# US 2019/0356447 A1 · Terminal and communication method

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- Number: US 2019/0356447 A1
- Document ID: US20190356447A1
- Status: Published application
- Kind: A1
- Application number: 16/476,060
- Filed: 2018-01-17
- Published: 2019-11-21
- Earliest claimed: 2017-03-22
- Assignees: Panasonic Intellectual Property Corporation of America
- Applicants: Panasonic Intellectual Property Corporation of America
- Inventors: Takashi IWAI; Hidetoshi SUZUKI; Tomohumi TAKATA; Ayako HORIUCHI
- Web page: https://patentgrep.com/patent/US20190356447A1

## CPC

- H04L 5/0051: {of dedicated pilots, i.e. pilots destined for a single user or terminal}
- H04L 5/0039: {Frequency-contiguous, i.e. with no allocation of frequencies for one user or terminal between the frequencies allocated to another}
- H04W 52/22: taking into account previous information or commands
- H04W 52/228: {using past power values or information}
- H04W 52/242: {taking into account path loss}
- H04W 52/265: {taking into account the quality of service QoS}
- H04W 52/367: {Power values between minimum and maximum limits, e.g. dynamic range}
- H04W 72/51: based on terminal or device properties
- H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M)
- H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72)

## Abstract

In a terminal, an SRS drop control unit drops a portion of partial bands from among a plurality of partial bands in a case where transmission power for reference signals generated using a plurality of sequences having a sequence length that corresponds to a partial band exceeds a threshold value. Furthermore, a radio transmission unit transmits the reference signals by means of the remaining partial bands other than the portion of partial bands that are dropped from among the plurality of partial bands.

## Claims

### Claim 1

A terminal comprising:
circuitry, which, in operation, drops a portion of partial bands from among a plurality of partial bands in a case where transmission power for reference signals generated using a plurality of sequences having a sequence length that corresponds to a partial band exceeds a threshold value; and
a transmitter, which, in operation, transmits the reference signals by means of remaining partial bands other than the portion of partial bands that are dropped from among the plurality of partial bands.

### Claim 2 (depends on 1)

The terminal according to claim 1,
wherein the circuitry, in operation, drops non-contiguous partial bands from among the plurality of partial bands.

### Claim 3 (depends on 1)

The terminal according to claim 1,
wherein the circuitry, in operation, drops contiguous partial bands from among the plurality of partial bands.

### Claim 4 (depends on 1)

The terminal according to claim 1,
wherein the portion of partial bands that are dropped are associated with terminal-specific information.

### Claim 5 (depends on 1)

The terminal according to claim 1,
wherein the portion of partial bands that are dropped are associated with timings at which the terminal transmits the reference signals.

### Claim 6 (depends on 1)

The terminal according to claim 1,
wherein the transmitter, in operation, transmits the reference signals in accordance with a plurality of items of setting information indicating partial bands to which the reference signals are allocated, and
the portion of partial bands that are dropped are partial bands indicated in some setting information from among the plurality of items of setting information.

### Claim 7 (depends on 1)

The terminal according to claim 1,
wherein the portion of partial bands that are dropped are at least one partial band out of partial bands for which there have been set code sequences having sequence numbers that are the same, from among the plurality of partial bands.

### Claim 8 (depends on 1)

The terminal according to claim 1,
wherein the portion of partial bands that are dropped are at least one partial band out of partial bands having set therefor code sequences in which both sequence numbers and cyclic shift numbers are the same, from among the plurality of partial bands.

### Claim 9

A communication method comprising:
dropping a portion of partial bands from among a plurality of partial bands in a case where transmission power for reference signals generated using a plurality of sequences having a sequence length that corresponds to a partial band exceeds a threshold value; and
transmitting the reference signals by means of remaining partial bands other than the portion of partial bands that are dropped from among the plurality of partial bands.