WO2002037813A1 - Systeme et procede permettant d'annoncer des messages a des usagers du telephone dans un reseau de telecommunications - Google Patents

Systeme et procede permettant d'annoncer des messages a des usagers du telephone dans un reseau de telecommunications Download PDF

Info

Publication number
WO2002037813A1
WO2002037813A1 PCT/SE2001/002304 SE0102304W WO0237813A1 WO 2002037813 A1 WO2002037813 A1 WO 2002037813A1 SE 0102304 W SE0102304 W SE 0102304W WO 0237813 A1 WO0237813 A1 WO 0237813A1
Authority
WO
WIPO (PCT)
Prior art keywords
message
server
client
messages
memory
Prior art date
Application number
PCT/SE2001/002304
Other languages
English (en)
Inventor
Peter Larsson
Patrik Wiss
Ulf Ekstedt
Lars-Göran Petersen
Original Assignee
Telefonaktiebolaget Lm Ericsson (Publ)
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Telefonaktiebolaget Lm Ericsson (Publ) filed Critical Telefonaktiebolaget Lm Ericsson (Publ)
Priority to AU2001296181A priority Critical patent/AU2001296181A1/en
Publication of WO2002037813A1 publication Critical patent/WO2002037813A1/fr

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M3/00—Automatic or semi-automatic exchanges
    • H04M3/42—Systems providing special services or facilities to subscribers
    • H04M3/487—Arrangements for providing information services, e.g. recorded voice services or time announcements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M3/00—Automatic or semi-automatic exchanges
    • H04M3/42—Systems providing special services or facilities to subscribers
    • H04M3/487—Arrangements for providing information services, e.g. recorded voice services or time announcements
    • H04M3/4872—Non-interactive information services
    • H04M3/4874—Intercept announcements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M7/00—Arrangements for interconnection between switching centres
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M7/00—Arrangements for interconnection between switching centres
    • H04M7/12—Arrangements for interconnection between switching centres for working between exchanges having different types of switching equipment, e.g. power-driven and step by step or decimal and non-decimal

Definitions

  • This invention relates to a system for announcing messages to telephone users in a telecommunications network (e.g., in a cellular telecommunications network or any other type of suitable network).
  • a telecommunications network e.g., in a cellular telecommunications network or any other type of suitable network.
  • Messages can be either standard messages or concatenated messages made up from several submessages joined together. Message announcements may be utilized in conjunction with DTMF receivers in voice prompting applications, or in other suitable applications.
  • PCM coded speech messages are often used and are typically stored on hard disks. Because a large number of such messages typically has to be stored, combined with required access times of hard disks and cost-related factors regarding the same, efficient distribution of such messages to end users is often lacking.
  • a message announcement system and/or method is provided in a client(s)-server structure.
  • a plurality of messages, or message portions, are stored in a memory of an announcement/message server, which in preferred embodiments may be a shared resource in a node of the network.
  • the server is capable of serving multiple announcement/message clients. Appropriate messages are distributed from the server to various announcement clients throughout the system.
  • An exemplary message may be, for example, "The number 123 4567890 has been disconnected" or "The number you are trying to reach xxx yyy zzzz, is out of service.”
  • Each announcement client preferably includes a certain amount of memory for buffering messages or message portions received from the announcement server, so that the client can send complete messages or portions of messages to end users (i.e., phone users) in the desired format (e.g., PCM (Pulse Code Modulation) voice) and/or at an appropriate rate (e.g., in approximately real time in an asynchronous system).
  • end users i.e., phone users
  • PCM Pulse Code Modulation
  • announcement clients are capable of converting a message or message portion received from the announcement server in a first format (e.g., text, voice, video clips, pictures, or any combination thereof) into a second format such as a synthetic voice format to be thereafter distributed to appropriate user(s).
  • a first format e.g., text, voice, video clips, pictures, or any combination thereof
  • a second format such as a synthetic voice format to be thereafter distributed to appropriate user(s).
  • Switch(es) and interface(s) are provided so that respective clients may distribute messages to different end users throughout the network.
  • the announcement server along with a plurality of announcement clients may be provided at a single node of a network.
  • certain announcement clients may be provided at different nodes of the network than the node at which the announcement server(s) is located.
  • certain interfaces (I/F) between the switch (e.g., ATM switch or IP router) and eventual end users may include sufficient memory for enabling the message distribution system/method herein to be asynchronous in nature up until the interface(s) and synchronous thereafter.
  • message streams sent from the announcement server can be processed in an asynchronous manner by the client(s) and/or switch(es), and can be connected to a synchronous system (e.g., an exchange in the PSTN) via the interface(es) (I/F) which is/are provided at the edge of the message distribution system of this invention.
  • announcement clients may be implemented together with other speech processing devices on speech processing boards where hard disks typically are not provided.
  • the announcement server(s) with hard disk memory can be placed anywhere in the network. Accordingly, the actual place where a message is executed (e.g., at the client location) can be moved closer to the eventual receiving end user so as to reduce costs, reduce the potential for delay, and/or provide more efficient message distribution.
  • Figure 1 is a schematic/block diagram of a first embodiment of this invention.
  • Figure 2 is a schematic/block diagram of an embodiment of this invention similar to that shown in Figure 1, except that asynchronous as well as synchronous domains are illustrated in the message distribution system of the invention.
  • Figure 3 is a diagram of an exemplary network in which the instant invention of either Figure 1 or Figure 2 may be implemented.
  • Figure 4 is a schematic functional diagram of the UTRAN of Figure 3.
  • Figure 5 is a schematic functional diagram of an MGW (media gateway) node of Figure 3 at which an announcement server and several announcement clients of the instant invention may be located.
  • Figure 6 is a functional block diagram of the MSB processing board of Figure 5.
  • FIG. 1 is functional diagram of an embodiment of this invention.
  • An exemplary use of this invention is to send a message to an end user or subscriber on the PSTN (Public Switched Telephone Network) if a particular mobile station (MS) which the end user is attempting to contact or reach is out of service or cannot be reached.
  • PSTN Public Switched Telephone Network
  • this invention may be utilized to send a message to a mobile phone user if another phone (fixed or mobile) or pager the user is attempting to reach is out of service or disconnected.
  • An exemplary message in this regard could be "The user cannot be reached", or "The number xxx yyy zzzz is out of service", or "The number xxx yyy zzzz has been disconnected, the new number is aaa bbb cccc.”
  • ,0 messages may also be sent.
  • messages according to this invention may be sent in the context of any suitable intelligent network service (i.e., the invention is not limited to a cellular telecommunications network).
  • the system of 25 this invention may send appropriate messages regarding the same to the user upon implementation of DTMF prompts.
  • the instant invention may be used in the context of a mobile or cellular telecommunications network, or alternatively in the context of other suitable intelligent network applications.
  • the message announcement system 1 illustrated in Figure 1 includes processing board 3, announcement/message server 7, server memory 5 (e.g., hard disk), non-realtime transport 9 such at the Internet or any other suitable packet or cell switched network, a plurality of message or announcement clients 11 operatively associated with one or more digital signal processors (DSPs) 13, switch 15 (e.g., ATM switch, real-time router, etc.), and interfaces (I/F) 17 for enabling messages to be sent from clients 11 to respective telephone users 19.
  • DSPs digital signal processors
  • switch 15 e.g., ATM switch, real-time router, etc.
  • interfaces (I/F) 17 for enabling messages to be sent from clients 11 to respective telephone users 19.
  • one or more of the following interfaces (I/F) 17 may be provided: IP interface, ATM interface, TDM interface, Ethernet interface.
  • Messages may thus be delivered to end users 19 via various protocols and/or networks.
  • Connection handler 16 preferably controls the connection chain so that the client need not request the server to send
  • Announcement server 7 and memory 5 are preferably located on processing board 3 at a node of the network.
  • Memory 5 functions to store a plurality of messages and/or message portions that are retrievable by server 7.
  • Server 7 and/or memory 5 is/are preferably a shared resource(s) in the node or network where it is located (i.e., server 7 functions in the context of the instant messaging invention, as well as for performing other server-related duties/tasks).
  • Transport layer 9 may be, for example, a non-real-time (nrt) transport protocol (e.g., TCP/IP, ATM/AAL5, etc.) so that communications between server 7 and respective clients 11 are handled in a non- real-time manner.
  • Nrt non-real-time
  • Announcement/message clients 11 are preferably operatively associated with corresponding processors 13.
  • clients 11 are simple in form and comprise a small amount of memory 10 (e.g., a few seconds of speech memory).
  • Clients 11 buffer messages and/or message portions received from server 7, and send the resulting messages to appropriate end user(s) 19 in the expected or desired format (e.g., voice/speech format) and/or at the appropriate rate.
  • the connection handler In order to retrieve a particular message from server 7, the connection handler first makes an appropriate request for such a message. Thereafter, server 7 retrieves at least a portion of the desired message from memory 5 (preferably the entire message). Server 7 forwards a first portion of the message to a memory/buffer 10 of the client 11. The client 11 then begins to transmit or forward the first message portion to the appropriate user 19 via switch 15 and interface 17.
  • the client 11 sends another request to server 7 for an additional portion(s) of the message. For purposes of example only, this may be carried out in a TCP/IP system by the protocol.
  • the server 7 forwards a second portion of the message to the client 11 via transport layer 9. This process continues until the entire message has been received by the client 11 from the server, and played out to the appropriate end user(s).
  • clients 11 send continuous requests to server 7 as message portions in their memories 10 are output in the appropriate format, until a client has received the entire message from the server that it desires to play out.
  • Such requests from the client are sent to the server "just in time” when client memories or speech buffers 10 are reduced to a certain threshold.
  • Memory 10 at each client preferably has a capacity less than that needed to store entireties of certain messages to be played out to end users.
  • clients 11 can output complete messages to users 19 in an expected format and/or at an appropriate rate (e.g., approximately real time) while only utilizing a small amount of memory which may or may not be capable of storing an entire message.
  • the client is also capable of connecting the message or message portion to another format.
  • a client 11 desires to send the following message to a user 19 of a mobile phone: "Sorry, the mobile phone which you are attempting to reach is out of service.”
  • the connection handler sends a request to server 7 requesting the identified message.
  • Server 7 retrieves at least a portion of this message from memory 5, and initially sends the following first portion of the message to the client: "Sorry, the mobile phone which you are attempting to reach”.
  • This initial message portion is received by the client 11 and stored in its memory 10.
  • the client then begins to play out this initial portion of the message in approximately real time, via switch 15 and an interface 17 to an end user 19. While playing out this initial message portion, the client's memory 10 content is reduced below a particular threshold at which time the client sends another request to the server 7 asking for the remaining portion(s)
  • server 7 then sends the following second portion of the message to the client 11 : "is out of service”.
  • Client 11 receives this second portion of the message before the initial portion of the message has been entirely played out to the user (if not received, the client 11 may send out silence).
  • the second portion of the message is stored in the client's memory/buffer 10 and played out
  • clients 11 can be implemented together with other speech processing devices on generic speech processing boards where hard disks normally are not provided (e.g., exemplary "other speech processing devices" include speech coder, echo canceler, circuit switched data application(s) providing modem functionality towards PSTN and/or ISDN, tone sending/receiving, and/or DTMF
  • connection handler(s) to potentially utilize such speech processing devices in an efficient manner in order to help implement certain aspects of this invention (e.g., messages to be sent out to end users 19 may be determined by clients 11 in response to received DTMF tones initiated by end users).
  • the instant invention enables announcement/message server 7 to be placed anywhere in the
  • non-realtime communications between server 7 and clients 11 can be of the low quality of service (QoS) type, with higher quality of service communications (e.g., real-time message distribution) being carried out only from clients 11 or interfaces to respective users 19.
  • QoS quality of service
  • clients 11 can be positioned closer to users 19, so that much of the
  • server 7 may be located at the same node as one or more clients 11. However, in alternative embodiments of this invention, server 7 may be located at a node different from a node at which one or more clients 11 is/are located. Such alternative embodiments of this invention enable messages and/or message portions to be stored at a centralized location where they are accessible and
  • 5 may be played out by different clients at different nodes throughout the network.
  • Communications between server 7 and respective clients 11 are preferably in non-real-time (nrt) and asynchronous in nature.
  • a synchronous system to be interconnected with (i.e., it may be desired to send messages .0 into a synchronous system in a synchronized manner).
  • An exchange in the PSTN is an example of a synchronized system (e.g., Ericsson AXE10 exchange) to which the instant invention may be connected.
  • An exemplary method of such adaptation to a synchronous system/network may »5 comprise buffering the outgoing message stream on the interface (I F) board 17 via a memory 23, and then clocking out the message to the end user 19 in a TDM (time division multiplexed) manner.
  • the message stream from the client 11 into the I/F memory/buffer 23 is asynchronous
  • the message stream output from the memory/buffer 23 is synchronous.
  • dotted line 21 which differentiates between the asynchronous and synchronous domains.
  • clients 11 still buffer 10 the message portions received from server 7 in a manner so that the clients 11 can output the resulting messages in the expected format and/or rate, but synchronism is not achieved until buffering 23 at the I/F 17.
  • buffers/memories 23 at respective I/Fs are preferably smaller than buffers/memories 10 of clients 11 (assuming that the clients 11 take care of handling the nrt issues arising from nrt transport 9).
  • An exemplary buffer 23 is one capable of taking care of forty
  • buffer 23 in this example would be one capable of storing at least about 40 bytes, more preferably from about 50-120 bytes.
  • Client buffers 10 may be larger than this in preferred embodiments.
  • synchronizing buffer/memory 23 may be located at switch 15 instead of at I/F 17.
  • messages may be sent in different formats from server 7 to clients 11.
  • clients 11 may receive messages and/or message portions from server 7 in the form of text, voice, pictures, video clips, SMS, or any other suitable format.
  • Clients 11 are capable of converting any received message format to a synthetic voice or speech format for playing out to respective users 19 via switch 15 and I/F(s) 17.
  • an existing speech chain i.e., an active call or a call that is already set up.
  • FIGS 3-4 illustrates an exemplary telecommunications network in which certain embodiments of the instant invention may be implemented.
  • This network includes a core network 27 having a plurality of media gateway (MGW) nodes 25 on an edge thereof, mobile switching center (MSC) server 29 in communication with at least one MGW 25, home subscriber server (HSS) 31, at least one external network (e.g., PSTN, ISDN, PLMN, Internet and/or Intranet) 33, transfer switching center (TSC)
  • MGW media gateway
  • HSS home subscriber server
  • TSC transfer switching center
  • UTRAN 45 includes a plurality of radio network controllers (RNCs) 39 which are in communication with respective radio base stations (BSs) 41.
  • RNCs radio network controllers
  • Base stations 41 communicate with mobile stations (MS) 43 (e.g.,
  • LO cellular telephones via a radio interface 42 in a known manner.
  • the communications system between MSC 29, RNCs 39, BSs 41 and MSs 43 is known in the art. For example, see U.S. Serial No. 09/095,585, the disclosure of which is hereby incorporated herein by reference.
  • the network architecture of Figures 3-4 divides the network into a network L5 control and a common connectivity layer.
  • the MSC server 29 controls circuit mode services and the SGSN server 37 controls packet mode services.
  • the MGW node 25 utilizes open interfaces 17 to connect to different types of nodes in the core network 27 and in external networks 33, 45.
  • the illustrated H.248 protocol is the MGW control interface that enables a 20 separation of the network control and the connectivity layers, while "lu" is the interface toward the radio access network UTRAN 45 where base stations 41 and mobile stations (e.g., cell phones) 43 are located.
  • a voice call between (a) a mobile station 43 communicating with a base station(s) 41 of UTRAN 45, and (b) a phone user on the 25 PSTN 33, may be interconnected by the two MGWs 25 illustrated at the edge of core network 27.
  • the left-hand MGW 25 performs ATM (asynchronous transfer mode) switching to switch the voice system to the right MGW.
  • the MSC 29 and GMSC/TSC server 35 control the other or right hand MGW 25.
  • This latter MGW 25 processes the voice stream and interfaces with the PSTN 33 thereby enabling a user of a fixed phone on the PSTN to carry on a conversation with a user of a mobile station (e.g., cellular phone) 43 on UTRAN 45.
  • a mobile station e.g., cellular phone
  • FIG. 5 is a functional block diagram of an exemplary MGW 25 where an embodiment of this invention may be located.
  • MGW node 25 includes switch fabric 15 to which a plurality of different interfaces 17 (e.g., ATM interface, TDM interface, IP (Internet Protocol) interface, and/or Ethernet interface), processing board 3, special purpose board (SPB) 14, and media stream board (MSB) 12 are connected.
  • interfaces 17 e.g., ATM interface, TDM interface, IP (Internet Protocol) interface, and/or Ethernet interface
  • SPB special purpose board
  • MSB media stream board
  • Processing board 3 at MGW node 25 may be targeted for processes that execute on a distributed processor cluster.
  • MSB 12 is targeted for stream processing, and includes a number of digital signal processors (DSPs) 13.
  • DSPs digital signal processors
  • MSB 12 may include conventional speech circuitry such as speech coder(s), echo canceler(s), circuit switched data application(s) providing modem functionality towards PSTN and/or ISDN, a tone sender(s)/receiver(s) for providing tones to be sent to and received from end users and/or DTMF sender(s)/receiver(s).
  • speech coder speech coder
  • echo canceler circuit switched data application
  • circuit switched data application providing modem functionality towards PSTN and/or ISDN
  • a tone sender(s)/receiver(s) for providing tones to be sent to and received from end users
  • connection handler 16 is preferably located at the node of the client(s) 11, and thus need not be located at the same node as the announcement server.
  • connection handler 16 may be located on a general processor board (GPB) at this node which is connected to switch 15.
  • GPB general processor board
  • connection handler 16 may communicate with the announcement server 7 via the nrt transport using switch 15.
  • the nrt transport 9 is the same as switch 15 because the clients 11 and server 7 are at the same node. However, this need not be the case when the client(s) 11 and server 7 are at different nodes.
  • announcement/message server 7 along with server memory 5 may be located on board 3.
  • a plurality of clients 11 may be located along with respective processors 13 on board 12, so that boards 3 and 12 are operatively associated with and can communicate with one another via switch fabric (e.g., ATM switch) 15.
  • Interfaces 17 enable clients 11 to send out messages in accordance with this invention to various end users via, for example, an ATM interface, a TDM interface, an IP interface, and/or an Ethernet interface.
  • clients 11 may send respective messages to end users such as mobile stations 43, fixed telephone users connected to the PSTN, and/or any other suitable end user reachable via any one of interfaces 17.
  • other clients 11 may be located at other MGW nodes 25 and/or at other nodes in the network such as at a server node 29, 35, 37, an R-NC node 39, or a BS node 41.
  • MSB 12 includes a plurality of processors 13 and corresponding clients 11.
  • the DSP host processor bus (DSPH) is used to transfer packets between the shared memory (e.g., SRAM) and the DSPs 13.
  • Another data bus interfaces the FPGA to the shared memory.
  • a board processor interface (BPI) includes the bus from the device board module (DBM) and a general purpose interface.
  • the DSPs 13 process packets (e.g., voice streams) upon receiving them. In certain embodiments, only one packet at a time is processed by a DSP. If packets on other channels in the same DSP are received during the period the relevant DSP is occupied, packets are put into queue/buffer. Thus, it is possible to run multiple channels in one DSP and reduce the amount of DSPs on board. Accordingly, DSPs 13 may be shared by this invention as well as other functionalities utilized on MSB 12.
  • server 7 may be provided at other nodes of the network as may clients 11.

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

L'invention se rapporte à un système et/ou un procédé d'annonces de messages dans une structure client(s)-serveur. Une pluralité de messages, ou des fractions de messages, sont stockées dans une mémoire d'un serveur d'annonces/de messagerie, qui, dans des modes de réalisation préférés, peut être une ressource partagée dans un noeud du réseau. Le serveur peut desservir de multiples clients d'annonces/de messagerie. Le serveur distribue les messages appropriés aux divers clients d'annonces à travers le système. Le message peut constituer, par exemple, 'Le numéro 123 456 7890 a été déconnecté', ou 'Le numéro que vous avez composé xxx yyy zzz n'est pas en service'. Le traitement/la manipulation du flux de messages peut être effectué en mode asynchrone entre le serveur et le ou les clients. Il est toutefois possible d'adapter et/ou d'interconnecter le système avec des systèmes synchrones par l'intermédiaire d'au moins une interface (I/F).
PCT/SE2001/002304 2000-10-31 2001-10-19 Systeme et procede permettant d'annoncer des messages a des usagers du telephone dans un reseau de telecommunications WO2002037813A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU2001296181A AU2001296181A1 (en) 2000-10-31 2001-10-19 System and method for announcing messages to phone users in a telecommunicationsnetwork

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US69939700A 2000-10-31 2000-10-31
US09/699,397 2000-10-31

Publications (1)

Publication Number Publication Date
WO2002037813A1 true WO2002037813A1 (fr) 2002-05-10

Family

ID=24809133

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/SE2001/002304 WO2002037813A1 (fr) 2000-10-31 2001-10-19 Systeme et procede permettant d'annoncer des messages a des usagers du telephone dans un reseau de telecommunications

Country Status (2)

Country Link
AU (1) AU2001296181A1 (fr)
WO (1) WO2002037813A1 (fr)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0845894A2 (fr) * 1996-11-05 1998-06-03 Boston Technology Inc. Un système pour accéder aux boítes aux lettres et aux messages multimédias sur Internet et par téléphone
WO1998059486A1 (fr) * 1997-06-20 1998-12-30 Telecom Ptt Systeme et procede de codage et de diffusion d'informations vocales
EP0913981A2 (fr) * 1997-10-06 1999-05-06 Octel Communications Corporation Système de messagerie unifiée et méthode fournissant des trains de messages d'antéméoire

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0845894A2 (fr) * 1996-11-05 1998-06-03 Boston Technology Inc. Un système pour accéder aux boítes aux lettres et aux messages multimédias sur Internet et par téléphone
WO1998059486A1 (fr) * 1997-06-20 1998-12-30 Telecom Ptt Systeme et procede de codage et de diffusion d'informations vocales
EP0913981A2 (fr) * 1997-10-06 1999-05-06 Octel Communications Corporation Système de messagerie unifiée et méthode fournissant des trains de messages d'antéméoire

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
VINCENT T: "Digital audio and disabled learners", INNOVATIONS IN EDUCATION AND TRAINING INTERNATIONAL,KOGAN PAGE, LONDON,,GB, vol. 33, no. 1, February 1996 (1996-02-01), pages 66 - 67, XP002163849, ISSN: 1355-8005 *

Also Published As

Publication number Publication date
AU2001296181A1 (en) 2002-05-15

Similar Documents

Publication Publication Date Title
US6577712B2 (en) Distributed voice mail system
JP5118112B2 (ja) パケットデータメッセージングシステムを使用してボイスメールを提供するための装置、システム、および方法
US7149501B2 (en) Voice mail server, mobile station and method for voice mail message transmission
US6724801B1 (en) Method and system enabling communications between a switched telephone network and a wireless network
EP1325618B1 (fr) Transmission de la voix sur des systemes a commutation par paquets sans fil
US6748229B1 (en) Method and apparatus for mobile telecommunication
JP4034187B2 (ja) ボイスオーバーｉｐ優先度及び帯域要件の最適化
JP2003507936A (ja) Ａｔｍ通信網とｉｐ通信網との間の相互通信方法と装置
CN1985502A (zh) 使用分组数据消息传递系统提供语音邮件服务的设备、系统和方法
MXPA02000017A (es) Implementacion de establecimiento de llamada basica que transporta direccion de capa y punto logico en direccion hacia atras en redes celulares con separacion de control de llamada y control de apoyo.
US7809839B2 (en) Method and system for call set-up between mobile communication terminals
US20040151158A1 (en) Method and apparatus for exchanging voice over data channels in near real time
US6977911B1 (en) Scalable voice over IP system configured for dynamically switching codecs during a call
JP3833414B2 (ja) タイム・スロット・インターチェンジ・ネットワークを有するデジタル・スイッチによるインターネット・トラヒックの切り替え
CN101110786B (zh) 一种基于软交换网络实现的统一消息系统
US20090238176A1 (en) Method, telephone system and telephone terminal for call session
JPH10304455A (ja) 無線パケット音声着信装置
WO2002037813A1 (fr) Systeme et procede permettant d'annoncer des messages a des usagers du telephone dans un reseau de telecommunications
JP2001186262A (ja) 留守番サービス機能を備えた移動通信システムとその網側装置
KR100454679B1 (ko) 이동 통신 시스템에서 음성 메시지로부터 변환된멀티미디어 메시지 제공방법
JP3388893B2 (ja) パーソナル通信サービス装置
KR100372051B1 (ko) 차세대 이동통신 시스템에서 호 처리 방법
JPH11313368A (ja) 移動データ通信システムとそのデータ通信装置及び移動端末装置
Chan et al. Integrated telephone/fax/paging/e-mail services over ATM/MAN-based personal communication networks
WO2001006718A1 (fr) Debit binaire variable dans un commutateur de circuit

Legal Events

Date Code Title Description
DFPE Request for preliminary examination filed prior to expiration of 19th month from priority date (pct application filed before 20040101)
121 Ep: the epo has been informed by wipo that ep was designated in this application
REG Reference to national code

Ref country code: DE

Ref legal event code: 8642

122 Ep: pct application non-entry in european phase
NENP Non-entry into the national phase

Ref country code: JP