Method and apparatus for transmit signal power control and discovery signal resource multiplexing in wireless communication system

• US 10,506,521 B2
• Filed: 10/06/2014
• Issued: 12/10/2019
• Est. Priority Date: 10/08/2013
• Status: Active Grant

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: Oh, Jinyoung, Kwak, Yongjun, Lee, Hyojin, Ji, Hyoungju
• Primary Examiner(s): Sefcheck, Gregory B
• Application Number:
  US15/028,159
• Publication Number:
  US 20160249297A1
• Time in Patent Office: 1,891 Days
• Field of Search: None
• CPC Class Codes: H04B 7/0626 Channel coefficients, e.g. channel state information [CSI]
• CPC Class Codes: H04L 1/1861 Physical mapping arrangements for ACK signaling see also H04L5/0053
• CPC Class Codes: H04L 5/26 combined with the use of different frequencies
• CPC Class Codes: H04W 48/16 Discovering, processing access restriction or access information
• CPC Class Codes: H04W 52/143 Downlink power control
• CPC Class Codes: H04W 52/242 taking into account path loss
• CPC Class Codes: H04W 52/243 taking into account interferences
• CPC Class Codes: H04W 52/281 taking into account user or data type priority
• CPC Class Codes: H04W 52/30 using constraints in the total amount of available transmission power
• CPC Class Codes: H04W 52/325 Power control of control or pilot channels
• CPC Class Codes: H04W 52/383 power control in peer-to-peer links
• CPC Class Codes: H04W 52/386 centralized, e.g. when the radio network controller or equivalent takes part in the power control
• CPC Class Codes: H04W 72/0473 the resource being transmission power
• CPC Class Codes: H04W 76/14 Direct-mode setup
• CPC Class Codes: H04W 8/005 Discovery of network devices, e.g. terminals

Abstract

A method for transmitting and receiving a signal in a base station of a mobile communication system according to an embodiment of the present specification comprises the steps of: generating power control information for device to device (D2D) communication for a terminal; and transmitting, to the terminal, a message including an indicator indicative of a power control mode of the terminal in accordance with the generated power control information. In accordance with a method for controlling transmit power of a terminal and a method for selecting a transmit resource in a mobile communication system provided in an embodiment of the present specification, mutual interference between the device to device communication and cellular communication can be reduced, and the communication efficiency can be improved.

Claims

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

acquiring information for a maximum uplink transmission power;

receiving, from a base station, downlink control information on a physical downlink control channel of a first link between the terminal and the base station, the downlink control information including power control information indicating a power control method of a second link between terminals as a first method or a second method and information on resources for transmitting at least one signal via the second link;

identifying that a transmission power of the at least one signal via the second link is the maximum uplink transmission power, in a case that the power control information for the second link indicates the first method;

identifying the transmission power of the at least one signal via the second link based on the maximum uplink transmission power, a resource for transmitting the at least one signal and information on a path loss, in a case that the power control information related to the second link indicates the second method; and

transmitting the at least one signal on the second link based on the identified transmission power,

wherein the resource for transmitting the at least one signal is identified based on the information on resources for transmitting the at least one signal.

2. The method of claim 1, further comprising:

receiving, from the base station, information on power control information via the first link.

3. The method of claim 2, wherein the transmission power is further identified based on the power control information via the first link in the case that the power control information indicates the second method.

12. The base station of claim 1,

wherein the transmission power is further identified based on the power control information via the first link in the case that the power control information indicates the second method.

4. A method by a base station in a mobile communication system, the method comprising:

transmitting, to a terminal, information for a maximum uplink transmission power;

identifying downlink control information;

transmitting, to the terminal, the downlink control information on a physical downlink control channel of a first link between the terminal and the base station, the downlink control information including power control information indicating indicates a power control method of a second link between terminals as a first method or a second method and information on resources for transmitting at least one signal via the second link,

wherein a transmission power of the at least one signal via the second link is identified as the maximum uplink transmission power, in a case that the power control information for the second link indicates the first method,

wherein the transmission power of the at least one signal via the second link is identified based on the maximum uplink transmission power, a resource for transmitting the at least one signal and information on a path loss, in a case that the power control information for the second link indicates the second method, and

wherein at least one signal on the second link is transmitted based on the identified transmission power. and

wherein the resource for transmitting the at least one signal is identified based on the information on resources for transmitting the at least one signal.

5. The method of claim 4, further comprising:

transmitting, to the terminal, information on power control information via the first link.

6. The method of claim 5,

wherein the transmission power is further identified based on the power control information via the first link in the case that the power control information indicates the second method.

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

a transceiver; and

a controller coupled to the transceiver and configured to;

acquire information for a maximum uplink transmission power,

receive, from a base station, downlink control information on a physical downlink control channel of a first link between the terminal and the base station, the downlink control information including power control information indicating a power control method of a second link between terminals as a first method or a second method and information on resources for transmitting at least one signal via the second link,

identify that a transmission power of the at least one signal via the second link is the maximum uplink transmission power, in a case that the power control information for the second link indicates the first method,

identify the transmission power of the at least one signal via the second link based on the maximum uplink transmission power, a resource for transmitting the at least one signal and information on a path loss, in a case that the power control information for the second link indicates the second method, and

transmit the at least one signal on the second link based on the identified transmission power,

wherein the resource for transmitting the at least one signal is identified based on the information on resources for transmitting the at least one signal.

8. The terminal of claim 7, wherein the controller is further configured to receive, from the base station, information on power control information via the first link.

9. The terminal of claim 8,

wherein the transmission power is further identified based on the power control information via the first link in the case that the power control information indicates the second method.

10. A base station in a mobile communication system, the base station comprising:

a transceiver configured to transmit and receive signals and

a controller coupled with the transceiver and configured to;

transmit, to a terminal, information for a maximum uplink transmission power, identify downlink control information, and

transmit, to the terminal, the downlink control information on a physical downlink control channel of a first link between the terminal and the base station, the downlink control information including power control information indicating a power control method of a second link between terminals as a first method or a second method and information on resources for transmitting at least one signal via the second link,

wherein a transmission power of the at least one signal via the second link is identified as the maximum uplink transmission power, in a case that the power control information for the second link indicates the first method,

wherein the transmission power of the at least one signal via the second link is identified based on the maximum uplink transmission power, a resource for transmitting the at least one signal and information on a path loss, in a case that the power control information for the second link indicates the second method,

wherein the at least one signal on the second link is transmitted based on the identified transmission power, and

wherein the resource for transmitting the at least one signal is identified based on the information on resources for transmitting the at least one signal.

11. The base station of claim 10, wherein the controller is further configured to transmit, to the terminal, information on power control information via the first link.