Communication system, base station apparatus, mobile station apparatus, and communication method

• US 10,375,678 B2
• Filed: 11/13/2017
• Issued: 08/06/2019
• Est. Priority Date: 07/04/2011
• Status: Active Grant

• Current Assignee: Guangdong OPPO Mobile Telecommunications Corporation Limited
• Original Assignee: Sharp Kabushiki Kaisha (Hon Hai Precision Industry Co., Ltd.)
• Inventors: Ouchi, Wataru, Suzuki, Shoichi, Aiba, Tatsushi, Nakashima, Daiichiro
• Primary Examiner(s): Wong, Warner
• Application Number:
  US15/811,316
• Publication Number:
  US 20180070348A1
• Time in Patent Office: 631 Days
• CPC Class Codes: H04J 11/0053 using co-ordinated multipoint transmission/reception co-ordinated antenna or beam-forming aspects H04B7/022
• CPC Class Codes: H04L 27/14 Demodulator circuits; Receiver circuits
• CPC Class Codes: H04L 5/0012 Hopping in multicarrier systems for frequency hopping in spread spectrum systems H04B1/713
• CPC Class Codes: H04L 5/0051 of dedicated pilots, i.e. pilots destined for a single user or terminal
• CPC Class Codes: H04L 5/0053 Allocation of signaling, i.e. of overhead other than pilot signals
• CPC Class Codes: H04L 5/0073 Allocation arrangements that take into account other cell interferences for intercell interference mitigation or co-ordination in orthogonal multiplex systems H04J11/005
• CPC Class Codes: H04W 72/00 Local resource management
• CPC Class Codes: H04W 72/20 Control channels or signalling for resource management

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

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.

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.