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 with the base station via a physical uplink shared channel (PUCCH) and to communicate directly with a second UE using a device-to-device control channel and a device-to-device shared channel, the method comprising:
transmitting, to the first UE, device-to-device control channel configuration information for identifying a pool of resource blocks to be used for the device-to-device control channel signalling between the two UEs;
wherein, the device-to-device control channel configuration information comprises:
first information identifying a quantity of resource blocks; and
second information identifying a start physical resource block of the device-to-device control channel;
whereby, based on both the first information and the second information the first UE determines a resource to be used for device-to-device control channel communication between the first UE and the second UE; and
whereby, based on the resource to be used for the device-to-device control channel, the first UE performs device-to-device shared channel transmission in resource blocks adjacent, in a sub-frame, to the resource blocks used for the device-to-device control channel.
2. The method according to the claim 1 , further comprising determining, by the first UE, a location of the device-to-device control channel based on the first information and the second information.
3. The method according to the claim 1 , wherein the second information is an offset from an uplink control channel.
4. A base station configured to communicate with a first user equipment (UE) that is configured to communicate with the base station via a physical uplink shared channel (PUCCH) and to communicate directly 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, to the first UE, device-to device control channel configuration information for identifying a pool of resource blocks to be used for the device-to-device control channel signalling between the two UEs; wherein the device-to device control channel configuration information comprises:
first information identifying a quantity of resource blocks; and
second information identifying a start physical resource block of the device-to device control channel;
whereby, based on both the first information and the second information the first UE determines a resource to be used for device-to device control channel communication between the first UE and the second UE; and
whereby, based on the resource to be used for the device-to device control channel, the first UE performs device-to device shared channel transmission in resource blocks adjacent, in a sub-frame, to the resource blocks used for the device-to device control channel.
5. A method performed by a first user equipment (UE) configured to communicate with a base station via a physical uplink shared channel (PUCCH) and to communicate directly with a second UE using a device-to device control channel and a device-to device shared channel, the method comprising:
receiving, from the base station, device-to device control channel configuration information for identifying a pool of resource blocks to be used for the device-to device control channel signalling between the two UEs;
wherein the device-to device control channel configuration information comprises:
first information identifying a quantity of resource blocks; and
second information identifying a start physical resource block of the device-to device control channel;
determining, based on both the first information and second information, at least one resource to be used for device-to device control channel communication between the first UE and the second UE; and
based on the resource to be used for the device-to device control channel, transmitting the device-to-device shared channel in resource blocks adjacent, in a sub-frame, to the resource blocks used for the device-to device control channel.
6. The method according to the claim 5 , further comprising determining, by the first user equipment (UE), a location of the device-to-device control channel based on the first information and the second information.
7. The method according to the claim 5 , wherein the first information is a number of resource blocks.
8. The method according to the claim 5 , wherein the second information is an offset from an uplink control channel.
9. A first user equipment (UE) that is configured to communicate with a base station via a physical uplink shared channel (PUCCH) and to communicate directly with second UE using a device-to device control channel and a device-to device shared channel, the first UE comprising:
a controller and a transceiver circuit, wherein the controller is configured:
to control the transceiver circuit configured to receive device-to device control channel configuration information for identifying a pool of resource blocks to be used for the device-to device control channel signalling between the two UEs;
wherein the device-to device control channel configuration information comprises:
first information identifying a quantity of resource blocks; and
second information identifying a start physical resource block of the device-to device control channel;
to determine, based on both the first information and the second information, at least one resource to be used for device-to device control channel communication between the first UE and the second UE; and
to control the transceiver to transmit, based on the resource to be used for the device-to-device control channel, the device-to-device shared channel in resource blocks adjacent, in a sub-frame, to the resource blocks used for the device-to device control channel.