Method and device for initiating cell measurement

• US 20120196647A1
• Filed: 12/30/2009
• Published: 08/02/2012
• Est. Priority Date: 08/17/2009
• Status: Active Grant

• Current Assignee: ZTE Corporation
• Original Assignee: ZTE Corporation
• Inventors: Chen, Zhongming, Shi, Xiaojuan, Huang, Yada, Du, Zhongda, Deng, Yun
• Granted Patent: US 9,198,097 B2
• Time in Patent Office: Days
• US Class Current: 455/525
• 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 36/00837 Determination of triggering parameters for hand-off
• CPC Class Codes: H04W 36/0085 Hand-off measurements
• CPC Class Codes: H04W 84/045 using private Base Stations, e.g. femto Base Stations, home Node B

Abstract

The disclosure provides a method and device for initiating cell measurement. The method comprises: pre-setting an initiating condition for initiating the measurement of a Closed Subscriber Group (CSG) cell and/or a Hybrid cell; when the initiating condition is satisfied, initiating the measurement of the CSG cells and/or Hybrid cells by a User Equipment (UE). The UE automatically initiates the measurement of the CSG cell and/or Hybrid cell when the UE is close to its own footprint area or fingerprint area. By using the disclosure, even if the signal quality of a serving cell is sufficient, the UE can initiate the measurement of a CSG cell or Hybrid cell and hand over to the CSG cell or Hybrid cells, reducing load of a macro cell.

Claims

1. A method for initiating cell measurement, comprising:

pre-setting an initiating condition for initiating measurement of a Closed Subscriber Group (CSG) cell and/or Hybrid cell;

initiating the measurement of the CSG cell and/or Hybrid cell by a User Equipment (UE) when the initiating condition is satisfied.

2. The method according to claim 1, wherein the initiating condition is:

a pre-set Reference Signal Received Power (RSRP) value s-Measure1;

satisfying the initiating condition is;

a servingRSRP, which is a RSRP value of a serving cell and filtered by a layer 3, is lower than the s-Measure1;

or

satisfying the initiating condition is;

the UE receives an instruction from a network side.

3. The method according to claim 2, further comprising:

when the initiating condition is pre-set RSRP values which are s-Measure and s-Measure1,

performing measurement of all measurement tasks by the UE when the servingRSRP is lower than the s-Measure;

wherein a measurement object comprises all cells on a designated carrier frequency in the measurement tasks;

performing no measurement of all the measurement tasks by the UE when the servingRSRP is higher than the s-Measure1.

4. The method according to claim 3, wherein the s-Measure1 is notified to the UE by the network side through a measurement control message or is set as a default value.

5. The method according to claim 4, wherein when the s-Measure1 is set as a default value, the default value is an infinite value or the servingRSRP.

6. The method according to claim 4, wherein the s-Measure1 is set aiming at all the carrier frequencies;

or

the s-Measure1 is respectively set aiming at each carrier frequency;

or

the s-Measure1 is set aiming at multiple carrier frequencies.

7. The method according to claim 6, wherein the s-Measure1 is further set aiming at the CSG cell and/or Hybrid cell on one carrier frequency or multiple carrier frequencies or all the carrier frequencies;

or

the s-Measure1 is further set aiming at all the cells on one carrier frequency or multiple carrier frequencies.

8. The method according to claim 1, wherein satisfying the initiating condition is:

the UE is close to its own footprint area or fingerprint area, and automatically initiates the measurement of the CSG cell and/or Hybrid cell.

9. The method according to claim 8, further comprising:

performing the measurement of the measurement task according to an existing mode by the UE, when the UE departs from its own footprint area or fingerprint area or enters its own footprint area or fingerprint area.

10. The method according to claim 2, further comprising:

when the UE is close to its own footprint area or fingerprint area,

reporting a proximity instruction to the network side by the UE;

wherein the proximity instruction contains information of the frequency on which the CSG cell or Hybrid cell is, in historical information stored by the UE;

configuring a measurement task aiming at the received frequency information and sending the measurement task to the UE by the network side;

wherein a measurement object is the received frequency.

11. The method according to claim 10, wherein the proximity instruction also contains the servingRSRP.

12. The method according to claim 10, wherein the s-Measure1 is set aiming at the frequency received by the network side.

13. The method according to claim 2, further comprising:

reporting a measurement report to the network side by the UE;

after receiving the measurement report from the UE, if determining to perform a handover, sending a handover command to the UE by the network side after a handover preparation process is finished and instructing cancelling of configuration of the s-Measure1 or cancelling of measurement of an inter-frequency at the same time;

after receiving the handover command, performing the handover, and deleting the s-Measure1 by the UE at the same time;

if determining not to perform a handover, informing the UE to delete the s-Measure1 by the network side when the UE departs from its own footprint area or fingerprint area and reports a departure instruction;

or after receiving the handover command, automatically deleting the s-Measure1 by the UE.

14. A device for initiating cell measurement, comprising a setting module, an initiating module and a measuring module;

wherein

the setting module is arranged to set and store an initiating condition for initiating measurement of a CSG cell and/or Hybrid cell;

the initiating module is arranged to send a measurement notice to the measuring module when the initiating condition is satisfied;

the measuring module is arranged to receive the measurement notice from the initiating module and initiate the measurement of the CSG cell and/or Hybrid cell.

15. The device according to claim 14, wherein the initiating module is further arranged to receive a servingRSRP, and send the measurement notice to the measuring module when the received servingRSRP satisfies the initiating condition.

16. The device according to claim 15, wherein the initiating module is further arranged to determine whether a UE is close to its own footprint area or fingerprint area.

17. A method for initiating cell measurement, comprising:

pre-setting an initiating condition for initiating measurement of a cell on a carrier frequency;

initiating the measurement of the cell on the carrier frequency by a UE when the initiating condition is satisfied;

satisfying the initiating condition is;

for a RSRP value s-Measure which is set aiming at different carrier frequencies, when a servingRSRP, which is a RSRP value of a serving cell and filtered by a layer 3, is lower than the s-Measure, initiating the measurement of the cell on the carrier frequency;

or

satisfying the initiating condition is;

the UE receives an instruction from a network side.

18. The method according to claim 17, wherein the cell is a CSG cell and/or Hybrid cell;

the initiating condition further is;

the set s-Measure aiming at the carrier frequency on which the CSG cell and/or Hybrid cell is, is different from that aiming at other carrier frequencies;

wherein there is one carrier frequency or multiple carrier frequencies on which the CSG cell and/or Hybrid cell is.

19. The method according to claim 18, wherein the carrier frequency is dedicated to the CSG cell and/or Hybrid cell;

or the carrier frequency is shared by the CSG cell and/or Hybrid cell as well as a macro cell.

20. The method according to claim 18, wherein the s-Measure is notified to the UE by the network side through a measurement control message, or is set as a default value.

21. The method according to claim 20, when the s-Measure is set as a default value, the default value is an infinite value or the servingRSRP.

22. The method according to claim 18, further comprising:

the UE being close to its footprint area or fingerprint area, and automatically initiating the measurement of the cell.

23. The method according to claim 22, further comprising:

performing the measurement of a measurement task according to an existing mode by the UE when the UE departs from its own footprint area or fingerprint area or enters its own footprint area or fingerprint area.

24. The method according to claim 18, further comprising:

when the UE is close to its own footprint area or fingerprint area,

reporting a proximity instruction to the network side by the UE;

wherein the proximity instruction contains information of a frequency on which a cell is, in historical information stored by the UE;

configuring a measurement task aiming at the received frequency information by the network side and sending the measurement task to the UE;

a measurement object is the received frequency.

25. The method according to claim 24, wherein the proximity instruction further contains the servingRSRP.

26. The method according to claim 24, wherein the s-Measure is set aiming at the frequency received by the network side.