Invention Grant
US09014031B2 Wireless communication system, apparatus and method using a power headroom value for each uplink component carrier of a plurality of uplink component carriers
有权
对多个上行链路分量载波的每个上行链路分量载波使用功率余量值的无线通信系统，装置和方法
- Patent Title: Wireless communication system, apparatus and method using a power headroom value for each uplink component carrier of a plurality of uplink component carriers
- Patent Title (中): 对多个上行链路分量载波的每个上行链路分量载波使用功率余量值的无线通信系统，装置和方法
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Application No.: US13458177Application Date: 2012-04-27
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Publication No.: US09014031B2Publication Date: 2015-04-21
- Inventor: Shoichi Suzuki , Shohei Yamada
- Applicant: Shoichi Suzuki , Shohei Yamada
- Applicant Address: JP Osaka
- Assignee: Sharp Kabushiki Kaisha
- Current Assignee: Sharp Kabushiki Kaisha
- Current Assignee Address: JP Osaka
- Agency: Birch, Stewart, Kolasch & Birch, LLP
- Priority: JP2009-247497 20091028
- Main IPC: H04L12/26
- IPC: H04L12/26 ; H04W52/36 ; H04W52/32 ; H04W52/34
Abstract:
Efficient transmission control of power headroom is performed by a mobile station apparatus that includes a power headroom control unit which manages a power headroom which is a difference between a maximum transmit power value determined for each uplink carrier component by a base station and a predetermined power value estimated for uplink transmission. A path loss measurement unit monitors a path loss of a downlink carrier component informed from the base station among a plurality of downlink carrier components. When a path loss value of any downlink carrier component changes more than a predetermined value, the power headroom control unit modifies transmission to the base station apparatus of the power headroom for uplink transmission corresponding to all the downlink carrier components set by the base station apparatus.
Public/Granted literature
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