METHOD AND DEVICE FOR INTER-DEVICE COMMUNICATION

• US 20180035276A1
• Filed: 04/08/2016
• Published: 02/01/2018
• Est. Priority Date: 04/09/2015
• Status: Active Grant

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: Kang, Hyun-Jeong, Ro, Sang-Min, Agiwal, Anil, Chang, Young-Bin, Hwang, June
• Granted Patent: US 10,856,128 B2
• Time in Patent Office: Days
• CPC Class Codes: H04W 48/08 Access restriction or access information delivery, e.g. discovery data delivery signalling during connection H04W76/00
• CPC Class Codes: H04W 72/02 Selection of wireless resources by user or terminal
• CPC Class Codes: H04W 72/51 based on terminal or device properties
• CPC Class Codes: H04W 76/14 Direct-mode setup
• CPC Class Codes: H04W 76/50 for emergency connections
• CPC Class Codes: H04W 8/005 Discovery of network devices, e.g. terminals
• CPC Class Codes: H04W 88/04 adapted for relaying to or from another terminal or user

Abstract

The present disclosure relates to a 5G or pre-5G communication system to be provided in order to support a higher data transmission rate following 4G communication systems such as LTE. Disclosed are a method and device for improving device searching in a D2D communication system supporting direct communication between devices. The method comprises the steps of: generating a search signal including search information; selecting a transmission resource to transmit the search signal; transmitting the search signal through the selected transmission resource; and when a request signal requesting additional information on the search from a counterpart device that has received the search signal is received, transmitting a confirmation signal including the requested additional information to the counterpart device. The present disclosure relates to a communication technique and system which combine a 5G communication system, for supporting a higher data transmission rate following 4G systems, with IoT technology.

Claims

1. A discovery method for device to device (D2D) communication, comprising:

generating a discovery signal including discovery information;

selecting a transmission resource to transmit the discovery signal;

transmitting the discovery signal through the selected transmission resource; and

when a request signal for additional information associated with the discovery is received from a counterpart device that has received the discovery signal, transmitting a confirmation signal including the requested additional information to the counterpart device.

2. The discovery method of claim 1,

wherein the discovery signal includes at least one of a PDCP packet including a relay UE discovery indicator that is related to a relay UE that transmits the discovery signal, a MAC packet including the relay UE discovery indicator, a physical layer packet including the relay UE discovery indicator, or a resource allocation indicator that is masked by the relay UE discovery indicator,

the MAC packet includes a version field, a reserved field, a source field, and a destination field, the version field is used to instruct a relay UE discovery or group member discovery, and one value of the reserved field is used to instruct the relay UE discovery or the group member discovery, and

the source field includes at least one of a relay UE identifier, a group identifier, or an application identifier, and the destination field includes an identifier of a device for receiving the discovery signal or the group identifier.

3. The discovery method of claim 1, wherein the discovery signal includes at least one of a PDCP packet including a discovery indicator indicating that the discovery is performed to provide a service by a device for transmitting the discovery signal, a MAC packet including the discovery indicator, a physical layer packet including the discovery indicator, a resource allocation indicator that is masked by the discovery indicator, or a discovery message including a service layer signaling format.

4. The discovery method of claim 1, wherein the discovery signal includes an identifier indicating service information or group information, provided by a device for transmitting the discovery signal.

5. The discovery method of claim 1, wherein the discovery information includes at least one of a relay UE identifier associated with a relay UE that transmits the discovery signal, a group identifier, a Public Land Mobile Network (PLMN) identifier, Access Point Name (APN) information, or an application identifier.

6. The discovery method of claim 1, wherein the discovery information includes at least one of a group identifier associated with a device for generating the discovery signal, a service identifier, or a device identifier.

7. The discovery method of claim 1, further comprising receiving a request signal from the counterpart device prior to transmitting the discovery signal,

wherein the request signal includes at least one of a PDCP packet including a relay UE discovery indicator associated with a relay UE for transmitting the discovery signal, a MAC packet including the relay UE discovery indicator, a physical layer packet including the relay UE discovery indicator, a resource allocation indicator that is masked by the relay UE discovery indicator, or a relay request message including a service layer signaling format.

8. The discovery method of claim 7, wherein the request signal includes at least one of a PDCP packet including a group discovery request indicator, a MAC packet including the group discovery request indicator, a physical layer packet including a group discovery request identifier, a resource allocation indicator that is masked by the group discovery request indicator, or a group discovery request message including a service layer signaling format.

9. The discovery method of claim 1, wherein the request signal includes at least one of a device identifier associated with a device that transmits the request signal, a group identifier, a PLMN identifier, and APN information, or information on a physical channel used for the transmission of the discovery signal.

10. The discovery method of claim 1, wherein the additional information includes at least one of a device identifier associated with a device that transmits the discovery signal, a group identifier, a PLMN identifier, APN information, a service identifier, service information, group information, or information on a physical channel used for the transmission of the discovery signal.

11. A discovery method for device to device (D2D) communication, comprising:

receiving a discovery signal including discovery information from a counterpart device;

checking the discovery information acquired from the discovery signal;

transmitting, to the counterpart device, a request signal for additional information required for performing a discovery on the basis of the discovery information; and

receiving, from the counterpart device, a confirmation signal including the additional information in response to the request signal.

12. An apparatus for performing device to device (D2D) communication, comprising:

a processor configured to generate a discovery signal including discovery information, and to select a transmission resource to transmit the discovery signal;

a transmitter configured to transmit the discovery signal through the selected transmission resource; and

a receiver configured to receive, from a counterpart device that has received the discovery signal, a request signal for additional information associated with discovery,

wherein the processor controls the transmitter so as to transmit a confirmation signal including the requested additional information to the counterpart device.

16. The apparatus of claim 12,

wherein the discovery signal includes at least one of a PDCP packet including a relay UE discovery indicator that is related to a relay UE that transmits the discovery signal, a MAC packet including the relay UE discovery indicator, a physical layer packet including the relay UE discovery indicator, or a resource allocation indicator that is masked by the relay UE discovery indicator,

the MAC packet includes a version field, a reserved field, a source field, and a destination field, the version field is used to instruct a relay UE discovery or group member discovery, and one value of the reserved field is used to instruct the relay UE discovery or the group member discovery, and

the source field includes at least one of a relay UE identifier, a group identifier, or an application identifier, and the destination field includes an identifier of a device for receiving the discovery signal or the group identifier.

17. The apparatus of claim 12, wherein the discovery signal includes at least one of a PDCP packet including a discovery indicator indicating that the discovery is performed to provide a service by a device for transmitting the discovery signal, a MAC packet including the discovery indicator, a physical layer packet including the discovery indicator, a resource allocation indicator that is masked by the discovery indicator, or a discovery message including a service layer signaling format.

18. The apparatus of claim 12, wherein the discovery signal includes an identifier indicating service information or group information, provided by a device for transmitting the discovery signal.

19. The apparatus of claim 12, wherein the discovery information includes at least one of a group identifier associated with a device for generating the discovery signal, a service identifier, or a device identifier.

20. The apparatus of claim 12, wherein the receiver is further configured to receive a request signal from the counterpart device prior to the transmitter transmitting the discovery signal,

wherein the request signal includes at least one of a PDCP packet including a relay UE discovery indicator associated with a relay UE for transmitting the discovery signal, a MAC packet including the relay UE discovery indicator, a physical layer packet including the relay UE discovery indicator, a resource allocation indicator that is masked by the relay UE discovery indicator, or a relay request message including a service layer signaling format.

13. An apparatus for performing device to device (D2D) communication, comprising:

a receiver configured to receive a discovery signal including discovery information from a counterpart device;

a processor configured to check the discovery information acquired from the discovery signal; and

a transmitter configured to transmit a request signal, to the counterpart device based on the discovery information., for additional information required to perform a discovery,

wherein the processor receives, from the counterpart device, a confirmation signal including the additional information through the receiver, in response to the request signal.

14. A method for communication between devices, comprising:

when an event occurs in a device, determining whether transmission of event information indicating the event occurrence to other devices within a predetermined range is possible within a predetermined time;

when, as a result of the determination, the transmission of the event information is possible, transmitting the event information using a device to device direct communication method; and

when, as a result of the determination, the transmission of the event information is not possible, transmitting the event information to other devices according to a local transmission method that bypasses a base station.

15. An apparatus for communication between devices, comprising:

a controller configured to, when an event occurs in a device, determine whether transmission of event information indicating the event occurrence to other devices within a predetermined range is possible within a predetermined time; and

a transceiver configured to;

when, as a result of the determination, the transmission of the event information is possible, transmit the event information using a device to device direct communication method, and

when, as a result of the determination, the transmission of the event information is not possible, transmit the event information to other devices according to a local transmission method that bypasses a base station.