Hybrid in-vehicle infotainment network

• US 8,417,860 B2
• Filed: 08/05/2010
• Issued: 04/09/2013
• Est. Priority Date: 08/05/2010
• Status: Expired due to Fees

• Current Assignee: Honda Motor Co., Ltd. (Honda Motor Company)
• Original Assignee: Honda Motor Co., Ltd. (Honda Motor Company)
• Inventors: Choi, Dave
• Primary Examiner(s): Myers, Paul R
• Application Number:
  US12/851,246
• Publication Number:
  US 20120036297A1
• Time in Patent Office: 978 Days
• Field of Search: 710/100
• US Class Current: 710/100
• 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

Abstract

A hybrid in-vehicle infotainment network includes a core high-speed network having a number of high-speed nodes, each of which may be connected to at least one other high-speed node via a high-speed backbone link. At least some high-speed nodes may be hybrid nodes. Hybrid nodes may communicate with one or more low-speed devices via one or more low-speed links. Each hybrid node, along with any connected low-speed devices, forms a respective local low-speed network. In some embodiments, hybrid nodes may conform with a 1394 specification for high-speed backbone link communications and may conform with a universal serial bus (USB) specification for low-speed link communications. Communications via the high-speed backbone links and the low-speed links may use a common application layer having defined therein a same maximum packet size and a same set of commands and vendor-specific identifiers.

Claims

1. An in-vehicle infotainment network comprising:

a plurality of high-speed nodes connected via at least one high-speed backbone link, the at least one high-speed backbone link being capable of transporting high definition video data between a pair of the plurality of high-speed nodes, at least some of the high-speed nodes comprising;

a low-speed peripheral bus controller for sending first packets to a peripheral device or a repeater device and for receiving second packets from the peripheral device or the repeater device via a low-speed bus, the low-speed bus being capable of transporting low bit rate media data and command-and-control data, and

a high-speed interface controller for sending third packets to one of the plurality of high-speed nodes via a high-speed backbone link of the at least one high-speed backbone link and for receiving fourth packets from the one of the plurality of high-speed nodes via the high-speed backbone link, wherein;

communications via the low-speed bus conform to a first protocol architecture having a first plurality of protocol layers, one of the first plurality of protocol layers being a first application layer,

communications via the high-speed backbone link conform to a second protocol architecture having a second plurality of protocol layers, one of the second plurality of protocol layers being a second application layer,

the second application layer is programmable for a high-speed backbone interface,

the first application layer is programmable for a low-speed interface,

the second application layer and the first application layer are programmed to use a same set of command codes, and

the in-vehicle infotainment network is included within an automobile.

2. The in-vehicle infotainment network of claim 1, wherein

the at least one high-speed backbone link conforms to a 1394 specification.

3. The in-vehicle infotainment network of claim 1, wherein

the low-speed bus is a universal serial bus.

4. The in-vehicle infotainment network of claim 3, wherein

the at least one high-speed backbone link conforms to a 1394 specification.

5. The in-vehicle infotainment network of claim 1, wherein a payload for corresponding command and control data packets is identical with respect to an interface of the at least one high-speed backbone link and an interface of the low-speed bus.

6. The in-vehicle infotainment network of claim 1, wherein

a same set of vendor-specific device identifiers are used with respect to the third packets and the fourth packets being transported via the at least one high-speed backbone link and the first packets and the second packets being transported via the low-speed bus.

7. The in-vehicle infotainment network of claim 1, wherein

the low-speed peripheral bus controller and the high-speed interface controller are configured to have a same maximum payload size.

8. The in-vehicle infotainment network of claim 1, further comprising

a repeater, the repeater having a first low-speed bus connection with a second repeater or with the low-speed peripheral bus controller of one of the at least some high-speed nodes, and the repeater being arranged to have a second connection with either a third repeater or a peripheral device.

9. The in-vehicle infotainment network of claim 1, wherein:

a first protocol used by the low-speed peripheral bus controller is a master/slave type protocol, and

a second protocol used by the high-speed interface controller is a peer-to-peer type protocol.

10. A method of using an infotainment network, the method comprising:

receiving, at a first node of the infotainment network, a first packet from a first device via a low-speed peripheral bus; and

sending a second packet, including first information from the first packet, from the first node to a second node of the infotainment network via a high-speed backbone link, wherein;

communications via the low-speed peripheral bus conform to a first protocol architecture having a first plurality of protocol layers, one of the first plurality of protocol layers being a first application layer,

communications via the high-speed backbone link conform to a second protocol architecture having a second plurality of protocol layers, one of the second plurality of protocol layers being a second application layer,

the second application layer is programmable for a high-speed interface,

the first application layer is programmable for a low-speed interface,

the first application layer and the second application layer are programmed to use a same set of command codes, and

the infotainment network is included within an automobile.

11. The method of claim 10, wherein:

the first device is a third node of the infotainment network, and

the first information originates from a multimedia device.

12. The method of claim 10, wherein the first device includes a multimedia device.

13. The method of claim 10, wherein the communications via the high-speed backbone link conform to an IDB-1394 specification.

14. The method of claim 10, wherein the communications via the low-speed peripheral bus conform to a universal serial bus specification.

15. The method of claim 14, wherein the communications via the high-speed backbone link conform to an IDB-1394 specification.

16. The method of claim 10, wherein a maximum size of a payload for command and control packets of the first application layer defined for the low-speed peripheral bus is equal to a maximum size of a payload for command and control packets of the second application layer defined for the high-speed backbone link.

17. The method of claim 10, wherein a same set of vendor-specific device identifiers are defined for use with the command and control packets of the first application layer and for use with the second application layer.

18. The method of claim 10, wherein the communications via the low-speed peripheral bus conform to a master-slave architecture.

19. The method of claim 18, wherein the communications over the high-speed backbone link conform to a peer-to-peer architecture.

20. The method of claim 10, wherein:

the first node includes a logical universal serial bus device connected to a universal serial bus hub within the first node via a logical low-speed peripheral bus.