METHOD AND APPARATUS FOR PERFORMING DEVICE TO DEVICE SERVICE IN WIRELESS COMMUNICATION SYSTEM
First Claim
1. A method for performing a first communication device supporting a device to device (D2D) service in a wireless communication system, the method comprising:
- receiving a discovery signal including an advertisement identifier (ID) that can be identified in a physical layer of the first communication device from a second communication device supporting the D2D service in a radio resource control (RRC) idle mode;
determining, in the physical layer of the first communication device, whether to receive an additional advertisement signal from the second communication device on the basis of the advertisement ID;
if it is determined to receive the additional advertisement signal, setting up an RRC connection with respect to a base station in response to the discovery signal;
after the RRC connection is set up, transmitting a D2D link setup request message for setting up a D2D link with respect to the second communication device to the base station on the basis of information related to the second communication device and included in the discovery signal;
setting up the D2D link with respect to the second communication device by using a resource scheduled by the base station; and
receiving the additional advertisement signal through the D2D link.
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Accused Products
Abstract
One embodiment of the present invention provides a method and an apparatus for performing device to device (D2D) service in a wireless communication system, and specifically, provides a method for using a discovery signal including an identifier which can be identified in a physical layer and the like when a terminal supporting a D2D service receives a signal related to an advertisement. The invention determines whether to receive an additional advertisement signal on the basis of the identifier. The discovery signal is preferably transmitted in a radio resource control (RRC) idle mode. The D2D terminal that receives the discovery signal communicates with a base station by an improved method having an improved effect with respect to power.
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Citations
10 Claims
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1. A method for performing a first communication device supporting a device to device (D2D) service in a wireless communication system, the method comprising:
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receiving a discovery signal including an advertisement identifier (ID) that can be identified in a physical layer of the first communication device from a second communication device supporting the D2D service in a radio resource control (RRC) idle mode; determining, in the physical layer of the first communication device, whether to receive an additional advertisement signal from the second communication device on the basis of the advertisement ID; if it is determined to receive the additional advertisement signal, setting up an RRC connection with respect to a base station in response to the discovery signal; after the RRC connection is set up, transmitting a D2D link setup request message for setting up a D2D link with respect to the second communication device to the base station on the basis of information related to the second communication device and included in the discovery signal; setting up the D2D link with respect to the second communication device by using a resource scheduled by the base station; and receiving the additional advertisement signal through the D2D link. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A method for performing a first communication device supporting a device to device (D2D) service in a wireless communication system, the method comprising:
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receiving a discovery signal including an advertisement identifier (ID) that can be identified in a physical layer of the first communication device from a second communication device supporting the D2D service in a radio resource control (RRC) idle mode; determining whether to receive an additional signal corresponding to the advertisement ID on the basis of the advertisement ID; if it is determined not to receive the additional signal, discarding the discovery signal; if it is determined to receive the additional signal, determining, in the physical layer of the first communication device, whether a mapping table corresponding to the advertisement ID is stored in the first communication device; if the mapping table corresponding to the advertisement ID is stored in the first communication device, obtaining advertisement contents included in the mapping table; if the mapping table corresponding to the advertisement ID is not stored in the first communication device, setting up an RRC connection with respect to a base station in order to receive an additional advertisement signal from the second communication device; after the RRC connection is set up, transmitting a D2D link setup request message for setting up a D2D link with respect to the second communication device to the base station on the basis of information related to the second communication device and included in the discovery signal; setting up the D2D link with respect to the second communication device by using a resource scheduled by the base station; and receiving the additional advertisement signal through the D2D link. - View Dependent Claims (8, 9)
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10. A first communication device supporting a device to device (D2D) service in a wireless communication system, comprising:
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a wireless processing unit for processing a wireless signal; and a processing unit for controlling the wireless processing unit, wherein the processing unit is configured for; receiving a discovery signal including an advertisement identifier (ID) that can be identified in a physical layer of the first communication device from a second communication device supporting the D2D service in a radio resource control (RRC) idle mode; determining whether to receive an additional signal corresponding to the advertisement ID on the basis of the advertisement ID; if it is determined not to receive the additional signal, discarding the discovery signal; if it is determined to receive the additional signal, determining, in the physical layer of the first communication device, whether a mapping table corresponding to the advertisement ID is stored in the first communication device; if the mapping table is stored in the first communication device, obtaining advertisement contents included in the mapping table; if the mapping table corresponding to the advertisement ID is not stored, setting up an RRC connection with respect to a base station in order to receive an additional advertisement signal from the second communication device; after the RRC connection is set up, transmitting a D2D link setup request message for setting up a D2D link with respect to the second communication device to the base station on the basis of information related to the second communication device and included in the discovery signal; setting up the D2D link with respect to the second communication device by using a resource scheduled by the base station; and receiving the additional advertisement signal through the D2D link.
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Specification