Automatic configuration system for mapping node addresses within a bus structure to their physical location

• US 6,131,119 A
• Filed: 04/01/1997
• Issued: 10/10/2000
• Est. Priority Date: 04/01/1997
• Status: Expired due to Fees

• Current Assignee: Sony Transcom Incorporated (Rockwell International Corporation), Sony Corporation (Sony Group Corp.)
• Original Assignee: Sony Transcom Incorporated (Rockwell International Corporation), Sony Corporation (Sony Group Corp.)
• Inventors: Fukui, Toshiharu
• Primary Examiner(s): Maung, Zarni
• Assistant Examiner(s): Coulter, Kenneth R.
• Application Number:
  US08/831,063
• Time in Patent Office: 1,288 Days
• Field of Search: 395/200.51, 395/200.5, 709/221, 709/220, 709/224, 709/227
• US Class Current: 709/224
• CPC Class Codes: H04L 12/40078 Bus configuration home automation networks H04L12/2803; arrangements for maintenance or administration H04L41/00
• CPC Class Codes: H04L 61/5014 using dynamic host configuration protocol [DHCP] or bootstrap protocol [BOOTP]
• CPC Class Codes: H04L 61/5038 for local use, e.g. in LAN or USB networks, or in a controller area network [CAN]

Abstract

An automatic configuration system maps a device address of each node coupled to a bus structure to a network protocol address corresponding to the physical location of the node. A configuration database is built which includes the network protocol address of each node and its corresponding device address. A wiring database, including each device position within the network, is maintained within a network server. Preferably, the network is an IEEE 1394 serial bus network. A topology map, including the device addresses of the nodes within the network and their relationship to each other, is generated during a self-ID sequence and is maintained by the network server. This information is then compared to the wiring database by the network server in order to build a restored topology map including the corresponding device address for each device at each position. A DHCP database is then generated which includes each device address and its corresponding network protocol address. The network protocol address corresponds to the position of the respective device. Using the DHCP database, the network protocol address is maintained for the devices at each position, in order to monitor the positions of the devices and communications from the devices.

Claims

1. A method of automatically mapping device addresses to physical locations of devices within a bus structure corresponding to the device addresses, comprising the steps of:

a. maintaining a wiring database including wiring diagram and physical locations of devices;

b. maintaining a topology map representing device addresses of devices coupled to the bus structure; and

c. comparing the wiring database to the topology map and matching device addresses of devices coupled to the bus structure to physical locations of devices.

2. The method as claimed in claim 1 wherein each device address is unique and further wherein when an existing device is replaced by a new device, the device address of the new device is different than the device address of the existing device.

3. The method as claimed in claim 1 further comprising the step of forming a configuration database including physical locations and corresponding device addresses.

4. The method as claimed in claim 3 further comprising the step of matching the device addresses to network protocol addresses corresponding to physical locations of devices.

5. The method as claimed in claim 1 wherein the bus structure is an IEEE 1394 serial bus network.

6. The method as claimed in claim 5 wherein the step of maintaining the topology map further comprises automatically generating the topology map during a self-ID sequence of IEEE 1394 protocol.

7. The method as claimed in claim 1 wherein the method is implemented within an in-flight entertainment system for use on board an aircraft.

8. The method as claimed in claim 7 wherein the devices are seat CPUs coupled to control passenger sets of seat peripherals through which passengers have access to the in-flight entertainment system.

9. The method as claimed in claim 8 wherein the wiring database is entered into and maintained by a system manager unit within a headend of the system.

10. The method as claimed in claim 9 wherein the topology map is automatically generated for a zone within the aircraft by a zone bridge unit coupled to one or more seat electronics units, wherein each seat electronics unit includes one or more seat CPUs.

11. The method as claimed in claim 10 wherein the method of automatically mapping is performed only when manually triggered during a maintenance cycle.

12. The method as claimed in claim 11 further comprising the step of updating the configuration database to include passenger information for each flight of the aircraft.

13. An apparatus for automatically mapping device addresses within a bus structure to corresponding physical locations of devices, comprising:

a. a plurality of devices coupled together to form a bus structure;

b. a network interface coupled to the bus structure and configured for controlling communications to and from the plurality of devices and for maintaining a topology map representing device addresses of each of the plurality of devices; and

c. a system controller coupled to the network interface for monitoring operation of the plurality of devices, wherein the system controller is configured for maintaining a system wiring database including a wiring diagram and physical locations of the plurality of devices and further wherein the system controller is configured for comparing the wiring database to the topology map and forming a restored topology map by matching the device addresses to a corresponding one of the physical locations of the plurality of devices.

14. The apparatus as claimed in claim 13 further comprising a display for displaying the restored topology map.

15. The apparatus as claimed in claim 13 wherein each of the plurality of devices has a corresponding unique device address and further wherein when an existing device is replaced by a new device at a physical location, the device address of the new device is different than the device address of the existing device.

16. The apparatus as claimed in claim 15 wherein the bus structure is an IEEE 1394 serial bus network.

17. The apparatus as claimed in claim 16 wherein the network interface automatically generates the topology map during self-ID sequence of IEEE 1394 protocol.

18. The apparatus as claimed in claim 13 wherein the apparatus is part of an in-flight entertainment system for use on board an aircraft and each device is a passenger control unit through which a passenger has access to the in-flight entertainment system.

19. The apparatus as claimed in claim 13 wherein the system controller further maintains a host database representing network protocol addresses of the physical locations and compares the host database to the restored topology map to form a link list, listing each device address and corresponding network protocol address.

20. The apparatus as claimed in claim 18 wherein the restored topology map is updated for each flight of the aircraft to also include passenger information thereby forming a passenger configuration database.

21. The apparatus as claimed in claim 20 further comprising a display for displaying the passenger configuration database.

22. A method of automatically mapping device addresses to network protocol addresses of device locations within a bus structure, comprising the steps of:

a. maintaining a wiring database in a first control computer including wiring diagram and physical locations of devices;

b. maintaining a topology map in a second control computer representing device addresses of devices coupled to the bus structure;

c. generating a restored topology map by combining the wiring database with the topology map to map device addresses to a corresponding physical location;

d. maintaining a host database in the first control computer representing network protocol addresses of the physical locations of devices; and

e. generating a network database by combining the host database and the restored topology map, wherein the network database includes network protocol addresses and corresponding device addresses.

23. The method as claimed in claim 22 wherein the restored topology map is generated within the first control computer.

24. The method as claimed in claim 22 wherein the network database is generated within the first control computer.

25. The method as claimed in claim 22 wherein each device address is unique and when an existing device is replaced by a new device, the device address of the new device is different than the device address of the existing device.

26. The method as claimed in claim 25 wherein the bus structure is an IEEE 1394 serial bus network.

27. The method as claimed in claim 26 wherein the topology map is automatically generated during a self-ID sequence of IEEE 1394 protocol.

28. The method as claimed in claim 22 wherein the method is implemented within an in-flight entertainment system for use on board an aircraft.

29. The method as claimed in claim 28 wherein the devices are seat CPUs coupled to control passenger sets of seat peripherals through which passengers access the in-flight entertainment system.

30. The method as claimed in claim 29 wherein the wiring database is entered into and maintained by a system manager unit within a headend of the system.

31. The method as claimed in claim 30 wherein the topology map is automatically generated for a zone within the aircraft by a zone bridge unit coupled to one or more seat electronics units, wherein each seat electronics unit includes one or more seat CPUs.

32. The method as claimed in claim 31 wherein the method of automatically mapping is performed only when manually triggered during a maintenance cycle.

33. The method as claimed in claim 32 further comprising the step of updating the configuration database to include passenger information for each flight of the aircraft.

34. The method as claimed in claim 33 further comprising the step of displaying a selected one of the network database and the configuration database.

35. An in-flight entertainment system comprising:

a. one or more zones each including;

i. a plurality of passenger control units, through which a passenger accesses the in-flight entertainment system;

ii. a plurality of seat electronics units each including at least one seat CPU coupled to each other to form a bus structure, wherein each seat CPU is coupled to control a passenger set of seat peripherals, each seat CPU having a unique device address;

iii. a control unit coupled to the bus structure for controlling communications to and from the seat CPUs and for maintaining a topology map representing device addresses of each of the seat CPUs; and

b. a system manager unit within a headend of the system, coupled to the control units for comparing the topology map to a wiring database, including a wiring diagram and physical locations of the seat CPUs, and forming a configuration database including device addresses and corresponding physical locations of seat CPUs.

36. The in-flight entertainment system as claimed in claim 35 wherein the physical locations are seat positions within the aircraft.

37. The in-flight entertainment system as claimed in claim 36 wherein the configuration database is updated for each flight of the aircraft to also include passenger information.

38. The in-flight entertainment system as claimed in claim 37 wherein the bus structure is an IEEE 1394 serial bus network.

39. The in-flight entertainment system as claimed in claim 38 wherein the topology map is automatically generated during a self-ID sequence of IEEE 1394 protocol.

40. The in-flight entertainment system as claimed in claim 39 wherein the control unit is a zone bridge unit.

41. An automatically configurable in-flight entertainment system comprising:

a. a plurality of passenger seat units, each configured as a passenger entertainment system;

b. an IEEE 1394 network for coupling the passenger seat units together;

c. a system manager unit coupled to the IEEE 1394 network for generating a topological map to correlate each of the passenger seat units to a location on the IEEE 1394 network and for generating a replacement topological map after a passenger seat unit is either moved, repaired and replaced; and

d. a data input device coupled to the system manager configured to receive a collection of data regarding a passenger, one collection for each passenger, and for correlating each of the collection of data to a passenger seat unit.

42. The automatically configurable in-flight entertainment system as claimed in claim 41 wherein the system manager unit is coupled to the IEEE 1394 network through an ATM switch.