METHOD OF PERFORMING PAIRING BETWEEN COORDINATOR AND DEVICE IN NETWORK, METHOD OF PERFORMING PAIRING BETWEEN DEVICES, METHOD OF PAIRING BETWEEN COORDINATORS AND NETWORK SYSTEM INCLUDING THE COORDINATORS AND THE DEVICES

• US 20110276665A1
• Filed: 05/06/2011
• Published: 11/10/2011
• Est. Priority Date: 05/07/2010
• Status: Active Grant

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: KWON, Hyuk-choon, KIM, Ho-dong, JUN, Hae-young, JUNG, Soo-yeon
• Granted Patent: US 9,635,693 B2
• Time in Patent Office: Days
• US Class Current: 709/220
• CPC Class Codes: H04L 12/4633 Interconnection of networks using encapsulation techniques, e.g. tunneling
• CPC Class Codes: H04L 65/1069 Session establishment or de-establishment
• CPC Class Codes: H04W 76/14 Direct-mode setup
• CPC Class Codes: H04W 76/19 Connection re-establishment
• CPC Class Codes: H04W 76/20 Manipulation of established connections
• CPC Class Codes: H04W 8/005 Discovery of network devices, e.g. terminals
• CPC Class Codes: H04W 84/18 Self-organising networks, e.g. ad-hoc networks or sensor networks

Abstract

Provided are methods and apparatuses for performing pairing. A method of performing pairing between a coordinator and a peer device includes: if a second coordinator of a second network relays first pairing information indicating that a first coordinator of a first network is a device to perform pairing, from the first coordinator to a peer device of the second network, disassociating, by the peer device, from the second network, associating with the first network, and then transmitting, to the first coordinator, the first pairing information and second pairing information indicating that the peer device is a peer device to perform pairing.

Claims

1. A method of performing pairing between a first coordinator of a first network and a peer device of a second network, the method comprising:

relaying, by a second coordinator of the second network, first pairing information indicating that the first coordinator is a device to perform pairing, from the first coordinator to the peer device;

disassociating, by the peer device, from the second network;

associating, by the peer device, with the first network; and

transmitting, by the peer device and to the first coordinator, the first pairing information, and second pairing information indicating that the peer device is a peer device to perform pairing.

2. The method of claim 1, wherein the relaying the first pairing information comprises:

broadcasting, by the first coordinator, the first pairing information; and

broadcasting, by the second coordinator that receives the first pairing information, the first pairing information,

wherein the peer device does not receive the first pairing information broadcasted by the first coordinator, and receives the first pairing information broadcasted by the second coordinator.

3. The method of claim 1, wherein the disassociating the peer device from the second network comprises:

transmitting, by the peer device and to the second network, a disassociation request to disassociate from the second network; and

transmitting, by the second coordinator and to the peer device, a disassociation response that approves the disassociation request.

4. The method of claim 1, wherein the associating the peer device with the first network comprises:

transmitting, by the peer device and to the first coordinator, an association request to associate with the first network; and

transmitting, by the first coordinator and to the peer device, an association response that approves the association request.

5. The method of claim 1, wherein:

the first pairing information comprises at least one of first Push Button Configuration (PBC) information indicating that a button for instructing to perform pairing has been pushed in the first coordinator, and a media access control (MAC) address of the first coordinator; and

the second pairing information comprises at least one of second PBC information indicating that a button for instructing to perform pairing has been pushed in the peer device, and an MAC address of the peer device.

6. The method of claim 5, wherein the first pairing information further comprises at least one of an identifier of the first network and coordinator role information indicating that the first coordinator is a coordinator of the first network.

85. A computer-readable recording medium having recorded thereon a computer program for executing the method of claim 1.

7. A method of performing pairing between a first coordinator of a first network and a peer device of a second network, the method comprising:

relaying, by a second coordinator of the second network, first pairing information indicating that the first coordinator is a device to perform pairing, from the first coordinator to the peer device;

relaying, by the second coordinator, the first pairing information, and second pairing information indicating that the peer device is a peer device to perform pairing, from the peer device to the first coordinator;

disassociating, by the peer device, from the second network; and

associating, by the peer device, with the first network.

8. The method of claim 7, wherein the relaying the first pairing information comprises:

broadcasting, by the first coordinator, the first pairing information; and

broadcasting, by the second coordinator that receives the first pairing information, the first pairing information,

wherein the peer device does not receive the first pairing information broadcasted by the first coordinator, and receives the first pairing information broadcasted by the second coordinator.

9. The method of claim 7, wherein the relaying the first pairing information and the second pairing information comprises:

transmitting, by the peer device and to the second coordinator, the first pairing information and the second pairing information; and

transmitting, by the second coordinator and to the first coordinator, the first pairing information and the second pairing information.

10. A method of performing pairing between a first coordinator of a first network and a peer device of a second network, the method comprising:

broadcasting first pairing information indicating that the first coordinator is a device to perform pairing;

disassociating, by the peer device, from the second network;

associating, by the peer device, with the first network; and

transmitting, by the peer device and to the first coordinator, the first pairing information, and second pairing information indicating that the peer device is a peer device to perform pairing.

11. The method of claim 10, wherein:

the second network further comprises a second coordinator;

if the peer device does not receive any message from the first coordinator or the second coordinator within a predetermined amount of time, the peer device transmits a failure message to the second coordinator; and

if the failure message is received, the second coordinator transmits the failure message to the first coordinator.

12. A method of performing pairing between a first coordinator of a first network and a peer device of a second network, the method comprising:

relaying, by a second coordinator of the second network, second pairing information indicating that the peer device is a device to perform pairing, from the peer device to the first coordinator;

relaying, by the second coordinator, the second pairing information, and first pairing information indicating that the first coordinator is a peer device to perform pairing, from the first coordinator to the peer device;

disassociating, by the peer device, from the second network; and

associating, by the peer device, with the first network.

13. The method of claim 12, wherein the relaying the second pairing information from the peer device to the first coordinator comprises:

transmitting, by the peer device and to the second coordinator, the second pairing information; and

transmitting, by the second coordinator and to the first coordinator, the second pairing information.

14. The method of claim 12, wherein the relaying the first pairing information and the second pairing information from the first coordinator to the peer device comprises:

broadcasting, by the first coordinator, the first pairing information and the second pairing information; and

broadcasting, by the second coordinator that receives the first pairing information and the second pairing information, the first pairing information and the second pairing information,

wherein the peer device does not receive the first pairing information and the second pairing information broadcasted by the first coordinator, and receives the first pairing information and the second pairing information broadcasted by the second coordinator.

15. A method of performing pairing between a first coordinator of a first network and a peer device of a second network, the method comprising:

broadcasting, by the first coordinator, first pairing information indicating that the first coordinator is a device to perform pairing;

relaying, by a second coordinator of the second network, the first pairing information, and second pairing information indicating that the peer device is a peer device to perform pairing, from the peer device to the first coordinator; and

associating, by the first coordinator, with the second network.

16. The method of claim 15, wherein the relaying the first pairing information and the second pairing information comprises:

transmitting, by the peer device and to the second coordinator, the first pairing information and the second pairing information; and

transmitting, by the second coordinator and to the first coordinator, the first pairing information and the second pairing information.

17. The method of claim 15, wherein the associating the first coordinator with the second network comprises:

transmitting, by the first coordinator and to the second coordinator, an association request to associate with the second network; and

transmitting, by the second coordinator and to the first coordinator, an association response that approves the association request.

18. The method of claim 15, further comprising:

transmitting, by the first coordinator and to at least one device that belongs to the first network, an exit message indicating that the first coordinator plans to exit the first network; and

disassociating, by the first coordinator, from the first network.

19. The method of claim 15, further comprising:

transmitting, by the first coordinator and to a device that belongs to the first network, a handover request to hand over a coordinator role of the first network;

transmitting, by a device that receives the handover request and to the first coordinator, a handover response that approves the handover request; and

disassociating, by the first coordinator, from the first network.

20. The method of claim 15, further comprising:

transmitting, by the first coordinator and to a device that belongs to the first network, a movement request to move to the second network;

transmitting, by a device of the first network that receives the movement request and to the first coordinator, a movement response that approves the movement request; and

associating, by the device that receives the movement request, with the second network.

21. A method of performing pairing between a first device of a first network and a second device of a second network, the method comprising:

relaying, by a first coordinator of the first network and a second coordinator of the second network, third pairing information indicating that the first device is a device to perform pairing, from the first device to the second device;

relaying, by the first coordinator and the second coordinator, second pairing information indicating that the second device is a peer device to perform pairing, from the second device to the first device;

disassociating, by the second device, from the second network; and

associating, by the second device, with the first network.

22. The method of claim 21, further comprising:

transmitting, by the second device that associates with the first network and to the first coordinator, the second pairing information; and

broadcasting, by the first coordinator, the second pairing information and the third pairing information.

23. The method of claim 21, wherein the relaying the third pairing information to the second device comprises:

transmitting, by the first device and to the first coordinator, the third pairing information;

broadcasting, by the first coordinator, the third pairing information; and

transmitting, by the second coordinator that receives the third pairing information and to the second device, the third pairing information,

wherein the second device does not receive the third pairing information broadcasted by the first coordinator, and receives the third pairing information broadcasted by the second coordinator.

24. The method of claim 21, wherein the relaying the second pairing information to the first device comprises:

transmitting, by the second device and to the second coordinator, the second pairing information;

broadcasting, by the second coordinator, the second pairing information; and

transmitting, by the first coordinator that receives the second pairing information and to the first device, the second pairing information,

wherein the first device does not receive the second pairing information broadcasted by the second coordinator, and receives the second pairing information broadcasted by the first coordinator.

25. The method of claim 21, wherein:

the second pairing information comprises at least one of second Push Button Configuration (PBC) information indicating that a button for instructing to perform pairing has been pushed in the second device, and a media access control (MAC) address of the second device; and

the third pairing information comprises at least one of third PBC information indicating that a button for instructing to perform pairing has been pushed in the first device, and an MAC address of the first device.

26. A method of performing pairing between a first device of a first network and a second device of a second network, the method comprising:

comparing, by each of a first coordinator of the first network and a second coordinator of the second network, a capability of the first coordinator and a capability of the second coordinator based on first coordinator capability information indicating the capability of the first coordinator and second coordinator capability information indicating the capability of the second coordinator;

disassociating, by the second device, from the second network associating with the first network based on a result of the comparing and;

transmitting, by the second device and to the first coordinator, second pairing information indicating that the second device is a device to perform pairing; and

broadcasting, by the first coordinator, third pairing information indicating that the first device is a device to perform pairing and the second pairing information.

27. The method of claim 26, wherein the comparing the capability of the first coordinator and the capability of the second coordinator comprises:

transmitting, by the first device and to the first coordinator, the third pairing information;

transmitting, by the second device and to the second coordinator, the second pairing information;

broadcasting, by the first coordinator, the third pairing information and the first coordinator capability information; and

broadcasting, by the second coordinator, the second pairing information and the second coordinator capability information.

28. The method of claim 26, wherein the disassociating the second device from the second network and the associating the second device with the first network based on the result of the comparing comprises:

deciding, by each of the first coordinator and the second coordinator, the first coordinator as a selected coordinator that is a coordinator having better coordinator capability between the first coordinator and the second coordinator based on the result of the comparing;

transmitting, by the first coordinator and to the first device, network information about the first network to which the selected coordinator belongs, and the second pairing information;

transmitting, by the second coordinator and to the second device, network information about the first network and the third pairing information;

disassociating, by the second device, from the second network; and

associating, by the second device, with the first network based on the network information about the first network.

29. The method of claim 28, wherein the deciding the first coordinator as the selected coordinator is performed based on at least one of a maximum number of devices that are controllable by each of the first and second coordinators, a number of devices that are being controlled by the first and second coordinators, and information regarding whether power is supplied to each of the first and second coordinators by using a battery.

30. The method of claim 28, wherein the transmitting the network information about the first network and the third pairing information to the second device comprises transmitting, to the second device, a movement request that comprises the network information about the first network and the third pairing information to request the second device to move to the first network.

31. A method of performing pairing between a first device of a first network and a second device of a second network by using a first coordinator of the first network and a second coordinator of the second network, the method comprising:

comparing, by each of the first device and the second device, a capability of the first coordinator and a capability of the second coordinator based on first coordinator capability information indicating the capability of the first coordinator and second coordinator capability information indicating the capability of the second coordinator;

disassociating, by the second device, from the second network associating with the first network based on a result of the comparing;

transmitting, by the second device and to the first coordinator, second pairing information indicating that the second device is a device to perform pairing; and

broadcasting, by the first coordinator, third pairing information indicating that the first device is a device to perform pairing and the second pairing information.

32. The method of claim 31, wherein the comparing the capability of the first coordinator and the capability of the second coordinator comprises:

transmitting, by the first device and to the first coordinator, the third pairing information;

transmitting, by the second device and to the second coordinator, the second pairing information;

broadcasting, by the first coordinator, the third pairing information and the first coordinator capability information;

broadcasting, by the second coordinator, the second pairing information and the second coordinator capability information;

broadcasting, by the first coordinator, the second pairing information and the second coordinator capability information; and

broadcasting, by the second coordinator, the third pairing information and the first coordinator capability information.

33. The method of claim 31, wherein the disassociating the second device from the second network and the associating the second device with the first network based on the result of the comparing comprises:

deciding, by each of the first device and the second device, the first coordinator as a selected coordinator that is a coordinator having a better coordinator capability between the first coordinator and the second coordinator based on the result of the comparing;

disassociating, by the second device, from the second network; and

associating, by the second device, with the first network to which the selected coordinator belongs.

34. A method of performing pairing between a first device of a first network and a second device of a second network, the method comprising:

comparing, by each of a first coordinator of the first network and a second coordinator of the second network, a first random number generated by the first device and a second random number generated by the second device;

disassociating, by the second device, from the second network and associating with the first network based on a result of the comparing;

transmitting, by the second device and to the first coordinator, second pairing information indicating that the second device is a device to perform pairing; and

broadcasting, by the first coordinator, third pairing information indicating that the first device is a device to perform pairing and the second pairing information.

35. The method of claim 34, wherein the comparing the first random number and the second random number comprises:

transmitting, by the first device and to the first coordinator, the first random number and the third pairing information after generating the first random number;

transmitting, by the second device and to the second coordinator, the second random number and the second pairing information after generating the second random number;

broadcasting, by the first coordinator, the third pairing information and the first random number; and

broadcasting, by the second coordinator, the second pairing information and the second random number.

36. The method of claim 34, wherein the disassociating the second device from the second network the associating the second device with the first network based on the result of the comparing comprises:

deciding, by each of the first coordinator and the second coordinator, the first network as a selected network based on the result of the comparing;

transmitting, by the first coordinator and to the first device, network information about the first network and the second pairing information;

transmitting, by the second coordinator and to the second device, network information about the first network and the third pairing information;

disassociating, by the second device, from the second network; and

associating, by the second device, with the first network based on the network information about the first network.

37. A method of performing pairing between a first device of a first network and a second device of a second network by using a first coordinator of the first network and a second coordinator of the second network, the method comprising:

comparing, by each of the first device and the second device, a first random number generated by the first device and a second random number generated by the second device;

disassociating, by the second device from the second network and associating with the first network, based on a result of the comparing;

transmitting, by the second device and to the first coordinator, second pairing information indicating that the second device is a device to perform pairing, and the second random number; and

broadcasting, by the first coordinator, third pairing information indicating that the first device is a device to perform pairing, the second pairing information, the first random number, and the second random number.

38. The method of claim 37, wherein the comparing the first random number and the second random number comprises:

transmitting, by the first device and to the first coordinator, the first random number and the third pairing information after generating the first random number;

transmitting, by the second device and to the second coordinator, the second random number and the second pairing information after generating the second random number;

broadcasting, by the first coordinator, the third pairing information and the first random number;

broadcasting, by the second coordinator, the second pairing information and the second random number;

broadcasting, by the first coordinator, the second pairing information and the second random number; and

broadcasting, by the second coordinator, the third pairing information and the first random number.

39. A method of performing pairing between a first coordinator of a first network and a second coordinator of a second network, the method comprising:

broadcasting, by the second coordinator, fourth pairing information indicating that the second coordinator is a device to perform pairing;

broadcasting, by the first coordinator, first pairing information indicating that the first coordinator is a device to perform pairing;

deciding a device, between the first coordinator and the second coordinator, to exit a network to which the first coordinator or the second coordinator belongs; and

disassociating, by the second coordinator, from the second network and associating with the first network based on the deciding.

40. The method of claim 39, wherein the disassociating the second coordinator from the second network and the associating the second coordinator with the first network based on the deciding comprises:

transmitting, by the second coordinator and to a device of the second network, a handover request to hand over coordinator role of the second coordinator to another device;

transmitting, by the device of the second network that receives the handover request and to the second coordinator, a handover response that approves the handover request; and

becoming, by the device of the second network that transmits the handover response, a coordinator of the second network.

41. The method of claim 39, further comprising:

transmitting, by the second coordinator and to a device of the second network, a movement request to move to the first network; and

associating, by the device of the second device that receives the movement request, with the first network.

42. The method of claim 39, further comprising:

transmitting, by the second coordinator to devices that belong to the second network, an exit message indicating that the second coordinator plans to exit the second network; and

associating, by at least one of the devices of the second network that receives the exit message, with the first network.

43. A network system comprising:

a first coordinator which belongs to a first network and broadcasts first pairing information indicating that the first coordinator is a device to perform pairing;

a peer device which belongs to a second network and generates second pairing information indicating that the peer device is a peer device to perform pairing; and

a second coordinator which belongs to the second network and relays the first pairing information from the first coordinator to the peer device,

wherein, if the first pairing information is received, the peer device disassociates from the second network, associates with the first network and then transmits the first pairing information and the second pairing information to the first coordinator.

44. The network system of claim 43, wherein:

the relaying the first pairing information by the second coordinator is performed when the second coordinator receives the first pairing information from the first coordinator and then broadcasts the first pairing information; and

the peer device does not receive the first pairing information broadcasted by the first coordinator, and receives the first pairing information broadcasted by the second coordinator.

45. The network system of claim 43, wherein the disassociating the peer device from the second network is performed when the peer device transmits, to the second coordinator, a disassociation request to disassociate from the second network and receives, from the second coordinator, a disassociation response that approves the disassociation request.

46. The network system of claim 43, wherein the associating the peer device with the first network is performed when the peer device transmits, to the first coordinator, an association request to associate with the first network and receives, from the first coordinator, an association response that approves the association request.

47. The network system of claim 43, wherein:

the first pairing information comprises at least one of first Push Button Configuration (PBC) information indicating that a button for instructing to perform pairing has been pushed in the first coordinator, and a media access control (MAC) address of the first coordinator; and

the second pairing information comprises at least one of second PBC information indicating that a button for instructing to perform pairing has been pushed in the peer device, and an MAC address of the peer device.

48. The network system of claim 47, wherein the first pairing information further comprises at least one of an identifier of the first network and coordinator role information indicating that the first coordinator is a coordinator of the first network.

49. A network system comprising:

a first coordinator which belongs to a first network and broadcasts first pairing information indicating that the first coordinator is a device to perform pairing;

a peer device which belongs to a second network and generates second pairing information indicating that the peer device is a peer device to perform pairing; and

a second coordinator which belongs to the second network and relays the first pairing information from the first coordinator to the peer device and relays the first pairing information and the second pairing information from the peer device to the first coordinator,

wherein the peer device transmits, to the second coordinator and to the second coordinator, the first pairing information and the second pairing information and then disassociates from the second network and associates with the first network.

50. The network system of claim 49, wherein:

the relaying the first pairing information to the peer device by the second coordinator is performed when the second coordinator receives the first pairing information from the first coordinator and then broadcasts the first pairing information; and

the peer device does not receive the first pairing information broadcasted by the first coordinator. and receives the beacon comprising the first pairing information or the first pairing information broadcasted by the second coordinator.

51. The network system of claim 49, wherein the relaying the first pairing information and the second pairing information to the first coordinator by the second coordinator is performed when the second coordinator receives, from the peer device, the first pairing information and the second pairing information transmits, to the first coordinator, the first pairing information and the second pairing information.

52. A network system comprising:

a first coordinator which belongs to a first network and broadcasts first pairing information indicating that the first coordinator is a device to perform pairing; and

a peer device which belongs to a second network and, if the first pairing information is received, which disassociates from the second network and associates with the first network and then transmits, to the first coordinator, the first pairing information and second pairing information indicating that the peer device is a peer device to perform pairing.

53. The network system of claim 52, wherein:

the second network further comprises a second coordinator;

if the peer device does not receive any message from the first coordinator or the second coordinator within a predetermined amount of time, the peer device transmits a failure message to the second coordinator; and

if the failure message is received, the second coordinator transmits the failure message to the first coordinator.

54. A network system comprising:

a peer device which belongs to a second network and generates second pairing information indicating that the peer device is a device to perform pairing;

a second coordinator which belongs to the second network and relays the second pairing information from the peer device to a first coordinator of a first network; and

a first coordinator which broadcasts the second pairing information and first pairing information indicating that the first coordinator is a peer device to perform pairing,

wherein the second coordinator relays the first pairing information and the second pairing information from the first coordinator to the peer device, and if the peer device receives, from the second coordinator, the first pairing information and the second pairing information, the peer device disassociates from the second network and associates with the first network.

55. The network system of claim 54, wherein the relaying the second pairing information to the first coordinator by the second coordinator is performed when the second coordinator receives, from the peer device, the second pairing information and then transmits, to the first coordinator, the second pairing information.

56. The network system of claim 54, wherein:

the relaying the first pairing information and the second pairing information from the first coordinator to the peer device by the second coordinator is performed when the second coordinator receives, from the first coordinator, the first pairing information and the second pairing information and then broadcasts the first pairing information and the second pairing information; and

the peer device does not receive the first pairing information and the second pairing information broadcasted by the first coordinator, and receives the first pairing information and the second pairing information broadcasted by the second coordinator.

57. A network system comprising:

a first coordinator which belongs to a first network and broadcasts first pairing information indicating that the first coordinator is a device to perform pairing;

a peer device which belongs to a second network and generates second pairing information indicating that the peer device is a peer device to perform pairing; and

a second coordinator which belongs to the second network and relays the first pairing information and the second pairing information from the peer device to the first coordinator,

wherein, if the first pairing information and the second pairing information are received, the first coordinator associates with the second network.

58. The network system of claim 57, wherein the relaying the first pairing information and the second pairing information to the first coordinator by the second coordinator is performed when the second coordinator receives, from the peer device, the first pairing information and the second pairing information and then transmits, to the first coordinator, the first pairing information and the second pairing information.

59. The network system of claim 57, wherein the associating the first coordinator with the second network is performed when the first coordinator transmits, to the second coordinator, an association request to associate with the second network, and receives, from the second coordinator, an association response that approves the association request.

60. The network system of claim 57, wherein the associating the first coordinator with the second network is performed when, if the first pairing information and the second pairing information are received, the first coordinator transmits, to at least one device that belongs to the first network, an exit message indicating that the first coordinator plans to exit the first network, disassociates from the first network, and then associates with the second network.

61. The network system of claim 57, wherein the associating the first coordinator with the second network is performed when, if the first pairing information and the second pairing information are received, the first coordinator transmits, to a device of the first network, a handover request to hand over a coordinator role of the first network, receives, from the device of the first network, a handover response that approves the handover request, disassociates from the first network, and then associates with the second network.

62. The network system of claim 57, wherein the associating the first coordinator with the second network is performed when, if the first pairing information and the second pairing information are received, the first coordinator transmits, to a device of the first network, a movement request to move to the second network, receives, from the device of the first network, a movement response that approves the movement request, and then associates with the second network.

63. A network system comprising:

a first device which belongs to a first network and generates third pairing information indicating that the first device is a device to perform pairing;

a first coordinator which belongs to the first network and relays the third pairing information from the first device to a second device of a second network through a second coordinator of the second network;

a second device which generates second pairing information indicating that the second device is a peer device to perform pairing; and

a second coordinator which relays the second pairing information from the second device to the first device through the first coordinator,

wherein, if the third pairing information is received, the second device disassociates from the second network and then associates with the first network.

64. The network system of claim 63, wherein the second device further transmits, to the first coordinator, the second pairing information after associating with the first network, and the first coordinator further broadcasts the second pairing information and the third pairing information.

65. The network system of claim 63, wherein:

the relaying the third pairing information to the second device through the second coordinator by the first coordinator is performed when the first coordinator broadcasts the third pairing information and the second coordinator that receives the third pairing information transmits, to the second device, the third pairing information; and

the second device does not receive the third pairing information broadcasted by the first coordinator, and receives the third pairing information broadcasted by the second coordinator.

66. The network system of claim 63, wherein:

the relaying the second pairing information to the first device through the first coordinator by the second coordinator is performed when the second coordinator broadcasts the second pairing information and the first coordinator that receives the second pairing information transmits, to the first device, the second pairing information; and

the first device does not receive the second pairing information broadcasted by the second coordinator, and receives the second pairing information broadcasted by the first coordinator.

67. The network system of claim 63, wherein:

the second pairing information comprises at least one of second Push Button Configuration (PBC) information indicating that a button for instructing to perform pairing has been pushed in the second device, and a media access control (MAC) address of the second device; and

the third d pairing information comprises at least one of third PBC information indicating that a button for instructing to perform pairing has been pushed in the first device, and an MAC address of the first device.

68. A network system comprising:

a second coordinator which compares a capability of a first coordinator and a capability of the second coordinator based on first coordinator capability information indicating the capability of the first coordinator of a first network and second coordinator capability information indicating that the capability of the second coordinator that is a coordinator of a second network;

a second device which belongs to the second network, disassociates from the second network based on a result of the comparing, associates with the first network and then transmits, to the first coordinator, second pairing information indicating that the second device is a device to perform pairing;

a first device which belongs to the first network and generates third pairing information indicating that the first device is a peer device to perform pairing; and

a first coordinator which broadcasts the second pairing information and the third pairing information.

69. The network system of claim 68, wherein, before the second coordinator performs an operation of comparing the capability of the first coordinator and the capability of the second coordinator, the first coordinator broadcasts the third pairing information and the first coordinator capability information after receiving the third pairing information from the first device, and the second coordinator broadcasts the second pairing information and the second coordinator capability information after receiving the second pairing information from the second device.

70. The network system of claim 68, wherein the disassociating the second device from the second network based on the result of the comparing and the associating the second device with the first network is performed when the second coordinator decides the first coordinator as a selected coordinator that is a coordinator having a better coordinator capability between the first coordinator and the second coordinator based on the result of the comparing, the first coordinator transmits, to the first device, network information about the first network to which the selected coordinator belongs and the second pairing information, the second coordinator transmits, to the second device, network information about the first network and the third pairing information, and the second device disassociates from the second network and then associates with the first network based on the network information about the first network.

71. The network system of claim 70, wherein the deciding the first coordinator as the selected coordinator is performed based on at least one of a maximum number of devices that are controllable by each of the first and second coordinators, a number of devices that are being controlled by the first and second coordinators, and information regarding whether power is supplied to each of the first and second coordinators by using a battery.

72. The network system of claim 70, wherein the transmitting, by the second coordinator and to the second device, the network information about the first network and the third pairing information is performed by transmitting, to the second device, a movement request that comprises the network information about the first network and the third pairing information to request the second device to move to the first network.

73. A network system comprising:

a second device which compares a capability of a first coordinator and a capability of the second coordinator based on first coordinator capability information indicating the capability of the first coordinator of a first network and second coordinator capability information indicating that the capability of the second coordinator that is a coordinator of a second network, disassociates from the second network based on a result of the comparing, associates with the first network, and then transmits second pairing information indicating that the second device is a device to perform pairing;

a first device which belongs to the first network and generates third pairing information indicating that the first device is a device to perform pairing; and

a first coordinator which broadcasts the second pairing information and the third pairing information.

74. The network system of claim 73, wherein, before the second coordinator performs an operation of comparing the capability of the first coordinator and the capability of the second coordinator, the first device transmits, to the first coordinator, the third pairing information and obtains the second pairing information, the first coordinator capability information, and the second device transmits, to the second coordinator, the second pairing information and obtains the third pairing information, the first coordinator capability information, and the second coordinator capability information.

75. The network system of claim 73, wherein the disassociating the second device from the second network based on the result of the comparing and the associating the second device with the first network is performed when the second device decides the first coordinator as a selected coordinator that is a coordinator having a better coordinator capability between the first coordinator and the second coordinator based on the result of the comparing, disassociates from the second network, and associates with the first network to which the selected coordinator belongs.

76. A network system comprising:

a second coordinator which belongs to a second network and comparing a first random number generated by a first device that belongs to a first network and a second random number generated by a second device that belongs to the second network;

a second device which disassociates from the second network based on a result of the comparing, associates with the first network, and then transmits, to a first coordinator of the first network, second pairing information indicating that the second device is a device to perform pairing;

a first device which generates third pairing information indicating that the first device is a device to perform pairing; and

the first coordinator which broadcasts the second pairing information and the third pairing information.

77. The network system of claim 76, wherein, before the second coordinator performs an operation of comparing the first random number and the second random number, the first device transmits, to the first coordinator, the first random number and the third pairing information, and the second device transmits, to the second coordinator, the second random number and the second pairing information, and the first coordinator broadcasts the third pairing information and the first random number, and the second coordinator broadcasts the second pairing information and the second random number.

78. The network system of claim 76, wherein the disassociating the second device from the second network based on the result of the comparing and then the associating the second device with the first network is performed when the second device decides the first coordinator as a selected coordinator based on the result of the comparing, the first coordinator transmits, to the first device, network information about the first network and the second pairing information, the second coordinator transmits, to the second device, the network information about the first network and the third pairing information, and the second device disassociates from the second network and associates with the first network based on the network information about the first network.

79. A network system comprising:

a second device which belongs to a second network, compares a first random number generated by a first device that belongs to a first network and a second random number generated by the second device, disassociates from the second network based on a result of the comparing, associates with the first network, and then transmits, to a first coordinator of the first network, second pairing information indicating that the second device is a device to perform pairing and the second random number;

the first device which generates third pairing information indicating that the first device is a peer device to perform pairing; and

a first coordinator which broadcasts the second pairing information, the third pairing information, the first random number, and the second random number.

80. The network system of claim 79, wherein:

the second network further comprises a second coordinator; and

before the second device performs an operation of comparing the first random number and the second random number, the first device transmits, to the first coordinator, the first random number and the third pairing information and obtains the second pairing information and the second random number from the first coordinator, and the second device transmits, to the second coordinator, the second random number and the second pairing information and obtains the third pairing information and the first random number from the second coordinator.

81. A network system comprising:

a second coordinator which belongs to a second network and broadcasts fourth pairing information indicating that the second coordinator is a device to perform pairing; and

a first coordinator which broadcasts first pairing information indicating that the first coordinator is a device to perform pairing,

wherein each of the first coordinator and the second coordinator decides a device to exit a network to which the first coordinator or the second coordinator belong, and the second coordinator disassociates from the second network based on the deciding and then associates with the first network.

82. The network system of claim 81, wherein the associating the second coordinator with the first network is performed by transmitting, to a device of the second network, a handover request to hand over a coordinator role of the second coordinator to another device based on the deciding, receiving, from the device of the second network, a handover response that approves the handover request, disassociating the second coordinator from the second network, and then associating the second coordinator with the first network.

83. The network system of claim 81, wherein the associating the second coordinator with the first network is performed when the second coordinator transmits, to a device of the second network, a movement request to move to the first network and then associates with the first network, and the device of the second network associates with the first network if the movement request is received.

84. The network system of claim 81, wherein the associating the second coordinator with the first network is performed when the second coordinator transmits, to devices of the second network, an exit message indicating that the second coordinator plans to exit the second network, and then associates with the first network, and at least one of the devices of the second network associates with the first network if the exit message is received.