Multi-gateway system and methods for same

• US 20080063002A1
• Filed: 09/11/2007
• Published: 03/13/2008
• Est. Priority Date: 09/11/2006
• Status: Abandoned Application

• Current Assignee: Syntek International Holding Ltd. (Syntek Semiconductor Co., Ltd.)
• Original Assignee: 3DSP Corporation
• Inventors: Zheng, Hong Helena, Chen, Quang, Jiang, Chungjun, Tai, Jack Han-Chin, Lu, Hui, Lu, Kan
• Application Number:
  US11/900,158
• Publication Number:
  US 20080063002A1
• Time in Patent Office: Days
• US Class Current: 370/401
• CPC Class Codes: H04W 8/26 Network addressing or numbering for mobility support
• CPC Class Codes: H04W 80/04 Network layer protocols, e.g. mobile IP [Internet Protocol]
• CPC Class Codes: H04W 84/10 Small scale networks; Flat hierarchical networks
• CPC Class Codes: H04W 88/16 Gateway arrangements

Abstract

A multi-gateway system is disclosed. The multi-gate system may include an access point associated with a zone, the access point providing a network coverage within the zone; a wireless client adapted to communicate with the access point when the wireless client is in the zone; and a virtual central processing device associated with a virtual media access control (MAC) address, wherein the virtual central processing device communicates with the access point to redirect a data packet between the wireless client and a destination.

Claims

1. A multi-gateway system, said system comprising:

an access point associated with a zone, said access point providing a network coverage within said zone;

a wireless client adapted to communicate with said access point when said wireless client is in said zone; and

a virtual central processing device associated with a virtual media access control (MAC) address, wherein said virtual central processing device communicates with said access point to redirect a data packet between said wireless client and a destination.

2. The system of claim 1, wherein said access point further comprises a first access point and a second access point, said first and second access points are associated with a first zone and a second zone, respectively, said first zone may overlap said second zone.

3. The system of claim 2, wherein said virtual central processing device comprises a plurality of gateway processors, said plurality of gateway processors forwards said data packet between said wireless client and said destination based on a mapping between said wireless client and one of said first and second access points.

4. The system of claim 3, wherein said plurality of gateway processors is mapped to said virtual MAC address.

5. The system of claim 2, wherein said wireless client is assigned with said virtual processing device such that when said wireless client moves between said first zone and said second zone, said wireless client selectively communicates with said first or second access point, and said same virtual processing device is used to redirect said data packets.

6. The system of claim 2, wherein a respective operating condition of said first and second access points is used to determine which access point said wireless client is to communicate with.

7. The system of claim 1, wherein said data packet is encapsulated with a first header information so as to provide routing information.

8. The system of claim 1, wherein said wireless client encapsulates said data packet with a second additional header so as to provide packet re-sequencing information to said virtual central processing device.

9. The system of claim 1, wherein said virtual central processing device further comprises a router to gather routing information from said access point.

10. The system of claim 9, wherein said wireless client sends out hello messages periodically to indicate said zone said wireless client belongs, thereby updating said gathered routing information.

11. The system of claim 10, wherein at least two timing parameters are associated with said hello messages, one of said at least two timing parameters is related to re-association, the other one of said at least two timing parameters is related to loss of IP address.

12. The system of claim 10, wherein access point further aggregates said hello messages into a periodic message to update said gathered routing information.

13. The system of claim 9, wherein said router provides said gathered information to said virtual central processing device to help said virtual central processing device redirect said data packet dynamically.

14. The system of claim 1, wherein said access point establishes a gradient table to said virtual MAC address so as to establish a connection status of said wireless client.

15. The system of claim 9, wherein said router assigns a cost to said virtual MAC address to said access point.

16. The system of claim 1, wherein said virtual central processing device further comprises a dynamic host configuration protocol (DHCP) server assigning an IP address to said wireless client.

17. The system of claim 1, wherein said wireless client provides a local DHCP function to assign local IP addresses to devices connected thereto.

18. The system of claim 1, wherein said access point assigns a special port thereof to receive said data packet.

19. The system of claim 1, wherein said wireless client connects to said access point through a hopping mechanism.

20. The system of claim 1, wherein said wireless client connects to said access point through a wireless routing mechanism.

21. The system of claim 1, wherein an asymmetric tunneling mechanism is implemented between said wireless client and said virtual central processing device.

22. The system of claim 1, wherein said wireless client increases a transmit power until a minimum set of close neighbors for reaching said access point is obtained.

23. A multi-gateway system, comprising:

an access point associated with a zone, said access point providing a network coverage within said zone;

a wireless client adapted to communicate with said access point when said wireless client is in said zone; and

means for redirecting a data packet between said wireless client and a destination,

wherein said access point communicating with said means for redirecting a data packet between said wireless client and a destinations through a virtual media access control (MAC) address.

24. The system of claim 23, wherein said access point further comprises a first access point and a second access point, said first and second access points are associated with a first zone and a second zone, respectively, said first zone may overlap said second zone.

25. The system of claim 24, wherein said wireless client is assigned with said means for redirecting a data packet between said wireless client and a destination and said virtual MAC address such that when said wireless client moves between said first zone and said second zone, said wireless client selectively communicates with said first or second access point, and said same said means for redirecting a data packet between said wireless client and a destination is used to redirect said data packets.

26. The system of claim 24, wherein a respective operating condition of said first and second access points is used to determine which access point said wireless client is to communicate with.

27. The system of claim 23, wherein said data packet is encapsulated with a first header information so as to provide routing information.

28. The system of claim 23, wherein said wireless client encapsulates said data packet with a second additional header so as to provide packet re-sequencing information to said means for redirecting a data packet between said wireless client and a destination.

29. The system of claim 23, wherein said means for redirecting a data packet between said wireless client and a destination further comprising routing means for gathering routing information from said access point.

30. The system of claim 29, wherein said wireless client sends out hello messages periodically to indicate said zone said wireless client belongs thereby updating said gathered routing information.

31. The system of claim 30, wherein at least two timing parameters are associated with said hello messages, one of said at least two timing parameters is related to re-association, the other one of said at least two timing parameters is related to loss of IP address.

32. The system of claim 31, wherein said access point further aggregates said hello messages into a periodic message to update said gathered routing information.

33. The system of claim 29, wherein said routing means provides said gathered routing information to said means for redirecting a data packet between said wireless client and a destination to help said means for redirecting a data packet between said wireless client and a destination redirect said data packet dynamically.

34. The system of claim 23, wherein said access point establishes a gradient table to said virtual MAC so as to establish a connection status of said wireless client.

35. The system of claim 29, wherein routing means assigns a cost to said virtual MAC address to said access point.

36. The system of claim 23, wherein said means for redirecting a data packet between said wireless client and a destination further comprises means for assigning an IP address to said wireless client.

37. The system of claim 23, wherein said wireless client provides a local dynamic host configuration protocol (DHCP) function to assign local IP addresses to devices connected thereto.

38. The system of claim 23, wherein said access point assigns a special port thereof to receive said data packet.

39. The system of claim 23, wherein said wireless client connects to said access point through a hopping mechanism.

40. The system of claim 23, wherein said wireless client connects to said access point through a wireless routing mechanism.

41. The system of claim 23, wherein an asymmetric tunneling mechanism is implemented between said wireless client and said means for redirecting a data packet between said wireless client and a destination.

42. The system of claim 24, wherein said means for redirecting a data packet between said wireless client and a destination further comprising a plurality of processing means, said plurality of processing means forwarding said data packet between said wireless client and said destination based on a mapping between said wireless client and one of said first and second access points.

43. The system of claim 23, wherein said wireless client increases a transmit power until a minimum set of close neighbors for reaching said access point is obtained.

44. A data routing method adapted in a multi-gateway system, said multi-gateway system comprising a wireless client, an access point and a virtual central processing device said access point associated with a zone, said method comprising at least the following steps:

assigning said virtual central processing device to said wireless client, said virtual central processing device associated with a virtual media access control (MAC) address;

identifying said access point to communicate with, said access point associated with a zone said wireless client is in; and

communicating with said virtual central processing device by said access point to redirect a data packet between said wireless client and a destination.

45. The method of claim 44, wherein said access point further comprises a first access point and a second access point, said first and second access points are associated with a first zone and a second zone, respectively, said first zone may overlap said second zone.

46. The method of claim 45, further comprising forwarding said data packet between said wireless client and said destination based on a mapping between said wireless client and one of said first and second access points.

47. The method of claim 45, further comprising selectively communicating between said first and second access points based on a respective operating condition of said first and second access point.

48. The method of claim 44, further comprising encapsulating said data packet with a first header information so as to provide routing information.

49. The method of claim 44, further comprising encapsulating said data packet with a second additional header so as to provide packet re-sequencing information to said virtual central processing device.

50. The method of claim 44, further comprising gathering routing information from said access point.

51. The method of claim 50, further comprising sending out hello messages periodically so as to indicate said zone said wireless client belongs, thereby updating said gathered routing information.

52. The method of claim 50, wherein at least two timing parameters are associated with said hello messages, one of said at least two timing parameters is related to re-association, the other one of said at least two timing parameters is related to loss of IP address.

53. The method of claim 51, further comprising aggregating said hello messages into a periodic message to update said gathered routing information.

54. The method of claim 50, further comprising providing said gathered information to said virtual central processing device to help redirect said data packet dynamically.

55. The method of claim 44, further comprising establishing a gradient table to said virtual MAC address so as to establish a connection status of said wireless client.

56. The method of claim 44, further comprising assigning a cost to said virtual MAC address to said access point.

57. The method of claim 44, further comprising assigning an IP address to said wireless client.

58. The method of claim 44, further comprising assigning a local IP address to devices connected to said wireless client.

59. The method of claim 44, further comprising assigning a special port to said access point to receive said data packet.

60. The method of claim 44, further comprising utilizing a hopping mechanism to connect said wireless client and said access point.

61. The method of claim 44, further comprising utilizing a hopping mechanism to connect said wireless client and said access point.

62. The method of claim 44, further comprising implementing an asymmetric tunneling between said wireless client and said virtual central processing device.

63. The system of claim 44, further comprising increases a transmit power of said wireless client until a minimum set of close neighbors for reaching said access point is obtained.

64. An electronic device, comprising:

a wireless client adapted to communicate with an access point when said electronic device is in a zone associated with said access point, wherein said wireless client is assigned with a virtual central processing device associated with a virtual media access control (MAC) access such that said virtual central processing device communicates with said access point to redirect a data packet between said wireless client and a destination.

65. The electronic device of claim 64, wherein said access point comprises a first access point and a second access point such that when said wireless client moves between said first zone and said second zone, said wireless client selectively communicates with said first or second access point, and said same virtual processing device is used to redirect said data packets.

66. The electronic device of claim 65, wherein a respective operating condition of said first and second access points is used to determine which access point said wireless client is to communicate with.

67. The electronic device of claim 64, wherein said wireless client encapsulates said data packet with a first header information so as to provide routing information.

68. The electronic device of claim 64, wherein said wireless client encapsulates said data packet with a second header information so as to provide packet re-sequencing information to said virtual central processing device.

69. The electronic device of claim 64, wherein said wireless clients sends out hello messages periodically to indicate said zone said wireless client belongs, thereby updating a gathered routing information.

70. The electronic device of claim 69, wherein at least two timing parameters are associated with said hello messages, one of said at least two timing parameters is related to re-association, the other one of said at least two timing parameters is related to loss of IP address.

71. The electronic device of claim 64, wherein said wireless client provides a local DHCP function to assign local IP addresses to devices connected to said electronic device.

72. The electronic device of claim 64, wherein said wireless client connects to said access point through a hopping mechanism.

73. The electronic device of claim 64, wherein said wireless client connects to said access point through a wireless routing mechanism.

74. The electronic device of claim 64, wherein an asymmetric tunneling mechanism is implemented between said wireless client and said virtual central processing device.

75. The electronic device of claim 64, wherein said wireless client increases a transmit power until a minimum set of close neighbors for reaching said access point is obtained.