WO1996038988A1

WO1996038988A1 - Universal mobile telecommunication system

Info

Publication number: WO1996038988A1
Application number: PCT/DE1996/000929
Authority: WO
Inventors: Uwe Sydon; Wolfgang Strzeletz
Original assignee: Siemens Aktiengesellschaft
Priority date: 1995-05-31
Filing date: 1996-05-29
Publication date: 1996-12-05
Also published as: AU5810396A; DE19520024A1

Abstract

In order to be able to connect diverse line-bound telecommunication terminals (TKEG), e.g. telephones, video phones, facsimile units, modems, etc., over relatively large distances in a wireless manner to a telecommunication network (TKN), e.g. PSTN, PTN and ISDN networks (expanded 'radio in the loop'), a DECT-specific relay and repeater station (RS) with a line interface (LSS2) for connecting the telecommunication terminals (TKEG) is preferably integrated into a DECT-specific cordless telecommunication system (FT, PT) such that both external and internal telecommunication connections to the line-bound telecommunication terminal (TKEG) are possible.

Description

description

Universal mobile telecommunication system

The invention relates to a universal mobile telecommunication system according to the preamble of claim 1.

Modern mobile telecommunications is characterized by universal (temporal and local) mobility, in which each communication subscriber can be reached anywhere and at any time. With this universal mobility, a distinction is made between device-related mobility via air interfaces and personal mobility via air and line interfaces. The inclusion of both aspects in a universal mobile communication leads to an "Advanced Mobility" with a universal mobile telecommunication system (UMTS = Universal Mobil Telecommunication System) in connection with a universal personal telecommunication (UPT = Universal Personal Telecommunication).

A universal mobile telecommunication system is known from WO 95/05040, in which, in the course of the further development of mobile telecommunication, a cordless telecommunication system that is individual to the picocell is expanded by installing a relay or repeater station on communication cells with different cell radii (universal) can be. The scenario "Universal Mobile Communication - Advanced Mobility" is shown in relation to the cell radius for various application examples of mobile telecommunications (cordless, mobile radio and satellite telecommunications) (FIGS. 3 to 8) and described (description of FIGS. 3) to 7). In this scenario, the relay or repeater station can be used both for picocell-specific mobile telecommunications and for the higher-level cell-specific mobile telecommunications (eg micro, macro and hypercell-specific mobile telecommunications). In the course of the further development of personal mobility via air and line interfaces - which is to be considered in more detail for the present invention - EP-0 630 140 A2 is a cordless telephone with a fixed part connected to the telephone network and at least one with the Fixed part known in wirelessly connected handset, in which at least one handset uses an additional network-inverse interface as a cordless telephone connection unit (TAE socket) for the connection of any wire-bound telecommunication terminals (e.g. telephones, BTX) , Modem, fax, answering machine etc.) is trained. The known cordless telephone is thus in the broader sense a universal mobile telecommunication system in which the aspect of personal mobility via the air and line interface mentioned at the beginning has been taken into account. The basic idea pursued with personal mobility essentially consists in connecting today to a telecommunications network (eg public telephone network) (PSTN = Public Switched Telephone Network) via line connections (eg copper wires, coax and fiber optic cables); Integrated Services Digital Network (ISDN) network; private telephone network (PTN = Private Telephone Network) etc. - Connect connected subscribers to the telecommunication network via radio connections (e.g. RLL = radio in the local loop).

From DE-33 37 648 AI a radio network with a variety of mobile stations is known. This radio network, which preferably operates in the mm-wave frequency range, contains mobile stations which can simultaneously connect one or more of their own end users according to the synchronous time-division multiplex method and code spread via digitally transmitting, connection-oriented, switched radio channels to end users of other mobile stations , wherein each station can act as a switch (relay) between pair-communicating mobile stations and in its simultaneously fulfilling 3 baren function as a mobile station and relay can carry out the communication of several own terminals with terminals of other mobile stations and the switching of a large number of time-division multiplex channels of neighboring mobile stations. The radio network is also designed in such a way that the organization of all communication and administration functions by the mobile stations is carried out completely decentrally, each mobile station independently providing all the necessary data about the network status, the connectivity of the mobile stations and the possible routes to all other mobile stations Addresses of the subscribers, the availability and operating states of the individual connections, etc. are managed, actively determined when required and passed on to other mobile stations on request, and a connection to the next one in Zielrich¬ if required by a separate end subscriber or a neighboring station direction of the connection lying neighboring station switches according to the channel-switched principle.

The object on which the invention is based is to specify a universal mobile telecommunications system in which various line-bound telecommunication terminals (e.g. telephones, video telephones, facsimile machines, modems etc.) and radio transmitters / radio receivers are connected wirelessly to a telecommunication network (e.g. B. PSTN, PTN and ISDN network) can be connected universally.

This object is achieved on the basis of the universal mobile telecommunications system defined in the preamble of patent claim 1 by the features specified in the characterizing part of patent claim 1.

By integrating a relay or repeater station with a line interface - for example known from EP-0 630 140 A2 - for line-bound telecommunication terminals in a radio telecommunication system for the wireless transmission of messages (radio messages) - e.g. B. one according to the DECT standard (Digital European Cordless Telecommunications; see. Telecommunications Electronics 42 (Jan./Feb. 1992), No.l, Berlin; U. Pilger: "Structure of the DECT standard"; Pages 23 to 29) constructed cordless telecommunication system or one according to the GSM standard (Global System for Mobile Communication; cf. Informatik Spektrum 14 (Jun. 1991), No.3, Berlin; A. Mann: "Der GSM standard - basis for digital European mobile radio networks "; pages 137 to 152) mobile radio telecommunication system - geographic regions, which can only be developed with great financial effort, for example with regard to the connection to an existing telecommunication network, can be easily accessed Be operated inexpensively (extension of the "Radio in the Local Loop" concept).

To various line-bound telecommunication terminals

(e.g. telephones, videophones, facsimile machines, modems etc. - to be able to connect wirelessly to a telecommunications network (e.g. PSTN, PTN and ISDN network) over extended distances (extended "radio in the local loop ") a DECT-specific relay or repeater station with the line interface for connecting the telecommunication terminals is preferably integrated into the DECT-specific cordless telecommunication system in such a way that both external and internal telecommunication connections with the line-bound Te - Communication terminal are possible.

In addition, with this DECT-specific cordless telecommunications system it is particularly advantageous that at least one cordless handset is capable of telecommunications with the relay or repeater station and / or with a base station. As a result, both external connections to a remote subscriber device and - in two ways ((i): via relay station and base station and (ii): via the relay station) - internal connections can be made from the line-bound telecommunications terminal Cordless handset can be built. According to claim 2, it is advantageous if the repeater station has a directional antenna for bridging long ranges between the existing telecommunications network and the geographical region which is difficult to develop. For example, the DECT standard leaves directional antennas with a

Directional characteristic up to 22 dBi too (cf. Communications Electronics 42 (Jan./Feb. 1992), No.l, Berlin; U.Pilger: "Structure of the DECT standard"; page 25).

Further advantageous developments of the invention are specified in the subclaims.

An embodiment of the invention is explained with reference to the figure.

This figure shows an FTKS radio telecommunication system in the form of a DECT-specific cordless telecommunication system designed for larger transmission ranges (for example up to 2200 m) of radio messages. The cordless telecommunications system FTKS contains, for example, a base station FT (fixed termination), a handset PT (portable termination) and a relay station RS designed as a DECT repeater (cf. input paper to ETSI RES3R, May 19, 1994 fro Ericsson incorporating) the repeater in the DECT standard; addition to ETS 300 175-3, Annex J: Repeater Operation).

The basic structure of the base station FT and the mobile part PT can be found in the publications ((l): WO 94/10812 (FIG. 1 with the associated description); (2): Siemens Components 31 (1993), No.6; p Althammer and D. Brückmann:

"Highly optimized IC's for DECT cordless phones", pages 215 to 218; (3): telcom report 16 (1993), No.l, JH Koch: "Digital convenience for cordless telecommunications - DECT standard opens up new areas of use", pages 26 and 27). The present base station FT differs essentially from the base stations known from the documents (1) to (3) by the directional antenna RA additionally required for the directional radio transmission and the associated radio part (transmitter / receiver).

As an alternative to the base station FT shown in the figure, it is also possible to operate the base station FT as an antenna diversity base station (cf. e.g. WO 94/10764, WO 94/10763 and WO 94/10762).

The present mobile part PT is able to establish and / or maintain a first cordless radio connection SFV1 to the relay station RS and a second cordless radio connection SFV2 to the base station FT. In the case of the first

Cordless radio connection SFV1 to the relay station RS, the relay station RS assumes the function of a cordless base station. The cordless radio connections SFV1, SFV2 to the base station FT or relay station RS are possible, for example, up to a range of approximately 200 m (outdoors).

So that the handset PT can maintain a radio connection at all, it must first be registered and registered with the base station FT or the relay station RS. How, for example, a mobile part PT can be registered and registered with a base station FT, is described in WO 94/10785.

The relay station RS and the base station FT are capable of telecommunication via a radio link RFV. For this directional radio link RFV, both the base station FT and the relay station RS have a directional antenna RA. In this way, an air interface to the base station FT is formed at the relay station RS and an air interface to the relay station RS is formed at the base station FT. In comparison to the wireless radio connections SFVl, SFV2, the directional RFV radio link, for example, radio messages up to a range of approximately 2000 m are transmitted. The relay station RS takes on the function of a cordless handset for this radio link RFV. Thus, for example, the above-mentioned radio transmission range of approx. 2200 m can be achieved from the mobile part PT via the first cordless radio connection SFV1 to the relay station RS and from there via the directional radio link RFV to the base station FT. As already mentioned, the relay station RS takes on the one hand the function of the cordless base station and, on the other hand, the function of the cordless handset within the cordless telecommunication system FTKS.

As an alternative to the DECT-specific cordless telecommunications system FTKS shown, it is also possible that

(a) several mobile telephones PT are registered and registered with the base station FT and / or the relay station RS and / or

(b) a plurality of relay stations RS are registered and registered with the base station FT (according to the DECT standard, up to 12 mobile parts PT or relay stations RS can communicate bidirectionally with a base station FT) and / or

(c) multiple base stations FT are provided.

If the cordless telecommunications system FTKS according to (c) contains several base stations FT, the cordless telecommunications system FTKS is thereby expanded to a cellular telecommunications system.

The cordless telecommunications system FTKS described above is integrated in the figure in a universal mobile telecommunications system UMTS to improve personal mobility by the base station FT using a first line interface LSS1 and a first telecommunications line TKL1 with a telecommunications network TKN and the relay station RS via a second line cut place LSS2 and a second telecommunications line TKL2 are connected to a telecommunications terminal TKEG. The telecommunications network TKN can be designed, for example, as a public telephone network (PSTN), private telephone network (PTN), ISDN network, mobile radio network or satellite radio network. In analogy to the telecommunications network, the line-bound telecommunications terminal TKEG shown in the figure also stands for a multitude of possible uses. For example, the line-bound telecommunications terminal TKEG can be designed as a telephone, BTX device, fax device, modem, answering machine, videophone, personal computer etc.

Assuming that the telecommunication terminal TKEG is designed as a line-bound telephone, an operator on this telephone (A subscriber) can telephone with a remote B subscriber via the relay station RS, the radio link RFV to the base station FT and the telecommunication network TKN (External connection). In this case, the relay station RS again takes on the function of a cordless handset with regard to cordless telecommunications. For this type of telecommunications and in relation to the Telekommunika¬ tion terminal TKEG is the radio telecommunications system FTKS consisting of relay or repeater station RS, and Ba ^'sissta- tion FT, a wireless telecommunications connection unit

(TAE box) in the sense of the concept "Radio in the Local Loop" mentioned at the beginning.

Alternatively, the operator of the TKEG telecommunications terminal mentioned above can also set up an internal connection via the relay station RS to the handset PT. In this case, the relay station RS again takes on the function of a cordless base station with regard to cordless telecommunications.

Claims

claims

1. Universal mobile telecommunication system with a radio telecommunication system (FTKS) for the wireless transmission of messages, the a) at least one first radio transceiver (FT) and at least one telecommunication capable with the first radio transceiver (FT), second radio transmitter - / Radio receiving device (RS), b) has a first line interface (LSSl) to a telecommunications network (TKN), which is assigned to the first radio transmitting / receiving device (FT) or at least one of the first radio transmitting / receiving devices (FT) net), c) has a second line interface (LSS2) for connecting line-bound telecommunication terminals (TKEG) to the telecommunication network (TKN), which has the second radio transmitter / radio receiver device (RS) or at least one of the second radio transmitter / radio receiver devices. lines (RS) is assigned, d) the second radio transmitter / radio receiver device (RS) as a relay or Repeater station is formed, characterized in that e) the radio telecommunications system (FTKS) has at least one radio transceiver (PT) which is connected to the first radio transceiver (FT) and / or to the second radio transceiver ( RS) can be connected by telecommunications.

2. Universal mobile telecommunication system according to claim 1, characterized in that the relay or repeater station (RS) for the radio connection with the first radio transmission / reception device (FT) has a directional antenna (RA).

3rd Universal mobile telecommunications system according to claim 1 or .2, characterized in that the radio tele- Communication system (FTKS) is designed as a cordless telecommunications system, in which the first radio transmitter / radio receiver (FT) as a cordless base station, the second radio transmitter / radio receiver (RS) as a cordless repeater station and the radio transmitter / radio receiver (PT ) are designed as a cordless handset.

4. Universal mobile telecommunications system according to claim 3, characterized in that the cordless telecommunications system is designed for the transmission of messages according to the DECT standard.

5. Universal mobile telecommunications system according to one of claims 1 to 4, characterized in that the repeater station (RS) is designed such that it has the function of a cordless for wireless telecommunications with the first radio transceiver (FT). Mobile part and for wireless telecommunications with the radio transceiver (PT) takes over the function of a cordless base station.

6. Universal mobile telecommunications system according to claim 1 or 2, characterized in that the Funktele¬ communication system (FTKS) is designed as a mobile telecommunications system, in which the first radio transmission

/ Radio receiver (FT) as a mobile radio base station, the second radio transmitter / radio receiver (RS) as a mobile radio repeater station and the radio transmitter / radio receiver (PT) are designed as a mobile radio handset.

7. Universal mobile telecommunication system according to claim 6, characterized in that the mobile tele-communication system is designed for the transmission of messages according to the GSM standard.

8. Universal mobile telecommunications system according to one of claims 1 to 7, characterized in that the wired telecommunication terminal is designed as a facsimile device, telephone with or without answering machine function, video or video telephone, telecommunication-capable personal computer etc.

9. Universal mobile telecommunications system according to one of claims 1 to 8, characterized in that the telecommunications network is designed as a public telephone network (PSTN), private telephone network (PTN), ISDN network, cellular network, satellite radio network, etc.

10. Universal mobile telecommunications system according to one of claims 1 to 9, characterized in that the wirelessly transmitted messages (radio messages) represent spoken words, written words and / or images.