Method, Device, and System for Establishing Device-To-Device Connection

A method for establishing a device-to-device connection, the method comprising:

• receiving, by an evolved base station (eNB), a device-to-device (D2D) authentication response message of a first device sent by a mobility management entity MME that serves the first device;
• transferring, by the eNB, the authentication response message to the first device, so that the first device enables, according to the authentication response message, D2D monitoring and broadcasting functions;
• receiving, by the eNB, a connection establishment request message sent by the first device when the first device detects a second device, wherein the connection establishment request message carries D2D identifier information of the second device, wherein the first device and the second device are two devices in D2D communication;
• and
• establishing, by the eNB according to the D2D identifier information of the second device, a D2D communication link between the first device and the second device.

A method for establishing a device-to-device connection, the method comprising:

• receiving, by a mobility management entity (MME) that serves a first device, a device-to-device (D2D) authentication request sent by the first device;
• authenticating the first device;
• and
• transferring, by the MME, a D2D authentication response message to the first device by using an evolved base station (eNB) that serves the first device, so that the first device enables, according to the D2D authentication response message, D2D monitoring and broadcasting functions and, when detecting a second device, sends a connection establishment request message to the eNB, and so that further the eNB establishes, after receiving the connection establishment request message sent by the first device and according to identifier information of the second device detected by the first device, a D2D communication link between the first device and the second device, wherein the first device and the second device are two devices in D2D communication.

A first device in device-to-device communication, wherein the first device comprises:

• a sending module, configured to send a device-to-device (D2D) authentication request to a mobility management entity (MME) that serves the first device, so as to trigger the MME to authenticate the first device;
• an enabling module, configured to receive an D2D authentication response message transferred by the MME by using an evolved base station (eNB) that serves the first device and to enable, according to the D2D authentication response message, D2D monitoring and broadcasting functions;
• and
• a connecting module, configured to send a connection establishment request message to the eNB when the enabling module detects a second device in the D2D communication, wherein the connection establishment request message carries D2D identifier information of the second device, so as to trigger the eNB to establish, according to the D2D identifier information of the second device, a D2D communication link between the first device and the second device.

An evolved base station comprising:

• a receiving module, configured to receive a device-to-device (D2D) authentication response message of a first device sent by a mobility management entity (MME) that serves the first device;
• a processing module, configured to transfer the authentication response message to the first device, so that the first device enables, according to the authentication response message, D2D monitoring and broadcasting functions;
• and
• a connecting module, configured to, receive a connection establishment request message sent by the first device when the first device detects a second device, wherein the connection establishment request message carries D2D identifier information of the second device, and to establish, according to the identifier information of the second device, a D2D communication link between the first device and the second device, wherein the first device and the second device are two devices in D2D communication.