Method and apparatus for managing access information for registration of device in smart home service

1. A method of managing access information for registration of a first device, by a second device, in a smart home service, the method comprising the steps of:

checking a validity period of a refresh token for updating an access token of the first device included in a device list for the smart home service, which is received from a server; and

requesting, by the second device, the server to re-register the first device, if a period from a current time until an end of the validity period is less than a predetermined threshold period.

2. The method of claim 1 , wherein checking the validity period of the refresh token comprises checking a first flag indicating that the validity period of the refresh token of the first device has expired.

3. The method of claim 1 , wherein checking the validity period of the refresh token comprises:

acquiring an update time of the refresh token of the first device from the device list; and

calculating a time difference between the current time and the update time, wherein the time difference is the period from the current time until the end of the validity period.

4. The method of claim 1 , wherein requesting the server to re-register the first device comprises instructing the server to set a second flag indicating re-registration of the first device to the device list.

5. A method of managing access information for registration of a first device, by a service server, in a smart home service, the method comprising the steps of:

transmitting a device list for the smart home service, to a second device, which is requested by the second device and includes a validity period of a refresh token of the first device and a first flag indicating whether the validity period of the refresh token has expired; and

receiving a request, from the second device, for re-registering the first device if a period from a current time until an end of the validity period is less than a predetermined threshold period.

6. The method of claim 5 , further comprising:

re-registering the first device;

setting a second flag indicating re-registration of the first device to the device list; and

transmitting the device list to the second device, after the request for re-registering the first device is received from the second device.

7. The method of claim 5 , further comprising updating the validity period of the refresh token of the first device, based on an update time of the refresh token acquired from an update result of the refresh token, which is received from an account server.

8. A controller device for managing access information for registration of a first device in a smart home service, the controller device comprising:

a transceiver; and

a controller configured to check a validity period of a refresh token for updating an access token of the first device included in a device list for the smart home service, which is received from a server, and to control the transceiver to request the server to re-register the first device, when a period from a current time until an end of the validity period is less than a predetermined threshold period.

9. The controller device of claim 8 , wherein the controller is further configured to check a first flag indicating that the validity period of the refresh token of the first device has expired.

10. The controller device of claim 8 , wherein the controller is further configured to acquire an update time of the refresh token of the first device from the device list, and calculate a time difference between the current time and the update time, the time difference being the period from the current time until the end of the validity period.

11. The controller device of claim 8 , wherein the controller is further configured to control the transceiver to transmit an instruction for instructing the server to set a second flag indicating re-registration of the first device to the first device, to the server.

12. A service server for managing access information for registration of a first device in a smart home service, the service server comprising:

a transceiver; and

a controller configured to:

control the transceiver to transmit a device list for the smart home service, to a second device, which is requested by the second device and includes a validity period of a refresh token of the first device and a first flag indicating whether the validity period of the refresh token has expired, and

control the transceiver to receive a request, from the second device, for re-registering the first device, if a period from a current time until an end of the validity period is less than a predetermined threshold period.

13. The service server of claim 12 , wherein the controller is further configured to:

re-register the first device;

set a second flag indicating re-registration of the first device to the device list; and

control the transceiver to transmit the device list to the second device, after the request for re-registering the first device is received from the second device.

14. The service server of claim 12 , wherein the controller is further configured to update the validity period of the refresh token of the first device, based on an update time of the refresh token acquired from an update result of the refresh token, which is received from an account server.