WO2000079744A1 - Perfectionnements se rapportant a la telephonie par internet - Google Patents

Perfectionnements se rapportant a la telephonie par internet Download PDF

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Publication number
WO2000079744A1
WO2000079744A1 PCT/SE2000/001216 SE0001216W WO0079744A1 WO 2000079744 A1 WO2000079744 A1 WO 2000079744A1 SE 0001216 W SE0001216 W SE 0001216W WO 0079744 A1 WO0079744 A1 WO 0079744A1
Authority
WO
WIPO (PCT)
Prior art keywords
network
terminal
gateway
node
connection
Prior art date
Application number
PCT/SE2000/001216
Other languages
English (en)
Inventor
Dipankar Ray
Original Assignee
Telefonaktiebolaget L M 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
Priority claimed from SE9902397A external-priority patent/SE9902397D0/xx
Application filed by Telefonaktiebolaget L M Ericsson (Publ) filed Critical Telefonaktiebolaget L M Ericsson (Publ)
Priority to AU58597/00A priority Critical patent/AU5859700A/en
Publication of WO2000079744A1 publication Critical patent/WO2000079744A1/fr

Links

Classifications

    • 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
    • H04M7/125—Details of gateway equipment
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/66—Arrangements for connecting between networks having differing types of switching systems, e.g. gateways
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M2207/00—Type of exchange or network, i.e. telephonic medium, in which the telephonic communication takes place
    • H04M2207/18—Type of exchange or network, i.e. telephonic medium, in which the telephonic communication takes place wireless networks

Definitions

  • the invention regards the use of mobile telephones for accessing other telephone subscribers.
  • Mobile, or cellular telecommunications equipment is being used by more and more people, and is widely appreciated for the freedom of movement that it offers. At present, the functions offered hi such networks are developing quickly as well.
  • Some private networks such as Intranets or private branch telephone networks, comprise equipment enabling mobile telephones within the coverage area of the private network to connect to this network. Calls to the public network will then be made through the gateway connecting the private network to the public network, and will therefore be considered as local calls in the public network, which are normally less expensive than calls made through the public cellular network.
  • This option is, however, only available when the mobile telephone is within the coverage area of its own private network.
  • This object is achieved according to the invention by a method of establishing a connection between a first te ⁇ ninal in a first local network and a second te ⁇ ninal in a public network, said first local network being connected to a data communications network through a first gateway, said method comprising the steps of
  • a first communication node connectable to a packet switched data communications network and a first lo- cal network for performing translation between the formats and procedures used by the first local network and the data commumcations network, said node being adapted to
  • the main part of the call may be connected through the Internet, or another data communications network, reducing the cost of the call.
  • the cost of a call increases with increasing distance, local calls being free or relatively inexpensive.
  • Making calls through the Internet is less expensive than making long-distance calls through a telephone network, i.a. be- cause no resources have to be exclusively reserved for such calls, apart from some bandwidth.
  • the solution according to the invention is particularly useful where two local net- works, for example, two co-operating office Intranets in different locations are connected through a communications network, such as the Internet.
  • a communications network such as the Internet.
  • the call may then be made to the other Intranet and through the gateway of this Intranet into the public network.
  • Any type of local network comprising a gateway to a communications network such as the Internet may be used according to the invention.
  • a type of local network that is particularly well suited is a GSM on the net, which enables the connection of mo- bile terminals to, for example, a corporate Intranet with full mobility. As long as a GSM terminal is within the coverage area of its own Intranet, it will automatically be connected to this Intranet. If outside the Intranet, it will connect to the public GSM network. The invention enables the use of this GSM terminal in other Intranets.
  • the authenticity of the first subscriber before the gateway connection is set up. This is done by requesting information from an authentication node, such as the Home Location Register (HLR) or gatekeeper of the subscriber's local network, depending on the type of network. To function, therefore, the authentication node of the other network must be able to request such information, if necessary, and process it.
  • HLR Home Location Register
  • the authentication node of the other network must be able to request such information, if necessary, and process it.
  • the gateway connection is set up to the gateway interconnecting the data communications network and the first subscriber's home network.
  • the first communication node is adapted to receive said request in the form of a terrriinal address identifying said terminal, and forward the request to the gateway interconnecting the data communications network and the first subscriber's home network.
  • the call will be handled as a call made from the calling subscriber's lo- cal network.
  • the gateway connection is always set up to the gateway nearest to the called subscriber.
  • the first communication node is adapted to receive said request in the form of a terminal address identifying said terminal, retrieve an address of said second communications node from a gatekeeper node based on said terminal address and use this address for forwarding said request to said second communications node.
  • the second gateway is identified in the request for the connection to the second terminal.
  • the first communication node is adapted to receive said request in the form of a node address identifying said second communications node and a terminal address identifying said terminal and forward the terminal identifier to said second communications node.
  • an address of the second gateway may be retrieved by the first gateway from a first gatekeeper, based on the address of the second terminal.
  • the calls are handled as if they were local calls in the called subscriber's network, minimizing the cost of the calls.
  • a suitable data communications network for use with the invention is the Internet, or World Wide Web.
  • the Internet is today a very well known and world-wide system. Via the ordinary telephone network, access can be obtained to this system, which transmits data in a particular protocol and in packets. Once the Internet is ac- Stopd, information is passed on in a high-capacity system from an origin to a destination at a very reasonable cost.
  • LP Internet Protocol
  • LP is thus a method of taking data and dividing it in to many small pieces, or packets, and giving it an originating address, a destination address and a map for reassembly.
  • Figure 1 shows an example of the establishment of a connection between a mobile phone and a distant phone through an Internet connection
  • FIG. 2 is a general overview of a GSM on the net system
  • Figure 3 depicts the application of the invention in a GSM on the net system
  • Figure 4 is a flow chart of the procedure of setting up a call according to an embodiment of the invention.
  • FIG. 1 shows a communications network in which the invention may be used.
  • the communications network comprises a data communications network 1, which may be the common Internet or world wide web, or a private data communications net- work.
  • a data communications network which may be the common Internet or world wide web, or a private data communications net- work.
  • it is packet switched and utilizes the Internet Protocol (L? ), since this is the most commonly used data communications network today, and functions already exist for transmitting voice communication over such networks.
  • L? Internet Protocol
  • a first radio base station RBSl is connected, through a first gateway GW1.
  • the first gateway GW1 is also connected to a first gatekeeper GK1.
  • a second radio base station RBS2 is connected to the data communications network 1 through a second gateway GW2, which is also connected to a second gatekeeper GK2.
  • a third gateway GW3 may form a connection between the data communications network 1 and a Public
  • the third gateway GW3 may also be connected to the second radio base station RBS2.
  • a mobile subscriber represented by bis mobile terminal 5, can connect to the data communications network 1 through a radio base station, in this case the first radio base station RBSl.
  • a cellular subscriber te ⁇ ninal 7 is shown connected to the second radio base station RBS2, and a subscriber terminal 9 is shown connected to the PSTN network 3.
  • a connection to any terminal, in a Public Land mobile Network (PLMN) or Public Services Telephone Network (PSTN), may be set up through the data communications network (1).
  • PLMN Public Land mobile Network
  • PSTN Public Services Telephone Network
  • the first and second gateways GW1, GW2 handle functions for enabling the radio base stations RBSl, RBS2 to communicate with the data network 1.
  • the third gateway GW3 handles functions for enabling the communication between the data communications network 1 and the PSTN network 3.
  • the gateways GW1, GW2, GW3 performs the appropriate translation between transmission formats and communications procedures. According to the invention, however, they also handle certain additional functions, as will be discussed below.
  • the gatekeepers GK1, GK2 provide call control services, such as address translation and admissions control, as common in the art and also mobility manage- ment, resource management and user administration. Alternatively, these functions may be implemented in different nodes.
  • the network may be, for example a local area network com- prising one or more base stations, or a Digital Enhanced Cordless Telecommunications (DECT) network. It may also be a GSM network.
  • DECT Digital Enhanced Cordless Telecommunications
  • GSM Global System for Mobile communications
  • FIG 2 is an overview of a GSM on the net network 11, in which use of the inven- tion is particularly favourable.
  • the core of the network 11 is a Local Area Network (LAN), comprising a service node 13, an access node 15, and application node 17 and a GSM connection node 19.
  • the network 11 interfaces to other networks through a gateway 21.
  • the service node 13 and access node 15 together co ⁇ espond to the gatekeeper function as described in connection with Figure 1.
  • the service node 13 is responsible for call setup, user administration, security and other system- related services. Call setup involves control of all calls made between different types of access, for example, between ordinary PSTN phone numbers and addresses in the system.
  • the system identity and service profile of each user are stored in the service node.
  • the service node also handles authentication, resource management and least-cost routing.
  • the access node 15 enables terminals to access the system. More than one access node may be needed, for different types of terminal.
  • a wireless access node is involved when calls are set up to or from a GSM terminal.
  • the access node itself does not carry any traffic, but only controls the communication.
  • GSM terminals 23, 25 access the network through the GSM connection node 19, which comprises a base transceiver station and serves as a gateway between the air interface and the LAN environment.
  • Other terminals, such as telephones 27 and per- sonal computers 29 may also be connected to the network.
  • Figure 3 illustrates the interconnection of a first 100 and a second 100' GSM on the net systems through the Internet 101, and how it can be used according to the invention.
  • Both the first 100 and the second 100' GSM on the net networks are Local Area Networks (LAN), each comprising a service node 113, 113', an access node 115, 115', and application node 117, 117' and a GSM connection node 119, 119'.
  • LAN Local Area Networks
  • Each of the networks 100, 100' interfaces to the Internet 101 through a gateway 121, 121, respectively.
  • the function of each node was discussed in connection with Figure 2.
  • other terminals 127, 127', 129, 129' are connected to the networks as well.
  • the registered subscribers will be connected automatically to their own local network when in the coverage area of this network.
  • their telephones automatically function in the public GSM network instead.
  • this network would have to recognize the subscribers in other GSM on the net networks. This could be achieved in different ways.
  • the service node or access node of each GSM on the net network could have infor- mation about the subscribers of all other GSM on the net networks that should be allowed to connect.
  • Each of the GSM on the net networks 100, 100' will probably be connected through the respective gateway 121, 121 ' to other networks as well.
  • the first GSM on the net network 100 is connected through its gateway 121 to a public cellular telephone network, schematically shown in Figure 3 as a network cloud 131 connected to a base station 133.
  • the solution according to the invention allows him to connect to the GSM on the net network that he is currently in, establish a connection to his home GSM on the net network through the Internet, and establish a connection from the gate- way of his home GSM on the net network to the public network in which the other subscriber 135 is found. In this way, the call would be considered a local call, and would therefore incur a lower cost.
  • Step SI The subscriber logs on to the system, by connecting to a service provider for the telephony through data network service.
  • Step S2 The authenticity of the subscriber is checked against the content of a da- tabase, for example, the Home Location Register (HLR) or gatekeeper of the network to which he belongs.
  • Step S3 The subscriber dials the desired number.
  • HLR Home Location Register
  • Step S4 The connection is set up, using information found in the first gatekeeper GK1, through the first gateway GW1 and the data communications net- work 1 to the second gateway GW2, that is the home gateway.
  • Step S5 The second gateway GW2 sends a request comprising the called number to the second gatekeeper GK2.
  • Step S8 The connection between the calling subscriber and the called subscriber is completed. Since the call enters the public network in the gateway close to the called subscriber, it will be treated by the network as a local call. The connection may be set up according to the H.323 protocol.
  • the service of connecting through the data communications network 1 may of course be subject to restrictions.
  • the mobile subscriber may be allowed only to make calls to his home network, or the service may be open only to subscribers who have a special subscription for it.
  • Such restrictions may be handled by one of, or both the gatekeepers GK1, GK2.
  • Each gatekeeper may keep a database of each subscriber's subscription type and authorization, and determine whether or not the subscriber is authorized to make the requested connection.
  • step S3 the way of entering the desired number may vary.
  • the subscriber only enters the number of the called subscriber.
  • the con- nection to the subscriber's local gateway GW2 is then set up, and the call is handled in the appropriate telephone network from the subscriber's local gateway GW2.
  • the subscriber must know a telephone number identifying a node in the network, preferably the gateway closest to the subscriber he wishes to call.
  • the subscriber first dials the number to the gateway, then the number to the desired subscriber, the two numbers being separated, for example, by one or more * or # or other characters.
  • the number to the gateway will be converted to an IP address, and the second number will be contained in the LP packet. In this way, the gateway can obtain the second number from the LP packet and know to which subscriber the call should be set up.
  • logic could be built into the system, for example to the gatekeeper close to the subscriber making the call, in this case the first gatekeeper GK1, for identifying the location of the subscriber number called.
  • the calling subscriber 5 would only have to dial the subscriber number he wished to call.
  • the gatekeeper will find that the number is not a local number and will forward the number to the gatekeeper of the subscriber's home system, where it will be treated as a normal call made from this system.
  • the gatekeeper may hold information identifying the gateway closest to the called subscriber and automatically connect to this gateway. This information may be retrieved based on the area code or similar information found in the subscriber number.
  • connection set up in step S4 may be to another gateway than the connection to check the subscriber's authenticity in step S2.
  • the connection in step S4 may be set up to the subscriber's local gateway GW2 and forwarded from there to the appropriate local network. The connection may then be forwarded through the Internet, or another data communications network to the gateway of the appropriate local network, or through a telecommunications network.
  • the connection is always forwarded through a telecommunications network.
  • calls will always be considered to be made from the subscriber's local network. Therefore, according to the invention, calls within the subscriber's local network may be made at the local call rate even if the subscriber is somewhere else.

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Telephonic Communication Services (AREA)
  • Data Exchanges In Wide-Area Networks (AREA)

Abstract

Selon l'invention, dans le cas d'un premier et d'un deuxième réseau local respectivement connectés à un réseau de communication par l'intermédiaire d'une première et d'une deuxième passerelle, pour établir une connexion entre un terminal du premier réseau local et un réseau publique, on procéde en plusieurs temps : établissement d'une connexion entre le premier terminal (5; 123) et le réseau de communication de données (1; 101) via la première passerelle (GW1; 121') ; établissement d'une connexion de passerelles entre la première passerelle (GW1; 121') et une deuxième passerelle (GW2, GW3; 121) connectant un deuxième réseau local (RBS2; 100) au réseau de communication de données (1; 101) ; établissement d'une connexion entre le premier terminal (5; 123) et le deuxième terminal (7, 9; 135) via la première passerelle (GW1; 121') et de la deuxième passerelle (GW2, GW3; 121). L'invention concerne également un noeud de communication, de préférence une passerelle, conçu pour la mise en oeuvre de ce procédé. De cette manière, la partie principale de la communication téléphonique peut être connectée par l'intermédiaire d'Internet ou d'un autre réseau de communication de données, réduisant ainsi le coût de la communication téléphonique.
PCT/SE2000/001216 1999-06-23 2000-06-13 Perfectionnements se rapportant a la telephonie par internet WO2000079744A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU58597/00A AU5859700A (en) 1999-06-23 2000-06-13 Improvements in internet telephony

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
SE9902397A SE9902397D0 (sv) 1999-06-23 1999-06-23 Improvements in internet telephony
SE9902397-0 1999-06-23
SE9903595-8 1999-10-06
SE9903595A SE9903595L (sv) 1999-06-23 1999-10-06 Förbättringar inom internettelefoni

Publications (1)

Publication Number Publication Date
WO2000079744A1 true WO2000079744A1 (fr) 2000-12-28

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PCT/SE2000/001216 WO2000079744A1 (fr) 1999-06-23 2000-06-13 Perfectionnements se rapportant a la telephonie par internet

Country Status (3)

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AU (1) AU5859700A (fr)
SE (1) SE9903595L (fr)
WO (1) WO2000079744A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2001045335A1 (fr) * 1999-12-02 2001-06-21 Nokia Corporation Acheminement d'appel dans un systeme de telecommunications
US7260084B2 (en) 2000-09-29 2007-08-21 Siemens Aktiengesellschaft Method for establishing a connection from a terminal of a communication network to a network-external connection destination, and associated apparatus and network

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1998057508A1 (fr) * 1997-06-13 1998-12-17 Telia Ab Mobilite accrue pour systeme dect
WO1999005590A2 (fr) * 1997-07-25 1999-02-04 Starvox, Inc. Appareil et procede pour passerelle vocale integree
WO1999014932A2 (fr) * 1997-09-16 1999-03-25 Transnexus, Llc Controleur pour systeme de redistribution des communications sur internet
JPH11150753A (ja) * 1997-11-18 1999-06-02 Nippon Telegr & Teleph Corp <Ntt> 移動電話システム

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1998057508A1 (fr) * 1997-06-13 1998-12-17 Telia Ab Mobilite accrue pour systeme dect
WO1999005590A2 (fr) * 1997-07-25 1999-02-04 Starvox, Inc. Appareil et procede pour passerelle vocale integree
WO1999014932A2 (fr) * 1997-09-16 1999-03-25 Transnexus, Llc Controleur pour systeme de redistribution des communications sur internet
JPH11150753A (ja) * 1997-11-18 1999-06-02 Nippon Telegr & Teleph Corp <Ntt> 移動電話システム

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
WIETFELD C. ET AL.: "Seamless IP-bases service integration across fixed/mobile and corporate/public networks", VEHIENBAR TECHNOLOGY CONFERENCE, IEEE 49TH, vol. 3, 16 May 1999 (1999-05-16) - 20 May 1999 (1999-05-20), pages 1930 - 1934 *

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2001045335A1 (fr) * 1999-12-02 2001-06-21 Nokia Corporation Acheminement d'appel dans un systeme de telecommunications
US7606261B2 (en) 1999-12-02 2009-10-20 Nokia Corporation Call routing in a telecommunication system
US7260084B2 (en) 2000-09-29 2007-08-21 Siemens Aktiengesellschaft Method for establishing a connection from a terminal of a communication network to a network-external connection destination, and associated apparatus and network

Also Published As

Publication number Publication date
SE9903595L (sv) 2000-12-24
SE9903595D0 (sv) 1999-10-06
AU5859700A (en) 2001-01-09

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