Method and device for controlling transmission power in uplink transmission

• US 9,992,763 B2
• Filed: 07/28/2016
• Issued: 06/05/2018
• Est. Priority Date: 02/25/2009
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Lee, Moon Il, Chung, Jae Hoon, Ko, Hyun Soo, Ihm, Bin Chul, Kwon, Yeong Hyeon
• Primary Examiner(s): Ho, Chuong T
• Application Number:
  US15/222,736
• Publication Number:
  US 20160338017A1
• Time in Patent Office: 677 Days
• Field of Search: 370329, 370330, 370331, 370252, 370253, 370254, 455522
• CPC Class Codes: H04B 7/0404 the mobile station comprising multiple antennas, e.g. to provide uplink diversity
• CPC Class Codes: H04B 7/0691 using subgroups of transmit antennas
• CPC Class Codes: H04W 52/146 Uplink power control
• CPC Class Codes: H04W 52/242 taking into account path loss
• CPC Class Codes: H04W 52/325 Power control of control or pilot channels
• CPC Class Codes: H04W 52/346 distributing total power among users or channels
• CPC Class Codes: H04W 52/367 Power values between minimum and maximum limits, e.g. dynamic range
• CPC Class Codes: H04W 52/42 in systems with time, space, frequency or polarisation diversity
• CPC Class Codes: H04W 72/02 Selection of wireless resources by user or terminal
• 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

A user equipment in wireless communication system is provided. The user equipment includes an antenna unit including a plurality of antennas, a control unit for grouping the plurality of antennas into a predetermined number of antenna groups and controlling separately transmission power of each of the predetermined number of antenna groups, and a transmitting unit, connected to the control unit, for transmitting at least one of data and control information to a base station via at least one of the predetermined number of antenna groups.

Claims

1. A user equipment for supporting multiple component carriers through carrier aggregation, comprising:

a radio frequency (RF) unit, and

a processor, coupled to the RF unit, configured to;

control the RF unit to receive control information associated with respective maximum allowed powers for the multiple component carriers;

determine a maximum transmission power P_MAX,PUCCH of physical uplink control channel (PUCCH) and a maximum transmission power P_MAX,PUSCH of physical uplink shared channel (PUSCH) for a component carrier x among the multiple component carriers; and

determine a transmission power P_PUCCH of the PUCCH within the maximum transmission power P_MAX,PUCCH and a transmission power P_PUSCH of the PUSCH within the maximum transmission power P_MAX,PUSCH; and

control the RF unit to transmit the PUCCH at the transmission power P_PUCCH and the PUSCH at the transmission power P_PUSCH on the component carrier x,

wherein the maximum transmission power P_MAX,PUCCH is set to be P_MAX,x, where P_MAX,x is a maximum allowed power for the component carrier x, and

wherein the maximum transmission power P_MAX,PUCCH is set to be ‘

P_MAX,x−

P_PUCCH’

, and

wherein the multiple component carriers share a maximum transmission power P_MAX of the user equipment.

2. The user equipment of claim 1, wherein the processor is configured to control the RF unit to transmit the PUCCH and the PUSCH simultaneously.

3. The user equipment of claim 1, further comprising:

a plurality of antennas,

wherein the RF unit is further configured to receive information indicating one or more antennas to be turned on or turned off and to transmit the PUCCH and the PUSCH through one or more antennas turned on.

4. The user equipment of claim 1, wherein the component carrier x is a primary component carrier among the multiple component carriers.

5. A method for transmitting uplink signal at a user equipment supporting multiple component carriers through carrier aggregation, comprising:

receiving, by the user equipment, control information associated with respective maximum allowed powers for the multiple component carriers;

determining, by the user equipment, a maximum transmission power P_MAX,PUCCH of a physical uplink control channel (PUCCH) and a maximum transmission power P_MAX,PUSCH of a physical uplink shared channel (PUSCH) for a component carrier x among the multiple component carriers based on a maximum allowed power for the component carrier x among the respective maximum allowed powers for the multiple component carriers;

determining, by the user equipment, a transmission power P_PUCCH of the PUCCH within the maximum transmission power P_MAX,PUCCH and a transmission power P_PUSCH of the PUSCH within the maximum transmission power P_MAX,PUSCH; and

transmitting, by the user equipment, the PUCCH at the transmission power P_PUCCH and the PUSCH at the transmission power P_PUSCH on the component carrier x,

wherein the maximum transmission power P_MAX,PUCCH is set to be P_MAX,x, where P_MAX,x is the maximum allowed power for the component carrier x,

wherein the maximum transmission power P_MAX,PUSCH is set to be ‘

P_MAX,x−

P_PUCCH’

, and

wherein the multiple component carriers share a maximum transmission power P_MAX of the user equipment.

6. The method of claim 5, wherein transmitting the PUCCH and the PUSCH comprises transmitting the PUCCH and the PUSCH simultaneously.

7. The method of claim 5, wherein the user equipment includes a plurality of antennas, and the method further comprises:

receiving information indicating one or more antennas of the plurality of antennas to be turned on or turned off; and

transmitting the PUCCH and the PUSCH through one or more antennas turned on.

8. The method of claim 5, wherein the component carrier x is a primary component carrier among the multiple component carriers.