AU681970B2 - Base station system for a digital cellular mobile radiotelephone network - Google Patents

Base station system for a digital cellular mobile radiotelephone network Download PDF

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Publication number
AU681970B2
AU681970B2 AU26690/95A AU2669095A AU681970B2 AU 681970 B2 AU681970 B2 AU 681970B2 AU 26690/95 A AU26690/95 A AU 26690/95A AU 2669095 A AU2669095 A AU 2669095A AU 681970 B2 AU681970 B2 AU 681970B2
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AU
Australia
Prior art keywords
base station
transmission
reception devices
transmission reception
bsc
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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.)
Ceased
Application number
AU26690/95A
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AU2669095A (en
Inventor
Norbert Budnik
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Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
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Filing date
Publication date
Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of AU2669095A publication Critical patent/AU2669095A/en
Application granted granted Critical
Publication of AU681970B2 publication Critical patent/AU681970B2/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • H04W88/08—Access point devices
    • H04W88/085—Access point devices with remote components
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/24—Radio transmission systems, i.e. using radiation field for communication between two or more posts
    • H04B7/26—Radio transmission systems, i.e. using radiation field for communication between two or more posts at least one of which is mobile
    • H04B7/2625—Radio transmission systems, i.e. using radiation field for communication between two or more posts at least one of which is mobile using common wave

Description

WO 96/02116 PCT/DE9>5/00812 Description Base Station for a Digital Cellular Mobile Radiotelephone Network The present invention concerns a base station for a digital cellular mobile radiotelephone network in which transmission reception devices are fitted in radio cells and, in each case, several transmission reception devices are connected to base station control unit.
A base station system of the kind as is used, eg. in digital cellular mobile radiotelephone networks according to GSM standards follows DE 40 08 165 Al or DE 42 15 685 Al. As is also described by M. Bbhm: Mobile Radiotelephone Systems CD 900 (Part 1) in Mikrowellen Magazin, Vol. 11, No. 1, 1985, pp.67-70, the entire area of radio communications is divided into radio cells and a fixed station is fixed in every radio cell.
For each of the radio cells, a fixed, specified number of TDM time slots are provided for the exchange of data between the fixed station and the mobile subscriber in the radio cell.
In areas with higher traffic density, small radio cells are necessary while the radio cells can occupy larger areas where traffic density decreases. As varying degrees of traffic density can occur in subdivisions of a large radio cell, each radio cell is, according to the publication named, sectored into several subcells, which are all supplied chronologically in succession by a fixed station. A flexible adaption to the various traffic densities in the individual subcells takes place here by means of a corresponding, numerical allocation of the TDM time slot available for a radio cell to the individual subcells.
According to DE 42 25 685 Al, an adaption of the size of the radio cell to the given traffic density takes place through the control of the transmitting power of the fixed stations.
The procedures for the adaption of the radio cells to the prevailing traffic density named are very limited in their variation possibilites.
The task forming the basis of the invention is to provide a base station of the type indicated in the introduction which can, with minimal expense, be adapted flexibly to local traffic densities.
WO 96/02116 PCT/DE95/008 12 2 According to the invention, this task will be solved by means of the characteristics of Claim 1. Further advantages of the invention are enumerated in the subclaims.
Because the fixed station s distributed over the entire radio communications area are constructed as transmission reception devices which have only to transform data to be transmitted into the high-frequency range and the rest of the signal processing occurs in the central base station control units, the circuit expense and, consequently, the cost of the transmission reception devices is reduced considerably, since all transmission reception devices can be similarly constructed. This measure, actually known from DE 40 08 165 Al, says much for the equipping of the radio communications area with a host of such similar transmission reception devices each covering a relatively small cell of only some hundreds of metres.
With the help of a example of a model in the diagram, the invention will now be described in more detail.
A section of a cellular mobile radiotelephone network is represented in the only figure of the diagram. It has usually at least one mobile switching centre MSC which assumes the switching between one or several fixed public or private networks PN and the mobile radiotelephone network. One or more base station control units BSC are combined with this mobile switching centre MSC onto which, in turn, several transmission reception devices SE5, distributed in the radio communications coverage area, are connected.
The transmission reception devices SE1. SE5 are reduced to a minimum number of signal processing functions and are all similarly constructed, making possible economical mass production. Only the processing of signals in the high-frequency range (eg.
modulation, demodulation, frequency transformation, transmission, reception etc.) are to occur in the transmission reception devices SE1... SE5. All other functions (eg. channel coding and decoding, multiplexing, demultiplexing, control of frequency jump procedures, monitoring, control and switching for the transmission reception devices etc.) are to be carried out by the base station control units BSC.
The transmission reception devices SE1... SE5 are arranged in such small distances from one another that the individual transmission reception device[s] form so fine a radio cell structure that the radio channel requirement can be covered even in the highest possible WO 96/02116 PCT/DE95/00812 3 traffic density and, beyond that, an optimal radio coverage in geographically adverse areas is guaranteed. Because of the small size of the radio cells, the transmission reception devices SE1. SE5 require only a relatively slight transmitter power.
Every transmission reception device SE1... SE5 is equipped with several (eg. four) various frequency channels allocated to the transmitters receivers.
The base station control unit BSC is able to separately supply each individual transmission reception device SE1... SE5 transmitter data. This selective operation is used when a large traffic density can be managed only with many small radio cells. Beside this, the base station control unit can switch any number of transmission reception devices SE1... connected to it in parallel. In this operating mode then, several transmission reception devices SE1... SE5 are supplied by the base station control unit with the same transmission data, and these parallel-connected transmission reception devices then send out the data simultaneously in the common wave operation.
As is shown in the diagram, the respective parallel-connected transmission reception devices supply a common radio cell, eg. the transmission reception devices SE1, SE2 the radio cell ZI1 or the transmission reception SE3, SE4 the radio cell Z2. The transmission reception device SE5 is in this example operated individually and forms a small radio cell Z3. The common wave operation thus offers the possibility of adapting the radio cell sizes to such an extent to the traffic density or the geographic possibilities that an optimal radio coverage is provided.
In the common wave operation, all parallel-connected transmission reception devices receive the same data. The base station control unit BSC can combine all these reception data originating from various transmission reception devices according to the space diversity principle.
Copper cable, optical fibre links or directional radio connections can be used as transmitting media between the transmission reception devices SE1I SE5 and the base station control unit BSC. It would be advantageous to install a point to multipoint transmission system.
i

Claims (4)

1. A base station system for a digital cellular mobile radiotelephone network, in which transmission reception devices are installed in the radio cells and several reception transmission devices are connected to a base station control unit respectively, characterised in that, via the base station control unit (BSC), the transmission reception devices connected to it SE5) are connectable in parallel in any combination, so that they transmit the same data issued by the base station control unit (BSC) in the common wave operation.
2. A base station system in accordance with Claim 1, characterised in that the transmission reception devices SE5) contain assemblies for the processing of signals in the high-frequency range exclusively.
3. A base station in accordance with Claims 1 or 2, characterised in that the transmission reception devices SE5) are each fitted with transmission reception devices to which several different frequency channels are allocated.
4. A base station in accordance with Claim 1, characterised in that the base station control units (BSC) process the transmission data to such an extent that only the modulation and translation of the transmission data into high-frequency transmission signals in the transmission reception devices is necessary. A base station system in accordance with Claim 1, characterised in that the transmission of the signals of the base station control units (BSC) to the transmission reception devices SE5) takes place via a point to multipoint transmission system. Translator's Note: The abbreviation SE throughout the text has been retained as in the original German as it appears this way in the diagram. The English is TRX.
AU26690/95A 1994-07-08 1995-06-22 Base station system for a digital cellular mobile radiotelephone network Ceased AU681970B2 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE4424016 1994-07-08
DE4424016A DE4424016A1 (en) 1994-07-08 1994-07-08 Base station system for a digital cellular cellular network
PCT/DE1995/000812 WO1996002116A1 (en) 1994-07-08 1995-06-22 Base station system for a digital cellular mobile radiotelephone network

Publications (2)

Publication Number Publication Date
AU2669095A AU2669095A (en) 1996-02-09
AU681970B2 true AU681970B2 (en) 1997-09-11

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Family Applications (1)

Application Number Title Priority Date Filing Date
AU26690/95A Ceased AU681970B2 (en) 1994-07-08 1995-06-22 Base station system for a digital cellular mobile radiotelephone network

Country Status (6)

Country Link
EP (1) EP0770314B1 (en)
JP (1) JPH10507882A (en)
AU (1) AU681970B2 (en)
DE (2) DE4424016A1 (en)
RU (1) RU2131642C1 (en)
WO (1) WO1996002116A1 (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH1066137A (en) * 1996-08-23 1998-03-06 Sony Corp Communication method and communication system
JP4151937B2 (en) 2000-09-18 2008-09-17 株式会社デンソー COMMUNICATION SYSTEM, COMMUNICATION METHOD, AND MOBILE STATION
RU2196388C2 (en) * 2000-10-24 2003-01-10 Аджалов Владимир Исфандеярович Method for building wireless access system for communication networks
CN100452900C (en) * 2004-03-30 2009-01-14 Ut斯达康通讯有限公司 Method of microcell management in mobile communication system using centralized base station

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0335846A1 (en) * 1988-02-29 1989-10-04 Telefonaktiebolaget L M Ericsson Cellular digital mobile radio system with plural base station transmitters, and method of transmitting information in such a system
EP0368673A1 (en) * 1988-11-11 1990-05-16 BRITISH TELECOMMUNICATIONS public limited company Communications system
WO1992013400A1 (en) * 1991-01-15 1992-08-06 Rogers Cable T.V. Limited Radiotelephony system

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4008165A1 (en) * 1990-02-01 1991-08-08 Standard Elektrik Lorenz Ag Cellular mobile radio system
DE4225685A1 (en) * 1992-08-04 1994-02-10 Philips Patentverwaltung Cellular mobile radio system
DE4310645A1 (en) * 1993-04-01 1994-10-06 Deutsche Aerospace Radio system for transmitting messages between at least one mobile station and n fixed base stations arranged along a route

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0335846A1 (en) * 1988-02-29 1989-10-04 Telefonaktiebolaget L M Ericsson Cellular digital mobile radio system with plural base station transmitters, and method of transmitting information in such a system
EP0368673A1 (en) * 1988-11-11 1990-05-16 BRITISH TELECOMMUNICATIONS public limited company Communications system
WO1992013400A1 (en) * 1991-01-15 1992-08-06 Rogers Cable T.V. Limited Radiotelephony system

Also Published As

Publication number Publication date
DE59504831D1 (en) 1999-02-25
EP0770314B1 (en) 1999-01-13
JPH10507882A (en) 1998-07-28
RU2131642C1 (en) 1999-06-10
AU2669095A (en) 1996-02-09
EP0770314A1 (en) 1997-05-02
DE4424016A1 (en) 1996-01-18
WO1996002116A1 (en) 1996-01-25

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MK14 Patent ceased section 143(a) (annual fees not paid) or expired