- Patent Title: Wireless communication terminal device, wireless communication method and integrated circuit for controlling transmission power of sounding reference signal (SRS)
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Application No.: US15590899Application Date: 2017-05-09
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Publication No.: US09936460B2Publication Date: 2018-04-03
- Inventor: Kazuki Takeda , Akihiko Nishio
- Applicant: Sun Patent Trust
- Applicant Address: US NY New York
- Assignee: Sun Patent Trust
- Current Assignee: Sun Patent Trust
- Current Assignee Address: US NY New York
- Agency: Seed Intellectual Property Law Group LLP
- Priority: JP2012-171086 20120801
- Main IPC: G01R31/08
- IPC: G01R31/08 ; G06F11/00 ; H04J3/14 ; H04L1/00 ; H04W52/14 ; H04L5/00 ; H04B7/024 ; H04W72/04
Abstract:
A radio terminal is provided that can provide a flexible transmission power control for an SRS without restrictions due to the transmission power control of a PUSCH, for the purpose of enabling use of an SRS for various purposes in a HetNet CoMP environment. The radio terminal receives a control signal including a transmission power control command (TPC command) to be applied to an aperiodic sounding reference signal (A-SRS), through a physical downlink control channel (PDCCH), updates a transmission power value of the A-SRS using the TPC command, and transmits the A-SRS using the updated transmission power value in accordance with a transmission request included in a control signal indicating assignment of a physical downlink data channel (PDSCH) or assignment of a physical uplink data channel (PUSCH).
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