DISCOVERY OF ELECTRONIC DEVICES IN A COMBINED NETWORK

• US 20130326030A1
• Filed: 08/05/2013
• Published: 12/05/2013
• Est. Priority Date: 11/19/2010
• Status: Active Grant

• Current Assignee: Lattice Semiconductor Corporation
• Original Assignee: Silicon Image, Inc. (Lattice Semiconductor Corporation)
• Inventors: Schmidt, Brian K., Detert, Joerg
• Granted Patent: US 8,799,443 B2
• Time in Patent Office: Days
• US Class Current: 709/220
• CPC Class Codes: H04L 41/08 Configuration management of networks or network elements address allocation H04L61/50
• CPC Class Codes: H04L 61/103 across network layers, e.g. resolution of network layer into physical layer addresses or address resolution protocol [ARP]
• CPC Class Codes: H04L 61/106 across networks, e.g. mapping telephone numbers to data network addresses
• CPC Class Codes: H04L 61/5038 for local use, e.g. in LAN or USB networks, or in a controller area network [CAN]
• CPC Class Codes: H04N 21/436 Interfacing a local distribution network, e.g. communicating with another STB or one or more peripheral devices inside the home

Abstract

Embodiments of the invention are generally directed to discovery of electronic devices in a combined network. An embodiment of a method includes determining an identifier for a first device in a combined network according to a first network protocol, the combined network including a first network using the first network protocol and a second network using a second network protocol, where the identifier is determined based on a unique designation for the first device, and determining addressing information for the first device according to the second network protocol, where determining the addressing information includes establishing a physical address and a logical address for the first device. The method further includes broadcasting one or more messages containing identification information and capabilities of the first device to devices in the first network and to devices in the second network. The first device records and processes information from messages received by the first device, the messages being one or more messages under the first network protocol and one or more message under the second network protocol.

Claims

1. A combined network system comprising:

a first network of a combined network having a plurality of electronic devices, the first network operating under a first network protocol;

one or more additional networks of the combined network, each additional network having one or more electronic devices, the one or more additional networks including at least a second network operating under a second network protocol; and

a discovery protocol for discovery of devices in the combined network;

wherein the first network protocol provides for determining a unique identifier based on a unique designation for each device operating under the first network protocol, and wherein the second network protocol provides for determining a physical address and a logical address for each device operating under the second network protocol;

wherein each of the plurality of devices in the first network transmits messages according to the first network protocol providing identification and capability information to each other device in the first network, and wherein each of the one or more devices in the second network transmits messages according to the second network protocol providing identification and capability information to each other device in the second network;

wherein the discovery protocol includes generation by a first device of a listing of the devices in the combined network based on one or more messages received by the first device according to the first network protocol and one or more messages received by the first device according to the second network protocol.

2. The system of claim 1, wherein the physical address and logical address for each device operating under the second network protocol are not unique.

3. The system of claim 2, wherein a device operating under the second network protocol in the second network may be uniquely identified by determining an address for the device, the address being the physical address and the logical address combined, and identifying a relevant address tree for the device.

4. The system of claim 3, wherein the address of the relevant address tree is a unique identification of the first device.

5. The system of claim 1, wherein the first device broadcasts its identification on the first network and on the second network.

6. The system of claim 1, wherein the second network protocol is HDMI™

(High-Definition Multimedia Interface).

7. The system of claim 6, wherein discovery information is broadcast as a vendor specific CEC (Consumer Electronic Control) command.

8. The system of claim 1, wherein a device of the plurality of electronic devices periodically transmits messages according to the first network protocol providing identification and capability information to each other device in the first network.

9. The system of claim 1, wherein a device of the one or more electronic devices in the second network transmits messages according to the second network protocol providing identification and capability information when the network changes.

10. The system of claim 1, wherein the first device records a most recent message received from each device according to the first network protocol and from each device according to the second network protocol.

11. The system of claim 10, wherein the first device records a time each most recent message was received.

12. The system of claim 1, wherein the listing of the devices includes physical layout information.

13. The system of claim 12, wherein the first device and a second device, the first device and the second device both being in the first network, are in a same address tree if the first device receives a second network protocol message from the second device.

14. The system of claim 13, wherein the first device and the second device communicate different kinds of content using the first network and the second network.

15. The system of claim 12, wherein the first device and a second device, the first device and the second device both being in the first network, are in separate address trees if the second device does not receive a second network protocol broadcast from the first device.

16. The system of claim 1, wherein the first device uses the first network protocol and the second network protocol to identify all devices in the combined network.