Method for reporting mobility information in wireless communication system and apparatus for supporting same

Patent metadata

Field	Value
Publication number	US-9344937-B2
Application number	US-201314414694-A
Country	US
Kind code	B2
Filing date	Aug 6, 2013
Priority date	Aug 6, 2012
Publication date	May 17, 2016
Grant date	May 17, 2016

Abstract

Provided is a method for reporting mobility information by means of a terminal in a wireless communication system. The method includes generating mobility information and reporting the mobility information via a network. The mobility information includes mobility state information indicating the estimated mobility state of the terminal, and mobility history information relating to the mobility history of the terminal.

First claim

What is claimed is:

1. A method for reporting mobility state estimation (MSE) information and mobility history information, performed by a user equipment, UE, in a wireless communication system, the method comprising:
generating the MSE information and the mobility history information; and
transmitting the MSE information and the mobility history information to a network,
wherein, when the UE moves from a first cell to a second cell, the mobility history information includes entry information indicating a mobility history entry for the first cell,
wherein the mobility history information includes a fixed maximum number of entries corresponding to recently camped cells, which is used as a condition for discarding the mobility history entry,
wherein the MSE information is used to represent a mobility state of the UE as a high mobility state, a medium mobility state and a normal mobility state, and
wherein the mobility state of the UE is determined by a number of handover or cell reselection attempts by the UE.

2. The method of claim 1 , wherein the first cell supports a first radio access technology (RAT) and the second cell supports a second radio access technology (RAT).

3. The method of claim 2 , wherein the first RAT and the second RAT are different from each other.

4. The method of claim 1 , wherein the entry information includes a global cell identity or a physical cell identity of the first cell.

5. The method of claim 4 , wherein the entry information includes time information indicating time spent in the first cell of the UE in an RRC idle state.

6. The method of claim 1 , wherein the first cell is a primary cell.

7. The method of claim 1 , wherein the entry information is included in the mobility history information after removing an oldest entry of the mobility history information.

8. The method of claim 1 , wherein the mobility history information is generated in a radio resource control, RRC, connected state or in an RRC_idle state of the UE.

9. The method of claim 1 , wherein the mobility state of the UE is represented by two bits included in the MSE information.

10. A user equipment (UE) for reporting mobility state estimation (MSE) information and mobility history information in a wireless communication system, the UE comprising:
a radio frequency, RF, unit for transmitting and receiving a radio signal; and
a processor coupled with the RF unit,
wherein the processor is configured to:
generate the MSE information and the mobility history information; and
transmit the MSE information and the mobility history information to a network,
wherein when the UE moves from a first cell to a second cell, the mobility history information includes entry information indicating a mobility history entry for the first cell,
wherein the mobility history information includes a fixed maximum number of entries corresponding to recently camped cells, which is used as a condition for discarding the mobility history entry,
wherein the MSE information is used to represent a mobility state of the UE as a high mobility state, a medium mobility state and a normal mobility state, and
wherein the mobility state of the UE is determined by a number of handover or cell reselection attempts by the UE.

11. The UE of claim 10 , wherein the first cell supports a first radio access technology (RAT) and the second cell supports a second radio access technology (RAT).

12. The UE of claim 11 , wherein the first RAT and the second RAT are different from each other.

13. The UE of claim 10 , wherein the entry information includes a global cell identity or a physical cell identity of the first cell.

14. The UE of claim 13 , wherein the entry information includes time information indicating time spent in the first cell of the UE in an RRC idle state.

15. The UE of claim 10 , wherein the first cell is a primary cell.

16. The UE of claim 10 , wherein the mobility state of the UE is represented by two bits included in the MSE information.

Assignees

• Lg Electronics Inc

Inventors

• Jung Sunghoon
• Lee Youngdae
• Park Sungjun
• Yi Seungjune
• Kim Sangwon

Classifications

• H04W88/02

  Terminal devices · CPC title

• H04W36/04

  Reselecting a cell layer in multi-layered cells · CPC title

• H04W36/008375 Primary

  based on historical data · CPC title

• H04J11/00

  Orthogonal multiplex systems, {e.g. using WALSH codes}(H04J13/00 takes precedence) · CPC title

• H04B7/0413

  MIMO systems · CPC title