Method and device for selectively performing operation on basis of terminal operation mode

• US 10,237,827 B2
• Filed: 07/04/2016
• Issued: 03/19/2019
• Est. Priority Date: 07/02/2015
• Status: Active Grant

• Current Assignee: Korea Advanced Institute of Science and Technology, LG Electronics, Inc. (LG Corporation)
• Original Assignee: Korea Advanced Institute of Science and Technology, LG Electronics, Inc. (LG Corporation)
• Inventors: Bang, Inkyu, Kim, JaYeong, Sung, Dan Keun, Yi, Yunjung, Kim, Kijun
• Primary Examiner(s): Pham, Tuan
• Application Number:
  US15/741,169
• Publication Number:
  US 20180199290A1
• Time in Patent Office: 988 Days
• CPC Class Codes: H04W 24/02 Arrangements for optimising operational condition
• CPC Class Codes: H04W 24/08 Testing, supervising or monitoring using real traffic
• CPC Class Codes: H04W 36/30 by measured or perceived connection quality data
• CPC Class Codes: H04W 36/304 due to measured or perceived resources with higher communication quality
• CPC Class Codes: H04W 52/02 Power saving arrangements in wired systems H04L12/12; signaling of mobile application services, e.g. low battery notifications H04W4/20
• CPC Class Codes: H04W 52/0245 according to signal strength
• CPC Class Codes: H04W 52/0277 according to available power supply, e.g. switching off when a low battery condition is detected
• CPC Class Codes: H04W 72/12 Wireless traffic scheduling
• CPC Class Codes: H04W 72/542 using measured or perceived quality
• CPC Class Codes: H04W 76/28 Discontinuous transmission [DTX]; Discontinuous reception [DRX]
• CPC Class Codes: Y02D 30/70 in wireless communication networks

Abstract

Provided are a method by which a terminal selectively performs an operation on the basis of a terminal operation mode in a wireless communication system, and a device for supporting the method. The terminal determines a terminal group to which the terminal belongs, on the basis of a battery residual quantity and a battery residual quantity threshold value, calculates channel quality on the basis of a downlink reference signal, determines a terminal operation mode on the basis of the determined terminal group, the calculated channel quality, and the channel quality threshold value, and performs an operation on the basis of the determined terminal operation mode, wherein the terminal group can be any one of an energy insufficient group (EIG) and an energy sufficient group (ESG).

Claims

1. A method for selectively performing, by a user equipment (UE), an operation based on a UE operation mode in a wireless communication system, the method comprising:

determining a UE group to which the UE belongs based on a remaining battery level and a remaining battery threshold value;

calculating channel quality based on a downlink reference signal;

determining a UE operation mode based on the determined UE group, the calculated channel quality, and a channel quality threshold value; and

performing an operation based on the determined UE operation mode,

wherein the UE group is either an energy-insufficient group (EIG) or an energy-sufficient group (ESG).

2. The method of claim 1, wherein when the determined UE group is the EIG, the calculated channel quality is equal to or less than the channel quality threshold value, and the UE is not scheduled to be handed over, the UE operation mode is determined to be a battery efficiency mode.

3. The method of claim 2, wherein the remaining battery level is equal to or less than the remaining battery threshold value.

4. The method of claim 3, further comprising stopping, by the UE, data transmission and reception until the channel quality exceeds the channel quality threshold value.

5. The method of claim 3, further comprising setting, by the UE, off-duration for stopping data transmission and reception.

6. The method of claim 5, wherein the off-duration is set by the UE based on the calculated channel quality, the channel quality threshold value, and a delay constraint of the UE.

7. The method of claim 3, further comprising transmitting, by the UE, a battery efficiency mode indicator to a base station (BS).

8. The method of claim 1, wherein when the determined UE group is the EIG, the calculated channel quality is equal to or less than the channel quality threshold value, and the UE is scheduled to be handed over, the UE operation mode is determined to be a handover preparation mode.

9. The method of claim 8, further comprising transmitting, by the UE, a handover candidate BS index to a BS, wherein the handover candidate BS index is set by the UE based on a reference signal measurement.

10. The method of claim 1, wherein when the determined UE group is the EIG and the calculated channel quality exceeds the channel quality threshold value, the UE operating mode is determined to be a normal mode.

11. The method of claim 1, further comprising transmitting, by the UE, a channel feedback format corresponding to the determined UE operation mode to a BS.

12. The method of claim 1, further comprising transmitting, by the UE, a changed UE group to a BS when the UE group to which the UE belongs is changed,

wherein:

when the UE is in an RRC_CONNECTED mode, the changed UE group is transmitted to the BS using a channel feedback format; and

when the UE is in an RRC_IDLE mode, the changed UE group is transmitted to the BS using a random access procedure.

13. A user equipment (UE) for selectively performing an operation based on a UE operation mode 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;

determine a UE group to which the UE belongs based on a remaining battery level and a remaining battery threshold value;

calculate channel quality based on a downlink reference signal;

determine a UE operation mode based on the determined UE group, the calculated channel quality, and a channel quality threshold value; and

perform an operation based on the determined UE operation mode, and

the UE group is either an energy-insufficient group (EIG) or an energy-sufficient group (ESG).