EP0978218A2 - Reseau isdn a systeme intermediaire dect - Google Patents

Reseau isdn a systeme intermediaire dect

Info

Publication number
EP0978218A2
EP0978218A2 EP98931981A EP98931981A EP0978218A2 EP 0978218 A2 EP0978218 A2 EP 0978218A2 EP 98931981 A EP98931981 A EP 98931981A EP 98931981 A EP98931981 A EP 98931981A EP 0978218 A2 EP0978218 A2 EP 0978218A2
Authority
EP
European Patent Office
Prior art keywords
connection
intermediate system
dect
tei
transmission service
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Withdrawn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
EP98931981A
Other languages
German (de)
English (en)
Inventor
Horst Flake
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
Siemens Corp
Original Assignee
Siemens AG
Siemens Corp
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, Siemens Corp filed Critical Siemens AG
Publication of EP0978218A2 publication Critical patent/EP0978218A2/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/69—Spread spectrum techniques
    • H04B1/707—Spread spectrum techniques using direct sequence modulation
    • H04B1/7097—Interference-related aspects
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q11/00—Selecting arrangements for multiplex systems
    • H04Q11/04—Selecting arrangements for multiplex systems for time-division multiplexing
    • H04Q11/0428—Integrated services digital network, i.e. systems for transmission of different types of digitised signals, e.g. speech, data, telecentral, television signals
    • H04Q11/0435—Details
    • H04Q11/0471—Terminal access circuits
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q2213/00—Indexing scheme relating to selecting arrangements in general and for multiplex systems
    • H04Q2213/13097—Numbering, addressing
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q2213/00—Indexing scheme relating to selecting arrangements in general and for multiplex systems
    • H04Q2213/13098—Mobile subscriber
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q2213/00—Indexing scheme relating to selecting arrangements in general and for multiplex systems
    • H04Q2213/13103—Memory
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q2213/00—Indexing scheme relating to selecting arrangements in general and for multiplex systems
    • H04Q2213/13202—Network termination [NT]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q2213/00—Indexing scheme relating to selecting arrangements in general and for multiplex systems
    • H04Q2213/13204—Protocols
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q2213/00—Indexing scheme relating to selecting arrangements in general and for multiplex systems
    • H04Q2213/13209—ISDN
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q2213/00—Indexing scheme relating to selecting arrangements in general and for multiplex systems
    • H04Q2213/1326—Consultation call, broker's call, call hold, toggling
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q2213/00—Indexing scheme relating to selecting arrangements in general and for multiplex systems
    • H04Q2213/13298—Local loop systems, access network

Definitions

  • the invention relates to a method for operating a connection in an ISDN network including at least one intermediate system, in which connections are made between subscribers of the ISDN network, the protocols including a terminal address, a call identification and an identifier of the Transmission service included, and in the intermediate system from the protocol, the terminal address, the call identification and the identifier of the transmission service for each connection are stored in a list.
  • the invention relates to an intermediate system which is included in an ISDN network, connections between subscribers of the ISDN network being conducted via the intermediate system and a list in the intermediate system for storing the terminal address, the call identification and the Identification of the delivery service is provided for each connection from the protocol.
  • the ISDN communication system Integrated Services Digital Network
  • the ISDN communication system features characterized in that the network operator can provide a number of additional services, of which the interest in keeping connections is of interest here. With this additional service, an existing connection can be put on hold by a subscriber and reactivated at a later time.
  • the ISDN channel structure has two user channels, called B channels, each with 64 kbps and a control channel, called D channel, with 16 kbps.
  • B channels are used for the transmission of user information, namely data, voice or 3.1 kHz
  • the ISDN system provides three protocol layers (layers 3), layer 3 of the connection control (connection establishment and termination by means of call identification and identification of the transmission service, control of additional services), layer 2 of the terminal addressing, transmission security, etc. and layer 1 serve the physical transmission of all information in the B / D channel via the subscriber access lines.
  • the DECT standard Digital Enhanced Cordless Telecommunications
  • a radio connection is established between a fixed part which is connected to the fixed network and one or more mobile parts, a user channel with 32 kbps and a control channel with 2 kbps usually being provided.
  • DECT connections can also be used stationary between an interface of an ISDN network and the subscriber-side S 0 interface, in particular if a line connection cannot be installed, for example for structural reasons, or would be more expensive than the radio connection.
  • the invention is concerned in particular with the problem of making the ISDN additional service “hold (of connections)” available to a subscriber even if the connection runs over a DECT intermediate system (or several DECT intermediate systems).
  • the ISDN protocol for "hold” does not contain in its data packets the parameter for the identification of the transmission service, which is not necessary because the B-channel structure in the ISDN system (64 kbps) supports all services.
  • the interposition of a DECT system would only enable this channel transparency if the DECT system were also based on a 64 kbps channel structure. However, this is ruled out because of the channel economy required in the DECT system.
  • This object is achieved according to the invention in a method of the type mentioned at the outset in that when the confirmation for holding a connection is received, the triple terminal address call identification identifier of the transmission service is marked, when a confirmation of the reactivation of a connection is received at the same terminal address in the list is searched for the marked call identification, then a connection of the intermediate system is made available which corresponds to the identifier of the transmission service of the marked trip egg, and finally the marking is deleted again.
  • the invention ensures that when a connection is restored, the intermediate system regains the associated transmission service by comparing the stored and marked parameters.
  • the intermediate system is a DECT intermediate system and connections between subscribers of the ISDN network are made via a first DECT station, an air radio link and a second DECT station.
  • Connection is allocated to an already available DECT channel or if a new and suitable DECT channel is selected for the connection to be switched back.
  • An intermediate system of the type mentioned at the outset is characterized according to the invention in that the intermediate system and the list are set up to provide the triple terminal address call identification identification of the transmission service with a receipt when the confirmation for holding a connection is received, when a confirmation of a reactivation of a connection is received, look for the marked call identification in the list under the same terminal address, provide a connection of the intermediate system corresponding to the identification of the transmission service of the marked triplet and delete the marking again.
  • the intermediate system is a DECT intermediate system, with connections between subscribers of the ISDN network being routed via a first DECT station, an air radio link and a second DECT station and a DECT station and the list are configured to provide the triple terminal address call identification identifier of the transmission service with a mark when the confirmation for holding a connection is received, to search for the marked call identification in the list upon receipt of a confirmation of a reactivation of a connection under the same terminal address to provide a DECT connection corresponding to the identification of the transmission service of the marked triple and to delete the marking again.
  • Fig. 1 in a symbolic block diagram of a telecommunications network with an ISDN system and an intermediate DECT system
  • Fig. 2 in a block diagram a DECT intermediate system according to Fig. 1 and Fig. 3 schematically the exchange of the hold and downshift messages and the entry in a list of the DECT intermediate system.
  • the DECT intermediate system IS here consists of a fixed part, generally a first DECT station FP, and a mobile part, generally a second DECT station PP, it being possible to set up an air radio link CI between the two stations.
  • Various interfaces can be present between the ISDN network NE and the DECT intermediate system IS, which are symbolically designated IF here.
  • Two subscribers TE 1, TE 2 are shown connected to the network NE.
  • both the first and the second station FP or PP of the DECT intermediate system have a work unit FIWU or PIWU.
  • the intermediate system IS must have sufficient information about the current ISDN protocols.
  • the protocols in the ISDN or in the DECT system are designated I-Ll, I-L2 and I-L3 or D-Ll, D-L2 and D-L3. Details on the ISDN or DECT systems, in particular also on the protocol structure in these systems, can be found, for example, in the following literature: ETSI
  • the DECT intermediate system IS contains an I-L3 monitor function, which is contained here as block L3-MON in the working unit FIWU of the fixed part FP, and which analyzes the protocol of the ISDN location 3 and is essential for each call Saves parameters.
  • the work unit FIWU of the fixed part FP has a master function for controlling the DECT system compared to the work unit PIWU of the mobile part PP which has only a slave function, the work unit FIWU of the fixed part FP controlling those of the mobile part PP via D-L3 protocol elements.
  • the terminal will send a setup message ("set-up") towards the network.
  • a call identification for example CR 2
  • the identifier of the transmission service (Bearer Capability) BC is specified and the network is thus informed of which transmission service is required, for example the "Voice” service.
  • the setup message is analyzed, namely by the work unit FIWU in the fixed part FP, it being determined that a subscriber with the call identification CR 2 and calls the identifier of the transmission service "language”.
  • This triple TEI 1 - CR 2 - BC 1 is stored in a memory or a list LIS and a DECT connection is set up according to the specifications, which is suitable for transmitting voice.
  • the ISDN network that receives this set-up message now determines that someone wants to set up a connection, but the network has no information that a DECT system is connected.
  • the ISDN network will now fade in a dial tone and acknowledge the setup message.
  • the network accordingly sends a "setup confirmation" message and thus requests subscriber A and the terminal to provide dialing information.
  • the DECT system issues this setup message, which also contains information about which B channel is the basis for this connection
  • the subscriber then enters the dialing information for the network that accepts the call number.
  • the DECT system transmits the corresponding information package transparently. After the network has recognized the dialed number as usable, it sends a so-called "Call Process" message to subscriber A.
  • the called subscriber TE 1 has now been reached and it rings, with no pickup.
  • the subscriber reports this to the network in ISDN protocol level 3.
  • the network When the network has determined this, it sends the calling subscriber TE A an "alerting message". In the voice service, this is always accompanied by the corresponding signals in the useful channel.
  • the called subscriber TE 1 then lifts off and the calling subscriber A connection signal ("Connect") is reported to TE A, ie the called subscriber TE 1 is switched on and the call is now in the active state (called state) at the called subscriber TE 1.
  • the setup message goes to the network on the called side. If the network has enough choice information, it sends Network on the calling side to the desired, called subscriber a setup message. In this the network communicates a call identification and also the identification of the transmission service, which is of course the same as on the calling side. The network merely establishes the relationship to the call identifications, which are present as a very specific bit pattern at a specific point in the protocol.
  • a call identification thus a process numbering, is required in each signaling process. which can in principle be assigned arbitrarily. In principle, this call identification is always specified by the person who makes the call, i.e. the subscriber can specify it to the network or vice versa, and all others then refer to it.
  • the call identifications are not identical between the calling and the called side, since they are assigned locally.
  • the network ensures that the calls match each other and also sends a setup message on the called side with a call identification and with the desired identifier of the transmission service.
  • the network determines which end device receives the call by means of a connection confirmation ("Connect- Acknowledge "), which is sent to the terminal that receives the call. This is clearly determined by the terminal identifier, since each terminal has a different terminal identifier.
  • the terminal therefore always has its service signal and / or its connected message with an individual terminal identifier
  • the first device that answers is thus clearly identifiable, and this is sent the connection confirmation, whereby all these messages always have the same call identification, since they always refer to the same call the connection is active at the called subscriber and the subscribers can now communicate with each other.
  • a DECT intermediate system can also be present on the called side (here subscriber TEI), in which the triplet TEI-CR-BC is again in a list is saved.
  • “Hold” can be used. In the course of a conversation between the two participants, one participant could, for example, request a query from another participant. The participants can arrange this and a participant, for example TE A, then presses a stop or query key, which amounts to that the previously existing connection is put on hold. This is also clearly signaled to the other subscriber TE 1, the connection remains and the charges are borne by the caller.
  • the participant TE A who switches to hold, would like to make a follow-up call, for example, and requires a B channel for this.
  • the ISDN system reserves a B channel for this, since it could otherwise be that one of the other terminals - if others are connected - "takes away" this channel from the subscriber TE A who has just switched to hold.
  • FIG. 3 If the subscriber TE A wants to put his connection on hold, a hold message HOLD is sent from his terminal (FIG. 3, top), it being assumed in this example that this hold message HOLD is sent on the call identification 2.
  • FIWU of the fixed part FP there is a list LIS, i.e. a memory available.
  • LIS i.e. a memory available.
  • the DECT intermediate system IS transmits it to the fixed part FP, which can examine the message, but currently does not have to. In any case, it sends the hold message to the network NE, which now carries out the corresponding control functions and, for example, acknowledges the message positively with a hold confirmation HOLD ACK.
  • the fixed part FP now determines that the call identification 2 is on hold and marks it in its List LIS this call identification 2 under terminal address TEI 1 (on the network side) with a marking X.
  • the HOLD ACK hold confirmation goes to subscriber TE 1 via the DECT intermediate system. It could of course also be that the call or the function is rejected because e.g. the line feature is not currently working, etc. In this case, instead of a stop confirmation, a stop refusal would occur and the connection would not go to "hold".
  • DECT intermediate system IS can keep the connection. However, a new connection could also be opened for each subsequent call. built and then a new DECT channel can be assigned. However, it is usually more advantageous to keep the existing DECT connection, to wait for the subsequent call and to check whether it still has the same identifier of the transmission service or a different one. If the same identifier of the transmission service is available, the DECT channel can be used again, if there is another, the channel must be modified or another channel established. In most cases, the identifier of the transmission service will not change, but a change is not excluded.
  • the connection was put on hold, and a PC (computer) would call the third party (e.g. under TEI 1, CR 1, BC 3), you would have a data connection that is not a problem in the ISDN system , since its B channel can support both, namely voice or data connection.
  • the DECT intermediate system would now determine that the held channel is suitable for the voice connection, but not for the data connection. In this case, however, a channel for the data connection can be set up and the channel for the voice connection can be removed. However, the connection as a whole is maintained.
  • FIG. 3 The lower part of FIG. 3 now relates to the case where the subscriber TE A has completed his query and wants to reactivate the original connection. Then a downshift message RETR (“RETRIEVE”) on the call identification CR 2 is sent from the terminal TE A to the network.
  • RETRIEVE downshift message
  • a connection was also held for the TEI 1 under the call identification 3 in the list LIS, ie, one could also switch back the call “No. 3”, for example.
  • it is crucial that the call identification that is intended is used in the downshift.
  • This message again runs through the DECT intermediate system IS to the network NE, the network confirms 1 1 1 ß £ 4-1 ß 1 TJ 1 ß SH

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Data Exchanges In Wide-Area Networks (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Communication Control (AREA)

Abstract

L'invention concerne un procédé pour établir une communication dans un réseau ISDN (NE) à l'aide d'au moins un système intermédiaire DECT (IS) dans lequel pour chaque communication, le triplet adresse du terminal (TEI 1)-identification de l'appel (CR 2)-code du service de transmission (BC 1) issu du protocole des communications est mémorisé dans une liste (LIS). Dès l'arrivée de la confirmation (HOLD ACK) pour la mise en garde d'une communication, ce triplet (TEI 1-CR 2-BC 1) est muni d'une identification. Dès l'arrivée d'une confirmation (RETR ACK) de la réactivation d'une communication, l'identification de l'appel (CR 2) repérée est recherchée sous la même adresse du terminal (TEI 1) dans la liste, de sorte que la communication DECT obtenue correspond au code du service de transmission (BC 1) du triplet identifié (TEI 1-CR 2-BC 1), et finalement l'identification (X) est effacée à nouveau.
EP98931981A 1997-04-24 1998-04-22 Reseau isdn a systeme intermediaire dect Withdrawn EP0978218A2 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19717365 1997-04-24
DE19717365A DE19717365C1 (de) 1997-04-24 1997-04-24 ISDN-Netz mit DECT-Zwischensystem
PCT/DE1998/001131 WO1998048589A2 (fr) 1997-04-24 1998-04-22 Reseau isdn a systeme intermediaire dect

Publications (1)

Publication Number Publication Date
EP0978218A2 true EP0978218A2 (fr) 2000-02-09

Family

ID=7827646

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98931981A Withdrawn EP0978218A2 (fr) 1997-04-24 1998-04-22 Reseau isdn a systeme intermediaire dect

Country Status (4)

Country Link
US (1) US6567412B1 (fr)
EP (1) EP0978218A2 (fr)
DE (1) DE19717365C1 (fr)
WO (1) WO1998048589A2 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7266591B1 (en) * 2001-12-17 2007-09-04 Verizon Business Global Llc Providing content delivery during a call hold condition

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4741026A (en) * 1986-05-29 1988-04-26 American Telephone And Telegraph Company, At&T Bell Laboratories Message signaling arrangement between a switching system and user terminals
DE4114554A1 (de) * 1991-05-04 1992-11-05 Robur Werke Gmbh I A Fahrerhaus fuer nutzkraftwagen mit einer zweiten sitzreihe
EP0635185A1 (fr) * 1992-04-09 1995-01-25 Siemens Aktiengesellschaft Procede de structuration d'un format de champ b en norme dect
DE4414554A1 (de) 1994-04-22 1995-11-02 Triple I Gmbh Fuer Tech Kommun Verfahren und Anordnung zur Bearbeitung von Signalen in Telekommunikationsendgeräten
DE19502641C2 (de) * 1995-01-20 1999-01-14 Deutsche Telephonwerk Kabel Anordnung zur Netzabschlußtechnik für öffentliche, stationäre Telekommunikationsnetze
SE514244C2 (sv) * 1995-06-06 2001-01-29 Telia Ab Förbättringar av eller avseende trådlös telefoni
US6041103A (en) * 1996-04-16 2000-03-21 Lucent Technologies, Inc. Interactive call identification
US5938735A (en) * 1997-10-21 1999-08-17 Ricoh Company, Ltd. System for establishing optimized ISDN communication by identifying common communication attributes of destination and source terminals prior to establishing communication link therebetween

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO9848589A2 *

Also Published As

Publication number Publication date
US6567412B1 (en) 2003-05-20
WO1998048589A2 (fr) 1998-10-29
DE19717365C1 (de) 1998-11-26
WO1998048589A3 (fr) 1999-03-11

Similar Documents

Publication Publication Date Title
DE4417779C1 (de) Mobilfunksystem
DE4424896C2 (de) Verfahren zum Errichten und Abrufen eines Telefonbenutzerprofils
DE69732519T2 (de) Mobilitätsverwaltungssystem in einem persönlichen Kommunikationssystem
DE69529589T2 (de) Intelligente schnurlose Signalisierungsschicht für Telekommunikationsnetz
DE69413149T2 (de) Verfahren zur telefonverbindungsherstellung in einem telefonsystem
DE69316648T2 (de) Verfahren zur verbindungsherstellung zwischen kommunikationsgeräten
DE69531052T2 (de) Telekommunikationsverfahren und eine zu seiner Durchführung geeignete Vorrichtung
DE69513322T2 (de) Zellulares Festendgerät
DE19520632C2 (de) Verfahren und Anordnung zum Rufen eines Teilnehmers über ein Mobilfunknetz
DE19811825B4 (de) Kommunikationssystem mit einer begrenzten Anzahl von Kommunikationskanälen
DE69324989T2 (de) Verbindungssteuerverfahren für persönliche Kommunikationen
DE2848931C2 (de) Schaltungsanordnung für Teilnehmerstationen
DE69508102T2 (de) Verfahren zum deregistrieren eines an einem terminal mittels registrierungsdaten registrierten benutzers und fernmeldesystem
EP0794681B1 (fr) Procédé pour l'établissement automatique de connexions de parole et/ou données et centrale correspondante
DE60127450T2 (de) Verfahren zum einrichten von kommunikationswegen zwischen zugriffspunkten eines vermittlungssystems und das verfahren implementierendes vermittlungssystem
EP0535601B1 (fr) Procédé pour l'établissement de connexions de conférence dans un système de communication à commande par processeur
WO1998048589A2 (fr) Reseau isdn a systeme intermediaire dect
EP0720399B1 (fr) Méthode de commande du mode de fonctionnement d'un appareil mobile associé à un système de communication à commande programmée
EP1037452B1 (fr) Système et procédé pour la connection d'un appel vers plusieurs utilisateurs en parallèle
EP0833531A2 (fr) Système de radio mobile pour le traitement des appels de groupe
DE19531613C1 (de) Verfahren zur Herstellung von Fernmeldeverbindungen
DE19536221A1 (de) Verfahren und Schaltungsanordnung für Fernmeldeermittlungsanlagen, insbesondere Fernsprechvermittlungsanlagen
DE4411119C1 (de) Digitales, in Funkzellen aufgebautes Mobilfunksystem
EP0859530B1 (fr) Intégration des fonctions de gestion de mobilité d'un système sans fil dans des réseaux de communications filaires
DE4232862C1 (de) Verfahren für die Auswertung betriebstechnischer Dateninformationen bei einer programmgesteuerten Nebenstellenanlage mit daran angeschlossenen Mobilendgeräten

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 19991019

AK Designated contracting states

Kind code of ref document: A2

Designated state(s): DE FR GB IT

GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 20040303