Abstract: A method of a first communication device for removing a self-interference signal in a wireless communication system is provided. The method includes receiving a signal having a size less than a first threshold value from a second communication device in a first interval within a first frame, transmitting a first signal to a third communication device in the first interval, and estimating a self-interference channel through which the self-interference signal is transmitted based on the signal received in the first interval and the first signal transmitted in the first interval. The self-interference signal is a signal transmitted by the first communication device and is received by the first communication device through the self-interference channel.

Abstract: One embodiment of the present invention relates to a method for user equipment receiving broadcast feedback information transmitting a message in a wireless communication system, the method for user equipment receiving broadcast feedback information transmitting a message comprising the steps of: broadcasting a first message from a first resource; receiving, from a plurality of user equipment which have received the broadcast, information relating to resource use of the first resource; determining whether to perform resource reselection from resource use of the first resource received from the plurality of user equipment; and transmitting a second message using a reselected resource when the resource reselection is to be performed, wherein the information relating to resource use is a status value corresponding to the number of user equipment using the first resource.

Abstract: An embodiment of the present invention relates to a method for transmitting or receiving a side link signal by a first terminal in a wireless communication system, the method comprising the steps of: selecting a first resource through which the first terminal will transmit a message; determining a second resource, which is determined dependent on the position of the selected first resource and is to be used for performing feedback; and transmitting feedback information on the message and the second resource, wherein the feedback information is feedback information relating to a broadcast message received through at least a part of the second resource.

Abstract: A random access method may include receiving a random access preamble that is uniquely allocated to a User Equipment (UE) from the UE on an extended-Physical Random Access Channel (e-PRACH) and identifying the UE based on the random access preamble.

Abstract: An embodiment of the present invention relates to a method in which a first terminal transmits/receives a message including platoon information in a wireless communication system. The method include: a step for receiving, by a first terminal, resource information from a second terminal in a terminal group forming a platoon; a step of transmitting, by the first terminal, a Cooperative Awareness Message (CAM) including the platoon information after receiving the resource information, wherein when the platoon information is for a terminal not belonging to the terminal group, the first terminal transmits the CAM message through a resource instructed in the resource information.

Abstract: One embodiment of the present invention relates to a method for user equipment receiving broadcast feedback information transmitting a message in a wireless communication system, the method for user equipment receiving broadcast feedback information transmitting a message comprising the steps of: broadcasting a first message from a first resource; receiving, from a plurality of user equipment which have received the broadcast, information relating to resource use of the first resource; determining whether to perform resource reselection from resource use of the first resource received from the plurality of user equipment; and transmitting a second message using a reselected resource when the resource reselection is to be performed, wherein the information relating to resource use is a status value corresponding to the number of user equipment using the first resource.

Abstract: An embodiment of the present invention relates to a method in which a first terminal transmits/receives a message including platoon information in a wireless communication system. The method include: a step for receiving, by a first terminal, resource information from a second terminal in a terminal group forming a platoon; a step of transmitting, by the first terminal, a Cooperative Awareness Message (CAM) including the platoon information after receiving the resource information, wherein when the platoon information is for a terminal not belonging to the terminal group, the first terminal transmits the CAM message through a resource instructed in the resource information.

Abstract: This specification provides a method for performing a discovery procedure in a wireless communication system supporting device to device (D2D) communication. The method is performed by first user equipment and includes monitoring a discovery resource region, selecting a discovery resource for transmitting a discovery message in the discovery resource region, and transmitting the discovery message to second user equipment through the selected discovery resource. The selected discovery resource includes a discovery resource having a received energy level corresponding to a threshold value or less or a threshold value or higher.

Abstract: This specification provides a method for performing a discovery procedure in a wireless communication system supporting device to device (D2D) communication. The method is performed by first user equipment and includes monitoring a discovery resource region, selecting a discovery resource for sending a discovery message in the discovery resource region, and transmitting the discovery message to second user equipment through the selected discovery resource. The discovery resource region includes a first discovery resource region and a second discovery resource region.

Abstract: A random access method may include receiving a random access preamble that is uniquely allocated to a User Equipment (UE) from the UE on an extended-Physical Random Access Channel (e-PRACH) and identifying the UE based on the random access preamble.

Abstract: This specification provides a method for performing a discovery procedure in a wireless communication system supporting device to device (D2D) communication. The method is performed by first user equipment and includes monitoring a discovery resource region, selecting a discovery resource for transmitting a discovery message in the discovery resource region, and transmitting the discovery message to second user equipment through the selected discovery resource. The selected discovery resource includes a discovery resource having a received energy level corresponding to a threshold value or less or a threshold value or higher.

Abstract: This specification provides a method for performing a discovery procedure in a wireless communication system supporting device to device (D2D) communication. The method is performed by first user equipment and includes monitoring a discovery resource region, selecting a discovery resource for sending a discovery message in the discovery resource region, and transmitting the discovery message to second user equipment through the selected discovery resource. The discovery resource region includes a first discovery resource region and a second discovery resource region.

Abstract: A fouling free clean EGR system for a diesel-gasoline dual fuel powered engine allows re-circulation of an exhaust gas of a certain cylinder among a plurality of cylinders. The fouling free clean exhaust gas recirculation (EGR) system for a diesel-gasoline dual fuel powered engine in which gasoline and air are pre-mixed and supplied to cylinders and then a diesel fuel is injected and combusted together comprises a directly-exhaust cylinder of which an exhaust valve of the cylinder is connected to an exhaust manifold directly connected to a after treatment device; and an EGR cylinder of which an exhaust valve of the cylinder is connected to an EGR line and which supplies the EGR gas to the diesel-gasoline dual fuel powered engine.

Abstract: A method for forming a selective emitter of a solar cell and a diffusion apparatus for forming the same are provided. The method includes texturing a surface of a silicon substrate by etching the silicon substrate, coating an impurity solution on the surface of the silicon substrate, injecting a first thermal energy into the whole surface of the silicon substrate, and, while the first thermal energy is injected into the whole surface of the silicon substrate, injecting a second thermal energy by irradiating a laser beam into a partial region of the surface of the silicon substrate.

Abstract: A method for forming a selective emitter of a solar cell and a diffusion apparatus for forming the same are provided. The method includes texturing a surface of a silicon substrate by etching the silicon substrate, coating an impurity solution on the surface of the silicon substrate, injecting a first thermal energy into the whole surface of the silicon substrate, and, while the first thermal energy is injected into the whole surface of the silicon substrate, injecting a second thermal energy by irradiating a laser beam into a partial region of the surface of the silicon substrate.