Apparatus and method for performing cell selection to home cell or private network in a mobile communication system

• US 8,774,810 B2
• Filed: 10/08/2013
• Issued: 07/08/2014
• Est. Priority Date: 01/16/2007
• Status: Active Grant

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: Jeong, Kyeong-In, Van Lieshout, Gert Jan, Kim, Soeng-Hun
• Primary Examiner(s): WASHINGTON, ERIKA ALISE
• Application Number:
  US14/048,738
• Publication Number:
  US 20140038610A1
• Time in Patent Office: 273 Days
• US Class Current: 455/436
• CPC Class Codes: H04W 36/0061 of neighbour cell information
• CPC Class Codes: H04W 4/02 Services making use of location information
• CPC Class Codes: H04W 48/08 Access restriction or access information delivery, e.g. discovery data delivery signalling during connection H04W76/00
• CPC Class Codes: H04W 48/10 using broadcasted information
• CPC Class Codes: H04W 48/20 Selecting an access point
• CPC Class Codes: H04W 8/18 Processing of user or subscriber data, e.g. subscribed services, user preferences or user profiles; Transfer of user or subscriber data
• CPC Class Codes: H04W 84/105 PBS [Private Base Station] network H04W84/12 - H04W84/16 take precedence

Abstract

An apparatus and method for performing cell selection to a Home cell or a Private network in a mobile communication system are provided, in which a User Equipment (UE) determines a candidate cell by measuring a serving cell and neighbor cells, receives an indicator indicating a Home cell or a Private network in system information from the candidate cell, determines whether the candidate cell is included in a Home cell or Private network list set in the UE, and selects the candidate cell if the candidate cell is included in the Home cell or Private network list.

Claims

1. A method for performing cell selection to a Closed Subscriber Group (CSG) cell by a User Equipment (UE) in a mobile communication system, comprising:

receiving, by the UE, information about a neighbor cell list and information about at least one CSG cell, from a serving cell;

performing, by the UE, measurement for at least one neighbor cell based on the information about the neighbor cell list;

determining, by the UE, a candidate cell based on the measurement;

receiving, by the UE, at least two of Public Land Mobile Network (PLMN) information, an indicator indicating information related to the CSG cell, and a CSG IDentification (ID) from the candidate cell;

determining, by the UE, whether the candidate cell belongs to a registered or selected PLMN, based on the PLMN information;

determining, by the UE, whether the candidate cell is a CSG cell based on the CSG ID and the indicator indicating information related to the CSG cell; and

selecting, for the CSG cell, by the UE, the candidate cell, if the candidate cell belongs to the registered or selected PLMN, the indicator indicates a predetermined value, and the CSG ID of the candidate cell is included in the CSG list.

2. The method of claim 1, further comprising:

determining whether the CSG ID is defined based on at least one of a CSG specific ID, a CSG cell specific offset, and the indicator indicating information related to the CSG cell.

3. The method of claim 2, further comprising extracting the neighbor cell from the neighbor cell list, based on a value of the CSG cell specific offset.

4. The method of claim 3, wherein a priority level of the extracted neighbor cell is decreased if the extracted neighbor cell is not included in the CSG list.

5. The method of claim 3, further comprising determining whether the CSG ID of the extracted neighbor cell is included in the CSG list.

6. The method of claim 1, wherein the neighbor cell list comprises at least one offset value corresponding to at least one neighboring cell,

the offset value being used for determining the candidate cell based on the measurement.

7. The method of claim 1, further comprising:

determining that the candidate cell is a public cell, if the candidate cell is not a CSG cell.

8. The method of claim 1, further comprising selecting the candidate cell, if the candidate cell belongs to a registered or selected PLMN.

9. The method of claim 1, wherein the CSG list is stored in a Universal Subscriber Identity Module (USIM) of the UE.

10. The method of claim 1, wherein the predetermined value indicates that the UE is accessible to the CSG cell, if the CSG ID is included in the CSG list in the UE.

11. The method of claim 1, wherein the CSG list is signaled to the UE from a higher network.

12. The method of claim 1, wherein the CSG ID and the indicator indicating the information related to the CSG cell are received in system information from the candidate cell.

13. The method of claim 1, further comprising identifying the candidate cell as a candidate that cannot be selected, if the CSG ID is not included in the CSG list.

14. An apparatus for performing cell selection to a Closed Subscriber Group (CSG) cell by a User Equipment (UE) in a mobile communication system, comprising:

a receiver configured to receive information about a neighbor cell list and information about at least one CSG cell, from a serving cell, and at least two of Public Land Mobile Network (PLMN) information, an indicator indicating information related to the CSG cell, and a CSG IDentification (ID) from a candidate cell; and

a controller configured to perform measurement for at least one neighbor cell based on the information about the neighbor cell list, determine the candidate cell based on the measurement, and determine whether the candidate cell belongs to a registered or selected PLMN, based on the PLMN information, and whether the candidate cell is a CSG cell based on the CSG ID and the indicator indicating information related to the CSG cell,

wherein for the CSG cell, the controller is configured to select the candidate cell, if the candidate cell belongs to the registered or selected PLMN, the indicator indicates a predetermined value, and the CSG ID of the candidate cell is included in the CSG list.

15. The apparatus of claim 14, wherein the controller is further configured to determine whether the CSG ID is defined based on at least one of a CSG specific ID, a CSG cell specific offset, and the indicator indicating information related to the CSG cell.

16. The apparatus of claim 15, wherein the controller extracts the neighbor cell from the neighbor cell list based on the offset value.

17. The apparatus of claim 16, wherein the controller decreases a priority level of the extracted neighbor cell if the extracted neighbor cell is not included in the CSG list.

18. The apparatus of claim 16, wherein the controller determines whether the CSG ID of the extracted neighbor cell is included in the CSG list.

19. The apparatus of claim 14, wherein the neighbor cell list further comprises at least one offset value corresponding to at least one neighboring cell, the offset value being used for determining the candidate cell based on the measurement.

20. The apparatus of claim 14, wherein the controller is configured to consider the candidate cell to be a public cell, if the candidate cell is not a CSG cell.

21. The apparatus of claim 14, wherein the controller selects the candidate cell, if the candidate cell belongs to a registered or selected PLMN.

22. The apparatus of claim 14, wherein the CSG list is stored in a Universal Subscriber Identity Module (USIM) of the UE.

23. The apparatus of claim 14, wherein the predetermined value indicates that the UE is accessible to the CSG cell, if the CSG ID is included in the CSG list in the UE.

24. The apparatus of claim 14, wherein the CSG list is signaled to the UE from a higher network.

25. The apparatus of claim 14, wherein the CSG ID and the indicator indicating the information related to the CSG cell are received in system information from the candidate cell.

26. The apparatus of claim 14, wherein the controller identifies the candidate cell as a candidate that cannot be selected, if the CSG ID is not included in the CSG list.

27. A method for servicing a Closed Subscriber Group (CSG) cell in a mobile communication system, comprising:

setting, by a current cell, information about a neighbor cell list and information about at least one CSG cell in system information;

broadcasting, by the current cell, the information about the neighbor cell list and information about the at least one CSG cell in the system information, to a User Equipment (UE);

setting, by the current cell, at least two of Public Land Mobile Network (PLMN) information, an indicator indicating information related to a CSG cell, and a CSG IDentification (ID) for the current cell in the system information; and

broadcasting, by the current cell, at least two of the PLMN information, the indicator indicating information related to the CSG cell, and the CSG ID for the current cell in the system information, to the UE.

28. The method of claim 27, wherein the neighbor cell list comprises at least one offset value corresponding to at least one neighboring cell, the offset value being used for determining a candidate cell.

29. The method of claim 27, wherein if the indicator is a predetermined value, the indicator indicates that the UE is accessible to the CSG cell, if the CSG ID is included in a CSG list in the UE.

30. The method of claim 27, wherein the CSG list is signaled to the UE from a higher network.

31. An apparatus for servicing a Closed Subscriber Group (CSG) cell in a mobile communication system, comprising:

a setter configured to set information about a neighbor cell list, information about at least one CSG cell in system information, and at least two of Public Land Mobile Network (PLMN) information, an indicator indicating information related to a CSG cell, and a CSG IDentification (ID) for a current cell in system information; and

a transceiver configured to broadcast the information about the neighbor cell list, information about the at least one CSG cell in the system information, and at least two of the PLMN information, the indicator indicating information related to the CSG cell, and the CSG ID for the current cell in the system information, to a User Equipment (UE).

32. The apparatus of claim 31, wherein the neighbor cell list comprises at least one offset value corresponding to at least one neighboring cell, the offset value being used for determining a candidate cell.

33. The apparatus of claim 31, wherein if the indicator is a predetermined value, the indicator indicates that the UE is accessible to the CSG cell, if the CSG ID is included in a CSG list in the UE.

34. The apparatus of claim 31, wherein the CSG list is signaled to the UE from a higher network.