Discovery method and apparatus in device-to-device direct communication

摘要

A discovery method is provided by a device in a D2D direction communication. The device selects a discovery resource unit from among discovery resource units which are not being used after listening during one or more discovery resource periods. The device transmits a first discovery signal through the selected discovery resource unit in a broadcasting manner at a first discovery resource period, and transmits a second discovery signal through the selected discovery resource unit in a query-based manner at a second discovery resource period.

主权项

1. A discovery method by a device in a device-to-device (D2D) direction communication, the method comprising:
listening during one or more discovery resource periods; selecting a discovery resource unit from among discovery resource units which are not being used after listening; and transmitting a discovery signal through the selected discovery resource unit in a manner corresponding to one of a plurality of types of the discovery signal, wherein discovery signals of a first subset of the plurality of types are transmitted in a broadcasting manner, and discovery signals of a second subset of the plurality of types are transmitted in a query-based manner; and the transmitting the discovery signal includes:
determining whether a type of a first discovery signal to be transmitted for a first discovery resource period belongs to the first subset or the second subset;transmitting the first discovery signal in broadcasting manner at the first discovery resource period when the type of the first discovery signal belongs to the first subset;determining whether a type of a second discovery signal to be transmitted for a second discovery resource period belongs to the first subset or the second subset; andtransmitting the second discovery signal in the query-based manner at the second discovery resource period when the type of the second discovery signal belongs to the second subset.