Method for allocating wireless resources in wireless access system and device therefore
The present invention pertains to a method for allocating wireless resources used in device-to-device communication in a wireless access system which supports device-to-device communication, and a device therefore. Specifically, the invention includes a step for receiving resource control information through a control channel from a base station during device-to-device communication of a first device and a second device, and a step for allocating wireless resources which do not interfere in the device-to-device communication of another device and the second device by using resource control information of the first device when interference with another device occurs due to device-to-device communication of the first device and the second device.
1. A method of allocating a radio resource, which is used for device-to-device (D2D) communication in a wireless access system supportive of the D2D communication, the method, performed in a first device, comprising:
receiving resource control information through a control channel from a base station while the first device performs the D2D communication with a second device; and
allocating a radio resource, based on the resource control information, for the D2D communication between the first device and the second device;
wherein the allocation of the radio resource does not cause interference with a third device,
wherein the resource control information for the D2D communication is transmitted through an e-PDCCH (enhanced Physical Downlink Control Channel), and additional information on the e-PDCCH is transmitted through a legacy PDCCH with a size of one CCE (control channel element), and
wherein the resource control information for the D2D communication includes speed information on the second device and moving direction information on the second device.
2. The method of claim 1 , wherein the resource control information comprises at least one selected from the group consisting of a resource use information on the radio resource of a cell or sector having the D2D communication between the first device and the second device performed therein, a channel quality information between the second device and the base station, and a coordinates (position) information of the second device.
3. The method of claim 2 , wherein the resource use information comprises one of an information indicating whether the radio resource of the cell or the sector is used and an information indicating whether the radio resource of the cell or the sector is used for a communication with a cellular network or the D2D communication.
4. The method of claim 2 , wherein the channel quality information is transmitted when the mobility information of the second device or the coordinates (position) information of the second device is changed over a predetermined level.
5. The method of claim 2 , wherein each of the moving direction information and the speed information is divided by steps.
6. The method of claim 1 , wherein the radio resource is allocated in a manner of allocating the radio resource configured not to cause the interference with the third device using a channel quality information with the second device.
7. The method of claim 1 , wherein the control channel is transmitted in a foremost OFDM (orthogonal frequency division multiplex) symbol of a subframe.
8. An apparatus for allocating a radio resource, which is used for device-to-device (D2D) communication in a wireless access system supportive of the D2D communication, the apparatus comprising:
an RF (radio frequency) unit configured to transceive radio signals; and
a processor which is configured to:
receive a resource control information through a control channel from a base station while performing the D2D communication with a second device, the processor; and
allocate a radio resource, based on the resource control information, for the D2D communication between the first device and the second device,
wherein the allocation of the radio resource does not cause interference with a third device,
wherein the resource control information for the D2D communication is transmitted through an e-PDCCH (enhanced Physical Downlink Control Channel), and additional information on the e-PDCCH is transmitted through a legacy PDCCH with a size of one CCE (control channel element), and
wherein the resource control information for the D2D communication includes speed information on the second device and moving direction information on the second device.
9. The apparatus of claim 8 , wherein the resource control information comprises at least one selected from the group consisting of a resource use information on the radio resource of a cell or sector having the D2D communication between the first device and the second device performed therein, a channel quality information between the second device and the base station, and a coordinates (position) information of the second device.
10. The apparatus of claim 9 , wherein the resource use information comprises one of an information indicating whether the radio resource of the cell or the sector is used and an information indicating whether the radio resource of the cell or the sector is used for a communication with a cellular network or the D2D communication.
11. The apparatus of claim 9 , wherein the channel quality information is transmitted when the mobility information of the second device or the coordinates (position) information of the second device is changed over a predetermined level.
12. The apparatus of claim 9 , wherein each of the moving direction information and the speed information is divided by steps.
13. The apparatus of claim 8 , wherein the processor allocates the radio resource configured not to cause the interference with the 3rd device using a channel quality information with the second device.
14. The apparatus of claim 8 , wherein the control channel is transmitted in a foremost OFDM (orthogonal frequency division multiplex) symbol of a subframe.