RADIO COMMUNICATION SYSTEM, RADIO TERMINAL, RADIO STATION, EVOLVED PACKET CORE, AND INFORMATION GATHERING METHOD

• US 20140295847A1
• Filed: 09/28/2012
• Published: 10/02/2014
• Est. Priority Date: 09/30/2011
• Status: Active Grant

• Current Assignee: NEC Corporation
• Original Assignee: NEC Corporation
• Inventors: Futaki, Hisashi
• Granted Patent: US 9,565,600 B2
• Time in Patent Office: Days
• US Class Current: 455/436
• CPC Class Codes: H04W 24/10 Scheduling measurement reports ; Arrangements for measurement reports
• CPC Class Codes: H04W 36/0058 Transmission of hand-off measurement information, e.g. measurement reports
• CPC Class Codes: H04W 36/0066 of control information between different types of networks in order to establish a new radio link in the target network
• CPC Class Codes: H04W 36/00837 Determination of triggering parameters for hand-off
• CPC Class Codes: H04W 36/0085 Hand-off measurements
• CPC Class Codes: H04W 88/06 adapted for operation in multiple networks or having at least two operational modes, e.g. multi-mode terminals

Abstract

The present invention is a radio communication system in which a radio terminal obtains measurement information designated by a network in an idle state and reports the obtained measurement information in an active state, the radio communication system comprising: a radio station con to operate a first cell of a first Radio Access Technology, wherein, in the first cell, the radio station comprises; notifying means configured to notify the radio terminal of first configuration information related to obtainment of the measurement information in the first cell; and a request means configured to request the radio terminal to obtain, after the radio terminal moves to a second cell of a second Radio Access Technology different from the first Radio Access Technology, the measurement information in the second cell.

Claims

1. A radio communication system in which a radio terminal obtains measurement information designated by a network in an idle state and reports the obtained measurement information in an active state, the radio communication system comprising:

a radio station configured to operate a first cell of a first Radio Access Technology, wherein, in the first cell, the radio station comprises;

a notifying means configured to notify the radio terminal of first configuration information related to obtainment of the measurement information in the first cell; and

a request means configured to request the radio terminal to obtain, after the radio terminal moves to a second cell of a second Radio Access Technology different from the first Radio Access Technology, the measurement information in the second cell.

2. The radio communication system according to claim 1, wherein the radio terminal obtains, after moving from the first cell to the second cell, the measurement information in the second cell.

3. The radio communication system according to claim 2, wherein the radio terminal

stores in advance information on first measurement items and second measurement items, as obtainment targets, of the measurement information in each corresponding first cell and the second cell and

switches, after moving from the first cell to the second cell, the obtainment target from the first measurement items to the second measurement items.

4. The radio communication system according to claim 2, wherein the radio terminal

reuses, after moving to the second cell, at least a part of the first configuration information and obtains second measurement information in the second cell.

5. The radio communication system according to claim 1, wherein the first configuration information comprises at least any one of

an absolute time as a reference time which starts logging of the measurement information,

a logging duration of the measurement information,

a logging interval of the measurement information,

a logging target area of the measurement information, and

trace-related information.

6. The radio communication system according to claim 5, wherein the radio terminal takes over at least any one of

the absolute time, the logging duration, the logging interval, and the trace-related information.

7-12. -12. (canceled)

13. A radio terminal obtaining measurement information designated by a network in an idle state and reporting the obtained measurement information in an active state, the radio terminal comprising:

a receiving means configured to receive from a radio station operating a first cell of a first Radio Access Technology first configuration information related to obtainment of the measurement information in the first cell and

to receive a request for obtaining the measurement information, after the radio terminal moves to a second cell of a second Radio Access Technology different from the first Radio Access Technology, from the radio station; and

a measurement information obtaining means configured to obtain the measurement information based on the request.

14. The radio terminal according to claim 13, wherein the measurement information obtaining means obtains, after the radio terminal moves from the first cell to the second cell, the measurement information in the second cell.

15. The radio terminal according to claim 14, wherein the measurement information obtaining means

preliminary stores information on first measurement items and second measurement items, as obtainment targets, of the measurement information in each corresponding first cell and second cell and

switches, after the radio terminal moves from the first cell to the second cell, the obtainment target from the first measurement items to the second measurement items.

16. The radio terminal according to claim 14, wherein the measurement information obtaining means

reuses, after the radio terminal moves to the second cell, at least a part of the first configuration information and obtains second measurement information in the second cell.

17. The radio terminal according to claim 13, wherein the first configuration information includes at least any one of

an absolute time as a reference time which starts logging of the measurement information,

logging duration of the measurement information,

a logging interval of the measurement information,

a logging target area of the measurement information, and

trace-related information.

18. The radio terminal according to claim 17, wherein the measurement information obtaining means takes over at least any one of the absolute time, the logging duration, the logging interval, or the trace-related information.

19. The radio terminal according to claim 18, wherein the measurement information obtaining means

measures at least one of the logging duration or the logging interval by a timer and

continues at least one of a timer value of the logging duration or a timer value of the logging interval.

20. The radio terminal according to claim 13, wherein the measurement information obtaining means

obtains, based on second configuration information related to the obtainment of the measurement information in the second cell notified from the radio station, the measurement information in the second cell.

21. The radio terminal according to claim 13, wherein the measurement information obtaining means

distinguishes the first measurement information obtained in the first cell from the second measurement information obtained in the second cell.

22. The radio terminal according to claim 21, wherein the measurement information obtaining means

adds, when the radio terminal reports the first measurement information or the second measurement information, information indicating Radio Access Technology corresponding to the obtained measurement information.

23-24. -24. (canceled)

25. A radio station in a radio communication system, in which a radio terminal obtains measurement information designated by a network in an idle state and reports the obtained measurement information in an active state:

wherein the radio station configured to operate a first cell of a first Radio Access Technology comprises;

a notifying means configured to notify the radio terminal staying in the first cell of first configuration information related to obtainment of the measurement information in the first cell; and

a request means configured to request the radio terminal staying in the first cell such that the radio terminal obtains, after moving to a second cell of a second Radio Access Technology different from the first Radio Access Technology, the measurement information in the second cell.

26. The radio station according to claim 25, wherein the first configuration information contains at least any one of

an absolute time as a reference time which starts logging of the measurement information,

a logging duration of the measurement information,

a logging interval of the measurement information,

a logging target area of the measurement information, and

trace-related information.

27. The radio station according to claim 25, wherein the notifying means notifies second configuration information related to obtainment of the measurement information in the second cell to the radio terminal.

28. A network apparatus causing a radio terminal to obtain measurement information in an idle state and causing the radio terminal to report the obtained measurement information in an active state, the network apparatus comprising:

a notifying means configured to notify first configuration information related to obtainment of the measurement information in the first cell by the radio terminal, to a radio station operating a first cell of a first Radio Access Technology where the radio terminal stays; and

an instruction means configured to instruct the radio station to make the radio terminal to obtain, after the radio terminal moves to a second cell of a second Radio Access Technology different from the first Radio Access Technology, the measurement information in the second cell.

29. An information collection method in which a radio terminal obtains measurement information designated by a network in an idle state and reports the obtained measurement information in an active state, the information collection method comprising:

notifying the radio terminal staying in a first cell of a first Radio Access Technology of first configuration information related to obtainment of the measurement information in the first cell; and

requiring the radio terminal staying in the first cell to obtain, after the radio terminal moves to a second cell of a second Radio Access Technology different from the first Radio Access Technology, the measurement information in the second cell.

30. An information collection method in which radio terminal obtains measurement information designated by a network in an idle state and reports the obtained measurement information in an active state, the information collection method comprising:

receiving from a radio station operating a first cell of a first Radio Access Technology first configuration information related to obtainment of the measurement information in the first cell;

receiving a request from the radio station to obtain, after the radio terminal moves to a second cell of a second Radio Access Technology different from the first Radio Access Technology, the measurement information; and

obtaining the measurement information based on the request.