# US 10,375,678 B2 · Communication system, base station apparatus, mobile station apparatus, and communication method

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- Number: US 10,375,678 B2
- Document ID: US10375678B2
- Status: Granted
- Kind: B2
- Application number: 15/811,316
- Filed: 2017-11-13
- Published: 2018-03-08
- Granted: 2019-08-06
- Earliest claimed: 2011-07-04
- Assignees: Sharp Kabushiki Kaisha
- Applicants: Sharp Kabushiki Kaisha
- Inventors: Wataru Ouchi; Shoichi Suzuki; Tatsushi Aiba; Daiichiro Nakashima
- Web page: https://patentgrep.com/patent/US10375678B2

## CPC

- H04W 72/20: Control channels or signalling for resource management
- H04J 11/0053: {using co-ordinated multipoint transmission/reception (co-ordinated antenna or beam-forming aspects H04B7/022)}
- H04L 5/0012: {Hopping in multicarrier systems}
- H04L 5/0051: {of dedicated pilots, i.e. pilots destined for a single user or terminal}
- H04L 5/0053: {Allocation of signalling, i.e. of overhead other than pilot signals}
- H04L 5/0073: {Allocation arrangements that take into account other cell interferences}
- H04L 27/14: Demodulator circuits; Receiver circuits
- H04W 72/00: Local resource management
- H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72)
- H04J: MULTIPLEX COMMUNICATION (transmission in general H04B; peculiar to transmission of digital information H04L5/00; systems for the simultaneous or sequential transmission of more than one television signal H04N7/08; in exchanges H04Q11/00; stereophonic systems H04S)
- H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M)

## Abstract

A communication system comprises at least a base station device and a terminal device. The terminal device transmits a demodulation reference signal associated with a physical channel, receives a configuration of comb of the demodulation reference signal, and transmits the demodulation reference signal mapped based on the configuration of comb. The base station device transmits a configuration of comb of a demodulation reference signal related to a physical channel.

## Claims

### Claim 1

A mobile station apparatus comprising:
a pseudo-random sequence generator configured to be initialized, at a beginning of each radio frame, with a first value using a first parameter; wherein
in a first case that a second parameter is set, the pseudo-random sequence generator is configured to be initialized with the first value using the second parameter, for hopping of a first base sequence for a physical uplink control channel (PUCCH),
the second parameter is different from the first parameter;
in a second case that a third parameter is set, the pseudo-random sequence generator is configured to be initialized with the first value using the third parameter, for hopping of a second base sequence for a demodulation reference signal for a physical uplink shared channel (PUSCH), and
the third parameter is different from the first parameter and the second parameter.

### Claim 2

A method for a mobile station apparatus, comprising:
initializing a pseudo-random sequence generator at a beginning of each radio frame, with a first value using a first parameter;
in a first case that a second parameter is set, initializing the pseudo-random sequence generator with the first value using the second parameter, for hopping of a first base sequence for a physical uplink control channel (PUCCH), wherein
the second parameter is different from the first parameter; and
in a second case that a third parameter is set, initializing the pseudo-random sequence generator with the first value using the third parameter, for hopping of a second base sequence for a demodulation reference signal for a physical uplink shared channel (PUSCH), wherein
the third parameter is different from the first parameter and the second parameter.