| 摘要 |
A communications device comprises a transmitter configured to transmit signals to one or more other communications devices via a wireless access interface, the one or more communications devices being arranged to perform device-to-device communications. A receiver is configured to receive signals from the one of the other communications devices via the wireless access interface, and a controller for controlling the transmitter and the receiver to transmit or to receive the signals via the wireless access interface to transmit or to receive data represented by the signals. The wireless access interface provides a scheduling region comprising a plurality of predetermined sections of communications resources, and a plurality of sections of shared communications resources. Each of the plurality of predetermined sections of the scheduling region correspond to one of the plurality of sections of the shared communications resources, so that transmitting in one of the plurality of the sections of the scheduling region reserves the corresponding section of the shared communications resources for transmitting the signals representing the data. The transmission of the scheduling assignment message in a section of the scheduling region informs the other devices of the group that a communications device will transmit signals representing data in a corresponding section of the shared communications channel. Other devices in the group which are not transmitting therefore monitor the scheduling region and if they detect a scheduling assignment message transmitted in one or more sections of the schedule assignment region then the devices attempt to detect and decode signals transmitted in a corresponding section of the shared communications resources channel. Accordingly a group of communications device can perform device-to-device (D2D) communications without the requirement for a central coordinating entity which can therefore improve efficiency with which communications resources are used. |
