# US 10,312,989 B2 · Antenna port mode and transmission mode transition

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- Number: US 10,312,989 B2
- Document ID: US10312989B2
- Status: Granted
- Kind: B2
- Application number: 15/871,674
- Filed: 2018-01-15
- Published: 2018-05-17
- Granted: 2019-06-04
- Earliest claimed: 2009-10-02
- Assignees: Sharp Kabushiki Kaisha
- Applicants: Sharp Kabushiki Kaisha
- Inventors: Kimihiko Imamura; John Michael Kowalski; Sayantan Choudhury
- Web page: https://patentgrep.com/patent/US10312989B2

## CPC

- H04B 7/0689: {using different transmission schemes, at least one of them being a diversity transmission scheme}
- H04B 1/04: Circuits
- H04B 7/0871: {using different reception schemes, at least one of them being a diversity reception scheme}
- H04W 52/146: {Uplink power control}
- H04W 52/228: {using past power values or information}
- H04W 52/42: in systems with time, space, frequency or polarisation diversity
- H04W 72/21: in the uplink direction of a wireless link, i.e. towards the network
- H04W 52/34: TPC management, i.e. sharing limited amount of power among users or channels or data types, e.g. cell loading
- H04W 88/06: adapted for operation in multiple networks {or having at least two operational modes}, e.g. multi-mode terminals
- H04B: TRANSMISSION
- H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72)

## 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

### Claim 1

A wireless communication device communicating with a base station using a plurality of component carriers, comprising:
processing circuitry configured to determine physical uplink shared channel (PUSCH) transmission power for each component carrier and 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 maximum transmission power of the wireless communication device,
the PUSCH transmission power for each component carrier is determined by scaling projected PUSCH transmission power for each component carrier based on predefined priority of physical channels,
wherein the sum of projected values is a sum of projected transmission power for the first PUCCH, projected transmission power for the second PUCCH, and projected transmission power for the one or more PUSCHs,
wherein the maximum transmission power of the wireless communication device is defined based on a user equipment (UE) power class of the wireless communication device.

### Claim 2

A power control method for a plurality of component carriers of a wireless communication device communicating with a base station, comprising:
determining physical uplink shared channel (PUSCH) transmission power for each component carrier and 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 based on predefined priority of physical channels,
wherein the sum of projected values is a sum of projected transmission power for the first PUCCH, projected transmission power for the second PUCCH, and projected transmission power for the one or more PUSCHs,
wherein the maximum transmission power of the wireless communication device is defined based on a user equipment (UE) power class of the wireless communication device.

### Claim 3

A base station performing an uplink power control procedure for a plurality of component carriers for a wireless communication device, comprising:
processing circuitry configured to determine, for the wireless communication device, physical uplink shared channel (PUSCH) transmission power for each component carrier and 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 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 projected PUSCH transmission power for each component carrier based on predefined priority of physical channels,
wherein the sum of projected values is a sum of projected transmission power for the first PUCCH, projected transmission power for the second PUCCH, and projected transmission power for the one or more PUSCHs,
wherein the maximum transmission power of the wireless communication device is defined based on a user equipment (UE) power class of the wireless communication device.

### Claim 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, comprising:
determining, for the wireless communication device, physical uplink shared channel (PUSCH) transmission power for each component carrier and 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 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 projected PUSCH transmission power for each component carrier based on predefined priority of physical channels,
wherein the sum of projected values is a sum of projected transmission power for the first PUCCH, projected transmission power for the second PUCCH, and projected transmission power for the one or more PUSCHs,
wherein the maximum transmission power of the wireless communication device is defined based on a user equipment (UE) power class of the wireless communication device.