Method and apparatus for transmission/reception of signals between wireless devices
地域：
Seoul
摘要
A method and apparatus for supporting a device-to-device (D2D) communication between user equipments (UEs) are provided. The method of a device-to-device (D2D) communication between user equipments (UEs), the method includes: receiving, at a transmission (Tx) UE, resource assignment information transmitted from an evolved NodeB (eNB), the resource assignment information being associated with a D2D discovery signal to be transmitted in a discovery period; determining, at the Tx UE, that a D2D discovery signal associated with a first discovery type and a D2D discovery signal associated with a second discovery type are to be transmitted in a first subframe included in the discovery period; and in the first subframe, transmitting the D2D discovery signal associated with the second discovery type and dropping the D2D discovery signal associated with the first discovery type.
說(shuō)明書
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This application is a continuation of U.S. application Ser. No. 16/148,021, filed on Oct. 1, 2018, which is a continuation of U.S. application Ser. No. 15/699,267, filed on Sep. 8, 2017, which is a continuation of U.S. application Ser. No. 14/819,201, filed on Aug. 5, 2015, which claims priority from and the benefit of Korean Patent Application Nos. 10-2014-0102675, filed on Aug. 8, 2014, and 10-2014-0162802, filed on Nov. 20, 2014, all of which are hereby incorporated by reference in its entirety.
The present disclosure relates to wireless communication and, more particularly, to a method and apparatus for transmitting and receiving a Device-to-Device (D2D) signal.
Long Term Evolution (LTE) of 3rd Generation Partnership Project (3GPP) allows supporting a Proximity Service (ProSe) so as to satisfy demands associated with public safety. As a discovery technology and broadcasting communication are added to the ProSe, there is a desire for a technology for providing compatibility in an LTE system.
Device-to-device (D2D) communication relates to a communication method having been available since the era of an analog two-way radio and has been used over the very long history. However, D2D communication in a wireless communication system is distinguished from existing D2D communication.
權(quán)利要求
What is claimed is:1. A wireless device comprising:a wireless transceiver configured to:receive resource assignment information transmitted from a base station, the resource assignment information being associated with one or more discovery signals to be transmitted in a discovery period; and transmit one or more discovery signals to a second wireless device; and one or more processors configured to:determine that a first discovery signal associated with a first discovery type and a second discovery signal associated with a second discovery type are to be transmitted in a first transmission time interval (TTI) included in the discovery period; and in the first TTI, transmit the second discovery signal associated with the second discovery type and drop the first discovery signal associated with the first discovery type, wherein the one or more processors is configured to drop a scheduled transmission of a third discovery signal in response to determining that a control signal and the third discovery signal are to be transmitted in a second TTI, wherein in the second TTI, the wireless transceiver is configured to transmit the control signal without transmitting the third discovery signal, and wherein the second TTI is included in the discovery period or a second discovery period. 2. The wireless device of claim 1 , wherein:the first discovery type corresponds to a discovery type for a device-to-device (D2D) discovery signal transmission, wherein one or more transmission resources for the first discovery type is determined, by the wireless device, from a resource pool; and the second discovery type corresponds to a discovery type for a D2D discovery signal transmission, wherein one or more transmission resources for the second discovery type are configured by the base station. 3. The wireless device of claim 2 , wherein the wireless transceiver is configured to receive, from the base station, information of the resource pool for a D2D discovery signal transmission associated with the first discovery type, andthe one or more processors is configured to randomly select a transmission resource within the resource pool to execute the D2D discovery signal transmission associated with the first discovery type. 4. The wireless device of claim 2 , wherein the wireless transceiver is configured to receive, from the base station, information of a dedicated discovery resource for a D2D discovery signal transmission associated with the second discovery type; andwherein the wireless transceiver is configured to execute the D2D discovery signal transmission associated with the second discovery type using the dedicated discovery resource. 5. The wireless device of claim 1 , wherein the wireless transceiver is configured to transmit the first discovery signal associated with the first discovery type in a third TTI in response to determining, by the one or more processors, that the second discovery signal associated with the second discovery type is not scheduled for transmission in the third TTI, wherein the third TTI is included in the discovery period or the second discovery period. 6. The wireless device of claim 1 , wherein the one or more processors is configured to drop a scheduled transmission of a data signal in response to determining that a third discovery signal and the data signal are to be transmitted in a third TTI; andwherein in the third TTI, the wireless transceiver is configured to transmit the third discovery signal without transmitting the data signal, wherein the third TTI is included in the discovery period or the second discovery period. 7. A wireless device comprising:a wireless transceiver configured to:receive resource assignment information transmitted from a base station, the resource assignment information being associated with one or more discovery signals to be transmitted in a discovery period; and transmit one or more discovery signals to a second wireless device; and one or more processors configured to:determine that a first discovery signal associated with a first discovery type and a second discovery signal associated with a second discovery type are to be transmitted in a first transmission time interval (TTI) included in the discovery period; and in the first TTI, transmit the second discovery signal associated with the second discovery type and drop the first discovery signal associated with the first discovery type, wherein the wireless transceiver is configured to transmit the first discovery signal associated with the first discovery type in a second TTI in response to determining, by the one or more processors, that the second discovery signal associated with the second discovery type is not scheduled for transmission in the second TTI, wherein the second TTI is included in the discovery period or a second discovery period. 8. The wireless device of claim 7 , wherein:the first discovery type corresponds to a discovery type for a device-to-device (D2D) discovery signal transmission, wherein one or more transmission resources for the first discovery type is determined, by the wireless device, from a resource pool; and the second discovery type corresponds to a discovery type for a D2D discovery signal transmission, wherein one or more transmission resources for the second discovery type are configured by the base station. 9. The wireless device of claim 8 , wherein the wireless transceiver is configured to receive, from the base station, information of the resource pool for a D2D discovery signal transmission associated with the first discovery type, andthe one or more processors is configured to randomly select a transmission resource within the resource pool to execute the D2D discovery signal transmission associated with the first discovery type. 10. The wireless device of claim 8 , wherein the wireless transceiver is configured to receive, from the base station, information of a dedicated discovery resource for a D2D discovery signal transmission associated with the second discovery type, andwherein the wireless transceiver is configured to execute the D2D discovery signal transmission associated with the second discovery type using the dedicated discovery resource. 11. The wireless device of claim 7 , wherein the one or more processors is configured to drop a scheduled transmission of a third discovery signal in response to determining that a control signal and the third discovery signal are to be transmitted in a third TTI, andwherein in the third TTI, the wireless transceiver is configured to transmit the control signal without transmitting the third discovery signal, wherein the third TTI is included in the discovery period or the second discovery period. 12. The wireless device of claim 7 , wherein the one or more processors is configured to drop a scheduled transmission of a data signal in response to determining that a third discovery signal and the data signal are to be transmitted in a third TTI, andwherein in the third TTI, the wireless transceiver is configured to transmit the third discovery signal without transmitting the data signal, wherein the third TTI is included in the discovery period or the second discovery period. 13. The wireless device of claim 7 , wherein each of the first TTI and the second TTI corresponds to a subframe. 14. A method comprising:receiving, by a first wireless device, resource assignment information transmitted from a base station, the resource assignment information being associated with one or more discovery signals to be transmitted in a discovery period; determining that a first discovery signal associated with a first discovery type and a second discovery signal associated with a second discovery type are to be transmitted in a first transmission time interval (TTI) included in the discovery period; in the first TTI:transmitting, from the first wireless device to a second wireless device, the second discovery signal associated with the second discovery type; and dropping the first discovery signal associated with the first discovery type; determining that the second discovery signal associated with the second discovery type is not scheduled for transmission in a second TTI; and in the second TTI, transmitting, by the first wireless device, the first discovery signal associated with the first discovery type, wherein the second TTI is included in the discovery period or a second discovery period. 15. The method of claim 14 , wherein:the first discovery type corresponds to a discovery type for a device-to-device (D2D) discovery signal transmission, wherein one or more transmission resources for the first discovery type is determined, by the first wireless device, from a resource pool; and the second discovery type corresponds to a discovery type for a D2D discovery signal transmission, wherein one or more transmission resources for the second discovery type are configured by the base station. 16. The method of claim 15 , further comprising:receiving, from the base station, information of the resource pool for a D2D discovery signal transmission associated with the first discovery type; and randomly selecting a transmission resource within the resource pool to execute the D2D discovery signal transmission associated with the first discovery type. 17. The method of claim 15 , further comprising:receiving, from the base station, information of a dedicated discovery resource for a D2D discovery signal transmission associated with the second discovery type; and executing the D2D discovery signal transmission associated with the second discovery type using the dedicated discovery resource. 18. The method of claim 14 , further comprising:dropping a scheduled transmission of a third discovery signal in response to determining that a control signal and the third discovery signal are to be transmitted in a third TTI; and in the third TTI, transmitting the control signal without transmitting the third discovery signal, wherein the third TTI is included in the discovery period or the second discovery period. 19. The method of claim 14 , further comprising:dropping a scheduled transmission of a data signal in response to determining that a third discovery signal and the data signal are to be transmitted in a third TTI; and in the third TTI, transmitting the third discovery signal without transmitting the data signal, wherein the third TTI is included in the discovery period or the second discovery period. 20. The method of claim 14 , wherein each of the first TTI and the second TTI corresponds to a subframe.
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