Wireless intelligent switch engine

• US 7,702,357 B2
• Filed: 03/11/2003
• Issued: 04/20/2010
• Est. Priority Date: 11/26/2002
• Status: Expired due to Fees

• Current Assignee: Sony Corporation (Sony Group Corp.), Sony Electronics Inc. (Sony Group Corp.)
• Original Assignee: Sony Corporation (Sony Group Corp.), Sony Electronics Inc. (Sony Group Corp.)
• Inventors: Yam, Eric
• Primary Examiner(s): Eng; George
• Assistant Examiner(s): Huynh; Nam
• Application Number:
  US10/387,362
• Publication Number:
  US 20040100923A1
• Time in Patent Office: 2,597 Days
• Field of Search: 370/328, 370/331, 370/332, 370/230, 370/338, 370/339, 455/560, 455/557, 455/558, 455436-437, 455/552.1, 455/432.1, 455/41.2, 709/217, 709/218, 709/227, 709/228
• US Class Current: 455/552.1
• CPC Class Codes: H04W 36/1446 wherein at least one of the networks is unlicensed
• CPC Class Codes: H04W 48/18 Selecting a network or a communication service
• CPC Class Codes: H04W 88/06 adapted for operation in multiple networks or having at least two operational modes, e.g. multi-mode terminals

Abstract

A wireless intelligent switch engine (WISE) is described. The wireless intelligent switch engine provides for automatic switching between different physical wireless interfaces in mobile devices while roaming to maintain a wireless network connection. WISE functions as a bridge between a mobile device and multiple wireless network interfaces to provide automatic and seamless switching among networks while roaming. The mobile device sees WISE as a LAN interface and communicates with WISE using the TCP/IP protocol stack, thus providing a PPP-less configuration that uses the TCP/IP protocol stack regardless of the wireless interface.

Claims

1. A network interface switching apparatus, comprising:

a protocol stack for a given interconnection model configured for operation within a wireless device;

a switch engine integrated into a data link layer of said protocol stack and configured to automatically select and establish a network connection session through one of a plurality of wireless network interface devices, an active interface device, associated with a mobile device while in response to said mobile device roaming among a plurality of wireless networks; and

a bridge formed within said switch engine between said mobile device and at least two associated wireless network interface devices of different types;

wherein said automatic selection is performed to allow said mobile device to provide seamless roaming between different types of wireless networks without closing and restarting the network connection session as established in a session layer above the data link layer;

wherein said switch engine provides power management to shut down, or to place into standby, the wireless network interface devices which it determines are not the active interface device thereby managing power consumption.

2. An apparatus as recited in claim 1:

wherein said switch engine is within layer 2, the data link layer, of the Open Systems Interconnection (OSI) reference model of said protocol stack;

wherein said protocol stack is for a TCP/IP protocol;

wherein said switch engine communicates with said mobile device using said TCP/IP protocol.

3. An apparatus as recited in claim 2, wherein said switch engine provides a PPP-less interface with said mobile device.

4. An apparatus as recited in claim 1, wherein said switch engine communicates with said wireless interface devices using a Ethernet OSI Layer 2 packet header with an IEEE 802.1p tag control information field having a priority field.

5. An apparatus as recited in claim 4, wherein the priority field is used to select a wireless interface based on a priority criteria selected from the group consisting essentially of frame quality, receive frame CRC error, and signal strength.

6. An apparatus as recited in claim 1, wherein said switch engine comprises a QoS priority queuing module, a VLAN bandwidth tagging module, a bridge switching module, and a switching/packet management table.

7. A network interface switching apparatus, comprising:

a protocol stack for a given interconnection model configured for operation within a wireless device;

a switch engine integrated into a data link layer of said protocol stack and configured as a bridge between a mobile device and at least two wireless network interface devices of different types associated with said mobile device;

wherein as said mobile device roams among a plurality of wireless networks and said switch engine automatically selects a corresponding wireless network interface device for seamless roaming between different types of wireless networks without closing and restarting the network connection session as established in a session layer above the data link layer;

wherein said switch engine provides power management to shut down, or to place into standby, the wireless network interface devices that are not being used to manage power consumption.

8. An apparatus as recited in claim 7

wherein said switch engine is within layer 2, the data link layer, of the Open Systems Interconnection (OSI) reference model of said protocol stack;

wherein said protocol stack is for a TCP/IP protocol;

wherein said switch engine communicates with said mobile device using TCP/IP protocol.

9. An apparatus as recited in claim 8, wherein said switch engine provides a PPP-less interface with said mobile device.

10. An apparatus as recited in claim 7, wherein said switch engine communicates with said wireless interface devices using a Ethernet OSI Layer 2 packet header with an IEEE 802.1p tag control information field having a priority field.

11. An apparatus as recited in claim 10, wherein the priority field is used to select a wireless interface based on a priority criteria selected from the group consisting essentially of frame quality, receive frame CRC error, and signal strength.

12. An apparatus as recited in claim 7, wherein said switch engine comprises a QoS priority queuing module, a VLAN bandwidth tagging module, a bridge switching module, and a switching/packet management table.

13. A network interface switching apparatus, comprising:

a protocol stack for a given interconnection model configured for operation within a wireless device;

a switch engine integrated into a data link layer of said protocol stack;

said switch engine including means for automatically selecting a corresponding one of at least two wireless network interface devices associated with said mobile device for seamless roaming among a plurality of wireless networks of at least two different types without closing and restarting the network connection session as established in a session layer above the data link layer;

wherein said means for selecting provides power management to shut down, or to place into standby, the wireless network interface devices that are not being used to manage power consumption.

14. An apparatus as recited in claim 13

wherein said switch engine is within layer 2, the data link layer, of the Open Systems Interconnection (OSI) reference model of said protocol stack;

wherein said protocol stack is for a TCP/IP protocol;

wherein said switch engine communicates with said mobile device using TCP/IP protocol.

15. An apparatus as recited in claim 14, wherein said switch engine provides a PPP-less interface with said mobile device.

16. An apparatus as recited in claim 13, wherein said switch engine communicates with said wireless interface devices using a Ethernet OSI Layer 2 packet header with an IEEE 802.1p tag control information field having a priority field.

17. An apparatus as recited in claim 16, wherein the priority field is used to select a wireless interface based on a priority criteria selected from the group consisting essentially of frame quality, receive frame CRC error, and signal strength.

18. An apparatus as recited in claim 13, wherein said switch engine comprises a QoS priority queuing module, a VLAN bandwidth tagging module, a bridge switching module, and a switching/packet management table.

19. A network interface switching apparatus, comprising:

a protocol stack for a given interconnection model configured for operation within a wireless device;

a switch engine integrated into a data link layer of said protocol stack;

said switch engine including means for communicating with a mobile device;

said switch engine including means for communicating with at least two wireless network interface devices of different types associated with said mobile device;

said switch engine including means for, as said mobile device roams among a plurality of wireless networks, selecting a corresponding one of said plurality of wireless network interface devices for seamless roaming between different types of wireless networks without closing and restarting the network connection session as established in a session layer above the data link layer;

wherein said means for selecting provides power management to shut down, or to place into standby, the wireless network interface devices that are not being used to manage power consumption.

20. An apparatus as recited in claim 19

wherein said switch engine is within layer 2, the data link layer, of the Open Systems Interconnection (OSI) reference model of said protocol stack;

wherein said protocol stack is for a TCP/IP protocol; and

wherein said switch engine communicates with said mobile device using TCP/IP protocol.

21. An apparatus as recited in claim 20, wherein said switch engine provides a PPP-less interface with said mobile device.

22. An apparatus as recited in claim 19, wherein said switch engine communicates with said wireless interface devices using a Ethernet OSI Layer 2 packet header with an IEEE 802.1p tag control information field having a priority field.

23. An apparatus as recited in claim 22, wherein the priority field is used to select a wireless interface based on a priority criteria selected from the group consisting essentially of frame quality, receive frame CRC error, and signal strength.

24. An apparatus as recited in claim 19, wherein said switch engine comprises a QoS priority queuing module, a VLAN bandwidth tagging module, a bridge switching module, and a switching/packet management table.

25. A network interface switching apparatus, comprising:

a protocol stack for a given interconnection model configured for operation within a wireless device;

a switch engine integrated into a data link layer of said protocol stack;

said switch engine including means for bridging a mobile device and at least two of wireless network interface devices of different types associated with said mobile device;

wherein as said mobile device roams among a plurality of wireless networks, said switch engine automatically selects a corresponding wireless interface network device for seamless roaming between different types of wireless networks without closing and restarting the network connection session as established in a session layer above the data link layer;

wherein said switch engine provides power management to shut down, or to place into standby, the wireless network interface devices that are not being used to manage power consumption.

26. An apparatus as recited in claim 25

wherein said switch engine is within layer 2, the data link layer, of the Open Systems Interconnection (OSI) reference model of said protocol stack;

wherein said protocol stack is for a TCP/IP protocol; and

wherein said switch engine communicates with said mobile device using TCP/IP protocol.

27. An apparatus as recited in claim 26, wherein said switch engine provides a PPP-less interface with said mobile device.

28. An apparatus as recited in claim 25, wherein said switch engine communicates with said wireless interface devices using a Ethernet OSI Layer 2 packet header with an IEEE 802.1p tag control information field having a priority field.

29. An apparatus as recited in claim 28, wherein the priority field is used to select a wireless interface based on a priority criteria selected from the group consisting essentially of frame quality, receive frame CRC error, and signal strength.

30. An apparatus as recited in claim 25, wherein said switch engine comprises a QoS priority queuing module, a VLAN bandwidth tagging module, a bridge switching module, and a switching/packet management table.

31. A network interface switching apparatus, comprising:

a protocol stack for a given interconnection model configured for operation within a wireless device;

a switch engine integrated into a data link layer of said protocol stack;

said switch engine including means for communicating with a mobile device;

said switch engine including means for communicating with at least two wireless network interface devices of different types associated with said mobile device;

said switch engine including means for bridging a mobile device and at least two wireless network interface devices of different types associated with said mobile device;

wherein as said mobile device roams among a plurality of wireless networks and said switch engine automatically selects a corresponding wireless network interface device for seamless roaming between different types of wireless networks without closing and restarting the network connection session as established in a session layer above the data link layer;

wherein said switch engine provides power management to shut down, or to place into standby, the wireless network interface devices that are not being used to manage power consumption.

32. An apparatus as recited in claim 31:

wherein said switch engine is within layer 2, the data link layer, of the Open Systems Interconnection (OSI) reference model of said protocol stack;

wherein said protocol stack is for a TCP/IP protocol; and

wherein said switch engine communicates with said mobile device using TCP/IP protocol.

33. An apparatus as recited in claim 32, wherein said switch engine provides a PPP-less interface with said mobile device.

34. An apparatus as recited in claim 31, wherein said switch engine communicates with said wireless interface devices using a Ethernet OSI Layer 2 packet header with an IEEE 802.1p tag control information field having a priority field.

35. An apparatus as recited in claim 34, wherein the priority field is used to select a wireless interface based on a priority criteria selected from the group consisting essentially of frame quality, receive frame CRC error, and signal strength.

36. An apparatus as recited in claim 31, wherein said switch engine comprises a QoS priority queuing module, a VLAN bandwidth tagging module, a bridge switching module, and a switching/packet management table.

37. A multi-network communication apparatus, comprising:

a mobile device;

a protocol stack for a given interconnection model configured for operation within said mobile device; and

a switch engine associated with said mobile device within a data link layer of said protocol stack;

said switch engine configured to automatically select a corresponding one of at least two wireless network interface devices of different types associated with said mobile device while said mobile device roams between different types of wireless networks without closing and restarting the network connection session as established in a session layer above the data link layer;

wherein said switch engine provides power management to shut down, or to place into standby, the wireless network interface devices that are not being used to manage power consumption.

38. An apparatus as recited in claim 37:

wherein said switch engine is within layer 2, the data link layer, of the Open Systems Interconnection (OSI) reference model of said protocol stack;

wherein said protocol stack is for a TCP/IP protocol; and

wherein said switch engine communicates with said mobile device using TCP/IP protocol.

39. An apparatus as recited in claim 38, wherein said switch engine provides a PPP-less interface with said mobile device.

40. An apparatus as recited in claim 37, wherein said switch engine communicates with said wireless interface devices using a Ethernet OSI Layer 2 packet header with an IEEE 802.1p tag control information field having a priority field.

41. An apparatus as recited in claim 40, wherein the priority field is used to select a wireless interface based on a priority criteria selected from the group consisting essentially of frame quality, receive frame CRC error, and signal strength.

42. An apparatus as recited in claim 37, wherein said switch engine comprises a QoS priority queuing module, a VLAN bandwidth tagging module, a bridge switching module, and a switching/packet management table.

43. A multi-network communication apparatus, comprising:

a mobile device;

a protocol stack for a given interconnection model configured for operation within said mobile device; and

a switch engine associated with said mobile device within a data link layer of said protocol stack;

said switch engine configured as a bridge between said mobile device and at least two wireless network interface devices associated with said mobile device;

wherein as said mobile device roams between different types of wireless networks said switch engine automatically selects a corresponding wireless network interface device for seamless roaming without closing and restarting the network connection session as established in a session layer above the data link layer;

wherein said switch engine provides power management to shut down, or to place into standby, the wireless network interface devices that are not being used to manage power consumption.

44. An apparatus as recited in claim 43:

wherein said switch engine is within layer 2, the data link layer, of the Open Systems Interconnection (OSI) reference model of said protocol stack;

wherein said protocol stack is for a TCP/IP protocol; and

wherein said switch engine communicates with said mobile device using TCP/IP protocol.

45. An apparatus as recited in claim 44, wherein said switch engine provides a PPP-less interface with said mobile device.

46. An apparatus as recited in claim 43, wherein said switch engine communicates with said wireless interface devices using a Ethernet OSI Layer 2 packet header with an IEEE 802.1p tag control information field having a priority field.

47. An apparatus as recited in claim 46, wherein the priority field is used to select a wireless interface based on a priority criteria selected from the group consisting essentially of frame quality, receive frame CRC error, and signal strength.

48. An apparatus as recited in claim 43, wherein said switch engine comprises a QoS priority queuing module, a VLAN bandwidth tagging module, a bridge switching module, and a switching/packet management table.

49. A multi-network communication apparatus, comprising:

a mobile device;

a protocol stack for a given interconnection model configured for operation within a mobile device;

a switch engine within a data link layer of said protocol stack of said mobile device; and

said switch engine including means for-automatically selecting a corresponding one of at least two wireless network interface devices associated with said mobile device for seamless roaming among a plurality of wireless networks of at least two different types without closing and restarting the network connection session as established in a session layer above the data link layer;

wherein said means for selecting provides power management to shut down, or to place into standby, the wireless network interface devices that are not being used to manage power consumption.

50. An apparatus as recited in claim 49:

wherein said switch engine is within layer 2, the data link layer, of the Open Systems Interconnection (OSI) reference model of said protocol stack;

wherein said protocol stack is for a TCP/IP protocol; and

wherein said switch engine communicates with said mobile device using TCP/IP protocol.

51. An apparatus as recited in claim 50, wherein said switch engine provides a PPP-less interface with said mobile device.

52. An apparatus as recited in claim 49, wherein said switch engine communicates with said wireless interface devices using a Ethernet OSI Layer 2 packet header with an IEEE 802.1p tag control information field having a priority field.

53. An apparatus as recited in claim 52, wherein the priority field is used to select a wireless interface based on a priority criteria selected from the group consisting essentially of frame quality, receive frame CRC error, and signal strength.

54. An apparatus as recited in claim 49, wherein said switch engine comprises a QoS priority queuing module, a VLAN bandwidth tagging module, a bridge switching module, and a switching/packet management table.

55. A multi-network communication apparatus, comprising:

a mobile device;

a protocol stack for a given interconnection model configured for operation within a mobile device; and

a switch engine within a data link layer of said protocol stack of said mobile device; and

said switch engine including means for communicating with said mobile device;

said switch engine including means for communicating with a plurality of wireless network interface devices associated with said mobile device;

said switch engine including means for-selecting a corresponding one of said plurality of wireless network interface devices for seamless roaming among a plurality of wireless networks of at least two different types without closing and restarting the network connection session as established in a session layer above the data link layer;

wherein said switch engine provides power management to shut down, or to place into standby, the wireless network interface devices that are not being used to manage power consumption.

56. An apparatus as recited in claim 55:

wherein said switch engine is within layer 2, the data link layer, of the Open Systems Interconnection (OSI) reference model of said protocol stack;

wherein said protocol stack is for a TCP/IP protocol; and

wherein said switch engine communicates with said mobile device using TCP/IP protocol.

57. An apparatus as recited in claim 56, wherein said switch engine provides a PPP-less interface with said mobile device.

58. An apparatus as recited in claim 55, wherein said switch engine communicates with said wireless interface devices using a Ethernet OSI Layer 2 packet header with an IEEE 802.1p tag control information field having a priority field.

59. An apparatus as recited in claim 58, wherein the priority field is used to select a wireless interface based on a priority criteria selected from the group consisting essentially of frame quality, receive frame CRC error, and signal strength.

60. An apparatus as recited in claim 55, wherein said switch engine comprises a QoS priority queuing module, a VLAN bandwidth tagging module, a bridge switching module, and a switching/packet management table.

61. A multi-network communication apparatus, comprising:

a mobile device;

a protocol stack for a given interconnection model configured for operation within a wireless device; and

a switch engine within a data link layer of said protocol stack of said mobile device;

said switch engine including means for bridging said mobile device and at least two wireless network interface devices of different types associated with said mobile device;

wherein as said mobile device roams among a plurality of wireless networks and said switch engine automatically selects a corresponding wireless network interface device for seamless roaming between different types of wireless networks without closing and restarting the network connection session as established in a session layer above the data link layer;

wherein said switch engine provides power management to shut down, or to place into standby, the wireless network interface devices that are not being used to manage power consumption.

62. An apparatus as recited in claim 61:

wherein said switch engine is within layer 2, the data link layer, of the Open Systems Interconnection (OSI) reference model of said protocol stack;

wherein said protocol stack is for a TCP/IP protocol; and

wherein said switch engine communicates with said mobile device using TCP/IP protocol.

63. An apparatus as recited in claim 62, wherein said switch engine provides a PPP-less interface with said mobile device.

64. An apparatus as recited in claim 61, wherein said switch engine communicates with said wireless interface devices using a Ethernet OSI Layer 2 packet header with an IEEE 802.1p tag control information field having a priority field.

65. An apparatus as recited in claim 64, wherein the priority field is used to select a wireless interface based on a priority criteria selected from the group consisting essentially of frame quality, receive frame CRC error, and signal strength.

66. An apparatus as recited in claim 61, wherein said switch engine comprises a QoS priority queuing module, a VLAN bandwidth tagging module, a bridge switching module, and a switching/packet management table.

67. A multi-network communication apparatus, comprising:

a mobile device;

a protocol stack for a given interconnection model configured for operation within a wireless device; and

a switch engine within a data link layer of said protocol stack of said mobile device;

said switch engine including means for communicating with said mobile device;

said switch engine including means for communicating with at least two wireless network interface devices of different types associated with said mobile device;

said switch engine including means for bridging a mobile device and a plurality of wireless network interface devices associated with said mobile device;

wherein as said mobile device roams among a plurality of wireless networks and said switch engine automatically selects a corresponding wireless network device for seamless roaming between different types of wireless networks without closing and restarting the network connection session as established in a session layer above the data link layer;

wherein said switch engine provides power management to shut down, or to place into standby, the wireless network interface devices that are not being used to manage power consumption.

68. An apparatus as recited in claim 67:

wherein said switch engine is within layer 2, the data link layer, of the Open Systems Interconnection (OSI) reference model of said protocol stack;

wherein said protocol stack is for a TCP/IP protocol; and

wherein said switch engine communicates with said mobile device using TCP/IP protocol.

69. An apparatus as recited in claim 68, wherein said switch engine provides a PPP-less interface with said mobile device.

70. An apparatus as recited in claim 67, wherein said switch engine communicates with said wireless interface devices using a Ethernet OSI Layer 2 packet header with an IEEE 802.1p tag control information field having a priority field.

71. An apparatus as recited in claim 70, wherein the priority field is used to select a wireless interface based on a priority criteria selected from the group consisting essentially of frame quality, receive frame CRC error, and signal strength.

72. An apparatus as recited in claim 67, wherein said switch engine comprises a QoS priority queuing module, a VLAN bandwidth tagging module, a bridge switching module, and a switching/packet management table.