Channel configuration in device-to-device communications
The present invention provides for a method of configuring a physical channel, such as a physical control channel, for device-to-device communication between mobile terminal devices within a cellular communications network environment and comprising a step of locating a device-to-device control channel within a cellular uplink signalling spectrum, and applying a frequency offset parameter to determine separation of the device-to-device control channel from a cellular uplink control channel, and to related terminal devices and computer program products.
1. A method performed by a base station configured to communicate with a first user equipment (UE) that is configured to communicate, in an uplink with the base station, using a physical uplink control channel (PUCCH) and a physical uplink shared channel (PUSCH) and to communicate, in direct link with a second UE, using a device-to-device control channel and a device-to-device shared channel, the method comprising:
transmitting downlink control information for configuring the first UE with at least one device-to-device control channel resource;
wherein, the first UE determines resource blocks for device-to-device shared channel transmission based on a resource used for the device-to-device control channel transmission and the downlink control information, and wherein the resources are configured such that the first UE transmits the device-to-device control channel in resource blocks adjacent, in a sub-frame, to resource blocks used for the corresponding device-to-device shared channel.
2. A base station configured to communicate with a first user equipment (UE) that is configured to communicate, in an uplink with the base station, using a physical uplink control channel (PUCCH) and a physical uplink shared channel (PUSCH) and to communicate, in direct link with a second UE, using a device-to-device control channel and a device-to-device shared channel, the base station comprising:
a processor and a transceiver circuit, wherein the controller is configured to control the transceiver circuit to transmit downlink control information for configuring the first UE with at least one device-to-device control channel resource;
wherein, the first UE determines resource blocks for device-to-device shared channel transmission based on a resource used for the device-to-device control channel transmission and the downlink control information, and wherein the resources are configured such that the first UE transmits the device-to-device control channel in resource blocks adjacent, in a sub-frame, to resource blocks used for the corresponding device-to-device shared channel.
3. A method performed by a user equipment (UE) that is configured to communicate, in an uplink with a base station, using a physical uplink control channel (PUCCH) and a physical uplink shared channel (PUSCH) and to communicate, in direct link with another UE, using a device-to-device control channel and a device-to-device shared channel, the method comprising:
receiving, from the base station, downlink control information for configuring at least one device-to-device control channel resource;
determining resource blocks for device-to-device shared channel transmission based on a resource used for the device-to-device control channel transmission and the downlink control information; and
transmitting the device-to-device control channel in resource blocks adjacent, in a sub-frame, to resource blocks used for the corresponding device-to-device shared channel.
4. A user equipment (UE) that is configured to communicate, in an uplink with a base station, using a physical uplink control channel (PUCCH) and a physical uplink shared channel (PUSCH) and to communicate, in direct link with another UE, using a device-to-device control channel and a device-to-device shared channel, the UE comprising:
a controller and a transceiver, wherein the controller is configured:
to control the transceiver circuit to receive downlink control information for configuring at least one device-to-device control channel resource;
to determine resource blocks for device-to-device shared channel transmission based on a resource used for the device-to-device control channel transmission and the downlink control information; and
to control the transceiver to transmit the device-to-device control channel in resource blocks adjacent, in a sub-frame, to resource blocks used for the corresponding device-to-device shared channel.