Method for cell selection and reselection by a cellular mobile station in idle mode

• US 20040192313A1
• Filed: 03/25/2003
• Published: 09/30/2004
• Est. Priority Date: 03/25/2003
• Status: Abandoned Application

• Current Assignee: Motorola, Inc. (Motorola Solutions, Inc.)
• Original Assignee: Motorola, Inc. (Motorola Solutions, Inc.)
• Inventors: Otting, Marcia Jean
• Application Number:
  US10/396,523
• Publication Number:
  US 20040192313A1
• Time in Patent Office: Days
• US Class Current: 455/446
• CPC Class Codes: H04W 48/20 Selecting an access point
• CPC Class Codes: H04W 52/0245 according to signal strength
• CPC Class Codes: H04W 84/042 Public Land Mobile systems, e.g. cellular systems
• CPC Class Codes: Y02D 30/70 in wireless communication networks

Abstract

A method for permitting mobile stations in idle mode to select a cell based on services provided by the cell. Network control of service based selection is regulated by a new broadcast parameter broadcasting whether a particular cell will allow service based cell selection.

Claims

1. A method for selecting and reselecting a radio cell within a cellular mobile radio network having at least two cells by a mobile station in idle mode, comprising:

detecting by the mobile station a plurality of cells providing services selected from the group consisting of no services, only normal services, only additional services, and all services offered;

receiving and evaluating by the mobile station the network information;

receiving and evaluating by the mobile station in idle mode additional network information;

determining the mobile station'"'"'s service requirements,

automatically selecting, by the mobile station, the best cell meeting the mobile station'"'"'s service requirements;

monitoring by the mobile station of the network information for a better cell providing the required services.

2. The method according to claim 1 wherein the cellular mobile radio network is a Global System for Mobile Communications (GSM) network.

3. The method of claim 1 wherein the network information comprises a Cell_Bar Qualify parameter, a Cell_Bar Access parameter, and at least one Additional Services_Supported parameter.

4. The method of claim 3 wherein the Additional Service Supported Parameter comprises a GPRS_Supported Parameter.

5. The method of claim 3 wherein the additional network information comprises a service based selection parameter.

6. The method of claim 5 wherein the service based selection parameter comprises Service Based Selection_Allowed or Service Based Selection_Not Allowed parameter.

7. The method of claim 6 wherein the service based selection parameter comprises GPRS Selection_Allowed or GPRS Selection_Not Allowed.

8. The method of claim 6 wherein the network controls service based selection of a cell by selectively setting the service based selection parameter.

9. The method of claim 6 wherein the mobile station prioritizes cells first on the availability of service based selection and then on normal parameters.

10. A method by which a mobile station in idle mode selects and reselects a cell, comprising

selecting, by the mobile station, the desired service mode;

receiving and evaluating network information;

determining a plurality of cells that permit service based selection;

prioritizing the plurality of cells that permit service based selection on the basis of normal prioritizing standards to identify the best cell;

selecting the best cell;

camping on the best cell;

monitoring network information for a change in priority; and

reselecting the best cell.

11. The method according to claim 10 wherein the network information comprises a Cell_Bar_Qualify parameter and a Cell_Bar Access parameter.

12. The method according to claim 11 wherein the network information further comprises a Service_Supported parameter.

13. The method according to claim 12 wherein the network information further comprises a Service Based Selection_Allowed-Service Based Selection_Not Allowed parameter.

14. The method according to claim 13 wherein the Service Service Based Selection_Allowed-Service Based Selection_Not Allowed parameter comprises GPRS Selection_Allowed-GPRS Selection_Not Allowed.

15. The method according to claim 14 wherein the network controls service based selection.

16. A method for permitting a mobile station to select a cell on the basis of services provided by the cell, the method comprising:

providing a plurality of cells in the network wherein each cell supports services selected from the group consisting of only normal services, only additional services, normal and additional services and no services;

periodically transmitting by the network, network information to a plurality of mobile stations which information is evaluated and received by mobile stations to indicate which services are available;

permitting selection by a mobile station of a cell providing a desired service by transmitting with the network information additional information comprising at least one additional parameter permitting service based selection and reselection.

17. The method of claim 16 wherein the system information comprises a Cell_Bar Qualify parameter, a Cell_Bar Access parameter, and at least one Additional Services parameter and at least one service based selection parameter.

18. The method of claim 17 wherein the additional services are selected from the group consisting of an ability to provide a video call, an ability to provide a data call, an ability to provide a bounded transfer delay, and an ability to provide a specified data throughput.

19. The method of claim 18 wherein the additional services comprise Global Packet Radio Services (GPRS).

20. The method of claim 19 wherein the service based selection parameter comprises GPRS Selection_Allowed and GPRS Selection_Not Allowed.

21. The method of claim 20 wherein the additional parameter comprises GPRS Reselection_Allowed and GPRS Reselection_Not Allowed.

22. The method of claim 21 wherein service based selection is regulated by the network by the service based selection parameter.