Demodulation reference signal mapping according to comb configuration

• US 9,848,410 B2
• Filed: 01/12/2016
• Issued: 12/19/2017
• 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:
  US14/993,668
• Publication Number:
  US 20160128052A1
• Time in Patent Office: 707 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 terminal device comprising:

a transmitter configured to transmit a demodulation reference signal associated with a physical channel; and

a receiver configured to receive a configuration of comb of the demodulation reference signal;

wherein the demodulation reference signal is mapped based on the configuration of comb,

the demodulation reference signal is defined based on an orthogonal sequence and a cyclic shift,

a pattern of the orthogonal sequence and the cyclic shift is expanded in a case that the terminal device is configured with the comb of the demodulation reference signal,

the receiver is configured to receive a downlink control information format, and

a pattern of the comb, the cyclic shift, and the orthogonal sequence for each antenna port are determined based on a cyclic shift field in the downlink control information format in the case that the terminal device is configured with the comb of the demodulation reference signal.

2. A base station device comprising:

a transmitter configured to transmit a configuration of comb of a demodulation reference signal related to a physical channel and a configuration of an orthogonal sequence,

wherein the configuration of an orthogonal sequence is expanded based on the configuration of the comb and a cyclic shift,

the transmitter is configured to transmit a downlink control information format, and

a pattern of the comb, the cyclic shift, and the orthogonal sequence for each antenna port are determined based on a cyclic shift field in the downlink control information format.

3. A transmitting method in a terminal device comprising:

transmitting a demodulation reference signal associated with a physical channel; and

receiving a configuration of comb of the demodulation reference signal; and

receiving a downlink control information format,

wherein the demodulation reference signal is mapped based on the configuration of comb,

the demodulation reference signal is defined based on an orthogonal sequence and a cyclic shift,

a pattern of the orthogonal sequence and the cyclic shift is expanded in a case that the terminal device is configured with the comb of the demodulation reference signal, and

a pattern of the comb, the cyclic shift, and the orthogonal sequence for each antenna port are determined based on a cyclic shift field in the downlink control information format in the case that the terminal device is configured with the comb of the demodulation reference signal.