Method for re-selecting cell by user equipment and user equipment using same

• US 10,034,207 B2
• Filed: 11/07/2014
• Issued: 07/24/2018
• Est. Priority Date: 11/07/2013
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Jung, Sunghoon, Lee, Jaewook
• Primary Examiner(s): Nguyen, Anh Ngoc
• Application Number:
  US15/034,800
• Publication Number:
  US 20160286445A1
• Time in Patent Office: 1,355 Days
• Field of Search: None
• CPC Class Codes: H04W 24/10 Scheduling measurement reports ; Arrangements for measurement reports
• CPC Class Codes: H04W 36/06 Reselecting a communication resource in the serving access point
• CPC Class Codes: H04W 48/20 Selecting an access point

Abstract

A method for re-selecting a cell by a user equipment and a user equipment using the method are provided. The method comprises: receiving a normal frequency priority capable of being used to re-select a cell; determining whether a particular frequency satisfies a condition for applying a random priority; applying the randomly selected priority instead of applying the normal frequency priority to the particular frequency when the condition is satisfied; and re-selecting the cell on the basis of the randomly selected priority.

Claims

1. A method for reselecting a cell, the method performed by a user equipment and comprising:

receiving a threshold and a normal frequency priority for cell reselection;

selecting a random number within a specific range;

comparing the selected random number with the received threshold;

determining whether a condition in which a priority according to the normal frequency priority is adjusted is satisfied with respect to a specific frequency;

adjusting the priority for the specific frequency if the condition is satisfied; and

performing the cell reselection based on the adjusted priority.

2. The method of claim 1, further comprising receiving a priority adjustment value,

wherein the priority for the specific frequency is adjusted according to the priority adjustment value if the condition is satisfied.

3. The method of claim 2, wherein the priority adjustment value is a predetermined value or is received from a network.

4. The method of claim 1, further comprising receiving a priority adjustment value,

wherein the priority is adjusted according to a product of the priority adjustment value and the selected random number if the condition is satisfied.

5. The method of claim 4, wherein the condition is satisfied if both the threshold and the priority adjustment value are received.

6. A user equipment (UE) performing cell reselection, the UE comprising:

a radio frequency (RF) unit transmitting and receiving radio signals; and

a processor connected to the RF unit, wherein the processor is configured to;

control the RF unit to receive a threshold and a normal frequency priority for cell reselection;

select a random number within a specific range;

compare the selected random number with the received threshold;

determine whether a condition in which a priority according to the normal frequency priority is adjusted is satisfied with respect to a specific frequency;

adjust the priority for the specific frequency if the condition is satisfied; and

perform the cell reselection based on the adjusted priority.

7. The apparatus of claim 6, wherein:

the processor is further configured to control the RF unit to receive a priority adjustment value; and

the priority for the specific frequency is adjusted according to the priority adjustment value if the condition is satisfied.

8. The apparatus of claim 7, wherein the priority adjustment value is a predetermined value or is received from a network.

9. The apparatus of claim 6, wherein:

the processor is further configured to control the RF unit to receive a priority adjustment value; and

the priority is adjusted according to a product of the priority adjustment value and the selected random number if the condition is satisfied.

10. The apparatus of claim 9, wherein the condition is satisfied if both the threshold and the priority adjustment value are received.