Terminal device, base station device, transmission method and reception method

Patent metadata

Field	Value
Publication number	US-9276717-B2
Application number	US-201214352612-A
Country	US
Kind code	B2
Filing date	Oct 24, 2012
Priority date	Nov 7, 2011
Publication date	Mar 1, 2016
Grant date	Mar 1, 2016

Abstract

The present disclosure enables dynamic switching to a frame format different from the UL-DL configuration set by an SIB, and in particular switching to a downlink communication subframe from an uplink communication subframe, while also enabling effective utilization of downlink communication subframes. A base station uses “UL/DL communication subframe switching information” included in a DCI sent by a downlink communication subframe to instruct a terminal whether or not to perform uplink communication to a DCI using one or more uplink-specific communication subframes, and also gives instructions whether to perform uplink communication or downlink communication on an uplink communication subframe switchable to a downlink communication subframe.

First claim

The invention claimed is:

1. A base station apparatus comprising:
a control section that generates UL/DL communication subframe switching information indicating whether to perform uplink communication corresponding to assignment control information in one or more communication subframes fixed to an uplink and indicating whether to perform uplink communication or downlink communication in an uplink communication subframe switchable to a downlink communication subframe; and
a transmitting section that transmits the generated UL/DL communication subframe switching information to a terminal apparatus,
wherein an uplink communication subframe for transmitting an error detection result for downlink data or for transmitting uplink data corresponding to downlink control information, the downlink data and the downlink control information being received by the terminal apparatus, is a communication subframe that is located at or after a fourth subframe position from a downlink communication subframe in which the downlink data or the downlink control information is transmitted, and that is fixed to an uplink and positioned at earliest timing.

2. The base station apparatus according to claim 1 , wherein:
the uplink communication subframe switchable to a downlink communication subframe is indicated by a combination of a UL-DL configuration indicated by a system information block (SIB), and a switchable subframe indication format which is another UL-DL configuration; and
in the switchable subframe indication format, timing of the uplink communication subframe switchable to a downlink communication subframe is a subset of timing of an uplink communication subframe defined by the UL-DL configuration indicated by SIB.

3. The base station apparatus according to claim 1 , wherein an uplink communication subframe for transmitting an error detection result for downlink data or for transmitting uplink data corresponding to downlink control information, the downlink data and the downlink control information being received by the terminal apparatus, is an uplink communication subframe that is located at or after a fourth subframe position from the downlink communication subframe in which the downlink data or the downlink control information is transmitted and that is located at or after a first subframe position from a special subframe at earliest timing.

4. A terminal apparatus comprising:
a receiving section that receives UL/DL communication subframe switching information indicating whether to perform uplink communication corresponding to assignment control information in one or more communication subframes fixed to an uplink and indicating whether to perform uplink communication or downlink communication in an uplink communication subframe switchable to a downlink communication subframe;
a mapping section that performs mapping according to the indication of the received UL/DL communication subframe switching information; and
a transmitting section that transmits a mapped signal to a base station apparatus,
wherein an uplink communication subframe for transmitting an error detection result for downlink data or for transmitting uplink data corresponding to downlink control information, the downlink data and the downlink control information being received by the terminal apparatus, is a communication subframe that is located at or after a fourth subframe position from a downlink communication subframe in which the downlink data or the downlink control information is transmitted, and that is fixed to an uplink and positioned at earliest timing.

5. The terminal apparatus according to claim 4 , wherein, when the UL/DL communication subframe switching information is not received and when there is an uplink communication transmission period or transmission data in the uplink communication subframe switchable to a downlink communication subframe, transmission is performed in the uplink communication subframe switchable to a downlink communication subframe, and when there is no uplink communication transmission period or transmission data, reception is performed in the uplink communication subframe switchable to a downlink communication subframe.

6. A transmission method comprising:
controlling a base station apparatus to generate UL/DL communication subframe switching information indicating whether to perform uplink communication corresponding to assignment control information in one or more communication subframes fixed to an uplink and indicating whether to perform uplink communication or downlink communication in an uplink communication subframe switchable to a downlink communication subframe; and
transmitting the generated UL/DL communication subframe switching information from the base station apparatus to a terminal apparatus,
wherein an uplink communication subframe for transmitting an error detection result for downlink data or for transmitting uplink data corresponding to downlink control information, the downlink data and the downlink control information being received by the terminal apparatus, is a communication subframe that is located at or after a fourth subframe position from a downlink communication subframe in which the downlink data or the downlink control information is transmitted, and that is fixed to an uplink and positioned at earliest timing.

7. A reception method comprising:
receiving from a base station apparatus by a terminal apparatus, UL/DL communication subframe switching information indicating whether to perform uplink communication corresponding to assignment control information in one or more communication subframes fixed to an uplink and indicating whether to perform uplink communication or downlink communication in an uplink communication subframe switchable to a downlink communication subframe;
performing mapping of a transmission signal according to the indication of the received UL/DL communication subframe switching information; and
transmitting the mapped transmission signal from the terminal apparatus to the base station apparatus,
wherein an uplink communication subframe for transmitting an error detection result for downlink data or for transmitting uplink data corresponding to downlink control information, the downlink data and the downlink control information being received by the terminal apparatus, is a communication subframe that is located at or after a fourth subframe position from a downlink communication subframe in which the downlink data or the downlink control information is transmitted, and that is fixed to an uplink and positioned at earliest timing.

Assignees

• Panasonic Ip Corp America

Inventors

• Oizumi Toru
• Imamura Daichi

Classifications

• H04L5/0037 Primary

  Inter-user or inter-terminal allocation · CPC title

• H04L5/0096 Primary

  Indication of changes in allocation · CPC title

• H04L5/001

  the frequencies being arranged in component carriers · CPC title

• H04L5/14

  Two-way operation using the same type of signal, i.e. duplex · CPC title

• H04L5/0053

  Allocation of signalling, i.e. of overhead other than pilot signals · CPC title