Showing papers on "IP Multimedia Subsystem published in 2002"

Voice mail in a voice over IP telephone system

Abstract: In a voice over IP system, an IP telephone includes an LED lamp that indicates a voice message has been stored in a remote voice mail system. The IP telephone can then access that voice message. The message can also be moved from one remote site to another.

Multimedia Communication Systems: Techniques, Standards, and Networks

Abstract: From the Book: Preface The past years have seen an explosion in the use of digital media. Industry is making significant investments to deliver digital audio, image and video information to consumers and customers. A new infrastructure of digital audio, image and video recorders and players; online services and electronic commerce is rapidly being deployed. At the same time, major corporations are converting their audio, image and video archives to an electronic form. Digital media offer several distinct advantages over analog media. The quality of digital audio, image and video signals is higher than that of their analog counterparts. Editing is easy because one can access the exact discrete locations that need to be changed. Copying is simple with no loss of fidelity. A copy of digital media is identical to the original. Digital audio, image and video are easily transmitted across networked information systems. These advantages have opened up many new possibilities. Multimedia consists of Multimedia data + Set of interactions. Multimedia data is informally considered as the collection of three Ms: multisource, multitype and multiformat data. The interactions among the multimedia components consist of complex relationships without which multimedia would be a simple set of visual, audio and other data. Multimedia and multimedia communication can be globally viewed as a hierarchical system. The multimedia software and applications provide a direct interactive environment for users. When a computer requires information from remote computers or servers, multimedia information must travel through computer networks. Because the amount of information involved inthe transmission of video and audio can be substantial, the multimedia information must be compressed before it can be sent through the network in order to reduce the communication delay. Constraints, such as limited delay and jitter, are used to ensure a reasonable video and audio effect at the receiving end. Therefore, communication networks are undergoing constant improvements in order to provide for multimedia communication capabilities. LANs are used to connect local computers and other equipment, and Wide Area Networks (WANs) and the Internet connect the LANs together. Better standards are constantly being developed, in order to provide a global information superhighway across which multimedia information will travel. Organization of the Book The book is organized into six chapters: Chapter 1 describes the concept of multimedia communication modeling. It presents a brief description of elements for multimedia systems. After that, we discuss user and network requirements together with the packet transfer concept. An overview of multimedia terminals is also given. Chapter 2 explains that multimedia communication is more than simply putting together text, audio, images and video. It reviews a recent trend in multimedia research to exploit the audio-visual interaction and to build the link between audio and video processing. The emphasis is on lip reading, synchronization and tracing audio-to-visual mapping as well as the bimodal person verification. Chapter 3 is devoted to multimedia processing in communication. We present and analyze digital media and signal processing elements. Next, we describe a general framework for image copyright protection through digital watermarking. We then review the key attributes of neural processing essential to intelligent multimedia processing. Finally, this chapter concludes with recent large-scale-integration programmable processors designed for multimedia processing such as real-time compression and decompression of audio and video as well as the next generation of computer graphics. Chapter 4 deals with the issues concerning distributed multimedia systems. We give an overview: main features, resource management, networking and multimedia operating systems. Next, we identify the applications like interactive television, telecooperation and hypermedia, and we survey the important enabling technologies. Chapter 5 focuses on multimedia communication standards. We discuss Moving Pictures Experts Group (MPEG)-1, MPEG-2, MPEG-4, MPEG-4 Visual Texture Coding (VTC), Joint Photographic Experts Group (JPEG)-2000, MPEG-7, MPEG-21, International Telecommunications Union-Telecommunication Sector (ITU-T) and Internet standards. We discuss the ITU-T standardization process in multimedia communications from the video and speech coding, as well as from multimedia, multiplex and synchronization points of view (H.320, H.321, H.322, H.323, H.262, H.263, H.26L, H.221, H.222, H.223 and H.225). Chapter 6 concentrates on multimedia communication across networks. After an introduction about packet audio-video in the network environment, we discuss the concept of video transport across generic networks. Multimedia transport over ATM networks is described, too. We then move to multimedia across IP networks, including video transmission, traffic specification for MPEG video transmission on the Internet and bandwidth allocation mechanism. We present and illustrate the concepts of Internet access networks. In addition, we discuss special issues relating to multimedia across wireless networks such as wireless broadband communication for multimedia audiovisual solutions, mobile and broadcasting networks and digital TV infrastructure for interactive multimedia services. Appendix/Web Site Appendix A contains useful information available on the Internet: standardization organizations, associations, alliances, fora and consortia; documents, software and hardware reference, and a products and services list. No software is provided. The appendix can be downloaded at the following Web site: www.phptr.com/rao References The references are grouped according to the various chapters. Special efforts have been taken to make this list as up to date and exhaustive as possible. A number of forces are driving communications, such as the following: The evolution of communications and data networks in today's modern Plain Old Telephone Service (POTS) network and packet (including the Internet) networks, with major forces driving these networks into an integrated structure The increasing availability of almost unlimited bandwidth demand in the office, the home and eventually on the road, based on high-speed data modems, cable modems, hybrid fiber-mix systems, and, recently, a number of fixed wireless access systems The availability of ubiquitous access to the network through Local Area Networks (LANs), wireline and wireless networks providing the promise of anywhere, anytime access The ever-increasing amount of memory and computation brought to bear on virtually any communications or computing system The terminals, including sophisticated screen phones; digital telephones; multimedia personal computers (PCs) that handle a wide range of text, image, audio and video signals; network computers and other low-cost Internet-access terminals and Personal Digital Assistants (PDAs) of all types that can access and interact with the network using wired and wireless connections The digitalization of virtually all devices, including cameras, video capture devices, video playback devices, handwriting terminals, sound capture devices and so forth Multimedia Communication Systems provides a comprehensive coverage of various surveys of the current issues relating to multimedia communications. This book addresses the fundamentals of the major topics of the multimedia communication systems: audio-visual integration, multimedia processing in communications, distributed multimedia systems, multimedia communication standards and multimedia communications across networks. We have focused our attention on these topics with the hope that the level of discussion provided will enable an engineer or a scientist to design multimedia communication systems or to conduct research on advanced and newly emerging topics. The objective of this book is not only to familiarize the reader with multimedia communication systems, but also to provide the underlying theory, concepts and principles related to these disciplines, including the power and the practical utility of the topics. A major challenge during the preparation of this book was the rapid pace of development, both in software and hardware related to multimedia communication systems. We have tried to keep pace by including many of the latest developments. In this way, it is hoped that the book is timely and appeals to a wide audience in the engineering, scientific and technical communities. In addition, we have included more than 270 figures and more than 800 references. Although this book is primarily for graduate students, it can be also very useful for academia, researchers, scientists and engineers dealing with multimedia communication systems.

Web-Based Management of IP Networks and Systems

Abstract: From the Publisher: Presents a cutting-edge, practical solution to Web-based network management that incorporates all the latest advances in technology including IP, XML, and JavaThe solution applies equally well to IP data networks, IP multimedia networks and IP telephony networks Demonstrates the applicability of the solution using a prototype management tool: JAMAP (the JAva MAnagement Platform) Includes a comparison between the proposed solution and other well-known techniques such as SNMP (Simple Network Management Protocol)

Service observing in a voice over IP telephone system

Abstract: An information handling system comprises a TCP/IP network connecting a hub to a multimedia server and the hub to a data server, and the hub to an IP telephony device that is then coupled to a network device Data sent from the network device is addressed for transmission to the data server and is transmitted through the IP telephony device to the TCP/IP network The present invention allows a user, such as a supervisor, to monitor the audio conversations of users on the system and current display information of another station This can be done between remote systems so that the monitoring individual does not have to be in the same system as the user who is being monitored

Internet protocol telephony exchange system and call control method thereof

Abstract: An Internet Protocol telephony exchange system and a call control method thereof. The exchange system integrates an IP terminal and a legacy terminal in a single exchange system, controls a call of the IP terminal in the same manner as an extension subscriber, and contains at least one IP terminal connected to the IP network. The IP terminal contains a user interface for generating user information or converting received user interface information into information of a user-identifiable state, and performs a VoIP function in compliance with one or more of a H.323, a MGCP and an SIP protocol procedure. The IP network is connected to an IP driver and an IP-PBX (Internet Protocol-Private Branch Exchange). The IP driver controls an IP end point at which the IP terminals are positioned, upon receiving IP terminal connection information and call control information based on H.323/MGCP/SIP protocol procedure.

Multicast for mobile hosts in IP networks: progress and challenges

Abstract: In the past few years, multimedia applications have become very popular on the Internet, and a growing number of users have shown interest in this type of communications. IP multicasting has logically been considered to support such transmissions, mainly because its inherent nature is to efficiently minimize the bandwidth required to deliver multimedia data to a large set of targeted receivers. In the meantime, there has been a steady increase in the number of mobile wireless devices connected to the Internet. It has also clearly appeared that mobile Internet users will expect to have access to the services and applications available in traditional wired networks, and these services will surely include multimedia applications. Consequently, many efforts are being made to provide efficient mobility and multicasting support, and to bring the two together in the next generation of IP networks.

Deployment of IP multimedia streaming services in third-generation mobile networks

Abstract: In this article, an end-to-end quality of service framework for streaming services in 3G mobile networks is considered. Under this scenario, the interaction between UMTS and IETF's protocols and mechanisms for a streaming session is analyzed. By signaling flowcharts, it is shown that both groups of protocols and mechanisms can co-operate to provide seamless end-to-end real-time services. Specifically, the article proposes to make the IP multimedia subsystem aware of the real time streaming protocol, in order to extend its control from SIP to RTSP-based services, such as multimedia streaming services. Supported by this proposed framework, provisioning of audio streaming services over 3G mobile networks is also outlined.

IP for 3G: Networking Technologies for Mobile Communications

Abstract: From the Publisher: What is an 'all-IP' network? What difference will IP networking make to 3G services? Third Generation (3G) mobile offers access to broadband multimedia services - and in the future most of these, even voice and video, will be IP-based However 3G networks are not based on IP technologies, rather they are an evolution from existing 2G networks Much work needs to be done to IP QoS and mobility protocols and architectures for them to be able to provide the functionality 3G requires IP for 3G gives a comprehensive overview of 3G networking functionality and examines how IP protocols can be developed to provide some of the basic building blocks of a mobile system (mobility, QoS and call control) Features: Clear explanation of how 3G works at the network level Review of IP protocol and architectural principles Extensive review, classification and analysis of IP mobility protocols - macro and micro- including IPv6 Analysis of IP QoS protocols and proposed solutions for mobile networks Tutorial on SIP (Session Initiation Protocol) and how SIP can be used for multimedia session control Description of latest UMTS developments - including Release 5 Discussion of 4G networks - what does 4G mean? IP for 3G will appeal to mobile telecommunications and network engineers who want to know about future developments as well as system designers and developers Students and academics on postgraduate courses related to telecommunications, especially 3G networking or IP protocols, will find this text ideal supplementary reading, only assuming a general knowledge of GSM and general networking principles

A secure ip access protocol framework and supporting network architecture

Abstract: A protocol framework for a Secure IP Access (SIA) method, and supporting components deployed on IP hosts and IP networks. Using this method, an IP host can establish a secure data channel within an IP network over an insecure shared link while requesting IP address and networking configuration parameters from the IP network. A system administrator can implement strong access control against various attacks that an edge IP network may have to face, such as a denial-of-service attack that exhausts assignable IP addresses. This is a lightweight, scalable, and backward-compatible solution that can improve security performance for public and corporate LANs having open access such as wireless access points and Ethernet jacks.

Wireless Internet access for mobile subscribers based on the GPRS/UMTS network

Abstract: With the advent of IP technologies and the tremendous growth in data traffic, the wireless industry is evolving its core networks toward IP technology. Enabling wireless Internet access is one of the upcoming challenges for mobile radio network operators. The General Packet Radio Service is the packet-switched extension of GSM and was developed to facilitate access to IP-based services better than existing circuit-switched services provided by GSM. We illustrate how a visited mobile subscriber on a GPRS/UMTS network can access his/her home network via the gateway GPRS support node (GGSN). We also propose some implementation ideas on wireless Internet access for a remote mobile subscriber based on a GPRS/UMTS network.

Global mobility approach with Mobile IP in "All IP" networks

Abstract: The purpose of the document is to describe how the EURESCOM project P1013 FIT-MIP evaluates the use of Mobile IP in an IP core network, acting as a mobility management protocol federating heterogeneous access network technologies such as PSTN, WLAN or GPRS. The aim is to provide a wide IP environment with an always-on access to IP applications (VoIP, VPN, mobile Internet, etc.), Mobile IP functionalities enabling seamless mobility through the various networks.

System and method for wireless multimedia communication

Abstract: The present invention privides a system and method for transmitting multimedia files to wireless terminal devices (23) The multimedia files are received at multimedia message service center via a wireless link, and the multimedia message service center initiates a corresponding transmittal of one or more multimedia files to a caleed wireless terminal device When transmission failure is detected, the multimedia files are stored in a multimedia gateway memory (103) he selected wireless terminal device is notified as to a corresponding memory identifier The selected wireless terminal can retrieve the stored multimedia files by providing the memory identifier to the multimedia gateway via the Internet (131) to a wireless application protocol server via a multimedia terminal device (25)

Internet protocol (IP) multimedia subsystem (IMS) availability detection

Abstract: A method is disclosed for providing information related to an Internet Protocol (IP) Multi-Media (IM) Subsystem (IMS) to a mobile terminal. The method includes storing the information into a memory that is readable by the mobile terminal, and reading the stored information from the memory. The memory may be at least one of a USIM, an EEPROM or a RAM. In one embodiment the information is stored during a PDP context activation procedure. A wireless communications system that operates in accordance with the method is also disclosed.

Deployment of ip multimedia streaming services in third-generation mobile networks ip m ultimedia i n n ext -g eneration m obile n etworks : s ervices , p rotocols , and t echnologies

Abstract: In this article, an end-to-end quality of service framework for streaming services in 3G mobile networks is considered. Under this scenario, the interaction between UMTS and IETF’s protocols and mechanisms for a streaming session is analyzed. By signaling flowcharts, it is shown that both groups of protocols and mechanisms can co-operate to provide seamless endto-end real-time services. Specifically, the article proposes to make the IP Multimedia Subsystem aware of Real Time Streaming Protocol, in order to extend its control from SIP to RTSP-based services, such as multimedia streaming services. Supported by this proposed framework, provisioning of audio streaming services over 3G mobile networks is also outlined.

Local area and multimedia network using radio frequency transceivers and coaxial cable

Abstract: A home or business-based local area network (LAN) architecture and system has an internal LAN that combines the distribution of two or more independently sourced classes of services, such as multimedia and data or telephone or access control, to multiple users within a single building, such as a house, hotel, multiple family dwelling or business/office building. A primary data service and a secondary service which may comprise analog or digital telephone service or access control is converted to a radio frequency that is then combined with multimedia entertainment services into a single local cable television network, carrying data, and analog and digitally encoded multimedia signals and telephone service. Terminals or devices connect to the LAN by means of a wall plate which performs the necessary interfacing between a terminal and the LAN, by separating the multimedia and LAN data services and telephone by means of a radio unit which is integrated into the wall plate. Separate connections are provided for data telephone, access control and multimedia interconnection.

System and method for providing computer telephony integration over a computer network

Abstract: A computer telephony system for use with a remote multimedia computer connected to the Internet includes an automated call distribution system having a plurality of agent telephones. The automated call distribution system operates to deliver incoming telephone calls to a selected agent telephone having a corresponding agent computer. The computer telephony system further includes means for establishing a voice over IP connection between the remote multimedia computer and the selected agent telephone, means for retrieving data related to the voice over IP connection from the remote multimedia computer, and means for selectively displaying certain of the retrieved data on the selected agent computer during the established voice over IP connection. A method for linking a remote user to a live agent, the remote user operating a multimedia computer and being connected to the web server through the Internet, is also provided.

Method and apparatus for voice over IP network address translation

Abstract: An IP services switch that supports packetized voice traffic in the form of voice packets from a plurality of enterprises having a plurality of endpoints some of which can use the same IP addresses. The IP services switch includes a plurality of NAT tables, each of which corresponds to a separate enterprise network for providing header and payload IP addresses which are unique to the services switch for the voice packets corresponding to each separate enterprise endpoint. A method of NAT in an intermediate service provider network for header and payload IP addresses in VoIP voice traffic packets is also provided.

Conversational IP multimedia security

Abstract: With the introduction of 3G systems multimedia applications over wireless will become widely available to the general public. One such application will be peer-to-peer conversational multimedia communication in which voice, video, still pictures and other media can be used simultaneously and in an interactive way. However, in an all IP environment it is important to have high quality and efficient security services to protect the traffic against eavesdropping and manipulations. In particular, end-to-end security is considered attractive. This paper investigates the security requirements that emerge from conversational IP multimedia applications in heterogeneous environments, with special emphasis on the requirements stemming from the wireless access. The design and the design goals of both SRTP, a security protocol for protection of media traffic, and multimedia Internet keying (MIKEY), a key management protocol specially developed for those environments, are also described.

Wireless distribution of multimedia content

Abstract: A method for distributing multimedia content provides a wireless controller communicatively coupled to each of a multimedia source and a destination. The wireless controller is adapted to perform the steps of communicating with the multimedia source to generate a first display of a plurality of multimedia works available from the multimedia source, facilitating a selection of at least one multimedia work from the first display of the plurality of multimedia works, and upon the selection being made by a user, commanding the multimedia source to send the at least one multimedia work as the streaming multimedia data to the destination.

System and method for charging in a communication network

Abstract: The present invention relates in general to communication networks and more specifically to a system and a method for charging in a communication network, especially in an IP Multimedia network. The new charging system according to the present invention allows charging principles used in traditional telecom networks to be applied also in IP Multimedia networks.

Methods and apparatus for facilitating remote communication with an IP network

Abstract: A system, method, apparatus, means, and computer program code for facilitating communication via an IP network. According to some embodiments of the present invention, a proxy device is positioned topologically between an IP enabled communication device (e.g., an IP telephone) and an IP based network. The proxy device may establish a remote access connection to the network before or after receiving a request from the IP enabled communication device to communicate to or via the network. The proxy device then facilitates communication between the IP enabled communication device and the network. In addition, the proxy device may modify source and/or destination IP addresses in messages or other communications received from the IP enabled communication device prior to sending such messages or other communications to the network and may modify source and/or destination IP addresses in messages or other communications received from the network prior to sending such messages or other communications to the IP enabled communication device.

A qualification platform for design reuse

Abstract: The application and development of reusable components (intellectual property, IP) has become a regular part of modern design practices. The IP provider on one side and the IP integrator (user) on the other may be in the same company or separate participants in the microelectronic design market. In both cases, the transfer of IP remains a complex and time-consuming task. The qualification of IP gains a significant relevance for successful application and transfer of IP. This paper proposes an IP qualification methodology for an automated quality check that also incorporates current standards. Through embedding of the new concept into the regular design flow, IP transfer comes closer to an easy mix and match of virtual components. The presented approach has been validated during an industrial case study.

Multimedia augmented conference bridge

Abstract: The present invention provides an effective and efficient way to link multimedia sessions involving multimedia clients with a conference call involving telephony devices associated with the multimedia clients. In operation, the telephony system will recognize a call directed to an audio bridge, as well as trigger a message indicating the same. The message includes the telephony device's directory number, which is used to access an address for an associated multimedia client. The address for the multimedia client is sent to a multimedia bridge, which is associated with the audio bridge. The multimedia bridge will use the multimedia client's address to send the multimedia client the address for the multimedia bridge, addresses for other participating multimedia clients, and various types of information bearing on the multimedia aspect of the conference call.

Method and system for determining network capacity to implement voice over IP communications

Abstract: The method and system allows for predicting the capacity of a data network to have voice over IP communications implemented thereon. Information corresponding to network data transmission traffic is collected. Information corresponding to telephone call traffic on the PSTN for an organization is also collected. A determination is made about what load the telephone call traffic would impose on the network if implemented as voice over IP traffic. This is compared to the network capacity and it is determined from this comparison whether the network is capable of having conventional legacy telephone traffic implemented thereon as voice over IP.

Method and device for authenticating a subscriber for utilizing services in a wireless LAN while using an IP multimedia subsystem of a mobile radio network

Abstract: An efficient authentication is made possible by a method for authenticating a subscriber MT ( 6 ) for utilizing services in a wireless LAN (WLAN) ( 10 ) while using an IP multimedia subsystem (IMS) ( 3 ). The inventive method is characterized in that a subscriber MT ( 6 ), who is to be authenticated and who is located at a location having WLAN coverage, receives an IP address from the WLAN ( 10 ) in an attributed manner, after which the subscriber authenticates himself with regard to the IP multimedia subsystem ( 3 ) while giving this IP address. In addition, an element ((WAGW ( 2 )) of the WLAN ( 10 ) is informed of the result of the authentication of the subscriber MT ( 6 ) with regard to the IMS ( 3 ).

Service control architecture in the UMTS IP multimedia core network subsystem

Abstract: The 3 rd Generation Partnership Project (3GPP)'s UMTS networks promise to deliver an abundance of advanced, innovative, and feature-rich applications to end-users in a 3 rd Generation (3G) wireless environment. An IP Multimedia core network Subsystem is being introduced as part of this 3G wireless environment which aims to enable the convergence of, and access to, voice, video, messaging, data and web-based technologies for the wireless user. The goal is to combine the growth of the Internet with the growth in mobile communications. The service control architecture for the IMS can be summarised as consisting of an Application Server, providing the execution environment for the applications, and communicating with the Call State Control Function that handles the session control and mobility management functionality. Three general sets of standardised platforms for service control are being introduced in the UMTS' IMS, each one addressing particular needs, from legacy service support to light weight SIP based support. This paper aims to provide an overview of the IMS service control architecture focusing on the rational of the decisions taken in 3GPP.

Management of Multimedia on the Internet

Abstract: This paper summarizes the research work that has been conducted in the context of the RTIPA project on policy-based QoS (Quality of Service) and security management for distributed multimedia services. It presents an architecture allowing the derivation of policies from the service level down to the network level. It is a step towards an end-to-end QoS and security management for distributed multimedia services running on the new generation of IP networks.