# US 7,411,945 B2 · Adaptive router architecture enabling efficient internal communication

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- Number: US 7,411,945 B2
- Document ID: US7411945B2
- Status: Granted
- Kind: B2
- Application number: 11/038,204
- Filed: 2005-01-21
- Published: 2005-08-04
- Granted: 2008-08-12
- Earliest claimed: 2004-02-02
- Assignees: Telefonaktiebolaget LM Ericsson (publ)
- Inventors: Sylvain Monette; Mathieu Giguere; Martin Julien; Benoit Tremblay
- Web page: https://patentgrep.com/patent/US7411945B2

## CPC

- H04L 45/583: {Stackable routers}
- H04L 45/76: Routing in software-defined topologies, e.g. routing between virtual machines
- H04L 49/3009: {Header conversion, routing tables or routing tags}
- H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M)

## Abstract

A router comprising a plurality of elements, each having an element identifier, subdivided into a plurality of groups of at least one element. Each group has a common identifier and each member within each group shares redundant capabilities. Each element is capable of communicating with another element by addressing information to the common identifier instead of the element identifier. Optionally, one element can be a member of more than one group. Another option suggests that all elements within a group share essential information associated with a service provided by the group. Another option is implemented through one element of the router identifying a primary element for a group, wherein the primary element serves requests addressed the corresponding common identifier. Yet another option suggests that one element is identified through configuration of the router as a primary element in its group to serve requests addressed to the common identifier.

## Claims

### Claim 1

A router enabling efficient internal communication comprising:
a plurality of elements each having an element identifier, the plurality of elements being subdivided into a plurality of groups of at least one element, wherein each group has a common identifier and wherein each member within each group shares redundant capabilities, wherein each of the plurality of elements:
communicates with at least another element of the plurality of elements by addressing information to the common identifier instead of the element identifier; and
within at least one of the plurality of groups, more than one elements being available to serve requests addressed to the corresponding common identifier;
a first element:
is identified as a primary element for the group; and
serves requests addressed to the corresponding common identifier; and
a second element:
is subsequently identified dynamically as the primary element for the group while the first element is still available to serve requests addressed to the corresponding common identifier; and
serves requests addressed to the corresponding common identifier.

### Claim 2 (depends on 1)

The router of claim 1, wherein at least one element of the plurality of elements is a member of more than one group of the plurality of groups.

### Claim 3 (depends on 1)

The router of claim 1, wherein all elements within a group of the plurality of groups share amongst themselves essential information associated with a service provided by the group.

### Claim 4 (depends on 1)

The router of claim 1, wherein the first element is identified manually based on internal conditions entered through configuration of the router.

### Claim 5

A method for providing load balancing between a plurality of elements of a router, wherein each of the plurality of elements has an element identifier, the method comprising the steps of:
subdividing the plurality of elements into a plurality of groups of at least one element, each group having a common identifier, wherein a first group has a first common identifier and comprises more than one elements of the plurality of elements sharing redundant capabilities and being available to serve requests addressed to the first common identifier;
identifying a first element as a primary element for the first group;
serving requests addressed to the first common identifier from the first element,
subsequently, dynamically identifying a second element of the first group as the primary element for the first group while the first element is still available to serve requests addressed to the first common identifier; and
serving requests addressed to the first common identifier from the second element.

### Claim 6 (depends on 5)

The method of claim 5, wherein the step of identifying the first element as a primary element for the first group is performed based on internal conditions entered through configuration of the router.