Controlling a subscriber station on a direct mode channel

• US 5,907,794 A
• Filed: 11/02/1995
• Issued: 05/25/1999
• Est. Priority Date: 03/03/1994
• Status: Expired due to Fees

• Current Assignee: EADS Secure Networks
• Original Assignee: Nokia Telecommunications Oy (Nokia Corporation)
• Inventors: Heiskari, Mika, Lehmusto, Mika
• Primary Examiner(s): Faile, Andrew I.
• Assistant Examiner(s): MOE, AUNG SOE
• Application Number:
  US08/545,726
• Time in Patent Office: 1,300 Days
• Field of Search: 455/11.1, 455/54.2, 455/54.1, 455/58.1, 455/33.1, 455/34.1, 455/15, 455/17, 455/9, 455/67.1, 455/56.1, 455/517, 455/518, 455/509, 455/515, 455/524, 455/8, 455/16, 455/51 4, 379/58, 379/59, 379/60, 379/63
• US Class Current: 455/11.1
• CPC Class Codes: H04B 7/2606 Arrangements for base station coverage control, e.g. by using relays in tunnels
• CPC Class Codes: H04W 16/26 Cell enhancers or enhancement, e.g. for tunnels, building shadow
• CPC Class Codes: H04W 84/08 Trunked mobile radio systems

Abstract

The present invention relates to a method and radio system for controlling a subscriber station (MS1) operating on a direct mode channel in a radio system, said radio system comprising a radio network (SwMi) with at least one base station (BS) and subscriber stations (MS1), and further, at least one repeater station (RS), which forwards traffic between said at least one base station (BS) and the subscriber stations (MS1) operating on the direct mode channel. To control the subscriber stations operating on the direct mode channel, information on the identifiers of subscriber stations operating on the direct mode channel in the coverage area of the repeater station (RS) is maintained in said repeater station (RS).

Claims

1. A method for controlling a subscriber station operating on a direct mode channel in a radio system, the method comprising:

providing the radio system with a radio network with at least one base station, a plurality of subscriber stations having respective identifiers, and at least one mobile relay repeater station having a coverage area;

operating at least two of the subscriber stations on a at least one direct mode channel;

the at least one mobile relay repeater station forwarding traffic on separate radio paths between the at least one base station and those of the subscriber stations which are operating on the direct mode channel;

the at least one mobile relay repeater station maintaining, in the mobile relay repeater station, data as to the identifier of each the at least one direct mode channel on which respective ones of the subscriber stations operate;

the at least one mobile relay repeater station maintaining information as to the identifiers of those of the subscriber stations which are operating on the at least one direct mode channel in the coverage area of the mobile relay repeater station, the maintaining of information as to the identifiers of those of the subscriber stations including, by the mobile relay repeater station;

listening to the operating of respective ones of the subscriber stations on the at least one direct mode channel;

collecting the identifiers of the respective ones of the subscriber stations from transmissions of the subscriber stations; and

storing the collected identifiers of the respective ones of the subscriber stations operating on the at least one direct mode channel in a database of the mobile relay repeater station.

2. A method according to claim 1, wherein the maintaining further includes:

the mobile relay repeater station independently starting maintaining of the data.

3. A method according to claim 1, wherein the maintaining further includes:

the radio network starting maintaining of the data in the mobile relay repeater station by transmitting a data maintenance starting message to the mobile relay repeater station.

4. A method according to claim 3, further comprising:

transmitting the data maintained in the mobile relay repeater station to the radio network.

5. A method according to claim 1, wherein the maintaining further includes:

a terminal equipment connected with the radio network starting the maintaining of the data in the repeater station by transmitting a data maintenance starting message to the mobile relay repeater station.

6. A method according to claim 3, further comprising:

transmitting the data maintained in the mobile relay repeater station to the terminal equipment connected with the radio network.

7. A method for controlling a subscriber station operating on a direct mode channel in a radio system, the method comprising:

providing the radio system with a radio network with at least one base station, a plurality of subscriber station having respective identifiers, and at least one mobile relay repeater station having a coverage area;

operating at least two of the subscriber stations on at least one direct mode channel;

the at least one mobile relay repeater station forwarding traffic on separate radio paths between the at least one base station and those of the subscriber stations which are operating on the direct mode channel;

the at least one mobile relay repeater station maintaining, in the mobile relay repeater station, data as to the identifier of each the at least one direct mode channel on which respective ones of the subscriber stations operate;

the at least one mobile relay repeater station maintaining information as to the identifiers of those of the subscriber stations which are operating on the at least one direct mode channel in the coverage area of the mobile relay repeater station, the maintaining of information as to the identifiers of those of the subscriber stations including;

the mobile relay repeater station asking for the identifiers of the respective ones of the subscriber stations which are operating on the at least one direct mode channel within the coverage area, by transmitting an identifier confirmation message;

in response to reception of the identifier confirmation message transmitted by the mobile relay repeater station, the subscriber stations transmitting their respective identifiers to the mobile relay repeater station; and

the repeater station storing data as to the identifiers in a database of the mobile relay repeater stations.

8. A method according to claim 7, wherein the maintaining further includes:

the mobile relay repeater station independently starting maintaining of the data.

9. A method according to claim 7, wherein the maintaining further includes:

the radio network starting the maintaining of the data in the mobile relay repeater station by transmitting a data maintenance starting message to the mobile relay repeater station.

10. A method according to claim 9, further comprising:

transmitting the data maintained in the mobile relay repeater station to the radio network.

11. A method according to claim 7, wherein the maintaining further includes:

a terminal equipment connected with the radio network starting the maintaining of the data in the repeater station by transmitting a data maintenance starting message to the mobile relay repeater station.

12. A method according to claim 11, further comprising:

transmitting the data maintained in the mobile relay repeater station to the terminal equipment connected with the radio network.

13. A radio system comprising:

a radio network with at least one base station;

a plurality of subscriber stations having respective identifiers;

at least one mobile relay repeater station having a respective coverage area and which mobile relay repeater forwards traffic on separate radio paths between the at least one base station and those of the subscriber stations which are operating on at least one direct mode channel, wherein each the mobile relay repeater station comprises a database containing the identifiers of those of the subscriber stations which are operating on the at least one direct mode channel within the coverage area of the respective the mobile relay repeater station;

means for maintaining the identifiers of the respective ones of the subscriber stations in the respective the database, wherein;

for each the mobile relay repeater station the means for maintaining the identifiers is arranged to maintain in the respective the database an identifier of each direct mode channel on which each subscriber station located within the coverage area of the respective the mobile relay repeater station respectively is authorized to operate,

each the mobile relay repeater station comprising;

means for collecting the identifiers of those of the subscriber stations which are operating on the at least one direct mode channel, from received signals; and

means for storing the collected identifiers of the respective ones of the subscriber stations in the respective the mobile relay database maintained by the respective the mobile relay repeater station.

14. A radio system according to claim 13, wherein each the mobile relay repeater station comprises:

means for asking the identifiers of those of the subscriber stations which are operating on the at least one direct mode channel by transmitting an identifier confirmation message to those of the subscriber stations which are operating on the at least one direct mode channel.

15. A radio system according to claim 13, wherein the mobile relay repeater station comprises:

means for starting maintaining of the identifiers of those of the subscriber stations which are operating on the at least one direct mode channel.

16. A radio system according to claim 13, where the radio network comprises:

means for starting maintaining of the identifiers of those of the subscriber stations which are operating on the at least one direct mode channel in a respective the mobile relay repeater station by transmitting a data maintenance starting message.

17. A radio system according to claim 13, further comprising a terminal equipment connected to the radio network;

the terminal equipment including;

means for starting maintaining of the identifiers of those of the subscriber stations which are operating on the at least one direct mode channel in a respective the mobile relay repeater station, by transmitting a data maintenance starting message.

18. A radio system, comprising:

a radio network with at least one base station;

a plurality of subscriber stations having respective identifiers;

at least one mobile relay repeater station having a respective coverage area, which mobile relay repeater forwards traffic on separate radio paths between the at least one base station and those of the subscriber stations which are operating on at least one direct mode channel;

each the mobile relay repeater station comprises;

means for asking the identifiers of those of the subscriber stations which are operating on the at least one direct mode channel, by transmitting an identifier confirmation message to those of the subscriber stations which are operating on the at least one direct mode channel;

a database containing the identifiers of those of the subscriber stations which are operating on the at least one direct mode channel within the coverage area of the respective the mobile relay repeater station;

means for maintaining the identifiers of the respective ones of the subscriber stations in the respective the database,

for each the mobile relay repeater station the means for maintaining the identifiers is arranged to maintain in the respective the database an identifier of each direct mode channel on which each subscriber station located within the coverage area of the respective the mobile relay repeater station respectively is authorized to operate.

19. A radio system according to claim 18, wherein each the mobile relay repeater station comprises:

means for starting maintaining of the identifiers of those of the subscriber stations which are operating on the at least one direct mode channel.

20. A radio system according to claim 18, wherein the radio network comprises:

means for starting maintaining of the identifiers of those of the subscriber stations which are operating on the at least one direct mode channel in a respective the mobile relay repeater station, by transmitting a data maintenance starting message.

21. A radio system according to claim 18, further comprising a terminal equipment connected to the radio network;

the terminal equipment including;

means for starting maintaining of the identifiers of those of the subscriber stations which are operating on the at least one direct mode channel in a respective the mobile relay repeater station, by transmitting a data maintenance starting message.