System and method for cell reselection in a mobile communication network

• US 20030224790A1
• Filed: 05/23/2003
• Published: 12/04/2003
• Est. Priority Date: 05/30/2002
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Choi, Yoon Seok
• Granted Patent: US 7,630,718 B2
• Time in Patent Office: Days
• US Class Current: 455/435.3
• CPC Class Codes: H04W 36/30 by measured or perceived connection quality data
• CPC Class Codes: H04W 36/302 due to low signal strength
• CPC Class Codes: H04W 52/0245 according to signal strength
• CPC Class Codes: Y02D 30/70 in wireless communication networks

Abstract

A system and method for cell reselection in a radio communication network is provided. The system comprises a mobile terminal transmitting a receive signal strength list after measuring signal strengths of at least a neighbor cell; and a host system selecting a cell suitable for the mobile terminal based on a suitable cell list and the receive signal strength list and transmitting the cell reselection information to the mobile terminal. The suitable cell list comprises information representing whether or not the neighbor cell is suitable for selection by the mobile terminal.

Claims

1. A system for cell reselection in a mobile communication network comprising:

a mobile terminal transmitting a signal strength list comprising received signal strength of at least a neighbor cell; and

a host system selecting a cell from a suitable cell list wherein said selected cell has strongest signal strength according to information in the signal strength list, and the selected cell provides services subscribed to by the mobile terminal.

2. The system of claim 1, wherein the suitable cell list comprises information representing services the neighbor cell provides to the mobile terminal.

3. The system of claim 1, wherein the suitable cell list is managed by the host system based on at least one of a specification of the mobile terminal, kind of service subscribed by the mobile terminal, and data transfer rate required by the mobile terminal.

4. The system of claim 1, wherein the host system updates the suitable cell list based on moving information associated with the mobile terminal.

5. The system of claim 1, wherein the signal strength list comprises information about received signal strength from a plurality of cells neighboring a cell on which the mobile terminal is camping.

6. A method for cell reselection in a mobile communication network comprising:

transmitting a signal strength list to a host system, wherein the signal strength list comprises information about signal strength of at least one cell neighboring a cell on which a mobile terminal is camping; and

receiving information about a neighboring cell selected from said signal strength list, wherein said neighboring cell has strongest signal strength according to information in the signal strength list and said neighboring cell is included in a suitable cell list stored on the host system.

7. The method of claim 6, wherein the mobile terminal manages the signal strength list.

8. The method of claim 6, wherein the host system manages the suitable cell list.

9. The method of claim 6 further comprising camping on the selected neighboring cell by the mobile terminal.

10. The method of claim 6, wherein the suitable cell list comprises information about at least a neighbor cell that provides a service subscribed to by the mobile terminal.

11. The method of claim 6, wherein the suitable cell list is updated by the host system based on information comprising at least one of a specification of the mobile terminal, service kinds associated with the mobile terminal, and data transfer rate associated with the mobile terminal.

12. The method of claim 6 further comprising transmitting moving information to the host system, wherein the moving information represents mobility of the mobile terminal.

13. The method of claim 12 further comprising updating information in the suitable cell list based on the moving information.

14. The method of claim 12, wherein the moving information is provided by a user of the mobile terminal.

15. The method of claim 12, wherein the moving information is calculated based on registration of location information of the mobile terminal with the host system.

16. The method of claim 6, wherein the radio communication network has a hierarchical cell structure comprising a plurality of cell layers, wherein a cell layer can be classified based on at least one of specification of the mobile terminal, type of service subscribed to by the mobile terminal, and data transfer rate associated wit the mobile terminal.

17. A method of switching from a first cell to a second cell in a mobile communication network, the method comprising:

receiving information about signal strength of a first plurality of cells, where said first plurality of cells are neighbors of the first cell on which a mobile terminal is camping; and

selecting the second cell from a second plurality of cells, wherein the second cell has strongest signal strength and can provide services subscribed to by the mobile terminal.

18. The method of claim 17, wherein a first list maintained by the mobile terminal comprises information about signal strength of the first plurality of cells.

19. The method of claim 18, wherein a second list maintained by a host system comprises information about suitability of the second plurality of cells for the mobile terminal.

20. The method of claim 19, wherein suitability of the second plurality of cells depends on at least one of specification of a mobile terminal, type of services subscribed to by the mobile terminal, and data transfer rate associated with the mobile terminal.

21. A mobile terminal configured for switching from a first cell to a second cell in a mobile communication network, the mobile terminal comprising:

means for receiving information about signal strength of a first plurality of cells, wherein said first plurality of cells are neighbors of the first cell on which the mobile terminal is camping;

means for transmitting said information about the signal strength to a host system via the mobile communication network; and

means for receiving information about the second cell selected from a second plurality of cells, wherein the second cell has strongest signal strength and can provide services subscribed to by the mobile terminal.

22. The mobile terminal of claim 21, wherein the mobile terminal maintains a first list comprising information about signal strength of the first plurality of cells.

23. The mobile terminal of claim 22, wherein a second list maintained by the host system comprises information about suitability of the second plurality of cells for the mobile terminal.

24. The mobile terminal of claim 23, wherein suitability of the second plurality of cells depends on at least one of specification of the mobile terminal, type of services subscribed to by the mobile terminal, and data transfer rate associated with the mobile terminal.

25. A host system in communication with a mobile terminal configured to switch from a first cell to a second cell in a mobile communication network, the host system comprising:

means for receiving information about signal strength of a first plurality of cells, wherein said first plurality of cells are neighbors of the first cell on which the mobile terminal is camping;

means for selecting the second cell from a second plurality of cells, wherein the second cell has strongest signal strength and can provide services subscribed to by the mobile terminal; and

means for transmitting information about the second cell to the mobile terminal.

26. The host system of claim 25, wherein a first list maintained by the mobile terminal comprises information about signal strength of the first plurality of cells.

27. The host system of claim 26, wherein a second list maintained by the host system comprises information about suitability of the second plurality of cells for the mobile terminal.

28. The host system of claim 27, wherein suitability of the second plurality of cells depends on at least one of specification of the mobile terminal, type of services subscribed to by the mobile terminal, and data transfer rate associated with the mobile terminal.