Method for reducing power consumption of terminal in mobile communication system using multi-carrier structure

• US 10,405,277 B2
• Filed: 07/25/2017
• Issued: 09/03/2019
• Est. Priority Date: 10/01/2009
• Status: Active Grant

• Current Assignee: Electronics and Telecommunications Research Institute
• Original Assignee: Electronics and Telecommunications Research Institute
• Inventors: Lee, Kyoung Seok, Kim, Jae Heung, Noh, Tae Gyun
• Primary Examiner(s): Cheng, Chi Tang P
• Application Number:
  US15/659,339
• Publication Number:
  US 20170325168A1
• Time in Patent Office: 770 Days
• Field of Search: 370311
• CPC Class Codes: H04L 5/001 the frequencies being arranged in component carriers
• CPC Class Codes: H04L 5/0053 Allocation of signaling, i.e. of overhead other than pilot signals
• CPC Class Codes: H04L 5/0096 Indication of changes in allocation
• CPC Class Codes: H04L 5/0098 Signalling of the activation or deactivation of component carriers, subcarriers or frequency bands
• CPC Class Codes: H04L 5/06 the signals being represented by different frequencies combined with time-division multiplexing H04L5/26
• CPC Class Codes: H04L 5/14 Two-way operation using the same type of signal, i.e. duplex
• CPC Class Codes: H04L 5/16 Half-duplex systems; Simplex/duplex switching; Transmission of break signals non-automatically inverting the direction of transmission
• CPC Class Codes: H04L 5/18 Automatic changing of the traffic direction
• CPC Class Codes: H04L 5/26 combined with the use of different frequencies
• CPC Class Codes: H04W 28/0221 power availability or consumption
• CPC Class Codes: H04W 28/0263 involving mapping traffic to individual bearers or channels, e.g. traffic flow template [TFT]
• CPC Class Codes: H04W 28/0278 using buffer status reports dynamic wireless traffic scheduling definition H04W72/12
• 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 52/0216 using a pre-established activity schedule, e.g. traffic indication frame
• CPC Class Codes: H04W 52/0219 where the power saving management affects multiple terminals
• CPC Class Codes: H04W 52/0222 in packet switched networks
• CPC Class Codes: H04W 52/0225 using monitoring of external events, e.g. the presence of a signal
• CPC Class Codes: H04W 52/0229 where the received signal is a wanted signal
• CPC Class Codes: H04W 52/0232 according to average transmission signal activity
• CPC Class Codes: H04W 52/0235 where the received signal is a power saving command
• CPC Class Codes: H04W 52/0261 : managing power supply demand, e.g. depending on battery level
• CPC Class Codes: H04W 52/0264 : by selectively disabling software applications
• CPC Class Codes: H04W 52/0274 : by switching on or off the equipment or parts thereof
• 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 52/028 : switching on or off only a part of the equipment circuit blocks
• CPC Class Codes: H04W 52/0283 : with sequential power up or power down of successive circuit blocks, e.g. switching on the local oscillator before RF or mixer stages
• CPC Class Codes: H04W 72/23 : in the downlink direction of a wireless link, i.e. towards a terminal
• CPC Class Codes: H04W 76/27 : Transitions between radio resource control [RRC] states
• CPC Class Codes: H04W 76/28 : Discontinuous transmission [DTX]; Discontinuous reception [DRX]
• CPC Class Codes: H04W 88/02 : Terminal devices
• CPC Class Codes: H04W 88/08 : Access point devices
• CPC Class Codes: Y02D 30/70 : in wireless communication networks

Abstract

A method for reducing power consumption of a terminal that communicates with a base station in a mobile communication system using a multi-carrier structure composed of a primary component carrier and at least one secondary component carrier comprises: receiving a discontinuous reception (DRX) parameter group for multi carriers from the base station; and setting the multi carriers to the same parameter value, by using the received parameter group. The method for reducing power consumption of the terminal further comprises: performing a downlink control channel receive operation on each carrier according to a DRX cycle. As the base station in the mobile communication system using the multi-carrier structure simplifies the DRX process for reducing power consumption of a terminal by reducing signaling load for the multi-carrier control of the terminal, it becomes possible to reduce power consumption of the terminal.

Claims

1. A communication method, comprising:

receiving, by a user equipment (UE), a first message comprising first information about a first discontinuous reception cycle from a base station;

monitoring, by the UE, a physical downlink control channel (PDCCH) on a first component carrier based on the first discontinuous reception cycle;

receiving, by the UE, first control information through the PDCCH on the first component carrier;

receiving, by the UE, a second message from the base station based on the first control information, the second message related to a second discontinuous reception cycle;

in response to receiving the second message, monitoring, by the UE, the PDCCH on the first component carrier based on the second discontinuous reception cycle;

receiving, by the UE, second control information through the PDCCH on the first component carrier; and

receiving, by the UE, user data through a physical downlink shared channel (PDSCH) on a second component carrier based on the second control information,

wherein the second discontinuous reception cycle is shorter than the first discontinuous reception cycle, and

wherein the second control information comprises a carrier indicator (CI) indicating the second component carrier.

2. The method of claim 1, wherein:

the first message further comprises second information indicating a first period during which the UE monitors the PDCCH and a second period during which the UE does not monitor the PDCCH, wherein the first discontinuous reception cycle comprises the first period and the second period.

3. The method of claim 1, wherein the second message is received through a physical downlink shared channel (PDSCH).

4. The method of claim 1, wherein the first and second messages are radio resource control (RRC) messages.

5. An apparatus, comprising:

a memory; and

a processor operably coupled to the memory,

wherein the processor, when executing program instructions stored in the memory, is configured to;

cause the apparatus to receive a first message comprising first information about a first discontinuous reception cycle from a base station;

cause the apparatus to monitor a physical downlink control channel (PDCCH) on a first component carrier based on the first discontinuous reception cycle;

cause the apparatus to receive first control information through the PDCCH on the first component carrier;

cause the apparatus to receive a second message from the base station based on the first control information, the second message related to a second discontinuous reception cycle;

cause the apparatus to monitor, in response to receiving the second message, the PDCCH on the first component carrier based on the second discontinuous reception cycle;

cause the apparatus to receive second control information through the PDCCH on the first component carrier; and

cause the apparatus to receive user data through a physical downlink shared channel (PDSCH) on a second component carrier based on the second control information,

wherein the second discontinuous reception cycle is shorter than the first discontinuous reception cycle, and

wherein the second control information comprises a carrier indicator (CI) indicating the second component carrier.

6. The apparatus of claim 5, wherein the first message further comprises second information indicating a first period during which the apparatus monitors the PDCCH and a second period during which the apparatus does not monitor the PDCCH, wherein the first discontinuous reception cycle comprises the first period and the second period.

7. The apparatus of claim 5, wherein the second message is received through a physical downlink shared channel (PDSCH).

8. The apparatus of claim 5, wherein the first and second messages are radio resource control (RRC) messages.

9. A communication method, comprising:

transmitting, by an e-Node B (eNB), a first message to a user equipment (UE), the first message comprising first information about a first discontinuous reception cycle;

transmitting, by the eNB, a physical downlink control channel (PDCCH) on a first component carrier based on the first discontinuous reception cycle;

transmitting, by the eNB, first control information through the PDCCH on the first component carrier;

transmitting, by the eNB, a second message based on the first control information, the second message related to a second discontinuous reception cycle;

in response to transmitting the second message, transmitting, by the eNB, the PDCCH on the first component carrier based on the second discontinuous reception cycle;

transmitting, by the eNB, second control information through the PDCCH on the first component carrier; and

transmitting, by the eNB, user data through a physical downlink shared channel (PDSCH) on a second component carrier based on the second control information,

wherein the second discontinuous reception cycle is shorter than the first discontinuous reception cycle, and

wherein the second control information comprises a carrier indicator (CI) indicating the second component carrier.

10. The method of claim 9, wherein:

the first message further comprises second information indicating a first period during which the UE monitors the PDCCH and a second period during which the UE does not monitor the PDCCH, wherein the first discontinuous reception cycle comprises the first period and the second period.

11. The method of claim 9, wherein the second message is transmitted through a physical downlink shared channel (PDSCH).

12. The method of claim 9, wherein the first and second messages are radio resource control (RRC) messages.

13. An apparatus, comprising:

a memory; and

a processor operably coupled to the memory,

wherein the processor, when executing program instructions stored in the memory, is configured to;

cause the apparatus to transmit a first message to a user equipment (UE), the first message comprising first information about a first discontinuous reception cycle;

cause the apparatus to transmit a physical downlink control channel (PDCCH) on a first component carrier based on the first discontinuous reception cycle;

cause the apparatus to transmit first control information through the PDCCH on the first component carrier;

cause the apparatus to transmit a second message based on the first control information, the second message related to a second discontinuous reception cycle;

cause the apparatus to, in response to transmitting the second message, transmit the PDCCH on the first component carrier based on the second discontinuous reception cycle;

cause the apparatus to transmit second control information through the PDCCH on the first component carrier; and

cause the apparatus to transmit user data through a physical downlink shared channel (PDSCH) on a second component carrier based on the second control information,

wherein the second discontinuous reception cycle is shorter than the first discontinuous reception cycle, and

wherein the second control information comprises a carrier indicator (CI) indicating the second component carrier.

14. The apparatus of claim 13, wherein:

the first message further comprises second information indicating a first period during which the UE monitors the PDCCH and a second period during which the apparatus does not monitor the PDCCH, wherein the first discontinuous reception cycle comprises the first period and the second period.

15. The apparatus of claim 13, wherein the second information is transmitted through a physical downlink shared channel (PDSCH).

16. The apparatus of claim 13, wherein the first and second messages are radio resource control (RRC) messages.

17. A device for a user equipment (UE), comprising:

a memory; and

a processor operably coupled to the memory,

wherein the processor, when executing program instructions stored in the memory, is configured to;

cause the UE to receive a first message comprising first information about a first discontinuous reception cycle from a base station;

cause the UE to monitor a physical downlink control channel (PDCCH) on a first component carrier based on the first discontinuous reception cycle;

cause the UE to receive first control information through the PDCCH on the first component carrier;

cause the UE to receive a second message from the base station based on the first control information, the second message related to a second discontinuous reception cycle;

cause the UE to monitor, in response to receiving the second message, the PDCCH on the first component carrier based on the second discontinuous reception cycle;

cause the UE to receive second control information through the PDCCH on the first component carrier; and

cause the UE to receive user data through a physical downlink shared channel (PDSCH) on a second component carrier based on the second control information,

wherein the second discontinuous reception cycle is shorter than the first discontinuous reception cycle, and

wherein the second control information comprises a carrier indicator (CI) indicating a second component carrier.

18. The device of claim 17, wherein the first message further comprises second information indicating a first period during which the UE monitors the PDCCH and a second period during which the UE does not monitor the PDCCH, wherein the first discontinuous reception cycle comprises the first period and the second period.

19. The device of claim 17, wherein the second message is received through a physical downlink shared channel (PDSCH).

20. The device of claim 17, wherein the first and second messages are radio resource control (RRC) messages.