# US 10,873,913 B2 · Wireless communication device and method for controlling transmission power

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- Number: US 10,873,913 B2
- Document ID: US10873913B2
- Status: Granted
- Kind: B2
- Application number: 16/667,374
- Filed: 2019-10-29
- Published: 2020-02-27
- Granted: 2020-12-22
- Earliest claimed: 2010-04-30
- Assignees: Sun Patent Trust
- Applicants: Sun Patent Trust
- Inventors: Takashi Iwai; Daichi Imamura; Akihiko Nishio; Yoshihiko Ogawa; Shinsuke Takaoka
- Web page: https://patentgrep.com/patent/US10873913B2

## CPC

- H04W 52/241: {taking into account channel quality metrics, e.g. SIR, SNR, CIR or Eb/lo}
- H04L 5/0048: {Allocation of pilot signals, i.e. of signals known to the receiver (allocation of control signalling H04L5/0053; use of control signalling H04L5/0091)}
- H04L 5/0051: {of dedicated pilots, i.e. pilots destined for a single user or terminal}
- H04W 52/146: {Uplink power control}
- H04W 52/16: Deriving transmission power values from another channel
- H04W 52/325: {Power control of control or pilot channels}
- H04W 72/0473: {the resource being transmission power}
- Y02D 30/70: in wireless communication networks
- H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72)
- H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M)
- Y02D: CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE

## Abstract

Disclosed is a wireless communication device that can suppress an increase in power consumption of a terminal while preventing the degradation of SINR measurement precision resulting from TPC errors in a base station. A terminal controls the transmission power of a second signal by adding an offset to the transmission power of a first signal; an offset-setting unit sets an offset correction value in response to a transmission time gap between a third signal transmitted the previous time and the second signal transmitted this time; and a transmission power control unit controls the transmission power of the second signal using the correction value.

## Claims

### Claim 1

An integrated circuit comprising:
circuitry, which, in operation, controls
generating a first Sounding Reference Signal (SRS) which is to be transmitted periodically and a second SRS which is to be transmitted with a time interval between triggering and transmission that is different from a transmission time interval of the first SRS, both of the first SRS and the second SRS being reference signals for channel-quality estimation; and
transmitting the first SRS with a transmission power controlled based on a first power parameter indicated by a base station and transmitting the second SRS with a transmission power controlled based on a second power parameter indicated by the base station, the second power parameter being different from the first power parameter.

### Claim 2 (depends on 1)

The integrated circuit according to claim 1, wherein a greater power is set for a longer transmission time interval.

### Claim 3 (depends on 1)

The integrated circuit according to claim 1, wherein the first SRS is a periodic SRS, and the second SRS is an aperiodic SRS which is transmitted aperiodically.

### Claim 4 (depends on 3)

The integrated circuit according to claim 3, wherein the second power parameter is set to be greater than the first power parameter.