Method by which terminal performs frequency measurement, and device
A method by which a terminal performs frequency measurement in a wireless communication system, and a device for supporting the same are provided. The terminal receives an intra-frequency measurement threshold value and an inter-frequency measurement threshold value for a reduced performance measurement group, measures a signal level of a serving cell, and performs frequency measurement on the basis of the measured signal level of the serving cell and the received threshold values, wherein the intra-frequency measurement threshold value can be larger than the inter-frequency measurement threshold value for the reduced performance measurement group.
1. A method for performing, by a user equipment (UE), frequency measurement in a wireless communication system, the method comprising:
receiving an intra-frequency measurement threshold value and an inter-frequency measurement threshold value for a reduced performance measurement group;
receiving an inter-frequency measurement threshold value for a normal performance measurement group;
measuring a signal level of a serving cell; and
performing frequency measurement based on the measured signal level of the serving cell and the received threshold values,
wherein the intra-frequency measurement threshold value is greater than the inter-frequency measurement threshold value for the reduced performance measurement group, and
wherein the inter-frequency measurement threshold value for the reduced performance measurement group is greater than the inter-frequency measurement threshold value for the normal performance measurement group.
2. The method of claim 1 , wherein based on the measured signal level of the serving cell being smaller than the inter-frequency measurement threshold value for the reduced performance measurement group, the frequency measurement is reduced inter-frequency measurement.
3. The method of claim 2 , wherein the reduced inter-frequency measurement requires a smaller number of samplings for frequency measurement than normal inter-frequency measurement.
4. The method of claim 1 , wherein the signal level of the serving cell is at least one of a power of the serving cell or a quality of the serving cell.
5. The method of claim 1 , wherein the UE is a machine-type communication (MTC) UE.
6. The method of claim 1 , wherein based on the measured signal level of the serving cell being smaller than the inter-frequency measurement threshold value for the reduced performance measurement group and being greater than the inter-frequency measurement threshold value for the normal performance measurement group, the frequency measurement is reduced inter-frequency measurement.
7. The method of claim 6 , wherein the reduced inter-frequency measurement requires a smaller number of samplings for frequency measurement than normal inter-frequency measurement.
8. The method of claim 1 , wherein based on the measured signal level of the serving cell being smaller than the inter-frequency measurement threshold value for the normal performance measurement group, the frequency measurement is normal inter-frequency measurement.
9. The method of claim 1 , wherein the intra-frequency measurement threshold value and the inter-frequency measurement threshold value for the reduced performance measurement group are broadcast from a network.
10. A user equipment (UE) for performing frequency measurement in a wireless communication system, the UE comprising:
a memory;
a transceiver; and
a processor to connect the memory and the transceiver,
wherein the processor is configured to:
control the transceiver to receive an intra-frequency measurement threshold value and an inter-frequency measurement threshold value for a reduced performance measurement group;
control the transceiver to receive an inter-frequency measurement threshold value for a normal performance measurement group;
measure a signal level of a serving cell; and
perform frequency measurement based on the measured signal level of the serving cell and the received threshold values,
wherein the intra-frequency measurement threshold value is greater than the inter-frequency measurement threshold value for the reduced performance measurement group, and
wherein the inter-frequency measurement threshold value for the reduced performance measurement group is greater than the inter-frequency measurement threshold value for the normal performance measurement group.
11. The UE of claim 10 , wherein based on the measured signal level of the serving cell being smaller than the inter-frequency measurement threshold value for the reduced performance measurement group, the frequency measurement is reduced inter-frequency measurement.
12. The UE of claim 10 , wherein the UE is a machine-type communication (MTC) UE.
13. The UE of claim 10 , wherein based on the measured signal level of the serving cell being smaller than the inter-frequency measurement threshold value for the reduced performance measurement group and being greater than the inter-frequency measurement threshold value for the normal performance measurement group, the frequency measurement is reduced inter-frequency measurement.