Method and apparatus for saving power of user equipment in wireless communication system

• US 10,182,453 B2
• Filed: 07/07/2014
• Issued: 01/15/2019
• Est. Priority Date: 02/21/2011
• Status: Active Grant

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: Jeong, Kyeongin, Kim, Soenghun
• Primary Examiner(s): Liu, Jung
• Application Number:
  US14/324,622
• Publication Number:
  US 20140321388A1
• Time in Patent Office: 1,653 Days
• CPC Class Codes: H04W 24/10 Scheduling measurement reports ; Arrangements for measurement reports
• 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 52/0209 in terminal devices terminal devices per se H04W88/02
• CPC Class Codes: H04W 52/0212 managed by the network, e.g. network or access point is master and terminal is slave
• CPC Class Codes: H04W 52/0235 where the received signal is a power saving command
• CPC Class Codes: H04W 72/23 in the downlink direction of a wireless link, i.e. towards a terminal
• CPC Class Codes: Y02D 30/70 in wireless communication networks

Abstract

An apparatus and method for improved power saving in a User Equipment (UE) supporting enhanced Inter-Cell Interference Coordination/Time-domain ICIC (eICIC/Time-domain ICIC) are provided. The power saving method includes receiving control information including a reference pattern for a power saving mode from a base station, determining whether the terminal is configured to operate in the power saving mode, and determining, when the terminal is configured to operate in the power saving mode, whether to decode a downlink control channel according to the reference pattern.

Claims

1. A method by a terminal in a wireless communication system, the method comprising:

receiving control information including a measurement comparison threshold value and pattern information;

determining whether a channel measurement value is less than the threshold value;

decoding a downlink control channel including scheduling information for unicast data of the terminal in an almost blank subframe (ABS) indicated by the pattern information if the channel measurement value is equal to or greater than the threshold value; and

skipping the decoding of the downlink control channel in the ABS if the channel measurement value is less than the threshold value,

wherein respective pattern information corresponds to respective measurement comparison threshold value.

2. The method of claim 1, wherein the pattern information comprises mapping information on a time domain of a resource allocated to the terminal.

3. The method of claim 1, wherein the pattern information comprises mapping information corresponding to subframes of a resource allocated to the terminal.

4. The method of claim 3, wherein the downlink control channel is received at a subframe indicated by the mapping information.

5. The method of claim 1, wherein the pattern information is configured in a bitmap format.

6. The method of claim 1, further comprising:

determining whether to decode the downlink control channel based on the pattern information and the measurement comparison threshold value.

7. A terminal in a wireless communication system, the terminal comprising:

a transceiver configured to transmit and receive a signal; and

a controller configured to;

receive control information including a measurement comparison threshold value and pattern information,

determine whether a channel measurement value is less than the threshold value,

decode a downlink control channel including scheduling information for unicast data of the terminal in an almost blank subframe (ABS) indicated by the pattern information if the channel measurement value is equal to or greater than the threshold value, and

skip decoding of the downlink control channel in the ABS if the channel measurement value is less than the threshold value,

wherein respective pattern information corresponds to respective measurement comparison threshold value.

8. The terminal of claim 7, wherein the pattern information comprises mapping information on a time domain of a resource allocated to the terminal.

9. The terminal of claim 7, wherein the pattern information comprises mapping information corresponding to subframes of a resource allocated to the terminal.

10. The terminal of claim 9, wherein the downlink control channel is received at a subframe indicated by the mapping information.

11. The terminal of claim 7, wherein the pattern information is configured in a bitmap format.

12. The terminal of claim 7, wherein the controller is further configured to determine whether to decode the downlink control channel based on the pattern information and the measurement comparison threshold value.

13. A method by a base station in a wireless communication system, the method comprising:

transmitting control information including a measurement comparison threshold value and pattern information; and

transmitting a downlink control channel including scheduling information for unicast data of a terminal in an almost blank subframe (ABS) indicated by the pattern information,

wherein the downlink control channel is decoded if a channel measurement value is equal to or greater than the threshold value,

wherein decoding of the downlink control channel is skipped if the channel measurement value is less than the threshold value,

wherein the pattern information comprises mapping information corresponding to subframes of a resource allocated to the terminal, and

wherein respective pattern information corresponds to respective measurement comparison threshold value.

14. The method of claim 13, wherein the mapping information is configured in a bitmap format.

15. The method of claim 13, wherein the pattern information and the measurement comparison threshold value are used for determining whether to decode, by the terminal, the downlink control channel at a subframe indicated by the mapping information.

16. A base station in a wireless communication system, the base station comprising:

a transceiver configured to transmit and receive a signal; and

a controller configured to;

transmit control information including a measurement comparison threshold value and pattern information, and

transmit a downlink control channel including scheduling information for unicast data of a terminal in an almost blank subframe (ABS) indicated by the pattern information,

wherein the downlink control channel is decoded if a channel measurement value is equal to or greater than the threshold value,

wherein decoding of the downlink control channel is skipped if the channel measurement value is less than the threshold value,

wherein the pattern information comprises mapping information corresponding to subframes of a resource allocated to the terminal, and

wherein respective pattern information corresponds to respective measurement comparison threshold value.

17. The base station of claim 16, wherein the mapping information is configured in a bitmap format.

18. The base station of claim 16, wherein the pattern information and the measurement comparison threshold value are used for determining whether to decode, by the terminal, the downlink control channel at a subframe indicated by the mapping information.