IP Library › Granted Patent US 9,917,630
Granted Patent B2
US 9,917,630 · App. 14/697,356 · Granted Mar 13, 2018

Antenna port mode and transmission mode transitions

Inventors: Kimihiko Imamura (Osaka, JP); John Michael Kowalski (Camas, WA); Sayantan Choudhury (Vancouver, WA)
Assignee: Sharp Kabushiki Kaisha
H04B7/0689H04B1/04H04B7/0871H04W52/146H04W52/228H04W52/42H04W72/0413H04W52/34H04W88/06
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Quick Facts
Patent No.
US 9,917,630
App. No.
14/697,356
Granted
Mar 13, 2018
Kind
B2
Abstract

A wireless communication device may autonomously transition from a multiple antenna port mode to a single antenna port mode. The wireless communication device may implicitly notify a base station about the autonomous transition from the multiple antenna port mode to the single antenna port mode. The base station may reallocate resources that were previously allocated to the wireless communication device but that are no longer being used by the wireless communication device. In some cases, the base station may configure the wireless communication device's antenna port mode via radio resource control signaling.

Claims (33)

1. A wireless communication device communicating with a base station using a plurality of component carriers, comprising:

one or more antennas; and

an uplink power control unit configured to determine a physical uplink shared channel (PUSCH) transmission power for each component carrier and a physical uplink control channel (PUCCH) transmission power for each component carrier, wherein

in a case that a first PUCCH on a first component carrier, a second PUCCH on a second component carrier, and one or more PUSCHs are transmitted in a same subframe, and

at least in a case that a sum of projected values exceeds a maximum transmission power of the wireless communication device,

the PUSCH transmission power for each component carrier is determined by scaling a projected PUSCH transmission power for each component carrier,

wherein the sum of projected values is a sum of a projected transmission power for the first PUCCH, a projected transmission power for the second PUCCH, and a projected transmission power for the one or more PUSCHs,

wherein the PUSCH transmission power for each component carrier is defined by a function based on at least a number of physical resource blocks (PRBs) in the component carrier, and

wherein the number of PRBs is a number of assigned PRBs for the PUSCH in the component carrier for the wireless communication device.

2. A power control method for a plurality of component carriers of a wireless communication device with one or more antennas communicating with a base station, comprising:

determining a physical uplink shared channel (PUSCH) transmission power for each component carrier and a physical uplink control channel (PUCCH) transmission power for each component carrier, wherein

in a case that a first PUCCH on a first component carrier, a second PUCCH on a second component carrier, and one or more PUSCHs are transmitted in a same subframe, and

at least in a case that a sum of projected values exceeds a maximum transmission power of the wireless communication device,

the PUSCH transmission power for each component carrier is determined by scaling a projected PUSCH transmission power for each component carrier,

wherein the sum of projected values is a sum of a projected transmission power for the first PUCCH, a projected transmission power for the second PUCCH, and a projected transmission power for the one or more PUSCHs,

wherein the PUSCH transmission power for each component carrier is defined by a function based on at least a number of physical resource blocks (PRBs) in the component carrier, and

wherein the number of PRBs is a number of assigned PRBs for the PUSCH in the component carrier for the wireless communication device.

3. A base station performing an uplink power control procedure for a plurality of component carriers for a wireless communication device with one or more antennas, comprising:

a power control unit configured to determine, for the wireless communication device, a physical uplink shared channel (PUSCH) transmission power for each component carrier and a physical uplink control channel (PUCCH) transmission power for each component carrier, wherein

in a case that a first PUCCH on a first component carrier, a second PUCCH on a second component carrier, and one or more PUSCHs are transmitted in a same subframe, and

at least in a case that a sum of projected values exceeds a maximum transmission power of the wireless communication device,

for the wireless communication device, the PUSCH transmission power for each component carrier is determined by scaling a projected PUSCH transmission power for each component carrier,

wherein the sum of projected values is a sum of a projected transmission power for the first PUCCH, a projected transmission power for the second PUCCH, and a projected transmission power for the one or more PUSCHs,

wherein the PUSCH transmission power for each component carrier is defined by a function based on at least a number of physical resource blocks (PRBs) in the component carrier, and

wherein the number of PRBs is a number of assigned PRBs for the PUSCH in the component carrier for the wireless communication device.

4. A power control method of a base station performing an uplink power control procedure for a plurality of component carriers for a wireless communication device with one or more antennas, comprising:

determining, for the wireless communication device, a physical uplink shared channel (PUSCH) transmission power for each component carrier and a physical uplink control channel (PUCCH) transmission power for each component carrier, wherein

in a case that a first PUCCH on a first component carrier, a second PUCCH on a second component carrier, and one or more PUSCHs are transmitted in a same subframe, and

at least in a case that a sum of projected values exceeds a maximum transmission power of the wireless communication device,

for the wireless communication device, the PUSCH transmission power for each component carrier is determined by scaling a projected PUSCH transmission power for each component carrier,

wherein the sum of projected values is a sum of a projected transmission power for the first PUCCH, a projected transmission power for the second PUCCH, and a projected transmission power for the one or more PUSCHs,

wherein the PUSCH transmission power for each component carrier is defined by a function based on at least a number of physical resource blocks (PRBs) in the component carrier, and

wherein the number of PRBs is a number of assigned PRBs for the PUSCH in the component carrier for the wireless communication device.

Assignments (2)
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Sep 4, 2015
From: SHARP LABORATORIES OF AMERICA, INC.
To: SHARP KABUSHIKI KAISHA
Reel/Frame 036498/0410 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Sep 3, 2015
From: IMAMURA, KIMIHIKO; KOWALSKI, JOHN MICHAEL; CHOUDHURY, SAYANTAN
To: SHARP LABORATORIES OF AMERICA, INC.
Reel/Frame 036490/0263 →
Continuity (2)
Continuation 12572563 · Oct 2, 2009
Related Publication 20150244446A1 · Aug 27, 2015