TERMINAL DEVICE, BASE STATION, COMMUNICATION SYSTEM, AND COMMUNICATION METHOD

摘要

The present invention provides a base station, a terminal device, a communication system, and a communication method configured to efficiently specify a physical uplink control channel resource in a case that the base station notifies the terminal device of control information through an enhanced physical downlink control channel or in a case that a cell radius is small. The terminal device in communication with the base station monitors a physical downlink control channel placed in a common search space and an enhanced physical downlink control channel placed in a terminal-specific search space. Upon detecting the enhanced physical downlink control channel, the terminal device maps response information to a physical uplink control channel resource determined in response to at least an index of an element forming the detected enhanced physical downlink control channel and an individual shift amount individually configured on a per terminal device basis, and then reports the base station of the mapped response information.

主权项

1. A terminal device in communication with a base station, comprising:
a downlink control channel detecting unit configured to monitor a physical downlink control channel placed in a common search space and an enhanced physical downlink control channel placed in a terminal-specific search space, a data extracting unit configured to extract transmission data from a physical downlink shared channel related to the detected physical downlink control channel or the detected enhanced physical downlink control channel, a response information generating unit configured to generate response information responsive to the extracted transmission data, an uplink control channel generating unit, in a case that the downlink control channel detecting unit has detected the enhanced physical downlink control channel, configured to generate a physical uplink control channel by mapping the response information to a physical uplink control channel resource determined in response to at least an index of an element forming the detected enhanced physical downlink control channel and an individual shift amount individually configured on a per terminal device basis, and a response transmitting unit configured to transmit a signal including the physical uplink control channel.