Method and device for preserving mobility information in terminal state transition and effectively re-accessing in heterogeneous cell network in mobile communication system

Patent metadata

Field	Value
Publication number	US-9894588-B2
Application number	US-201314388780-A
Country	US
Kind code	B2
Filing date	Mar 26, 2013
Priority date	Mar 26, 2012
Publication date	Feb 13, 2018
Grant date	Feb 13, 2018

Abstract

The present invention pertains to a method and device for preserving mobility information in terminal state transition and effectively re-accessing in a heterogeneous cell network in a mobile communication system. A method for estimating a mobility state of a terminal in a mobile communication system according to one embodiment of the present invention may comprise the steps of: receiving, by the terminal, system information from a serving cell during an idle state; calculating mobility state information by using the received system information; storing the mobility state information; and transmitting the mobility state information to a base station when the terminal is connected to the base station. According to one embodiment of the present invention, when an idle state of a terminal is changed to a connection state in a mobile communication system, a mobility state of the terminal can be more effectively estimated.

First claim

The invention claimed is:

1. A method by a terminal in a wireless communication system, the method comprising:
generating a message to confirm a completion of a radio resource control (RRC) connection establishment, the message including first information on a mobility state just prior to a terminal going into a RRC connected mode and second information indicating that a mobility history information is available;
transmitting the message to a base station;
receiving, from the base station, a request message for requesting the mobility history information, the request message being generated based on the second information; and
transmitting, to the base station, a response message including the mobility history information in response to the request message.

2. The method of claim 1 , wherein the second information indicating that the mobility, history information is available comprises a cell identity of a visited cell and time spent in the visited cell.

3. The method of claim 1 , wherein the message is transmitted during establishing an RRC connection between the terminal and the base station.

4. The method of claim 1 , wherein the mobility state is determined based on a of cell reselection during predetermined time period using parameters sent from the base station.

5. A method by a base station, the method comprising:
receiving a message to confirm a completion of a radio resource control (RRC) connection establishment, the message including first information on a mobility state just prior to a terminal going into a RRC connected mode and second information indicating that a mobility history information is available, from a terminal, if the message is generated by the terminal;
transmitting, to the terminal, a request message for requesting the mobility history information, the request message being generated based on the second information; and
receiving, from the terminal, a response message including the mobility history information in response to the request message.

6. The method of claim 5 , wherein the second information indicating that the mobility history information is available comprises a cell identity of a visited cell and time spent in the visited cell by the terminal.

7. The method of claim 5 , wherein the message is received during establishing an RRC connection between the terminal and a base station.

8. The method of claim 5 , wherein the mobility state is determined based on a number of cell reselection during a predetermined time period using parameters sent from the base station.

9. A terminal comprising:
a transceiver configured to transmit and receive a signal; and
a controller configured to:
generate a message to confirm a completion of a radio resource control (RRC) connection establishment, the message including first information on a mobility state just prior to a terminal going into a RRC connected mode and second information indicating that a mobility history information is available;
control the transceiver to transmit the message to a base station;
control the transceiver to receive, from the base station, a request message for requesting the mobility history information, the request message being generated based on the second information; and
control the transceiver to transmit, to the base station, a response message including the mobility history information in response to the request message.

10. The terminal of claim 9 , wherein the second information indicating that the mobility history information is available comprises a cell identity of a visited cell and time spent in the visited cell.

11. The terminal of claim 9 , wherein the message is transmitted during establishing an RRC connection between the terminal and the base station.

12. The terminal of claim 9 , wherein the mobility state is determined based on a number of cell reselection during a predetermined time period using parameters sent from the base station.

13. A base station, comprising:
a transceiver configured to transmit and receive a signal; and
a controller configured to:
control the transceiver to receive a message to confirm a completion of a radio resource control (RRC) connection establishment, the message including first information on a mobility state just prior to a terminal going into a RRC connected mode and second information indicating that a mobility history information is available, from a terminal, if the message is generated by the terminal;
control the transceiver to transmit, to the terminal, a request message for requesting the mobility history information, the request message being generated based on the second information; and
control the transceiver to receive, from the terminal, a response message including the mobility history information in response to the request message.

14. The base station of claim 13 , wherein the second information indicating that the mobility history information is available comprises a cell identity of a visited cell and time spent in the visited cell by the terminal.

15. The base station of claim 13 , wherein the message is received during establishing an RRC connection between the terminal and the base station.

16. The base station of claim 13 , wherein the mobility state is determined based on a number of cell reselection during a predetermined time period using parameters sent from the base station.

17. The method of claim 1 , wherein the first information is used to determine a configuration for the terminal by the base station.

18. The method of claim 5 , further comprises:
determining a configuration for the terminal based on the first information.

19. The terminal of claim 9 , wherein the first information is used to determine a configuration for the terminal by the base station.

20. The base station of claim 13 , wherein the controller further configured to determine a configuration for the terminal based on the first information.

Assignees

• Samsung Electronics Co Ltd

Inventors

• Kim Woo Seong
• Kim Soeng Hun
• Kim Sang Bum

Classifications

• H04W88/08

  Access point devices · CPC title

• H04W84/045

  using private Base Stations, e.g. femto Base Stations, home Node B · CPC title

• H04W8/02 Primary

  Processing of mobility data, e.g. registration information at HLR [Home Location Register] or VLR [Visitor Location Register]; Transfer of mobility data, e.g. between HLR, VLR or external networks · CPC title

• H04W60/00

  Affiliation to network, e.g. registration; Terminating affiliation with the network, e.g. de-registration · CPC title

• H04W8/08 Primary

  Mobility data transfer · CPC title