnih tehnologija (GSM, GPRS, UMTS, HDSPA, HSUPA, LTE) i evolucija arhitekture odgovarajuće podržavajuće mreže u jezgru (CS tehnologija, dodatna PS tehnologija, softswitch u CS mreži, IMS, 3G-WLAN integracija, TISPAN (xDSL) i PacketCable) [12]. ...
... Ideja je bila realizacija multimedijalnih usluga i Internet aplikacija sa bilo koje lokacije i u bilo kojem trenutku putem mobilnih ćelijskih pristupnih tehnologija. Međutim, u kasnijim izdanjima specifikacija IMS standarda, IMS postajao je nezavisan od tehnologije pristupa podržavajući WLAN, fiksne pristupne mreže kao što su xDSL i kablovske pristupne mreže [6,29]. Slijedi pregled evolucije bežičnih telekomunikacionih mreža [16]. ...
The IP Multimedia Subsystem (IMS) is a framework initially designed for third
generation (3G) mobile cellular networks as an enabler for voice communication over
IP networks, i.e. Voice over IP (VoIP). Consequently, a completely new platform for
providing various IP multimedia services across different access networks was created.
The platform enabled fast, efficient and inexpensive deployment of new advanced
services supporting also existing services. At the time of writing the thesis IMS was
popular and well studied in literature for realizing VoIP services. The aim of the
thesis was to exploit IMS to support also video multimedia services, in particular,
IPTV Video on Demand (VoD) services. The resulting system consisted of the
following network elements: a media server that delivers on-demand multimedia
content to clients, IMS clients that obtain video content on-demand, and the
OpenIMS framework (an open source implementation of IMS) for signaling control.
The main thesis outcomes are: (i) studying the general concepts underlying the
IMS framework with emphasis on its functional elements; (ii) exploring the essential
protocols used for delivering multimedia content and controlling multimedia sessions
(e.g. SIP, RTSP, RTP); (iii) system design and implementation of a multimedia VoD
service with the IMS at its heart; (iv) detailed protocol analysis while the system
is operating; (v) describing the experience gained during the system installation
and configuration process. Finally, potential future IMS-based implementations and
services were discussed.
... An IMS-based network [9] seems a good way to achieve that goal. for three main reasons: it already merges the Internet and the telecom worlds; IP-based developments are easier than with current operator networks; and basic IMS services are comparable to the ones already provided by widespread instant messaging and VoIP tools (e.g. ...
The explosion of social networking sites has provided exciting opportunities for third party application developers on certain websites. However, the social network of a person goes far beyond the "list of friends" model currently used. This paper investigates techniques for collecting social network information about a user using their communication services, their communication interactions and their location. Together, these techniques model this information in a way that enables richer, more useful applications based on their real social network. Sample services are presented to illustrate these techniques, the problems they resolve, and especially the future challenges they reveal.
... IMS refers to a functional architecture for multimedia service delivery, based upon Internet protocols. Its aim is to merge Internet and cellular worlds, in order to enable rich multimedia communications [1, 2]. It is specified in the 3rd Generation Partnership Project (3GPP). ...
The IMS (IP Multimedia Subsystem) architecture is the key control for next generation networks (NGN). IMS gives network operators the opportunity to extend their services, including voice and multimedia communications and deliver them in new environments with new goals. Its security is paramount, especially authentication. In IMS, authentication is divided into two phases a PS (Packet-Switch) domain-level with the 3GPP-AKA protocol, and a second at IMS level using the IMS-AKA protocol. The latter is based on 3GPP-AKA, which leads to a large duplication of steps between the two phases. Some Works have tried to reduce this duplication and increase the IMS-AKA efficiency, but they add new vulnerabilities to IMS-AKA. The aim of this paper is to solve the security problems of IMS-AKA while maintaining good efficiency.
... One of the most important questions for telecommunication companies developing IPTV is regarding a successful digital video strategy and the associated challenges related to network architecture, content acquisition and management, storage and delivery. At the same time, it is important to consider the newly started developments towards the research and development of the IP Multimedia Subsystem (IMS) [7,19,16]. IMS represents a new framework, basically specified for mobile networking, to provide IP-based telecommunication services. Fundamental elements in IMS are the convergence of voice, data and multimedia services, integration of mobile and Internet domains as well as facilities created to allow consumers to access, create, consume and share digital content by using interoperable devices. ...
This is reporting on research and development focused on multimedia
distribution over Internet Protocol (IP), which is done within the research
project "Routing in Overlay Networks (ROVER)", recently granted by the NoE
EuroNGI. The foundation of multimedia distribution is provided by several
components, the most important ones are services, content distribution chain,
protocols and standards. The fundamental idea is to use the Internet for
content acquisition, management and delivery as well as an Internet Protocol
Television (IPTV) infrastructure with Quality of Service (QoS) facilities.
Furthermore, an important goal is to offer the end user the so-called triple
play, which means grouping together Internet access, TV and telephone service
into one subscription on a broadband connection. Other important issues are
regarding billing, copy right issues encryption and authentication.
The convergence between fixed and mobile services that is actually happening in
the wide and local area networking is expected to happen in the home networking
as well. This puts
an extra burden on multimedia distribution, which means that wireless access
solutions of different types (e.g., WiMAX) must be considered as well. The
consequence of throwing triple play into wireless services is the upcome of
quadruple play. The research project is therefore considering the recently
advanced IP Multimedia Subsystem (IMS), which is a set of technology standards
put forth by the Internet Engineering Task Force (IETF) and two third
Generation Partnership Project groups (3GPP and 3GPP2). IMS offers a wide range
of multimedia services over a single IP infrastructure, it provides
authentication and, for wireless services, roaming capabilities. Furthermore,
the research project is also considering overlay routing as an alternative
solution for content
distribution.
Ubiquités Sensor Network (USN) is a conceptual network built over existing physical networks. It makes use of sensed data and provides knowledge services to anyone, anywhere and at anytime, and where the information is generated by using context awareness. Smart wearable devices and USNs are emerging rapidly providing many reliable services facilitating people life. Those very useful small end terminals and devices require a global communication substrate to provide a comprehensive global end user service. In 2010, the ITU-T provided the requirements to support USN applications and services in the Next Génération Network (NGN) environment to exploit the advantages of the core network. One of the main promising markets for the USN application and services is the e-Health. It provides continuous patients’ monitoring and enables a great improvement in medical services. On the other hand, Vehicular Ad-Hoc NETwork (VANET) is an emerging technology, which provides intelligent communication between mobile vehicles. Integrating VANET with USN has a great potential to improve road safety and traffic efficiency. Most VANET applications are applied in real time and they are sensitive to delay, especially those related to safety and health. In this work, we propose to use IP Multimedia Subsystem (IMS) as a service controller sub-layer in the USN environment providing a global substrate for a comprehensive end-to-end service. Moreover, we propose to integrate VANETs with USN for more rich applications and facilities, which will ease the life of humans. We started studying the challenges on the road to achieve this goal
The Next Generation Network will encompass diverse access technologies, devices and services. In order to provide a user the best service experience in that circumstance, the NGN will cover not only terminal mobility, which is the main concern in current mobile network domain, but also personal mobility and service mobility. The IMS architecture, which is considered as session control layer in NGN, and SIP is the basic protocols for controlling sessions in IMS. Therefore, Session mobility management in NGN is tightly coupled with IMS and SIP. There could be a few ways how to control session mobility in IMS. Basically, Session mobility can be controlled in UE based or network based. In UE based approach, a UE initiates the session transfer while network initiates a session transfer in network based approach. This paper especially focuses on the network initiated session transfer. This paper describes how the network initiated session transfer using SIP is implemented in IMS in detail.
The use of text messagingshort message service (SMS)for
communicating with automated services and applications is
increasing. However, since SMS was designed as a simple
person-to-person channel, it includes no support for imposing any
structure on the messages sent; it is entirely free-form and all
messages and their contents are treated equally. While the channel
provides users with great freedom of expression in person-to-person
communications (e.g., "c u l8r :)"), the lack of ability to place
any constraints or special measures on user input limits the
sophistication and security of the automated services it can
support. For example, users are provided with no assistance in
conforming to required command syntax. In addition, any personal
identification numbers (PINs) or passwords sent are stored in clear
text in the outbox, as are the contents of all other messagesa
clear compromise of security. These limitations lead to service
providers' implementing elaborate countermeasures which impact the
user experience (e.g., the call-back for transaction authorization
used by PayPal in its SMS-based payment offering). Bell Labs and BT
are creating a channel between third party service providers and an
IP Multimedia Subsystem (IMS) mobile client to permit the easy
execution of zeroinstallation services and applications on a user's
terminal. Using a very thin client integrated into the IMS
software, a service provider can specify structured interactions
with its customers and conduct them securely. In addition to
exploring the ergonomic and intuitive management of
machineto-person (M2P) interactions, the collaboration is studying
how to exploit this channel to increase user adoption of other new
services, such as providing a convenient user evolution path from
thin M2P interactions to rich, full-featured terminal software and
promoting these services within the user's contact community.
© 2008 Alcatel-Lucent.
In this paper, we have designed and implemented the system architecture for extensible mobile instant messaging and presence service over the IMS. More specifically, we have implemented the SIP proxy servers for IMS P-CSCF and S-CSCF for the realization of extensible mobile instant messaging and presence service. The salient feature of the proposed system architecture is that the architecture is based on IETF SIMPLE standard, and the extensibility of the presence service is achieved by implementing theOMA IMPS specification. An efficient algorithm is presented for achieving the extensible presence service over IMS. The implementation results show that the proposed system architecture can effectively provide not only interoperability but also extensibility for representing userspsila status information in the 3 G mobile communication environment.
One of the key factors of next generation networks (NGN) is opening up the capabilities of the network. Parlay Group leads the standard, so called Parlay/OSA API, to open up the networks by defining, establishing, and supporting a common industry-standard APIs. Parlay Group also specifies the Parlay Web services API, also known as Parlay X API, which is much simpler than Parlay/OSA API to enable IT developers to use it without network expertise. One of Parlay X API is third party call (TPC) API which provides simple API for the purpose of creating and managing the call by the third party. IMS was devised originally by 3GPP for mobile networks, but currently it is accepted widely as a reference model of NGN even in fixed network domains. IMS has an interface called ISC to open the network capabilities. This paper overviews how Parlay X Web services can be supported in IMS in an architectural perspective, and discusses how the third party call can be implemented in IMS using Parlay X TPC APIs
The instant messaging is a key service for mobile operators as it helps them in maintaining a central position in the communication value chain. Instant messaging makes it possible for the mobile operators to federate a whole range of services using a common interface and buddy list. It enables the operators to retain control over their customer base and remain independent of other service providers. Alcatel has been developing the Alcatel 5324 Instant Messaging product. The aim is to generate a multi-terminal instant messaging solution that can interoperate with other instant messaging services and products, and which can be easily integrated into existing networks.
The features of the Internet Protocol (IP) Multimedia Subsystem (IMS) are discussed. The IMS architecture adds functionality to the Universal Mobile Telecommunications system (UMTS) network, a true enabler for IP multimedia services like voice over IP, video and messaging services. The architecture relies on the concept of separating the IP data plane and the session control lane, based on the use of the Internet Engineering Task force Session Initiation Protocol (IETF SIP). Support for service-based local policy control, an important featuer of the deployment of IMS and non-IMS multimedia services that comply with third generation partnership project (3GPP) standards is also discussed.