EP1203496A1 - Procede d'etablissement d'une connexion permanente de transmission de donnees basse vitesse - Google Patents

Procede d'etablissement d'une connexion permanente de transmission de donnees basse vitesse

Info

Publication number
EP1203496A1
EP1203496A1 EP00962193A EP00962193A EP1203496A1 EP 1203496 A1 EP1203496 A1 EP 1203496A1 EP 00962193 A EP00962193 A EP 00962193A EP 00962193 A EP00962193 A EP 00962193A EP 1203496 A1 EP1203496 A1 EP 1203496A1
Authority
EP
European Patent Office
Prior art keywords
data
cpe
subscriber terminal
telephone exchange
network
Prior art date
Legal status (The legal status 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 status listed.)
Withdrawn
Application number
EP00962193A
Other languages
German (de)
English (en)
Inventor
Cornel Klein
Chandan Das
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Siemens AG
Original Assignee
Siemens AG
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 Siemens AG filed Critical Siemens AG
Publication of EP1203496A1 publication Critical patent/EP1203496A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
    • H04L12/2854—Wide area networks, e.g. public data networks
    • H04L12/2856—Access arrangements, e.g. Internet access
    • H04L12/2858—Access network architectures
    • H04L12/2859—Point-to-point connection between the data network and the subscribers
    • 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
    • H04M7/1205—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 where the types of switching equipement comprises PSTN/ISDN equipment and switching equipment of networks other than PSTN/ISDN, e.g. Internet Protocol networks
    • H04M7/121—Details of network access arrangements or protocols
    • H04M7/122—Details of network access arrangements or protocols where the PSTN/ISDN access is used as an access to networks other than PSTN/ISDN
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q3/00—Selecting arrangements
    • H04Q3/0016—Arrangements providing connection between exchanges
    • H04Q3/0025—Provisions for signalling

Definitions

  • the invention relates to a method for providing a permanently available narrowband data connection for the transmission of data between a subscriber terminal and a data network connected to a digital telephone exchange in a public telephone network.
  • the figure shows a communication network comprising a public telephone network PSTN and a data network DN, e.g. the Internet.
  • the connection between the public telephone network and the data network DN is established via an access node AP.
  • This has a connection, for example through at least one dialing connection via the public telephone network PSTN or through a signaling channel via the signaling network SN, e.g. CCS7, the public telephone network or through a switched virtual connection via a packet-switching network PN e.g. X.25, to a digital telephone exchange EXCH of the public telephone network.
  • a subscriber of the public telephone network wants to establish a data connection to the data network, for example DN, with his subscriber device, for example CPE, a connection is currently being switched via a digital telephone exchange, for example EXCH, to a modem of an access node, for example AP.
  • the subscriber has a constant transmission bandwidth available for the transmission of data.
  • the transmission rate is maximum time 56 Kbit / s.
  • a transmission rate of currently 64 Kbit / s can be used to transmit data.
  • This procedure is disadvantageous in that the participant is informed of events that have occurred in the data network, e.g. the arrival of electronic mail, cannot be informed automatically since there is no connection to the data network.
  • events that have occurred e.g. To be able to query electronic mail, the subscriber must first with his subscriber terminal, e.g. a personal computer, a dial-up connection to an access node e.g. Create AP. Establishing the connection, for which signaling of the communication partner, synchronization of the modems involved and authorization processes are necessary, takes a lot of time.
  • a dial-up connection For each session of the subscriber with a computer of the data network, which takes longer than average due to the downloading of extensive data from the computer mentioned to the subscriber terminal in comparison to conventional telephone calls, a dial-up connection must be switched via at least one digital telephone exchange in the public telephone network. As a result, the resources required for data and call connections in the digital telephone exchanges or in the public telephone network are occupied for a very long time.
  • the available transmission rate of 56 Kbit / s or 64 Kbit / s is not always necessary for the transmission of the data from the data network towards the subscriber terminal, so that basically too much transmission bandwidth is used.
  • the subscriber can use the so-called “Always On / Dynamic ISDN” technology (see, for example, A. Kuz a, "Always On / Dynamic ISDN > ⁇ N- M H- 1 ⁇ o ⁇ O C ⁇ O C ⁇
  • the object of the invention is to develop a method in such a way that the subscriber having an analog subscriber line is automatically informed of the events mentioned and at the same time access to a data network is made possible in the most resource-saving manner possible via the public telephone network.
  • the invention relates to a method for providing a permanently available narrowband data connection for the transmission of data between a subscriber terminal of an analog subscriber line within a public telephone network and a data network connected to a digital telephone exchange.
  • the data connection is provided in such a way that no user channel connection has to be switched through the public telephone network between the subscriber terminal and the data network.
  • the subscriber can request services of the data network, for example reading and processing electronic mail, or executing applications that require only a small transmission bandwidth.
  • the participant also has the benefit of being informed about events that have occurred in the data network, eg receipt of electronic mail and to be able to react immediately to the events that have occurred, without a time-consuming connection establishment procedure to the data network.
  • the subscriber can request services such as, for example, a quick query of a telephone directory from the data network without having to first establish a connection to the data network.
  • the narrow-band, permanently available data connection is not switched through by a telephone exchange, but instead uses signaling methods or transmission methods used on analog connection lines, which are normally used in mobile networks, in such a way that data can be transmitted without using scarce resources to occupy one or more digital telephone exchanges or user channels in the public telephone network.
  • the figure shows the network constellation explained at the beginning, to which the method according to the invention can be applied.
  • the following transmission techniques are used on the sections of the entire data connection divided as follows between the access node AP to the data network and the subscriber terminal device CPE:
  • the transmission of the data on this section takes place via a virtual data connection of a data network, for example PN in the form of an X.25 network or in the form of an IP-based packet-switching network, which - as shown in the figure - connects the access node AP with the digital telephone exchange EXCH connects.
  • a data network for example PN in the form of an X.25 network or in the form of an IP-based packet-switching network, which - as shown in the figure - connects the access node AP with the digital telephone exchange EXCH connects.
  • a signaling channel of the signaling network e.g. SN in the form of a CCS7
  • Network the public telephone network provided, which is temporarily used not for the transmission of signaling information, but for the transmission of data between the telephone exchange EXCH and the access node AP.
  • the data in this section is transmitted via at least one switched dial-up connection via which IP data packets can be transmitted.
  • the functionality of the access node AP is integrated in the area of a line unit of the digital telephone exchange EXCH.
  • the connection units for connecting subscriber devices communicate with the connection unit in which the functionality of the access node is integrated by means of exchange-specific internal messages, e.g. so-called reports. These internal messages can be used to transfer the data.
  • the so-called “On hook data transmission” or “Off hook data transmission” can be used to transmit the data between the digital telephone exchange and the subscriber terminal, which is described in more detail in the ETS 300 659 part 1 and 2 standard.
  • This method allows data to be transmitted at a transmission rate of 1200 bit / s in this section even when the telephone connection is not switched.
  • the data are transmitted in the form of so-called FSK signals (Frequency Shift Keymg).
  • the FSK signals can be generated within the digital telephone exchange either in a special connection unit equipped with such functionality or in the connection unit to which the subscriber terminal is connected.
  • the subscriber end device must be equipped with a detector which recognizes the corresponding FSK signals even when there is no connection. If there is a connection, this detector must be designed in such a way that it can separate voice and data signals. In addition, he should be able to suppress the reproduction of the same on the telephone handset, for example, when an FSK signal arrives.
  • the subscriber end device In the “on hook” state, the subscriber end device must first close the loop before transmitting the data in the direction of the digital telephone exchange. In the “off hook” state, the subscriber device switches off the loudspeaker, if present, during the transmission of the data and may have to briefly interrupt a switched voice connection.
  • connection units of the digital telephone exchange must be designed such that they recognize the transmission of the data in the form of FSK or DTMF signals.
  • the transmission speed is currently limited to approximately 30 bps.
  • known transmission methods and devices within the subscriber terminal or within the digital telephone exchange can be used.
  • such devices can either be in a connection unit for connecting the subscriber terminal e.g. CPE or in a special connection unit equipped with a corresponding functionality. If a special connection unit is used, during the transmission of the data the transmission channel is briefly switched through the switching network present in the telephone exchange.
  • corresponding data transmission devices for example modems for generating and recognizing data signals, for example FSK
  • a connection is briefly switched from the subscriber device through the switching center to a data transmission device in the access node for data transmission.
  • no signaling formation between the connections exchange and the access node must be replaced.
  • no data connection is required, for example via X.25, between the exchange and the access node.
  • software adjustments in the system or application software of the exchange can be saved.
  • the known CLIP method can be used as the transmission method, for example, which is usually used when the calling number of the calling subscriber is displayed.
  • the subscriber end device should recognize from the number of the calling access node that the call is ringing before the "ringing" that it is a data connection and handle the call in a suitable manner.
  • a sensible addition to the method according to the invention is that, if requested by the subscriber or depending on the transmission bandwidth required for the transmission of the data, an additional useful channel is switched on or off on the section between the subscriber end device and the access node can be.
  • the connection set-up of the additional useful channel can be accelerated by, for example, dispensing with renewed authentication of the subscriber.
  • the following standardized protocols can be used to transmit the data over the narrowband permanent data connection between the subscriber device CPE and the data network DN: 1.
  • the protocols TCP / IP as well as the HTTP protocol based thereon and the description language HTML are used.
  • Wireless Application Protocol Architecture Specification, Wireless Application Protocol Forum, 1998), which enable mobile stations to access the Internet using the so-called Wireless Application Protocol, a restricted version of HTML and HTTP.
  • This WAP The protocol can also be used to transmit data over the narrowband permanent data connection in the fixed network, ensuring that service providers' Internet servers adapted to the WAP protocol are also available for access via the narrowband permanent data connection.
  • the analog display service interface protocol which is described, for example, in the “Analog Display Services (ADSI) Interface Guide”, Bellcore Document SR 2727, Bell, can also be used for the transmission of the data between the subscriber device and the access node to the data network Communications Research, 1996. This protocol allows subscribers to access advanced information and features about their device by providing bidirectional data communication between the device and a local server.
  • a gateway function m is integrated into the digital telephone exchange.
  • This gateway function implements, for example, the ADSI protocol used on the section between the subscriber terminal and the digital telephone exchange and the WAP protocol, and vice versa, which is used on the section between the digital len telephone exchange and the access node to the data network or a server in the data network of a service provider is used.
  • the functionality of a "browser" normally running in the subscriber terminal is integrated in the access node to the data network, ie the preparation and display
  • the subscriber terminal device then only needs to be equipped with terminal functions and a memory of lower capacity. From the access node, only text data are transferred to the subscriber terminal device, and formatting instructions are transmitted, in order, for example, to store the text data stored in the memory on a Display of the subscriber terminal equipment.
  • the choice of the service number does not lead to the establishment of a switched connection via the digital telephone exchange of the public telephone network to an access node to the data network. Instead, the service number is transmitted towards the access node via the permanent data connection explained above.

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Telephonic Communication Services (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

Selon l'invention, pour un dispositif terminal d'abonné (CPE) raccordé de façon analogique à un central de télécommunication numérique, une liaison de transmission de données, à bande étroite, disponible en permanence, est établie pour la transmission de données entre le dispositif terminal d'abonné (CPE) et un réseau de transmission de données (DN) rattaché à un central de télécommunication (EXCH) numérique d'un réseau téléphonique public. Pour la liaison de transmission de données, le réseau téléphonique mobile n'a pas à commuter sur un canal utile.
EP00962193A 1999-08-10 2000-08-03 Procede d'etablissement d'une connexion permanente de transmission de donnees basse vitesse Withdrawn EP1203496A1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19937708 1999-08-10
DE1999137708 DE19937708A1 (de) 1999-08-10 1999-08-10 Verfahren zur Bereitstellung einer permanent verfügbaren schmalbandigen Datenverbindung
PCT/DE2000/002602 WO2001011900A1 (fr) 1999-08-10 2000-08-03 Procede d'etablissement d'une connexion permanente de transmission de donnees basse vitesse

Publications (1)

Publication Number Publication Date
EP1203496A1 true EP1203496A1 (fr) 2002-05-08

Family

ID=7917830

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00962193A Withdrawn EP1203496A1 (fr) 1999-08-10 2000-08-03 Procede d'etablissement d'une connexion permanente de transmission de donnees basse vitesse

Country Status (3)

Country Link
EP (1) EP1203496A1 (fr)
DE (1) DE19937708A1 (fr)
WO (1) WO2001011900A1 (fr)

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB9408798D0 (en) * 1994-05-04 1994-06-22 Plessey Telecomm Connectionless information service delivery
US6144657A (en) * 1997-11-06 2000-11-07 Sun Microsystems, Inc. Remote device connection to a network

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO0111900A1 *

Also Published As

Publication number Publication date
WO2001011900A1 (fr) 2001-02-15
DE19937708A1 (de) 2001-02-22

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