Telecommunications – Radiotelephone system – Zoned or cellular telephone system
Patent
1997-04-01
1999-11-16
Le, Thanh Cong
Telecommunications
Radiotelephone system
Zoned or cellular telephone system
455466, H04B 726
Patent
active
059873230
DESCRIPTION:
BRIEF SUMMARY
FIELD OF THE INVENTION
The present invention relates to a method for starting a short message transmission in a cellular communication network, a corresponding cellular communication system, and a cellular communication system subscriber location register. In this method, the subscriber location register stores information based on the fact that at least one short message service center stores short messages to be transmitted to a subscriber, to whom these messages cannot be transmitted for the time being, and the subscriber location register of the subscriber transmits to the at least one short message service center, a short message transmission starting message, when it is again possible to transmit short messages to the subscriber.
BACKGROUND OF THE INVENTION
Today, different cellular communication or mobile telephone systems are used and planned in which the geographical area covered by a system is divided into smaller separate radio areas, i.e., cells, so that when located in a cell, a radio phone or a mobile phone communicates with the fixed network via the fixed radio station located in the cell. The mobile phones included in the system may freely move within the system area from a cell into another. One of these systems is the digital mobile phone system GSM (Global System for Mobiles).
As to cellular communication networks, it is known practice to transmit short messages via a short message service center separate from the cellular communication network. One of these systems for transmitting and forwarding short messages is described in ETSI GSM system recommendation "GSM 03.40, February 1992, Technical Realization of Short Message Services Point to Point, ETSI/PT". It describes the connection of a short message service center to the mobile exchange of a cellular communication network and the operation of this short message service center when the center transmits and forwards short messages from outside the cellular communication network and from a cellular communication network subscriber (subscriber A) to another network subscriber (subscriber B), or to a means of communication which is capable of receiving and/or transmitting short messages and which is located outside the network.
When a short message service center attempts to transmit a short message to a subscriber B. and the subscriber B is not reachable, a Messages-Waiting-Data-List according to GSM recommendation 03.40, i.e., an MWD list, is established in the home location register, which stores a list, subscriber B-specific, of the addresses of those short message service centers which store short messages to be delivered to subscribers B. Accordingly, when subscriber B registers in the network, i.e., it is possible to transmit a short message to the mobile phone of the subscriber B since the visitor location register in the area which subscriber B registers itself transmits a notification of the arrival of the subscriber B in the network to the home location register of the subscriber B. The home location register of the subscriber B, i.e., the subscriber location register, thus starts to transmit notifications, i.e., short message transmission starting messages, or, Alert messages (Alert), to the short message service centers presented in the Messages-Waiting-Data-List of the subscriber. The starting messages inform the short message service centers that subscriber B has become active in the cellular communication network area and that it is worth attempting to transmit a short message to the mobile phone of subscriber B. A situation of this type may occur, for instance, when the subscriber has switched off her mobile phone for the night and switches it on in the morning, or correspondingly, if the subscriber uses a mobile phone at work and switches on her mobile phone at the beginning of working hours.
A typical problem of prior art solutions is that the transmission capacity of short messages from short message service centers to a subscriber is very restricted. The transmission capacity on the radio path is only 10-100 bytes
REFERENCES:
patent: 5794142 (1998-08-01), Vanttila et al.
patent: 5806000 (1998-09-01), Vo et al.
ETSI-GSM Technical Specification, GSM 03.40 Version 3.5.0, European digital cellular telecommunication system (phase 1 ); "Technical Realization of the Short Message Service--Point-to Point", 1992, pp. 13-15.
ITG-Fachbericht 124, Informationstechnische Gesellschaft Fachtagung, Mobile Kommunikation,Vortrage der ITG-Fachtagung, Sep. 27-29, 1993 in Neu-Ulm, vde-verlag gmbh, Berlin, Hientz, Michael et al : "Der short message service--ein neuer dienst der digitalen mobilkommunikation " pp. 517-526.
ETSI/TC GSM, "Recommendation GSM 01.02, General Description of a GSM PLMN", Mar. 1990.
ETSI/TC GSM, "Report GSM 11.30, Mobile services Switching Centre", Jan. 1990.
ETSI/TC GSM, "Report GSM 11.31, Home Location Register Specification", Jan. 1990.
ESTI/TC GSM, "Report GSM 11.32, Visitor Location Register Specification", Jan. 1990.
ETSI TC-SMG, European digital cellular telecommunications system (Phase 2); Technical realization of the short Message Service (SMS) Point to Point (PP) (GSM 03.40), Oct. 1993.
Cong Le Thanh
Nokia Telecommunications Oy
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