Method and apparatus for power control and multilplexing for device to device communication in wireless cellular communication system

• US 9,794,890 B2
• Filed: 10/24/2016
• Issued: 10/17/2017
• Est. Priority Date: 02/15/2013
• Status: Active Grant

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: Kwak, Yongjun, Cho, Joonyoung, Ji, Hyoungju, Ro, Sangmin
• Primary Examiner(s): Pham, Brenda H
• Application Number:
  US15/332,628
• Publication Number:
  US 20170041884A1
• Time in Patent Office: 358 Days
• Field of Search: 370230, 370231, 370232, 370235, 370233, 370234, 370252
• 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 52/367 Power values between minimum and maximum limits, e.g. dynamic range
• CPC Class Codes: H04W 52/383 power control in peer-to-peer links
• CPC Class Codes: H04W 72/0473 the resource being transmission power
• CPC Class Codes: H04W 72/21 in the uplink direction of a wireless link, i.e. towards the network

Abstract

Methods and apparatuses for controlling power in a communication system are provided. A first user equipment (UE) receives power control related information from a base station. Data is transmitted to a second UE based on a transmission power, if there is no uplink transmission. The transmission power is based on a first transmission power determined by a number of assigned resource blocks, a path loss, and the received power control related information.

Claims

1. A method of controlling power in a communication system, the method comprising:

receiving, by a first user equipment (UE), power control related information from a base station; and

transmitting data, from the first UE, to a second UE based on a transmission power, if there is no uplink transmission from the first UE,

wherein the transmission power is based on a first transmission power determined by a number of assigned resource blocks, a path loss, and the received power control related information.

2. The method of claim 1, wherein the transmission power is further based on a second transmission power being a maximum available transmission power for the data.

3. The method of claim 2, wherein the transmission power is a smaller one among the first transmission power and the second transmission power.

4. The method of claim 1, wherein the data comprises at least one of a discovery signal, control information, and data information.

5. The method of claim 1, wherein the data is transmitted on a subframe configured for transmission of the data.

6. The method of claim 1, wherein the path loss is calculated for a serving cell based on information provided by signalling from the base station.

7. A first user equipment (UE) in a communication system, comprising:

a transceiver configured to transmit and receive signals; and

a controller configured to control the transceiver to;

receive power control related information from a base station; and

transmit data to a second UE based on a transmission power, if there is no uplink transmission from the first UE,

wherein the transmission power is based on a first transmission power determined by a number of assigned resource blocks, a path loss, and the received power control related information.

8. The first UE of claim 7, wherein the transmission power is further based on a second transmission power being a maximum available transmission power for the data.

9. The first UE of claim 8, wherein the transmission power is a smaller one among the first transmission power and the second transmission power.

10. The first UE of claim 7, wherein the data comprises at least one of a discovery signal, control information, and data information.

11. The first UE of claim 7, wherein the data is transmitted on a subframe configured for transmission of the data.

12. The first UE of claim 7, wherein the path loss is calculated for a serving cell based on information provided by signalling from the base station.