Method for operating a GSM mobile radio system

• US 7,079,855 B1
• Filed: 11/21/2000
• Issued: 07/18/2006
• Est. Priority Date: 11/22/1999
• Status: Expired due to Fees

• Current Assignee: Nokia Siemens Networks GmbH & Company KG (Nokia Corporation)
• Original Assignee: Siemens AG
• Inventors: Kunze, Holger, Loechel, Norbert, Senft, Andreas, Junker, Heiko
• Primary Examiner(s): Eng, George
• Assistant Examiner(s): NGUYEN, KHAI MINH
• Application Number:
  US10/130,702
• Time in Patent Office: 2,065 Days
• Field of Search: 455/426.1, 455/12.1, 455/422.1, 455/450, 455/456.2, 455/443, 455/436, 455/502, 455/509, 370/515, 370/519, 370328-338, 445/443
• US Class Current: 455/502
• 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 invention relates to a method for operating a GSM mobile radio system, according to which at least one transmitter, which is allocated to a reference time generator, emits a signal including information concerning a reference time. The signal including the aforementioned information is received by the base stations. Each base station then synchronizes time slots of communications channels with reference to the reference time, said channels being made available via a radio interface between each respective base station and its allocated subscriber station.

Claims

1. A method for operating a GSM mobile radio system, comprising:

managing radio channels for connection-oriented services by base stations;

providing radio channels for packet-oriented services by predefinable base stations;

emitting a signal including information concerning a reference time from at least one transmitter, which is allocated to a reference time generator;

receiving the signal including the information concerning the reference time by the predefinable base stations, which are allocated to radio cells in which packet-oriented services are available; and

synchronizing time slots of the radio channels for packet-oriented services, in each case independently with reference to the reference time, the radio channels provided for packet-oriented services via a radio interface between the relevant base station and the allocated subscriber stations, wherein for first carrier frequencies which communicate with the radio channels for connection-oriented services, a cell-related frequency repetition factor is selected which is higher than a cell-related frequency repetition factor for second carrier frequencies which communicate with the radio channels for packet-oriented services.

2. The method for operating a GSM mobile radio system as claimed in claim 1, wherein the predefinable base stations from a subset of the base stations.

3. The method for operating a GSM mobile radio system as claimed in claim 2, wherein the signal including the information concerning the reference time is emitted by a satellite allocated to the Global Positioning System.

4. The method for operating a GSM mobile radio system as claimed in claim 2, wherein the signal including the information concerning the reference time is emitted by a terrestrial time signal transmitter allocated to an atomic clock, and transit time differences are compensated by a correction value calculated for the relevant base station.

5. The method for operating a GSM mobile radio system as claimed in claim 2, wherein during transmission via a control channel provided for packet-oriented services within a predefined radio cell, no data are transmitted in the adjacent radio cells via channels which use the same carrier frequencies as the control channel provided for packet-oriented services.

6. The method for operating a GSM mobile radio system as claimed in claim 1, wherein the signal including the information concerning the reference time is emitted by a satellite allocated to the Global Positioning System.

7. The method for operating a GSM mobile radio system as claimed in claim 6, wherein during transmission via a control channel provided for packet-oriented services within a predefined radio cell, no data are transmitted in the adjacent radio cells via channels which use the same carrier frequencies as the control channel provided for packet-oriented services.

8. The method for operating a GSM mobile radio system as claimed in claim 1, wherein the signal including the information concerning the reference time is emitted by a terrestrial time signal transmitter allocated to an atomic clock, and transit time differences are compensated by a correction value calculated for the relevant base station.

9. The method for operating a GSM mobile radio system as claimed in claim 8, wherein during transmission via a control channel provided for packet-oriented services within a predefined radio cell, no data are transmitted in the adjacent radio cells via channels which use the same carrier frequencies as the control channel provided for packet-oriented services.

10. The method for operating a GSM mobile radio system as claimed in claim 1, wherein during transmission via a control channel provided for packet-oriented services within a predefined radio cell, no data are transmitted in the adjacent radio cells via channels which use the same carrier frequencies as the control channel provided for packet-oriented services.

11. The method for operating a GSM mobile radio system as claimed in claim 1, wherein during transmission via a control channel provided for packet-oriented services within a predefined radio cell, no data are transmitted in the adjacent radio cells via channels which use the same carrier frequencies as the control channel provided for packet-oriented services.

12. A method for operating a GSM mobile radio system, comprising:

managing radio channels for connection-oriented services by base stations;

providing radio channels for packet-oriented services by predefinable base stations;

emitting a signal including information concerning a reference time from at least one transmitter, which is allocated to a reference time generator;

receiving the signal including the information concerning the reference time by the predefinable base stations, which are allocated to radio cells in which packet-oriented services are available; and

synchronizing time slots of the radio channels for packet-oriented services, in each case independently with reference to the reference time, the radio channels provided for packet-oriented services via a radio interface between the relevant base station and the allocated subscriber stations, wherein

the predefinable base stations from a subset of the base stations, and

for first carrier frequencies which communicate with the radio channels for connection-oriented services, a cell-related frequency repetition factor is selected which is higher than a cell-related frequency repetition factor for second carrier frequencies which communicate with the radio channels for packet-oriented services.

13. A method for operating a GSM mobile radio system, comprising:

managing radio channels for connection-oriented services by base stations;

providing radio channels for packet-oriented services by predefinable base stations;

emitting a signal including information concerning a reference time from at least one transmitter, which is allocated to a reference time generator;

receiving the signal including the information concerning the reference time by the predefinable base stations, which are allocated to radio cells in which packet-oriented services are available; and

synchronizing time slots of the radio channels for packet-oriented services, in each case independently with reference to the reference time, the radio channels provided for packet-oriented services via a radio interface between the relevant base station and the allocated subscriber stations, wherein

the signal including the information concerning the reference time is emitted by a satellite allocated to the Global Positioning System, and

for first carrier frequencies which communicate with the radio channels for connection-oriented services, a cell-related frequency repetition factor is selected which is higher than a cell-related frequency repetition factor for second carrier frequencies which communicate with the radio channels for packet-oriented services.

14. A method for operating a GSM mobile radio system, comprising:

managing radio channels for connection-oriented services by base stations;

providing radio channels for packet-oriented services by predefinable base stations;

emitting a signal including information concerning a reference time from at least one transmitter, which is allocated to a reference time generator;

receiving the signal including the information concerning the reference time by the predefinable base stations, which are allocated to radio cells in which packet-oriented services are available; and

synchronizing time slots of the radio channels for packet-oriented services, in each case independently with reference to the reference time, the radio channels provided for packet-oriented services via a radio interface between the relevant base station and the allocated subscriber stations, wherein

the signal including the information concerning the reference time is emitted by a terrestrial time signal transmitter allocated to an atomic clock, and transit time differences are compensated by a correction value calculated for the relevant base station, and

for first carrier frequencies which communicate with the radio channels for connection-oriented services, a cell-related frequency repetition factor is selected which is higher than a cell-related frequency repetition factor for second carrier frequencies which communicate with the radio channels for packet-oriented services.

15. A system for operating a GSM mobile radio system, comprising:

radio channels for connection-oriented services managed by base stations;

radio channels for packet-oriented services provided by predefinable base stations;

a signal including information concerning a reference time is emitted from at least one transmitter, which is allocated to a reference time generator, wherein

the signal, including the information concerning the reference time, is received by the predefinable base stations, which are allocated to radio cells in which packet-oriented services are available, and

the base stations synchronize time slots of the radio channels for packet-oriented services, in each case independently with reference to the reference time, and the radio channels are provided for packet-oriented services via a radio interface between the relevant base station and the allocated subscriber stations, wherein for first carrier frequencies which communicate with the radio channels for connection-oriented services, a cell-related frequency repetition factor is selected which is higher than a cell-related frequency repetition factor for second carrier frequencies which communicate with the radio channels for packet-oriented services.