METHOD AND APPARATUS FOR RECONNECTION IN SHORT-RANGE WIRELESS COMMUNICATION

• US 20150230285A1
• Filed: 06/04/2014
• Published: 08/13/2015
• Est. Priority Date: 02/10/2014
• Status: Active Grant

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: LEE, Joo-Hyung, PARK, Chun-Ho, KANG, Dae-Hui, HONG, Ji-Seon
• Granted Patent: US 9,414,426 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: H04W 4/80 Services using short range communication, e.g. near-field communication [NFC], radio-frequency identification [RFID] or low energy communication
• CPC Class Codes: H04W 76/19 Connection re-establishment
• CPC Class Codes: H04W 84/18 Self-organising networks, e.g. ad-hoc networks or sensor networks

Abstract

A method of reconnecting communication with a second device by a first device in short-range wireless communication is provided. The method includes, when it is determined that a link loss is generated at a link with the second device, adjusting a scanning period of advertisement data broadcasted by the second device and a size of a scan window in which the scanning is performed, according to a time during which the link loss continues; and scanning the advertisement data at each of the adjusted scanning periods in the scan window corresponding to the adjusted size.

Claims

1. A method of reconnecting communication with a second device by a first device in short-range wireless communication, the method comprising:

when it is determined that a link loss is generated at a link with the second device, adjusting a scanning period of advertisement data broadcasted by the second device and a size of a scan window in which scanning is performed, according to a time during which the link loss continues; and

scanning the advertisement data at each of the adjusted scanning periods in the scan window corresponding to the adjusted size.

2. The method of claim 1, wherein adjusting the scanning period and the size of the scan window comprises, when the time during which the link loss continues has a value within a predetermined range, adjusting the scanning period to be smaller than a predetermined period, and adjusting the size of the scan window to be larger than a predetermined size.

3. A method of reconnecting communication with a second device by a first device in short-range wireless communication, the method comprising:

when it is determined that link loss is generated at a link with the second device, identifying a broadcasting period of advertisement data transmitted from the second device;

identifying a target time value for reconnection with the second device;

adjusting a size of a scan window in consideration of the broadcasting period and the target time value; and

scanning the advertisement data in the scan window corresponding to the adjusted size.

4. The method of claim 3, wherein adjusting the size of the scan window comprises:

identifying first information including a target time spent for discovering the second device according to the size of the scan window, stored for the broadcasting period of each device; and

adjusting the size of the scan window to a size of a scan window of a target time corresponding to the target time value among the first information.

5. The method of claim 3, further comprising:

identifying second information including a target time spent for discovering the second device according to the scanning period stored for the broadcasting period of each device; and

adjusting the scanning period to a scanning period of a target time corresponding to the target time value among the second information.

6. A method of reconnecting communication with a second device by a first device in short-range wireless communication, the method comprising:

determining a scanning period of advertisement data broadcasted from the second device through communication with the second device;

when it is determined that link loss is generated at a link with the second device, adjusting the scanning period of the advertisement data broadcasted from the second device to the determined period; and

scanning the advertisement data at each of the adjusted scanning periods.

7. The method of claim 6, wherein adjusting the scanning period of the advertisement data comprises:

when link generating with the second device is performed, storing an error value generated while identifying the link generation; and

adjusting the scanning period of the advertisement data by adding the error value to the adjusted scanning period.

8. The method of claim 7, further comprising:

calculating an error probability generated when scanning the advertisement data, as the error value is generated;

adjusting a size of a scan window in which the scanning is performed, by using the calculated error probability.

9. The method of claim 7, further comprising:

when an error value generated in time information of the first device is larger than an error value generated in external time information, adjusting the adjusted scanning period by adding the error value generated in the external time information.

10. A method of reconnecting communication with a first device by a second device in short-range wireless communication, the method comprising:

receiving an advertisement data transmission period request from the first device; and

transmitting, to the first device, a period in which the second device transmits advertisement data, in response to the request.

11. A method of reconnecting communication with a first device by a second device in short-range wireless communication, the method comprising:

determining a transmission period of advertisement data broadcasted to the first device, through communication with the first device;

when a link loss is generated at a link with the first device, adjusting the transmission period of the advertisement data broadcasted to the first device to the determined period; and

broadcasting the advertisement data at each adjusted transmission period.

12. The method of claim 11, wherein adjusting the transmission period of the advertisement data comprises:

when link generation with the first device is performed, storing an error value generated while identifying the link generation; and

adjusting the transmission period of the advertisement data by adding the error value to the adjusted transmission period.

13. The method of claim 12, further comprising:

when an error value generated in time information of the second device is larger than an error value generated in external time information, adjusting the adjusted transmission period by adding the error value generated in the external time information thereto.

14. A first device for reconnecting communication with a second device in short-range wireless communication, the first device comprising:

a controller configured to, when a link loss is generated at a link with the second device, adjust a scanning period of advertisement data broadcasted by the second device and a size of a scan window in which the scanning is performed, according to a time during which the link loss continues; and

a short-range communication unit configured to scan the advertisement data at each of the adjusted scanning periods in the scan window corresponding to the adjusted size.

15. The first device of claim 14, wherein when the time during which the link loss continues has a value within a predetermined range, the controller is configured to adjust the scanning period to be less than a predetermined period, and the size of the scan window to be larger than a predetermined size.

16. A first device for reconnecting communication with a second device in short-range wireless communication, the first device comprising:

a controller configured to, when it is determined that link loss is generated at a link with the second device, identifies a broadcasting period of advertisement data transmitted from the second device, identify a target time value for reconnection with the second device, and adjust a size of a scan window in consideration of the broadcasting period and the target time value; and

a short-range communication unit configured to scan the advertisement data in the scan window corresponding to the adjusted size.

17. The first device of claim 16, wherein the controller is configured to identify first information including a target time spent for discovering the second device according to the size of the scan window, stored for the broadcasting period of each device, and to adjust the size of the scan window to a size of a scan window of a target time corresponding to the target time value among the first information.

18. The first device of claim 16, wherein the controller is configured to identify second information including a target time spent for discovering the second device according to a scanning period stored for the broadcasting period of each device, and to adjust the scanning period to a scanning period of a target time corresponding to the target time value among the second information.

19. A first device for reconnecting communication with a second device in short-range wireless communication, the first device comprising:

a controller configured to determine a scanning period of advertisement data broadcasted from the second device through communication with the second device, and when it is determined that link loss is generated at a link with the second device, to adjust the scanning period of the advertisement data broadcasted from the second device to the determined period; and

a short-range communication unit configured to scan the advertisement data at each of the adjusted scanning periods.

20. The first device of claim 19, further comprising a memory unit that, when link generation with the second device is performed, stores an error value generated while the link generation is identified,

wherein the controller configured to adjust the scanning period of the advertisement data by adding the error value to the adjusted scanning period.

21. The first device of claim 20, wherein the controller is configured to calculate an error probability generated when the advertisement data is scanned, as the error value is generated, and to adjust a size of a scan window in which the scanning is performed, by using the calculated error probability.

22. The first device of claim 20, wherein when an error value generated in time information of the first device is larger than an error value generated in external time information, the controller is configured to adjust the adjusted scanning period by adding the error value generated in the external time information.

23. A second device for reconnecting communication with a first device in short-range wireless communication, the second device comprising:

a short-range communication unit configured to receive an advertisement data transmission period request from the first device; and

a controller configured to transmit, to the first device, a period in which the second device transmits advertisement data, in response to the request.

24. A second device for reconnecting communication with a first device in short-range wireless communication, the second device comprising:

a controller configured to determine a transmission period of advertisement data broadcasted to the first device, through communication with the first device, and when it is determined that link loss is generated at a link with the first device, to adjust the transmission period of the advertisement data broadcasted to the first device to the determined period; and

a short-range communication unit configured to broadcast the advertisement data at each adjusted transmission period.

25. The second device of 24, further comprising a memory unit that, when link generation with the first device is performed, stores an error value generated while the link generation is identified,

wherein the controller is configured to adjust the transmission period of the advertisement data by adding the error value to the adjusted transmission period.

26. The second device of claim 25, wherein when an error value generated in time information of the second device is larger than an error value generated in external time information, the controller is configured to adjust the adjusted transmission period by adding the error value generated in the external time information thereto.