Method of bus configuration to enable device bridging over dissimilar buses.

• US 20090003245A1
• Filed: 09/08/2008
• Published: 01/01/2009
• Est. Priority Date: 02/28/2003
• Status: Active Grant

• Current Assignee: MaxLinear Communications, LLC (f/k/a Entropic Communications, LLC) (Maxlinear Incorporated)
• Original Assignee: Entropic Communications Incorporated (Maxlinear Incorporated)
• Inventors: Ozturk, Yusuf, Lee, Ronald, Wu, Zong Liang
• Granted Patent: US 7,933,281 B2
• Time in Patent Office: Days
• US Class Current: 370/257
• CPC Class Codes: H04L 12/40078 Bus configuration home automation networks H04L12/2803; arrangements for maintenance or administration H04L41/00
• CPC Class Codes: H04L 12/40091 Bus bridging LAN interconnection over a bridge based backbone H04L12/462; single bridge functionality H04L12/462

Abstract

Several local IEEE1394 buses are bridged together over a second bus type to create a global bus wherein each local bus node is able to address nodes across the global bus without the local nodes being aware of the bridging operation. A bridging device operates by translating local bus node addresses to a global bus for communication over the second bus type. Alternatively, the local bus node identification process is controlled by the bridging device operating as the root node to cause the local nodes to be identified with a node address that is unique for the global network. The second bus type operates as a backbone for the global network and can be any type of communication bus or network with capability to transport the local bus traffic. The bridging devices that interface the local IEEE1394 buses to the backbone contain portals specific to each bus type that can communicate data between the dissimilar buses.

Claims

1. A method of network bridging wherein local nodes within a first sub-network communicate to remote nodes within a second sub-network using unique addresses assigned to each node, where bridge devices perform the interface function between the sub-networks, the method comprising the steps of:

assigning a local address to each local node within a sub-network;

within each sub-network, assigning an address to each remote node;

whereby within each sub-network local nodes and remote nodes are identified with unique addresses.

2. The method of claim 1 wherein the step of assigning an address to each remote node comprises the steps of:

collecting at the bridge device of each sub-network information about remote nodes;

appending the collected information about remote nodes to the address assignment of each local node;

mapping remote node addresses to a virtual local address;

performing another assignment of addresses to each local node within the sub-network that includes remote node address information; and

communicating between local nodes and remote nodes by translating in the bridge device between virtual local addresses and remote node addresses.

3. The method of claim 1 wherein the step of assigning an address to each remote node comprises the steps of:

receiving in a bridge device a list, if a list is available, of remote node addresses;

assigning unique addresses to local nodes that are distinct from all remote node addresses;

transmitting the list of remote node addresses and the unique local node addresses to other bridge devices;

repeating the steps of receiving, assigning, and transmitting addresses until bridge devices of the sub-networks have performed assigning addresses to local nodes;

communicating between local nodes and remote nodes by passing data through bridge devices.

4. The method of claim 1 wherein the first sub-network communicates to the second sub-network over a third network connected between the first and second sub-networks wherein the third network is dissimilar to the first and second sub-networks.