Discovery method and apparatus in device-to-device direct communication
First Claim
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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; and
transmitting 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.
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Abstract
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.
15 Citations
20 Claims
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1. A discovery method by a device in a device-to-device (D2D) direction communication, the method comprising:
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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; and transmitting 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. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A discovery method by a device in a device-to-device device (D2D) direct communication, the method comprising:
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periodically transmitting a discovery signal through a discovery resource unit in a manner corresponding to one of a plurality of types of the discovery signal; and receiving discovery signals from other devices through other discovery resource units, 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; wherein 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, and transmitting 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; and wherein the discovery signal includes a type field for indicating any one type of plurality of types having the first subset including a device advertisement type and a service advertisement type, and the second subset including a service information request type, a service information response type, a peer search request type, and peer search response type, and an identifier field including identifier information according to the type indicated by the type field. - View Dependent Claims (15, 16, 17, 18, 19)
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20. A discovery apparatus in a device-to-device direction communication, the apparatus comprising:
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a processor configured to select a discovery resource unit from among discovery resource units which are not being used after listening during one or more discovery resource periods; and a transceiver configured to transmit 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 the 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, and transmitting 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.
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Specification