USB encapsulation for network transmission

• US 7,734,758 B1
• Filed: 07/19/2000
• Issued: 06/08/2010
• Est. Priority Date: 07/19/2000
• Status: Active Grant

• Current Assignee: Cisco Technology, Inc. (Cisco Systems, Inc.)
• Original Assignee: Cisco Technology, Inc. (Cisco Systems, Inc.)
• Inventors: Shively, Darrell, Lo Bue, Brian, Nadeau, Larry, Roden, Thomas A.
• Primary Examiner(s): STRANGE, AARON N
• Application Number:
  US09/618,950
• Time in Patent Office: 3,611 Days
• Field of Search: 710/313, 710 8- 19, 709/249, 709/219, 709/217, 709/227, 709223-224, 709/250
• US Class Current: 709/224
• CPC Class Codes: G06F 13/385 for adaptation of a particular data processing system to different peripheral devices
• CPC Class Codes: H04L 61/5038 for local use, e.g. in LAN or USB networks, or in a controller area network [CAN]

Abstract

A universal serial bus (USB) remote host control driver includes a connection to a local network, a network protocol stack and a memory for storing network addresses of USB device adapters and USB devices on the network. A USB device adapter has one or more USB ports, a network connection, a network address, and a network protocol stack. Together, the USB remote host control driver and the USB device adapter enable interaction between a network computer and peripheral USB devices on the network.

Claims

1. A universal serial bus (USB) remote host control driver, comprising:

a port for connection to a network, the remote host control driver configured to communicate with one or more USB device adapters via the port over the network, each of the one or more USB device adapters having a discrete network address;

a network protocol stack, the protocol stack configured for encapsulating USB packets in network packets and for decapsulating USB packets from network packets, wherein the USB device adapters are coupled to USB devices that send USB packets to a USB protocol stack, which passes those packets to a network bridging task that identifies address information associated with the USB devices and the remote host control driver, and that passes the address information to the network protocol stack;

a polling routine configured to poll each of possible USB device adapters connected to the network in accordance with a candidate list, and compile a master list of only the possible USB device adapters which responded to the polling and are therefore currently capable of establishing a connection over the network, wherein the candidate list is initially configured with one or more possible USB device adapters, wherein the polling routine is further configured to encapsulate a USB packet in one or more network packets; and

a memory for storing the master list, the master list containing the discrete network address of each of the one or more USB device adapters which responded to the polling and a corresponding identifier of each USB device connected via the corresponding USB device adapter to the remote host control driver.

2. The USB remote host control driver of claim 1, wherein the polling routine is further configured to contact each of the USB device adapters which responded to the polling in accordance with the master list, identify each of the USB devices connected to each USB device adapter, and store the identifications of the USB devices in the memory.

3. The USB host control driver of claim 1, where the network packets are Ethernet packets.

4. The USB remote host control driver of claim 1 wherein the candidate list is configured manually.

5. The USB remote host control driver of claim 1, further comprising a plug-and-play routine to configure the candidate list.

6. The USB remote host control driver of claim 1 wherein the remote host control driver is further configured to:

dynamically detect that a new USB device adapter has been introduced, enabled, or connected to the network; and

generate a new candidate list in response to the detecting.

7. The USB remote host control driver of claim 1 wherein the remote host control driver is further configured to:

periodically poll the network to detect that a new USB device adapter has been introduced, enabled, or connected to the network; and

generate a new candidate list in response to the detecting.

16. The Internet gateway of claim 6 wherein the candidate list is configured manually.

17. The Internet gateway of claim 6, further comprising a plug-and-play routine to configure the candidate list.

8. An Internet gateway, comprising:

a port for connecting to the Internet; and

a universal serial bus (USB) remote host control driver, the USB remote host control driver comprising;

a port for connecting to a local network, the remote host control driver configured to communicate with one or more USB device adapters via the port over the network, each of the one or more USB device adapters having a discrete network address;

a local network protocol stack, the protocol stack for encapsulating USB packets in local network packets and for decapsulating USB packets from local network packets, wherein the USB device adapters are coupled to USB devices that send USB packets to a USB protocol stack, which passes those packets to a network bridging task that identifies address information associated with the USB devices and the remote host control driver, and that passes the address information to the network protocol stack;

a polling routine configured to poll each of possible USB device adapters connected to the local network in accordance with a candidate list, and compile a master list of only the possible USB device adapters which responded to the polling and are therefore currently capable of establishing a connection over the network, wherein the candidate list is initially configured with one or more possible USB device adapters, wherein the polling routine is further configured to encapsulate a USB packet in one, or more network packets; and

a memory for storing the master list, the master list containing the discrete network address of each of the USB device adapters which responded to the polling and an identifier of each USB device connected via the corresponding USB device adapter to the remote host control driver.

9. The Internet gateway of claim 8, where the local network is an Ethernet.

10. The Internet gateway of claim 8, further comprising a processor configured to receive unencapsulated USB packets from the protocol stack.

11. The Internet gateway of claim 10, further comprising:

a means for connecting to a local video monitor.

12. The Internet gateway of claim 10, further comprising:

a means for connecting to a local telephone.

13. The Internet gateway of claim 10, further comprising:

a means for connecting to a public television cable.

14. The Internet gateway of claim 10, further comprising:

a means for connecting to a public telephone network.

15. The Internet gateway of claim 8, wherein the polling routine is further configured to contact each of the device adapters which responded to the polling in accordance with the master list, identify each of the USB devices connected to each device adapter, and store the identifications of the USB devices in the memory.

18. The Internet gateway of claim 8 wherein the USB remote host control driver is further configured to:

dynamically detect that a new USB device adapter has been introduced, enabled, or connected to the network; and

generate a new candidate list in response to the detecting.

19. The Internet gateway of claim 8 wherein the USB remote host control driver is further configured to:

periodically poll the network to detect that a new USB device adapter has been introduced, enabled, or connected to the network; and

generate a new candidate list in response to the detecting.

20. A serial data bus remote host control driver, comprising:

a port for connecting to a network, the remote host control driver configured to communicate with one or more serial data bus device adapters via the port over the network, each of the one or more serial data bus device adapters having a discrete network address;

a network protocol stack, the protocol stack for encapsulating serial data bus packets in network packets and for decapsulating serial data bus packets from network packets, wherein the USB device adapters are coupled to USB devices that send USB packets to a USB protocol stack, which passes those packets to a network bridging task that identifies address information associated with the USB devices and the remote host control driver, and that passes the address information to the network protocol stack;

a polling routine configured to poll each of possible device adapters connected to the network in accordance with a candidate list, and compile a master list of only the possible serial data bus device adapters which responded to the polling and are therefore currently capable of establishing a connection over the network, wherein the candidate list is initially configured with one or more possible serial data bus device adapters, wherein the polling routine is further configured to encapsulate a USB packet in one or more network packets; and

a memory for storing the master list, the master list containing the discrete network address of each of the device adapters which responded to the polling and an identifier of each serial data bus device connected via the corresponding serial data bus device adapter to the remote host control driver.

21. The serial data bus remote host control driver of claim 20, wherein the polling routine is further configured to contact each of the device adapters which responded to the polling in accordance with the master list, identify each of the serial data bus devices connected to each device adapter, and store the identifications of the serial data bus device in the memory.

22. The serial data bus host control driver of claim 20, where the network packets are Ethernet packets.

23. The serial data bus remote host control driver of claim 20 wherein the candidate list is configured manually.

24. The serial data bus remote host control driver of claim 20, further comprising a plug-and-play routine to configure the candidate list.

25. The serial data bus remote host control driver of claim 20 wherein the remote host control driver is further configured to:

dynamically detect that a new serial data bus device adapter has been introduced, enabled, or connected to the network; and

generate a new candidate list in response to the detecting.

26. The serial data bus remote host control driver of claim 20 wherein the remote host control driver is further configured to:

periodically poll the network to detect that a new serial data bus device adapter has been introduced, enabled, or connected to the network; and

generate a new candidate list in response to the detecting.

27. An Internet gateway, comprising:

a port for connecting to the Internet; and

a serial data bus remote host control driver, the serial data bus remote host control driver comprising;

a port for connecting to a local network, the remote host control driver configured to communicate with one or more serial data bus device adapters via the port over the network, each of the one or more serial data bus device adapters having a discrete network address;

a local network protocol stack, the protocol stack for encapsulating serial data bus packets in local network packets and for decapsulating serial data bus packets from network packets, wherein the USB device adapters are coupled to USB devices that send USB packets to a USB protocol stack, which passes those packets to a network bridging task that identifies address information associated with the USB devices and the remote host control driver, and that passes the address information to the network protocol stack;

a polling routine configured to poll each of possible device adapters connected to the network in accordance with a candidate list, and compile a master list of only the serial data bus device adapters which responded to the polling and are therefore currently capable of establishing a connection over the network, wherein the candidate list is initially configured with one or more possible serial data bus device adapters, wherein the polling routine is further configured to encapsulate a USB packet in one or more network packets; and

a memory for storing the master list, the master list containing the discrete network address of each of the device adapters which responded to the polling and an identifier of each serial data bus device connected via the corresponding serial data bus device adapter to the remote host control driver.

28. The Internet gateway of claim 27, where the local network is an Ethernet.

29. The Internet gateway of claim 27, further comprising a processor configured to receive unencapsulated serial data bus packets from the protocol stack.

30. The Internet gateway of claim 29, further comprising a means for connecting to a local video monitor.

31. The Internet gateway of claim 29, further comprising a means for connecting to a local telephone.

32. The Internet gateway of claim 29, further comprising a means for connecting to a public television cable.

33. The Internet gateway of claim 29, further comprising a means for connecting to a public telephone network.

34. The Internet gateway of claim 27, wherein the polling routine is further configured to contact each of the device adapters which responded to the polling in accordance with the master list, identify each of the serial data bus devices connected to each device adapter, and store the identifications of the serial data bus devices in the memory.

35. The Internet gateway of claim 27 wherein the candidate list is configured manually.

36. The Internet gateway of claim 27, further comprising a plug-and-play routine to configure the candidate list.

37. The Internet gateway of claim 27 wherein the serial data bus remote host control driver is further configured to:

dynamically detect that a new serial data bus device adapter has been introduced, enabled, or connected to the network; and

generate a new candidate list in response to the detecting.

38. The Internet gateway of claim 27 wherein the serial data bus remote host control driver is further configured to:

periodically poll the network to detect that a new serial data bus device adapter has been introduced, enabled, or connected to the network; and

generate a new candidate list in response to the detecting.

39. A universal serial bus (USB) remote host control driver, comprising:

means for connecting to a network, the remote host control driver configured to communicate with one or more USB device adapters via the means for connecting over the network, each of the one or more USB device adapters having a discrete network address;

means for encapsulating USB packets in network packets and for decapsulating USB packets from network packets, wherein the USB device adapters are coupled to USB devices that send USB packets to a USB protocol stack, which passes those packets to a network bridging task that identifies address information associated with the USB devices and the remote host control driver, and that passes the address information to the means for encapsulating;

means for polling each of possible USB device adapters connected to the network in accordance with a candidate list, and compile a master list of only the possible USB device adapters which responded to the polling and are therefore currently capable of establishing a connection over the network, wherein the candidate list is initially configured with one or more possible USB device adapters, wherein the polling includes encapsulating a USB packet in one or more network packets; and

means for storing the master list, the master list containing the discrete network address of each of the USB device adapters which responded to the polling and an identifier of each USB device connected via the corresponding USB device adapter to the remote host control driver.

40. The USB remote host control driver of claim 39, wherein the means for polling is further configured to contact each of the device adapters which responded to the polling in accordance with the master list, identify each of the USB devices connected to each USB device adapter, and store the identifications of the USB devices in the means for storing.

41. An Internet gateway, comprising:

means for connecting to the Internet; and

a universal serial bus (USB) remote host control driver, the USB remote host control driver comprising;

means for connecting to a network, the remote host control driver configured to communicate with one or more USB device adapters via the means for connecting over the network, each of the one or more USB device adapters having a discrete network address;

means for encapsulating USB packets in network packets and for decapsulating USB packets from network packets, wherein the USB device adapters are coupled to USB devices that send USB packets to a USB protocol stack, which passes those packets to a network bridging task that identifies address information associated with the USB devices and the remote host control driver, and that passes the address information to the means for encapsulating;

means for polling each of possible USB device adapters connected to the network in accordance with a candidate list, and compile a master list of only the possible USB device adapters which responded to the polling and are therefore currently capable of establishing a connection over the network, wherein the candidate list is initially configured with one or more possible USB device adapters, wherein the polling includes encapsulating a USB packet in one or more network packets; and

means for storing the master list, the master list containing the discrete network address of each of the USB device adapters which responded to the polling and an identifier of each USB device connected via the corresponding USB device adapter to the remote host control driver.

42. The Internet gateway of claim 41, wherein the means for polling is further configured to contact each of the USB device adapters which responded to the polling in accordance with the master list, identify each of the USB devices connected to each USB device adapter, and storing the identifications of the USB devices in the means for storing.

43. A serial data bus remote host control driver, comprising:

means for connecting to a network, the remote host control driver configured to communicate with one or more serial data bus device adapters via the means for connecting over the network, each of the one or more serial data bus device adapters having a discrete network address;

means for encapsulating serial data bus packets in network packets and for decapsulating serial data bus packets from network packets, wherein the USB device adapters are coupled to USB devices that send USB packets to a USB protocol stack, which passes those packets to a network bridging task that identifies address information associated with the USB devices and the remote host control driver, and that passes the address information to the means for encapsulating;

means for polling each of possible device adapters connected to the network in accordance with a candidate list, and compile a master list of only the serial data bus device adapters which responded to the polling and are therefore currently capable of establishing a connection over the network, wherein the candidate list is initially configured with one or more possible serial data bus device adapters, wherein the polling includes encapsulating a USB packet in one or more network packets; and

means for storing the master list, the master list containing the discrete network address of each of the device adapters which responded to the polling and an identifier of each serial data bus device connected via the corresponding serial data bus device adapter to the remote host control driver.

44. The serial data bus remote host control driver of claim 43, wherein the means for polling is further configured to contact each of the device adapters which responded to the polling in accordance with the master list, identify each of the serial data bus devices connected to each device adapter, and store the identifications of the serial data bus devices in the means for storing.

45. An Internet gateway, comprising:

means for connecting to the Internet; and

a serial data bus remote host control driver, the serial data bus remote host control driver comprising;

(a) means for connecting to a network, the remote host control driver configured to communicate with one or more serial data bus device adapters via the means for connecting over the network, each of the one or more serial data bus device adapters having a discrete network address;

(b) means for encapsulating serial data bus packets in network packets and for decapsulating serial data bus packets from network packets, wherein the USB device adapters are coupled to USB devices that send USB packets to a USB protocol stack, which passes those packets to a network bridging task that identifies address information associated with the USB devices and the remote host control driver, and that passes the address information to the means for encapsulating;

(c) means for polling each of possible device adapters connected to the network in accordance with a candidate list, and compile a master list of only the serial data bus device adapters which responded to the polling and are therefore currently capable of establishing a connection over the network, wherein the candidate list is initially configured with one or more possible serial data bus device adapters, wherein the polling includes encapsulating a USB packet in one or more network packets; and

(d) means for storing the master list, the master list containing the discrete network address of each of the device adapters which responded to the polling and an identifier of each serial data bus device connected via the corresponding serial data bus device adapter to the remote host control driver.

46. The Internet gateway of claim 45, wherein the means for polling is further configured to contact each of the device adapters which responded to the polling in accordance with the master list, identify each of the serial data bus devices connected to each device adapter, and storing the identifications of the serial data bus devices in the means for storing.

47. A system comprising:

a universal serial bus (USB) remote host control driver; and

at least one universal serial bus (USB) device adapter, the USB remote host control driver being connected to at least one USB device via the at least one USB device adapter over a network,

wherein the USB remote host control driver comprising;

a port for connecting to the network, the remote host control driver configured to communicate with the at least one USB device adapter via the port over the network, each USB device adapter having a discrete network address;

a network protocol stack, the protocol stack for encapsulating USB packets in network packets and for decapsulating USB packets from network packets;

a polling routine configured to poll each of possible USB device adapters connected to the network in accordance with a candidate list, and compile a master list of only the possible USB device adapters which responded to the polling and are therefore currently capable of establishing a connection over the network, wherein the candidate list is initially configured with one or more possible USB device adapters, wherein the polling routine is further configured to encapsulate a USB packet in one or more network packets; and

a memory for storing the master list, the master list containing the discrete network address of each of the USB device adapters which responded to the polling and an identifier of each USB device connected via the corresponding USB device adapter to the remote host control driver,

and wherein each of the one or more USB device adapters comprises;

a memory for storing an assigned network address;

a network protocol stack, the protocol stack for encapsulating USB packets in network packets and for decapsulating USB packets from the network packets; and

a bridging task for receiving USB packets from one or more USB devices coupled to the corresponding USB device adapters and for passing USB device addressing information and the USB packets to the network protocol stack.

48. The system of claim 47, wherein the polling routine is further configured to contact each of the USB device adapters which responded to the polling in accordance with the master list, identify each of the USB devices connected to each USB device adapter, and store the identifications of the USB devices in the memory.

49. The system of claim 47, wherein the network packets are Ethernet packets.

50. The system of claim 47 wherein the candidate list is configured manually.

51. The system of claim 47, further comprising a plug-and-play routine to configure the candidate list.

52. The system of claim 47 wherein the USB remote host control driver is further configured to:

dynamically detect that a new USB device adapter has been introduced, enabled, or connected to the network; and

generate a new candidate list in response to the detecting.

53. The system of claim 47 wherein the USB remote host control driver is further configured to:

periodically poll the network to detect that a new USB device adapter has been introduced, enabled, or connected to the network; and

generate a new candidate list in response to the detecting.

54. A system comprising:

a serial data bus remote host control driver; and

at least one serial data bus device adapter, the serial data bus remote host control driver connected to at least one serial data bus device via the at least one the serial data bus device adapter over a network,

wherein the serial data bus remote host control driver comprising;

a port for connecting to the network, the remote host control driver configured to communicate with at least one serial data bus device adapter via the port over the network, each of the at least one serial data bus device adapter having a discrete network address;

a network protocol stack, the protocol stack for encapsulating serial data bus packets in network packets and for decapsulating serial data bus packets from network packets;

a polling routine configured to poll each of possible device adapters connected to the network in accordance with a candidate list, and compile a master list of only the serial data bus device adapters which responded to the polling and are therefore currently capable of establishing a connection over the network, wherein the candidate list is initially configured with one or more possible serial data bus device adapters, wherein the polling routine is further configured to encapsulate a USB packet in one or more network packets; and

a memory for storing the master list, the master list containing the discrete network address of each of the device adapters and an identifier of each serial data bus device connected via the corresponding serial data bus device adapter to the remote host control driver,

and wherein each of the at least one serial data bus device adapter comprises;

a memory for storing an assigned network address;

a network protocol stack, the protocol stack for encapsulating serial data bus packets in network packets and for decapsulating serial data bus packets from the network packets; and

a bridging task for receiving serial data bus packets from one or more serial data bus devices coupled to the corresponding device adapters and for passing serial data bus device addressing information and the serial data bus packets to the network protocol stack.

55. The system of claim 54, wherein the polling routine is further configured to contact each of the device adapters which responded to the polling in accordance with the master list, identify each of the serial data bus devices connected to each device adapter, and store the identifications of the serial data bus devices in the memory.

56. The system of claim 54, where the network packets are Ethernet packets.

57. The system of claim 54 wherein the candidate list is configured manually.

58. The system of claim 54, further comprising a plug-and-play routine to configure the candidate list.

59. The system of claim 54 wherein the serial data bus remote host control driver is further configured to:

dynamically detect that a new serial data bus device adapter has been introduced, enabled, or connected to the network; and

generate a new candidate list in response to the detecting.

60. The system of claim 54 wherein the serial data bus remote host control driver is further configured to:

periodically poll the network to detect that a new serial data bus device adapter has been introduced, enabled, or connected to the network; and

generate a new candidate list in response to the detecting.

61. A system comprising:

a universal serial bus (USB) remote host control driver; and

at least one USB device adapter, the USB remote host control driver connected to the corresponding USB devices via the at least one USB device adapter over a network,

wherein the USB remote host control driver comprises;

means for connecting to the network, the remote host control driver configured to communicate with the at least one USB device adapter via the means over the network, each of the at least one USB device adapter having a discrete network address;

means for encapsulating USB packets in network packets and for decapsulating USB packets from network packets;

means for polling each of possible USB device adapters connected to the network in accordance with a candidate list, and compile a master list of only the possible USB device adapters which responded to the polling and are therefore currently capable of establishing a connection over the network, wherein the candidate list is initially configured with one or more possible USB device adapters, wherein the polling includes encapsulating a USB packet in one or more network packets; and

means for storing the master list, the master list containing the discrete network address of each of the USB device adapters which responded to the polling and an identifier of each USB device connected via the corresponding USB device adapter to the remote host control driver,

and wherein each of the USB device adapters comprises;

means for storing an assigned network address;

means for encapsulating USB packets in network packets and for decapsulating USB packets from the network packets; and

means for receiving USB packets from one or more USB devices coupled to the corresponding USB device adapters and for passing USB device addressing information and the USB packets to the means for encapsulating.

62. The system of claim 61, wherein the means for polling is further configured to contact each of the USB device adapters which responded to the polling in accordance with the master list, identify each of the USB devices connected to each USB device adapter, and store the identifications of the USB devices in the means for storing.

63. A system comprising:

a serial data bus remote host control driver; and

at least one serial data bus device adapter, the serial data bus remote host control driver connected to at least one serial data bus device via at least one serial data bus device adapter over a network,

wherein the serial data bus remote host control driver comprising;

means for connecting to the network, the remote host control driver configured to communicate with the at least one serial data bus device adapter via the means over the network, each of the at least one serial data bus device adapters having a discrete network address;

means for encapsulating serial data bus packets in network packets and for decapsulating serial data bus packets from network packets;

means for polling each of possible serial data bus device adapters connected to the network in accordance with a candidate list, and compile a master list of only the serial data bus device adapters which responded to the polling and are therefore currently capable of establishing a connection over the network, wherein the candidate list is initially configured with one or more possible serial data bus device adapters, wherein the polling includes encapsulating a USB packet in one or more network packets; and

means for storing the master list, the master list containing the discrete network address of each of the at least one serial data bus device adapter and an identifier of each serial data bus device connected via the corresponding serial data bus device adapter to the remote host control driver,

and wherein each of the at least one serial data bus device adapters comprising;

means for storing an assigned network address;

means for encapsulating serial data bus packets in network packets and for decapsulating serial data bus packets from the network packets; and

means for receiving serial data bus packets from one or more serial data bus devices coupled to the corresponding device adapters and for passing serial data bus device addressing information and the serial data bus packets to the means for encapsulating.

64. The system of claim 63, wherein the means for polling is further configured to contact each of the device adapters which responded to the polling in accordance with the master list, identify each of the serial data bus devices connected to each device adapter, and store the identifications of the serial data bus devices in the means for storing.