Arrangement for the synchronization of the radio transmission in a radiotelephone subscriber connection network

• US 6,009,085 A
• Filed: 07/16/1996
• Issued: 12/28/1999
• Est. Priority Date: 07/21/1995
• Status: Expired due to Term

• Current Assignee: Transpacific Silica LLC (Intellectual Ventures LLC)
• Original Assignee: Siemens AG
• Inventors: Lechner, Robert
• Primary Examiner(s): TON, DANG T
• Application Number:
  US08/680,928
• Time in Patent Office: 1,260 Days
• Field of Search: 370/324, 370/312, 370/318, 370/326, 370/328, 370/329, 370/337, 370/347, 370/349, 370/350, 370/507, 370/503, 370/310, 370/314, 370/321, 370/316, 370/341, 370/345, 370/442 , 370/465, 370/455, 375/355, 375/356, 455/3.2, 455/5.1, 455/427, 455/422, 455/455, 455/456, 455/515, 455/502, 455/525
• US Class Current: 370/324
• CPC Class Codes: H04B 7/2693 Centralised synchronisation, i.e. using external universal time reference, e.g. by using a global positioning system [GPS] or by distributing time reference over the wireline network

Abstract

The arrangement synchronizes the radio transmission in a radiotelephone subscriber connection network. The connection network for the subscriber connection to the telecommunication exchange (LE) is divided into a central control unit (RDU), at least one concentrating, decentralized unit (RBC), as well as a plurality of base stations (RBS) between which and subscriber stations the radio transmission to be synchronized occurs. The decentralized units contain receivers (GPS-E) for reference signals of a radio-locating system, for example GPS, beamed out by satellites and derive time signals therefrom for the time-division multiplex radio frame of the base stations that they transmit thereto via a U-interface (U).

Claims

1. An arrangement for synchronization of radio information transmission in a radiotelephone subscriber connection network for connection to a telecommunications exchange that is composed of a central unit for controlling of a radiotelephone system of the connection network, at least one decentralized concentrating unit, and a plurality of base stations connected to said at least one decentralized unit via a U-interface, radio transmission ensuing between said base stations and subscriber stations, comprising:

decentralized units having receivers for receiving reference signals of a radio-locating system beamed out by satellites;

the decentralized units having function units for deriving time signals from the reference signals for time-division multiplex frames of the base stations that the decentralized units send to the base stations via the U-interface.

2. The arrangement according to claim 1, wherein the radio-locating system is a global positioning system.

3. The arrangement according to claim 1, wherein the receivers of the decentralized units have matching circuits for coarse adjustment of a time offset for a starting point in time of the time-division multiplex radio frames;

and wherein the base stations have matching circuits for fine adjustment of said time offset.

4. The arrangement according to claim 1, wherein the receivers of the decentralized unit also derive time signals for assemblies contained therein from the received reference signal of the radio-locating system.

5. A radiotelephone subscriber connection network for synchronization of radio information transmission to a telecommunications exchange, comprising:

a central unit for controlling a radiotelephone system;

at least one decentralized concentrating unit;

a plurality of base stations connected to said at least one decentralized unit via a U-interface;

subscriber stations with radio transmission ensuing between said base stations and subscriber stations;

decentralized units having receivers for receiving reference signals of a global positioning system beamed out by satellites;

the decentralized units having function units for deriving time signals from the reference signals for time-division multiplex frames of the base stations that the decentralized units send to the base stations via the U-interface.

6. The radiotelephone subscriber connection network according to claim 5, wherein the receivers of the decentralized units have matching circuits for coarse adjustment of a time offset for a starting point in time of the time-division multiplex radio frames;

and wherein the base stations have matching circuits for fine adjustment of said time offset.

7. The radiotelephone subscriber connection network according to claim 5, wherein the receivers of the decentralized equipment also derive time signals for assemblies contained therein from the received reference signal of the radio-locating system.

8. A radiotelephone subscriber connection network for synchronization of radio information transmission to a telecommunications exchange, comprising:

a central unit for controlling a radiotelephone system;

at least one decentralized concentrating unit;

a plurality of base stations connected to said at least one decentralized unit via a U-interface;

subscriber stations with radio transmission ensuing between said base stations and subscriber stations;

decentralized units having receivers for receiving reference signals of a radio-locating system beamed out by satellites;

the decentralized units having function units for deriving time signals from the reference signals for time-division multiplex frames of the base stations that the decentralized units send to the base stations via the U-interface;

the receivers of the decentralized units having matching circuits for coarse adjustment of a time offset for a starting point in time of the time-division multiplex radio frames; and

the base stations have matching circuits for fine adjustment of said time offset.

9. The radiotelephone subscriber connection network according to claim 8, wherein the radio-locating system is a global positioning system.

10. The radiotelephone subscriber connection network according to claim 8, wherein the receivers of the decentralized equipment also derive time signals for assemblies contained therein from the received reference signal of the radio-locating system.