Device-to-device communication method, device and system

Abstract

Embodiments of the present invention provide a device-to-device communication method, device, and system. The method includes acquiring the configuration information of the proximity discovery sent by the base station, the configuration information including the signal duration of the proximity discovery message and the transmission delay time; timing the downlink of the proximity discovery as the start time, and after the transmission delay time, Sending the proximity discovery message of the signal duration of the proximity discovery message, so that the receiving terminal can receive the proximity discovery message at a receiving delay after the downlink timing of the proximity discovery; wherein, the downlink timing of the proximity discovery is the downlink timing of the downlink of the terminal in the cell where the base station is located. The technical solution of the embodiment of the present invention can realize D2D communication on the basis of the existing mobile communication system, can realize proximity discovery on the frequency spectrum of the existing mobile communication system, and can use the timing of the existing communication system to realize the synchronization of proximity discovery.

Description

technical field [0001] Embodiments of the present invention relate to communication technologies, and in particular to a device-to-device communication method, device, and system. Background technique [0002] Device to Device (D2D) communication refers to the direct communication between two communication devices. With the development of mobile communication technology, the realization of D2D communication in mobile communication system has become a useful supplement to future mobile communication technology. Applied to a variety of application scenarios, for example, in social network applications, you can use D2D communication to find nearby friends or people with the same interests; in advertising applications, you can check nearby discount information; in location-based services, You can check nearby restaurants, etc. [0003] Wherein, when implementing D2D communication between mobile terminals in a mobile communication network, how to realize the proximity discovery ...

AI Technical Summary

Problems solved by technology

[0005] Embodiments of the present invention provide a device-to-device communication method, device, and system, which can overcome the existing problem of interference or conflict with frequency resources of a mobile communication system when a synchronization system is used to synchronize proximity discovery and occupy separate frequency resources.

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