VEHICLE NETWORK LINK MODULE

• US 20120106544A1
• Filed: 06/29/2011
• Published: 05/03/2012
• Est. Priority Date: 11/03/2010
• Status: Active Grant

• Current Assignee: Avago Technologies International Sales Pte Limited (Broadcom, Inc.)
• Original Assignee: Broadcom Corporation (Broadcom, Inc.)
• Inventors: YOUSEFI, NARIMAN, KIM, YONGBUM, WALLEY, JOHN, CHEN, SHERMAN (XUEMIN), DIAB, WAEL W., ILYADIS, NICHOLAS
• Granted Patent: US 8,929,198 B2
• Time in Patent Office: Days
• US Class Current: 370/355
• CPC Class Codes: B60L 50/00 Electric propulsion with power supplied within the vehicle with power supply from force of nature, e.g. sun or wind, B60L8/00; for monorail vehicles, suspension vehicles or rack railways B60L13/00
• CPC Class Codes: B60R 16/023 for transmission of signals between vehicle parts or subsystems
• CPC Class Codes: B60R 16/03 for supply of electrical power to vehicle subsystems or for circuit arrangements for charging batteries H02J7/00
• CPC Class Codes: B60R 16/0315 using multiplexing techniques multiplexing for transmission of signals G08C15/00; multiplexing for electrical communication in general H04J
• CPC Class Codes: B60R 19/03 characterised by material, e.g. composite B60R19/18 takes precedence
• CPC Class Codes: G06F 1/26 Power supply means, e.g. regulation thereof for memories G11C
• CPC Class Codes: G06F 1/266 Arrangements to supply power to external peripherals either directly from the computer or under computer control, e.g. supply of power through the communication port, computer controlled power-strips
• CPC Class Codes: G06F 13/4022 using switching circuits, e.g. switching matrix, connection or expansion network G06F13/4009 takes precedence
• CPC Class Codes: G06F 7/76 Arrangements for rearranging, permuting or selecting data according to predetermined rules, independently of the content of the data
• CPC Class Codes: G07C 5/008 communicating information to a remotely located station transmission systems for measured values G08C
• CPC Class Codes: G07C 5/085 using electronic data carriers
• CPC Class Codes: G07C 5/0866 the electronic data carrier being a digital video recorder in combination with video camera
• CPC Class Codes: G08G 1/16 Anti-collision systems road vehicle drive control systems for predicting or avoiding probable or impending collision otherwise than by control of a particular sub-unit B60W30/08
• CPC Class Codes: H04B 1/3822 specially adapted for use in vehicles H04B1/3827 takes precedence
• CPC Class Codes: H04L 12/10 Current supply arrangements
• CPC Class Codes: H04L 12/46 Interconnection of networks
• CPC Class Codes: H04L 12/4625 Single bridge functionality, e.g. connection of two networks over a single bridge
• CPC Class Codes: H04L 12/56 Packet switching systems
• CPC Class Codes: H04L 45/74 Address processing for routing
• CPC Class Codes: H04L 47/2433 Allocation of priorities to traffic types
• CPC Class Codes: H04L 47/6275 : based on priority
• CPC Class Codes: H04L 47/76 : using dynamic resource allocation, e.g. in-call renegotiation requested by the user or requested by the network in response to changing network conditions
• CPC Class Codes: H04L 47/821 : Prioritising resource allocation or reservation requests
• CPC Class Codes: H04L 49/25 : Routing or path finding in a switch fabric
• CPC Class Codes: H04L 67/12 : specially adapted for proprietary or special-purpose networking environments, e.g. medical networks, sensor networks, networks in vehicles or remote metering networks
• CPC Class Codes: H04L 69/08 : Protocols for interworking; Protocol conversion
• CPC Class Codes: H04L 69/22 : Parsing or analysis of headers
• CPC Class Codes: H04N 19/102 : characterised by the element, parameter or selection affected or controlled by the adaptive coding
• CPC Class Codes: H04N 7/181 : for receiving images from a plurality of remote sources
• CPC Class Codes: H04N 7/183 : for receiving images from a single remote source
• CPC Class Codes: H04W 24/08 : Testing, supervising or monitoring using real traffic
• CPC Class Codes: H04W 28/08 : Load balancing or load distribution transferring a connection for handling the traffic H04W36/22; wireless traffic scheduling H04W72/12
• CPC Class Codes: H04W 4/40 : for vehicles, e.g. vehicle-to-pedestrians [V2P]
• CPC Class Codes: H04W 4/44 : for communication between vehicles and infrastructures, e.g. vehicle-to-cloud [V2C] or vehicle-to-home [V2H]
• CPC Class Codes: H04W 4/46 : for vehicle-to-vehicle communication [V2V]
• CPC Class Codes: H04W 72/02 : Selection of wireless resources by user or terminal
• CPC Class Codes: H04W 72/541 : using the level of interference
• CPC Class Codes: H04W 72/56 : based on priority criteria
• CPC Class Codes: H04W 88/02 : Terminal devices
• CPC Class Codes: Y02D 30/70 : in wireless communication networks
• CPC Class Codes: Y04S 40/18 : Network protocols supporting networked applications, e.g. including control of end-device applications over a network

Abstract

A vehicle network link module includes network fabric ports, a port, a switching circuit, and a link manager. The network fabric ports are operable for coupling to corresponding network fabric ports of another vehicle network fabric link module. The port is operable for coupling to a port of a vehicle network module. The switching circuit is operable to connect an active network fabric port to the port. The link manager determines whether vehicle network packet conveyance via the active network fabric port has degenerated below a threshold. When the vehicle network packet conveyance has degenerated below a threshold, the link manager determines use mode of the active network fabric port. The link manager processing module then selects a new active network fabric port based on the use mode. The link manager then activates the new active network fabric port for coupling via the switching circuit to the port.

Claims

1. A vehicle network link module comprises:

a plurality of network fabric ports operable for coupling to a corresponding plurality of network fabric ports of another vehicle network fabric link module;

a port operable for coupling to a port of a vehicle network module;

a switching circuit operable to connect an active network fabric port of the plurality of network fabric ports to the port; and

a link manager processing module operable to;

determine whether vehicle network packet conveyance via the active network

fabric port has degenerated below a threshold;

when the vehicle network packet conveyance has degenerated below a threshold;

determine use mode of the active network fabric port;

select a new active network fabric port from the plurality of network fabric ports based on, at least in part, the use mode; and

activate the new active network fabric port for coupling via the switching circuit to the port.

2. The vehicle network link module of claim 1, wherein the link manager processing module further functions to:

determine that a communication medium coupling the active network fabric port to a corresponding active network fabric port of the other vehicle network fabric link module has failed;

determine the use mode of the active network fabric port to be a link aggregation mode;

determine whether a hot-standby port of the plurality of network fabric ports is enabled for the active network fabric port;

when the hot-standby port is enabled;

enable the switching circuit to disconnect the active network fabric port from the port and connect the new active network fabric port to the port for the link aggregation mode; and

establish a new hot-standby port of the plurality of network fabric ports for the new active network fabric port.

3. The vehicle network link module of claim 2, wherein the link manager processing module further functions to:

when the hot-standby port is not enabled;

determine whether conveyance of a vehicle network packet was corrupted when the vehicle network packet conveyance has degenerated below the threshold; and

when the conveyance of the vehicle network packet was corrupted;

determine content type of the vehicle network packet;

determine network traffic conditions;

based on the content type and network traffic conditions, determine whether to initiate reconveyance the vehicle network packet.

4. The vehicle network link module of claim 1, wherein the link manager processing module further functions to:

determine that a communication medium coupling the active network fabric port to a corresponding active network fabric port of the other vehicle network fabric link module has failed;

determine the use mode of the active network fabric port to be a non-aggregation mode;

determine whether a hot-standby port of the plurality of network fabric ports is enabled for the active network fabric port;

when the hot-standby port is enabled;

enable the switching circuit to disconnect the active network fabric port from the port and connect the new active network fabric port to the port for the non-aggregation mode;

establish a new hot-standby port of the plurality of network fabric ports for the new active network fabric port; and

when the hot-standby port is not enabled;

determine whether conveyance of a vehicle network packet was corrupted when the vehicle network packet conveyance has degenerated below the threshold; and

when the conveyance of the vehicle network packet was corrupted;

determine content type of the vehicle network packet;

determine network traffic conditions;

based on the content type and network traffic conditions, determine whether to initiate reconveyance of the vehicle network packet.

5. The vehicle network link module of claim 1, wherein the link manager processing module further functions to:

determine that the vehicle network packet conveyance has degenerated below the threshold due to data bandwidth of a communication medium coupling the active network fabric port to a corresponding active network fabric port of the other vehicle network fabric link module being below a desired data bandwidth level; and

change the use mode to an aggregation mode such that the active network fabric port and the new active network port are coupled to the port via the switching circuit for aggregate packet transmissions.

6. The vehicle network link module of claim 1, wherein the link manager processing module further functions to determine whether vehicle network packet conveyance has degenerated below the threshold by at least one of:

determining that a communication medium coupling the active network fabric port to a corresponding active network fabric port of the other vehicle network fabric link module is broken;

determining that the communication medium coupling the active network fabric port to the corresponding active network fabric port of the other vehicle network fabric link module has an undesired bit error rate; and

determining that the communication medium coupling the active network fabric port to the corresponding active network fabric port of the other vehicle network fabric link module has a data bandwidth below a desired data bandwidth level.

7. The vehicle network link module of claim 1, wherein the link manager processing module further functions to:

for each of the plurality of network fabric ports;

testing a communication medium coupling a network fabric port of the plurality of network fabric ports to a corresponding network fabric port of the other vehicle network fabric link module to produce port test information; and

compiling a performance history based on the port test information; and

select the active network fabric port based on, at least in part, the performance history of each of the plurality of network fabric ports.

8. The vehicle network link module of claim 1, wherein the port comprises:

one or more ingress ports; and

one or more egress ports.

9. A vehicle network link module comprises:

a first plurality of network fabric ports operable for coupling to a first corresponding plurality of network fabric ports of a first other vehicle network fabric link module;

a second plurality of network fabric ports operable for coupling to a second corresponding plurality of network fabric ports of a second other vehicle network fabric link module;

a port operable for coupling to a port of a vehicle network module;

a switching module operable to connect the port to an active network fabric port of the first plurality of network fabric ports; and

a link manager processing module operable to;

determine a link configuration change condition;

determine a spanning tree configuration from a plurality of pre-determined spanning tree configurations based on the link configuration change condition;

enable the switching module operable to connect the port to a new active network fabric port of the second plurality of network fabric ports in accordance with the spanning tree configuration; and

deactivate the active network port from the port in accordance with the spanning tree configuration.

10. The vehicle network link module of claim 9, wherein the link manager processing module further functions to determine the link configuration change condition by at least one of:

detecting a hardware failure of the first plurality of network fabric ports;

detecting a software failure of the first plurality of network fabric ports;

detecting failure of a first switching circuit of the switching module, wherein the first switching module provides coupling of the port to the active network fabric port;

receive a message regarding the link configuration change condition from a network manager.

11. The vehicle network link module of claim 9 further comprises:

a network topology database for storing the plurality of pre-determined spanning tree configurations; and

wherein the link manager processing module is further operable to;

receiving updated spanning tree configuration information; and

update the network topology database in accordance with the updated spanning tree configuration information.

12. The vehicle network link module of claim 9 further comprises:

a network topology database for storing the plurality of pre-determined spanning tree configurations; and

wherein the link manager processing module is further operable to update the network topology database to indicate that a spanning tree configuration of the plurality of pre-determined spanning tree configurations that includes a link associated with the active network port is inactive.

13. The vehicle network link module of claim 9, wherein the link manager processing module further functions to:

for each of the first plurality of network fabric ports;

testing a communication medium coupling a network fabric port of the first plurality of network fabric ports to a corresponding network fabric port of the first other vehicle network fabric link module to produce port test information; and

compiling a performance history based on the port test information; and

select the active network fabric port based on, at least in part, the performance history of each of the first plurality of network fabric ports.

14. The vehicle network link module of claim 9, wherein the switching module comprises:

a first switching circuit, when enabled, is operable to connect the port to one of the first plurality of network fabric ports; and

a second switching circuit, when enabled, is operable to connect the port to one of the second plurality of network fabric ports.

15. The vehicle network link module of claim 9, wherein the port comprises:

one or more ingress ports; and

one or more egress ports.

16. A vehicle network link module comprises:

a first plurality of network fabric ports operable for coupling to a first corresponding plurality of network fabric ports of a first other vehicle network fabric link module;

a second plurality of network fabric ports operable for coupling to a second corresponding plurality of network fabric ports of a second other vehicle network fabric link module;

a port operable for coupling to a port of a vehicle network module;

a switching module operable to connect the port to an active network fabric port of the first plurality of network fabric ports; and

a link manager processing module operable to;

determine whether a link configuration change condition has occurred;

determine whether vehicle network packet conveyance degeneration has occurred;

when the link configuration change condition has occurred, execute link configuration change function; and

when the vehicle network packet conveyance degeneration has occurred, execute a packet conveyance change function.

17. The vehicle network link module of claim 16, wherein the link manager processing module further functions to execute the link configuration change function by:

determining a spanning tree configuration from a plurality of pre-determined spanning tree configurations based on the link configuration change condition;

enabling the switching module operable to connect the port to a new active network fabric port of the second plurality of network fabric ports in accordance with the spanning tree configuration; and

deactivating the active network port from the port in accordance with the spanning tree configuration.

18. The vehicle network link module of claim 16, wherein the link manager processing module further functions to execute the packet conveyance change function by:

determining use mode of the active network fabric port;

selecting a new active network fabric port from the first plurality of network fabric ports based on, at least in part, the use mode; and

activating the new active network fabric port for coupling via the switching circuit to the port.

19. The vehicle network link module of claim 16, wherein the switching module comprises:

a first switching circuit, when enabled, is operable to connect the port to one of the first plurality of network fabric ports; and

a second switching circuit, when enabled, is operable to connect the port to one of the second plurality of network fabric ports.

20. The vehicle network link module of claim 16, wherein the port comprises:

one or more ingress ports; and

one or more egress ports.