Radio communication system, radio terminal, radio station, network apparatus, and information collecting method

• US 9,801,086 B2
• Filed: 09/28/2012
• Issued: 10/24/2017
• Est. Priority Date: 09/30/2011
• Status: Active Grant

• Current Assignee: NEC Corporation
• Original Assignee: NEC Corporation
• Inventors: Futaki, Hisashi
• Primary Examiner(s): Lai, Daniel
• Application Number:
  US14/348,539
• Publication Number:
  US 20140228016A1
• Time in Patent Office: 1,852 Days
• Field of Search: None
• 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 36/0083 Determination of parameters used for hand-off, e.g. generation or modification of neighbour cell lists
• CPC Class Codes: H04W 36/0085 Hand-off measurements

Abstract

The present invention is a radio communication system that a radio terminal obtains measurement information indicated by a radio network in an idle state, and reports the obtained measurement information in an active state, the radio communication system comprising: a first radio station managing a first cell of a first radio access technology comprises in the first cell; notification means configured to notify the radio terminal of the first configuration information related to obtainment of the measurement information in the first cell; and instruction means configured to instruct the radio terminal to report information related to the measurement information obtained in the first cell after the radio terminal moves to a second cell of a second radio access technology different from the first radio access technology.

Claims

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

a first radio station configured to manage a first cell of a first radio access technology, comprising;

a memory storing instructions; and

a processor configured to execute the instructions to;

notify the radio terminal of first configuration information related to obtainment of first measurement information in the first cell;

instruct the radio terminal to report information related to the first measurement information obtained in the first cell after the radio terminal moves to a second cell of a second radio access technology different from the first radio access technology; and

request the radio terminal to obtain second measurement information in the second cell after the radio terminal moves to the second cell,

wherein the radio terminal reports to a second radio station;

a request reception notification that indicates reception of the request, or

second configuration information notified from the first radio station, the second configuration information being related to the obtainment of the second measurement information in the second cell.

2. The radio communication system according to claim 1,

wherein, to instruct the radio terminal to report information related to the first measurement information obtained in the first cell, the processor is further configured to execute the instructions to instruct the radio terminal to report, as information related to the first measurement information obtained in the first cell, whether the first measurement information obtained in the first cell is stored.

3. The radio communication system according to claim 1,

wherein the processor is further configured to execute the instructions to report to the second radio station managing the second cell, storing the first measurement information obtained in the first cell.

4. The radio communication system according to claim 1,

wherein the radio terminal obtains the second measurement information in the second cell by reusing at least some of the first configuration information after moving to the second cell.

5. A radio terminal that obtains first measurement information indicated by a network in an idle state, and reports the obtained first measurement information in an active state, the radio terminal comprising:

a memory storing instructions; and

a processor configured to execute the instructions to;

receive first configuration information related to obtainment of the first measurement information in a first cell from a first radio station managing the first cell of a first radio access technology;

receive an instruction to report information related to the first measurement information obtained in the first cell after moving to a second cell of a second radio access technology different from the first radio access technology;

report information related to the first measurement information in the second cell according to the instruction;

obtain second measurement information in the second cell according to a request from the first radio station to obtain the second measurement information in the second cell, after moving to the second cell;

receive, from the first radio station, a request including at least one of a message indicating the request and a notification message of second configuration information related to the obtainment of the second measurement information in the second cell; and

report to a second radio station;

a request reception notification that indicates reception of the request, or

the second configuration information notified from the first radio station.

6. The radio terminal according to claim 5, wherein, to report the information related to the first measurement information in the second cell, the processor is further configured to execute the instructions to:

report the first measurement information to the second radio station managing the second cell, the second radio station storing the first measurement information as information related to the first measurement information obtained in the first cell.

7. The radio terminal according to claim 6, wherein, to report the information related to the first measurement information in the second cell, the processor is further configured to execute the instructions to:

report in the second cell, the first measurement information including an identifier of the first radio access technology.

8. The radio terminal according to claim 5, wherein the processor is further configured to execute the instructions to:

store, in advance, information on a first measurement item and a second measurement item that serve as an obtainment target of the measurement information in each of the first cell and the second cell; and

change an obtainment target from the first item to the second item after moving from the first cell to the second cell.

9. The radio terminal according to claim 5, wherein the processor is further configured to execute the instructions to

obtain the second measurement information in the second cell by reusing at least some of the first configuration information after moving to the second cell.

10. The radio terminal according to claim 5, wherein, to obtain the first measurement information, the processor is further configured to

execute the instruction to obtain at least one of an absolute time, a logging duration, a logging interval, and a trace related information.

11. The radio terminal according to claim 10, wherein, to obtain the first measurement information, the processor is further configured to execute the instructions to:

measure at least one of the logging duration and the logging interval by a timer; and

continue at least one of a timer value for measuring the logging duration and a timer value for measuring the logging interval.

12. A radio terminal that obtains first measurement information indicated by a network in an idle state, and reports the obtained first measurement information in an active state, the radio terminal comprising:

a memory storing instructions; and

a processor configured to execute the instructions to;

receive first configuration information related to obtainment of the first measurement information in a first cell from a first radio station managing the first cell of a first radio access technology;

receive an instruction to report information related to the first measurement information obtained in the first cell after moving to a second cell of a second radio access technology different from the first radio access technology;

report information related to the first measurement information in the second cell according to the instruction;

add information indicating radio access technology corresponding to the obtained first measurement information when reporting the first measurement information; and

obtain second measurement information in the second cell according to a request from the first radio station to obtain the second measurement information in the second cell after moving to the second cell.

13. A radio station in a radio communication system that a radio terminal obtains first measurement information indicated by a network in an idle state, and reports the obtained first measurement information in an active state, wherein the radio station is a first radio station, manages a first cell of a first radio access technology, and comprises:

a memory storing instructions; and

a processor configured to execute the instructions to;

notify the radio terminal in the first cell of first configuration information related to obtainment of the first measurement information in the first cell;

instruct the radio terminal to report information related to the first measurement information obtained in the first cell after the radio terminal moves to a second cell of a second radio access technology different from the first radio access technology; and

request the radio terminal to obtain second measurement information in the second cell after the radio terminal moves to the second cell,

wherein the radio terminal reports to a second radio station;

a request reception notification that indicates reception of the request, or

second configuration information notified from the first radio station, the second configuration information being related to the obtainment of the second measurement information in the second cell.

14. The radio station according to claim 13, wherein, to instruct the radio terminal to report information related to the first measurement information obtained in the first cell, the processor is further configured to

execute the instructions to instruct the radio terminal to report, as information related to the first measurement information obtained in the first cell, whether the first measurement information obtained in the first cell is stored.

15. A network apparatus that instructs a first radio station to let a radio terminal to obtain first measurement information in an idle state, and to report the obtained first measurement information in an active state, the network apparatus comprising:

a memory storing instructions; and

a processor configured to execute the instructions to;

notify the first radio station managing a first cell of a first radio access technology where the radio terminal stays of configuration information related to obtainment of the first measurement information in the first cell by the radio terminal;

instruct the first radio station to let the radio terminal to report information related to the first measurement information obtained in the first cell after the radio terminal moves to a second cell of a second radio access technology different from the first radio access technology; and

instruct the first radio station to let the radio terminal to obtain second measurement information in the second cell after the radio terminal moves to the second cell,

wherein the radio terminal reports to the second radio station;

a request reception notification that indicates reception of the request, or

second configuration information notified from the first radio station, the second configuration information being related to the obtainment of the second measurement information in the second cell.

16. An information collecting method of a radio terminal for obtaining measurement information indicated by a radio network in an idle state, and reporting the obtained measurement information in an active state, the method comprising:

notifying, in a first cell of a first radio access technology, the radio terminal of first configuration information related to obtainment of the measurement information in the first cell;

requesting the radio terminal to report information related to the measurement information obtained in the first cell after the radio terminal moves to a second cell of a second radio access technology different from the first radio access technology; and

requesting the radio terminal to obtain second measurement information in the second cell after the radio terminal moves to the second cell,

wherein the radio terminal reports to a second radio station;

a request reception notification that indicates reception of the request, or

second configuration information notified from a first radio station, the second configuration information being related to the obtainment of the second measurement information in the second cell.

17. An information collecting method of a radio terminal for obtaining measurement information indicated by a radio network in an idle state, and reports the obtained measurement information in an active state, the method comprising:

receiving, from a first radio station managing a first cell of a first radio access technology in which the radio terminal stays, configuration information related to obtainment of the measurement information in the first cell and an instruction to report information related to the measurement information obtained in the first cell after the radio terminal moves to a second cell of a second radio access technology different from the first radio access technology;

reporting, to a second radio station managing the second cell, the information related to the measurement information according to the instruction;

receiving a request from the first radio station to obtain second measurement information in the second cell, after moving to the second cell;

obtaining the second measurement information in the second cell according to the request;

receiving, from the first radio station, a request including at least one of a message indicating the request and a notification message of second configuration information related to the obtainment of the second measurement information in the second cell; and

reporting to the second radio station;

a request reception notification that indicates reception of the request, or

the second configuration information notified from the first radio station.