Showing papers on "IP Multimedia Subsystem published in 2000"

IP-based access network infrastructure for next-generation wireless data networks

Abstract: Next-generation wireless network standards are currently being defined. The access network architectures have several specialized components tailored for their respective wireless link technologies, even though the services provided by these different wireless networks are fairly similar. We propose a homogeneous IP-based network as a common access network for the different wireless technologies. The IP-based access network uses the Internet standard, Mobile IP, to support macro-mobility of mobile hosts, and HAWAII to support micro-mobility and paging functionality of current wireless networks. We also illustrate how the proposed IP-based solution can interwork with existing infrastructure so that deployment can be incremental.

Broadband cable telephony network architecture IP ITN network architecture reference model

Abstract: The present invention provides a system and method for a reliable, low-cost, secure Internet Protocol (IP) based network that provides broadband-based voice communications as well as video and data communications. The IP network is arranged to function with the infrastructure of the Public Switched Telephone Network (PSTN), to control telephone calls in SS7 type networks and to provide the features, applications, and services of the typical SS7 networks in a voice over IP network. The present invention supports much larger cost effective call volumes than the present network systems, allows accommodation of a wide range of broadband-based service platforms, provides flexibility to support current and future calling feature services, and provides high quality voice transmission.

DRiVE-ing to the Internet: Dynamic Radio for IP services in Vehicular Environments

Abstract: The European Union funded DRiVE project (Dynamic Radio for IP Services in Vehicular Environments) aims at enabling spectrum-efficient high-quality wireless IP communication in a heterogeneous multi-radio environment to deliver in-vehicle multimedia services. Key issues are spectrum efficiency and dynamic spectrum allocation within different radio networks, the IPv6 based network infrastructure with inter-working of cellular and broadcast radio networks, as well as adaptive services for the vehicular environment with a high degree of mobility. The paper gives a general overview of the DRiVE project and focuses on the network architecture for IP over multi-radio access networks and traffic control aspects within the emerging "DRiVE" network.

Method and device for integrated multimedia messaging service

Abstract: A multimedia messaging service is provided for use in a powerful, facilities-based, end-to-end Internet Protocol (IP) based network infrastructure that guarantees voice, data and video communication reliability and security to users for an integrated telephone, television and data network. The IP network multimedia messaging service provides an any-media messaging service to its users. The IP network user may send and receive mail messages in a variety of formats such as e-mail (text), voice mail (audio), or multimedia video mail (audio and video). A Graphical User Interface (GUI) is provided as one means for retrieving a user's stored mail messages. The GUI provides the user with a single means for identifying and accessing all the various types of mail messages which are stored and awaiting review; whether the mail message is in e-mail, voice-mail, or multimedia video mail format. Further, the system may provide the user control of the type of media by which the stored mail messages are to be retrieved and reviewed, regardless of the type of media used to create and store the message. For example, if a user has an e-mail message they can instruct the IP network multimedia message service to transform the text of the e-mail message into an audio message using voice synthesis. Similarly, if a user has an audio voice-mail message the system can transform the audio into a text (e-mail) message using voice recognition. The multimedia messaging service of the present invention may also enable a user to sort and/or prioritize mail messages based on a variety of user specified criteria such as the senders identity, subject matter, date sent, priority specified by the sender, etc. The multimedia messaging service may include a multimedia message forwarding feature which enables the user to specify a remote location to which message waiting notification will be automatically forward and from which the user may instantaneously review the message in whatever media the user selects. The multimedia messaging service may enable the user to store the messages on their own equipment, e.g., within a PC or a Broadband Residential Gateway (BRG), or to archive the message within the system for a fee. The multimedia messaging service may also be equipped with a simple user friendly message waiting indicator for each IP address and a one touch multimedia messaging service message retrieval feature activation.

A method for serving ip users by graphically-based interaction to agents of a call center

Abstract: Method and apparatus for connecting Internet or IP users to agents of a call center, which may be linked to an Internet web site. Visual information about quality of service, available agents, and history of previous connections, is transferred to the IP user via the IP network prior to voice call establishment, and a voice call is established according to inputs from the IP user which are responsive to the transferred information. An IP user who accesses a web site is identified and initiates a session with the serving call-center. Agent status information is stored at the call-center database. Information about the status and skills of each agent, which is stored at a database, is sent over the IP network and displayed on the screen of the IP user. A first selection menu is displayed on the screen and the IP user is requested to select between waiting for a preferred agent or sending voice or text messages. Available agents are displayed on the first menu, as well as their queuing time. If the IP user selects to wait, a second selection menu is displayed, thereby offering the IP user to continue to queue, or to queue for another agent, or to leave a voice message which may be delivered to the agent via voice mail. The IP user may send a text message which is displayed on the agent's display. After making all the desired selections and knowing the queuing time, a Voice-over-IP call between the IP user and the call-center may be established. The details of the connection between each IP user and his preferred agent during the current session are stored in a database.

Quality of service in IP networks: foundations for a multi-service Internet

Abstract: Quality of Service is a fast growing area of technology, being driven by the growth of real-time applications such as voice over IP. This book is perfect for you, technical professionals who are looking for information building blocks of Quality of Service and who want to grasp critical concepts such as the DiffServ and IntServ models and the use of MPLS to support the next generation of VPNs. If you are a Network architect, network engineer, or network designer, you will be using the authoritative guide to understand the different emerging technologies that can be used to archive Quality of Service, and to decide how to incorporate them into your networks and meet the needs of your particular network environment. Quality of Service in IP Networks presents a great deal of technical detail, as well as provides a clear understanding of the architectural issues surrounding delivering QoS in an IP network, and its positions in the emerging technologies within a framework of solutions.

The PINT Service Protocol: Extensions to SIP and SDP for IP Access to Telephone Call Services

Abstract: This document contains the specification of the PINT Service Protocol 1.0, which defines a protocol for invoking certain telephone services from an IP network. These services include placing basic calls, sending and receiving faxes, and receiving content over the telephone. The protocol is specified as a set of enhancements and additions to the SIP 2.0 and SDP protocols.

Smart Delivery of Multimedia Content for Wireless Applications

Abstract: Packet-oriented access to cellular networks enables us to deliver multimedia content to mobile users. As cellular networks will continue to deliver circuit switched voice for some time to come, care must be taken to avoid interference between these delivery mechanisms, while maximizing the range of services and the number of users. Smart delivery of multimedia content involving agents running in the mobile, the base station and the content provider allows us to dynamically adapt the application and network behavior to each other in order to meet the criteria for specific applications. In particular, this paper examines the delivery of streaming media and interactive voice as Voice over IP (VoIP) to mobile users. Our conclusion is that this, in combination with the dynamic adaptive properties as introduced by the agents, enables us to transfer voice entirely IP over wireless links, thereby freeing further resources for the new applications that we refer to in this paper.

Computer network telephony

Abstract: There is provided method and apparatus for connecting computer network ip telephones using a speech recognition engine and a ip address database on an INTERNET server, The method comprises opening a voice channel from an ip phones to a speech recognition server; determining the name of the addressee from a speech input sent over the voice channel to the speech recognition server by the caller; determining an ip address from an ip address database corresponding to the determined addressee's name; opening a data channel from the database and transmitting the ip address to one or other of said telephones; and routing logic on said one or other ip phones using the ip address to establish a connection with the other ip phone. This allows the ip phones to access remote resources of speech recognition and a large database thereby taking advantage of more powerful resources that would be available locally.

Quality of Service in IP Networks

Abstract: Process for imparting improved wrinkle-recovery and crease-retention characteristics, frequently referred to as durable press or wash-and-wear characteristics, to textile fabrics containing at least some reactive fibers usually natural fibers such as cellulosic or regenerated cellulose fibers, by cross-linking such fibers in delayed-cure or conventional procedures. Either the resin or other cross-linking material or materials or the catalyst, when a catalyst is used, may be encapsulated in microcapsules. Alternatively, both the cross-linking material or materials and the catalyst are thus encapsulated. The capsules are applied to the fabric, before or after or simultaneously with the application of such unencapsulated materials as may be used, to sensitize the fabric for subsequent cross-linking operation. Cross-linking is effecting when desired usually by application of heat and/or pressure to the sensitized fabric, to release the encapsulated materials and to complete the reaction.

Broadband cable IP telephony network architecture

Abstract: The present invention provides a system and method for a reliable, low-cost, secure Internet Protocol (IP) based network that provides broadband-based voice communications as well as video and data communications. The IP network is arranged to function with the infrastructure of the Public Switched Telephone Network (PSTN), to control telephone calls in SS7 type networks and to provide the features, applications, and services of the typical SS7 networks in a voice over IP network. The present invention supports much larger cost effective call volumes than the present network systems, allows accommodation of a wide range of broadband-based service platforms, provides flexibility to support current and future calling feature services, and provides high quality voice transmission.

System and method for supporting conferencing capabilities over packet-switched networks

Abstract: An IP telephone which supports a voice conference call with a plurality of other IP telephones over a packet-switched network is disclosed. The IP telephone exchanges audio and signaling messages with the other IP devices during the conference call, and thereby allows three or more conference call participants to talk together over the packet-switched network. The IP telephone includes a memory, which stores a conferencing module and a channel establishment module, and a mixing module for mixing input signals received at the IP telephone to produce a combined signal output. When played back, the combined signal output to allows the user to hear what was said by the other conference call participants.

An Internet infrastructure for cellular CDMA networks using mobile IP

Abstract: The CDMA community, under the umbrella of the 3rd Generation Partnership Project 2, has embarked on a standardization effort for wireless data based on mobile IP. Important issues addressed include the link layer interface to a mobile IP foreign agent; how link-layer mobility interacts with IP-layer mobility; how virtual private network services will be supported; and how to provide authentication, authorization, and accounting in a cellular mobile IP environment. Members of 3GPP2 are also active in the Internet Engineering Task Force's mobile IP, ROAMOPS, and AAA working groups. Based on our experiences in this effort, this article gives an overview of the issues we have encountered in standardizing a mobile IP-based network architecture in a cellular telephony environment, including current points of contention, and gives a summary of the current state of the standards.

Method and apparatus for interfacing a public switched telephone network and an internet protocol network for multi-media communication

Abstract: A real-time interface between the public switched telephone network (PSTN) and an Internet Protocol (IP) network provides voice to data and data to voice conversion between the PSTN and the IP network in a seamless process. The interface, a central communication network, performs Class 5 switching between the PSTN and the IP network, besides providing enhanced services. Receiving a call, the central communication network simultaneously routes the call to a plurality of preprogrammed numbers on the PSTN and on the IP network. The central communication network provides call screening, takes voice messages and converts them to e-mail messages, takes e-mail or facsimile messages and converts them to voice messages. Communication between a PSTN phone on a local PSTN, a computer hooked up to the IP network, a phone hooked up to the IP network by a gateway, a private branch exchange (PBX) on a local PSTN, a wireless communication system with pagers and/or cell phones hooked up to a local PSTN, and facsimile machines on a local PSTN, for example, is provided by the central communication network. Through the central communication network, a computer hooked up to the IP network can exchange voice messages and facsimile messages with a PSTN connected device and conduct conference calling with a plurality of PSTN devices.

Transmission of multimedia messages between mobile station terminals

Abstract: A method and a system for transmitting messages containing multimedia information or content that enables transmission and communication of multimedia messages between subscribers connected to telecommunication systems of different system operators. The inventive system includes a first mobile station terminal from which a multimedia message is sent, a second mobile station terminal that is the intended recipient of the multimedia message, a digital mobile network, a first multimedia message server for receiving a multimedia message from the first mobile station terminal, a first address database associated with the first multimedia message server, a second multimedia message server for receiving the multimedia message from the first multimedia message server, an IP network for carrying communications between the first and second multimedia message servers, and a second address database associated with the second multimedia message server.

IP based enhanced data casting services over radio broadcast networks

Abstract: Emerging technologies like ATM, WDM or xDSL enable broadband communication over wireline networks. Mobile data systems like GSM or even UMTS are lacking in bandwidth for broadband multimedia. Furthermore, the emergence of Internet information systems like the WWW increases the desire for broadband multimedia information and communication services and also for wireless, i.e. mobile users. The system architecture, which is described, enables the realization of broadband multimedia information services for mobile users. The basic idea for the wireless provision of multimedia services to the users is the usage of digital radio and television broadcast networks like DVB-T (Digital Video Broadcast-Terrestrial) or DAB (Digital Audio Broadcast). Though these networks only support unidirectional data casting, they provide sufficient bandwidth for multimedia information services with a large number of users. An interaction channel for upstream communication to request information is integrated in the system using different approaches with GSM data services. The system architecture is structured in components with standardized interfaces to be flexible in regard of the realization of a specific service. The Internet protocol (IP) is the basic means of interconnection for our system to form a flexible multiservice network. The system architecture has already been implemented in a prototype information service system, which enables WWW access over DVB-T and is on its way to becoming a product.

IP protection and restoration

Abstract: Protection and restoration together connote an additional layer of reliability, availability and integrity wherever they are applied. Protection ensures that the desired service will not be permanently disrupted in the event of a component failure. Restoration ensures the desired service will be returned following a component failure. For many years, IP has provided a form of protection and restoration by enabling packets to be dynamically rerouted around link or node failures. Coupled with TCP's reliable transport service, it is easy to see how TCP/IP based networking has achieved a reputation for robustness. The temporal dimension to this IP rerouting mechanism could, however, limit its usefulness for applications with real-time service-level requirements. It takes an IP network some time (usually tens of seconds) to detect a failure, propagate the information to other routers around the network, and then have each router compute a new path. The paper considers how efforts are under way in the research and vendor communities to develop faster and more robust protection and restoration mechanisms for IP networks.

Mobile multimedia platforms

Abstract: With the explosion in mobile telecommunications and increasing competition, mobile telephone service providers and vehicle makers are looking to develop new types of services for vehicle users. So far the services have included information about traffic conditions and support in case of breakdowns. In future digital broadcast and third generation telecommunication systems will be used to deliver interactive multimedia services into the vehicle. This paper looks at platform requirements for supporting the delivery of the new multimedia services. It considers the role of operating systems and networks in determining the flexibility and costs of the system.

QFT-based robust/fault-tolerant flight control design for a remote pilotless vehicle

Abstract: The following topics were dealt with: mobile multimedia applications guaranteed service resource allocation; Web search for general and scientific information access; Internet online databases and infocash concept; scalable open-architecture media server; ATM to IP European trials; programmable router IP services creation; Russian academic and research networks remote collaboration services; SMARTS-information support for Russian SMES in information society technologies; advanced packet switching network arrival processes characteristics estimation; ATM networks path delay reduction, multicasting performance evaluation; reliable multicast using IP/CMP protocol; multiservice networks threshold based admission control; speech processing and IP-telephony human perception statistical model; scientific library; library catalogues Internet representation; mobile IP and security; wireless Internet over LMDS; Russian Internet information search; YANDEX.RU search and research engine

Ip library management system

Abstract: An IP library management system includes IP data segregated into two separate databases: an IP database for storing virtual component data, and an IP catalog database for storing attributes pertaining to the stored virtual component data The IP database and IP catalog database are connected over a local area network An IP database file server acts as the intermediary between the IP database and the local area network, while one or more database servers act as the intermediary between the IP catalog database and the local area network The local area network may be connected to a wide area network allowing remote access by a number of remote users The IP library management system provides an IP authoring methodology and an IP integration methodology associated with the two databases Users may access the IP library management system through a global computer network such as the Internet

Multimedia processing system architecture

Abstract: A multimedia processing system architecture performs a plurality of multimedia tasks on multimedia data using a plurality of multimedia processing blocks, at least one communication bus to carry the flow of multimedia data between the multimedia processing blocks. An application interface manages the multimedia processing blocks. For each multimedia task, the application interface creates a subset of multimedia processing blocks to be assembled in order to run the multimedia task. In this architecture, each multimedia processing block comprises at least one input interface to connect it in receive mode to a communication bus and/or at least one output interface to connect it in send mode to a communication bus. To create a subset of multimedia processing blocks, the application interface selects multimedia processing blocks to form the subset, and then examines the input and output interfaces of the selected multimedia processing blocks in order to check whether all the multimedia data exchanges to perform the multimedia task are possible within the subset and determine, for these exchanges, the encoding format of the multimedia data to be exchanged and the communication buses to be used to connect the different multimedia processing blocks of the subset in pairs according to the complementarity of the ports of their respective input interface and output interface.

Packet voice telephony apparatus and method

Abstract: According to the present disclosure, connectionless base IP protocol is leveraged to transfer streaming voice to a destination telephony device. As such, the disclosed IP telephony peripheral adjunct to a computer includes an interface to the computer, a controller and memory specifying the destination IP address, a packetizer coupled to the controller and memory for packetizing outbound digitized voice into at least one outbound IP packet, and a network interface for transmitting the outbound IP network onto a network which may involve a LAN, WAN or the Internet. The disclosed IP phone peripheral also includes an extractor coupled to the memory and controller for extracting inbound digitized voice within an incoming IP packet whose source address correlates to the destination IP address or addresses stored in the memory.

VoIP mobility in IP/cellular network internetworking

Abstract: This article explores VoIP mobility in the context of IP and cellular networks interworking. ITU-T Rec. H.323 gateways provide the interconnection between IP networks and switched circuit networks. They allow a call originating from an SCN phone to be transmitted over an IP network to an H.323 terminal, or bridged to another SCN phone. While H.323 provides interoperability with other SCN terminals, the major efforts have been focused on IP/wired SCN (PSTN, ISDN, etc.) interworking. In this article we discuss the challenges associated with the interworking between IP networks and cellular networks through H.323 gateways, and propose an innovative approach using the existing call transfer supplementary service to provide VoIP mobility in the H.323 IP telephony networks. The proposed approach uses existing components in the H.323 standard, thereby allowing VoIP mobility service in hybrid IP/cellular networks to be a value-added feature in the existing H.323-compliant Internet telephony systems.

Integrated management architecture for IP-based networks

Abstract: IP telephony will bring about a dramatic change in the way IP services are planned, provisioned, managed, and billed. In order to build and retain a strong customer base for these new services, service providers need to meet, if not exceed, the customer expectations set by today's traditional voice services. Acceptance of IP telephony will depend on the quality and efficiency with which service providers offer, deliver, and manage IP services. Installation, configuration, and activation must be rapid and error-free. Furthermore, customers will want direct control over the reconfiguration of services and real-time visibility into the impact change has on their operating costs. Once the service is activated, customers will want the provider to guarantee service quality as defined by industry standards. Corporate customers in particular will need to be assured that the provider is proactively monitoring performance to avoid problems and providing them visibility into the performance data collected. This article discusses an integrated management support system for IP-based networks illustrating the functions needed to support the unique challenges of managing VoIP services. An example of a service management system is also described.

Method and apparatus for conducting mobile communication over IP networks

Abstract: A method and apparatus for permitting mobile communications between a Mobile Services Switching Center (MSC) and a Mobile Station (MS) and between MSs by establishing for each transaction, including a call, an Internet Protocol (IP) connection in an IP network. In the invention a call to a MS is initiated by sending from the MSC to the MS, via the IP network, a call initiation message causing the MS to send a response message which includes a mobile identity that can be used as a session identifier identifying the MS. Responsive to the response message, the MSC sends a call set up message to establish an IP connection in the IP network upon which a transaction including the call is to be conducted. The call set up message includes a transaction ID which identifies the transaction. The IP network stores the transaction ID and maps the transaction ID with respect to the session identifier and the IP connection to be established. The IP connection is established in the IP network according to data stored and mapped in the IP network. Another call to the MS from another MS, while the previous call is active, is handled by establishing another IP connection and mapping a different value for the transaction ID for the other call for at least a second leg of the other IP connection to avoid clashes with the previously mapped transaction ID.

Call control scenarios in the "all-IP" UMTS core network

Abstract: This paper gives an overview of the 3GPP "all IP" architecture for the core network of UMTS. It presents some call control and network resource allocation scenarios using SIP for multimedia call management in a packet-switched network, UMTS/GPRS network and multimedia IP-based networks.

Resource management issues in future wireless multimedia networks

Abstract: Broadband multimedia services and wireless services are becoming very popular. They are presently the two major drivers in the telecommunication industry. It is expected that wireless mobile users' demands for multimedia mobile services will rapidly increase in the future. The paper starts by presenting the evolution of wireless networks to support future integrated multimedia wireless personal services and highlight the need for efficient resource management. The limited resources in wireless systems, such as spectrum resource and transmitter power also stress the need for efficient resource management. Emphasis is given in the paper to the discussion of the channel allocation, mobility management, and bandwidth distribution problems. A review of some approaches proposed in the literature to solve these problems is presented. Finally, the paper discusses some of the key resource management issues that need to be addressed in the context of future wireless mobile networks that support multimedia communications while ensuring quality of service guarantees.

Method of activating an inactive terminal of a data network, particularly of an IP network

Abstract: The invention relates to a method of establishing a voice call between a calling party's terminal ( 5 ), which is connected to a telephone network ( 4 ), and a called party's terminal ( 6 ), which is also connected to the telephone network ( 4 ), through an Internet Protocol (IP) network ( 1 ). To make the method as simple as possible, it is proposed to use conventional IP servers ( 2; 3 ) of IP service providers for providing access to the IP network ( 1 ). The IP network ( 1 ) includes at least one Voice-over-IP (VoIP) server ( 11 ), which controls the functions of telephony over the IP network ( 1 ). The VoIP server ( 11 ) receives the request for an IP call from the calling party, activates the still inactive terminal ( 6 ) of the called party over the telephone network ( 4 ), determines the IP addresses of the terminals ( 5, 6 ), and communicates the IP addresses to the respective other terminal ( 5; 6 ). The terminals ( 5, 6 ) then establish a voice call between them through the IP network ( 1 ).

Integrating global wireless systems with IP

Abstract: We propose several algorithms for total IP based wireless networks. This includes any cellular system from TDMA, GSM to CDMA. Solutions for associated improvements come with the new architecture are also discussed. One area is the IP internetworking among different cellular systems (GSM to GSM, GSM to CDMA, TDMA to GSM). First, an easy and fast mean of deploying a total wireless IP network (including backhaul and core) is presented. Our solution is technology independent (TDMA, GSM, CDMA) and has minimum impact on the existing network. With this proposal, the signaling is done through existing PLMN and limited IP based standard protocols. This is a pure packet based network and can support both data and voice. The mapping of PLMN and IP based addressing is through HLR to translate phone number based address (MIN) to IP based address. The PLMN provides services as ISP to support dynamic IP. For VPN application, the HLR and HLR can do the first level authentication. The e2e authentication is carried out between the mobile terminal and server. Second, the wireless vocoding based IP vocoder standards are discussed to further integrate the wireless with the IP network. Third, the solution for IP interworking of single technology global markets (European GSM) are presented. Fourth, the solution for IP interworking of multiple technologies global markets are presented. Fifth, the one step vocoding conversion for inter-system (GSM to/from CDMA) is discussed.

Real-time multimedia services over Internet

Abstract: This paper is concerned with the study of communication protocols and coding techniques required in the conception of tools supporting real-time multimedia transport on the Internet. To run multimedia over the Internet, several issues must be addressed. First, most multimedia applications require real-time traffic. Audio and video data must be played back continuously at the same rate as when generated. Second, multimedia traffic is extremely dense and heavy. To overcome these problems, we use the RTP protocol to support transmission of real-time data over IP and we choose MPEG-4 video coding. This coding technique provides a very low bit rate for multimedia applications. We show that by using RTP and MPEG-4, we obtain a high video quality that remains acceptable when the bandwidth decreases to 56 kbps. A multimedia transmission tool developed in our laboratory and allowing real-time video-on-demand transmission and TV in live multicast on the Internet are presented. Another advantage of the multimedia application is the ability to support multicast.