US6430150B1 — Communication node, restoration method and commun…

Claim 1

Independent Claim 122 words

A restoration method in a telecommunication network in which each node is provided with physical topology information relating to a physical construction of telecommunication paths included in the entire telecommunication network and logical topology information relating to routing of telecommunication paths included in the entire telecommunication network, said restoration method comprising the steps of: (a) broadcasting information relating to a failure that has occurred in the telecommunication network, throughout the network; (b) in each node that has received said information relating to the failure, determining alternate paths for bypassing the failure using said information relating to the failure, said physical topology information, and said logical topology information; and (c) in each node, switching services to the alternate paths determined in step (b).

Claim 2

Dependent Claim 122 words

A restoration method in a telecommunication network in which each node is provided with physical topology information relating to a physical construction of telecommunication paths included in the entire telecommunication network and logical topology information relating to routing of telecommunication paths included in the entire telecommunication network, said restoration method comprising the steps of: (a) broadcasting information relating to a failure that has occurred in the telecommunication network, throughout the network; (b) in each node that has received said information relating to the failure, determining alternate paths for bypassing the failure using said information relating to the failure, said physical topology information, and said logical topology information; and (c) in each node, switching services to the alternate paths determined in step (b).

Claim 3

Dependent Claim 62 words

The restoration method as claimed in claim 1 , further comprising the step of: (d) initializing the step (b) when information relating to another failure is received while the step (b) is being executed, within a predetermined guard time, and executing the step (b) again allowing for the information relating to said another failure so that most up-to-date alternate paths are determined.

Claim 4

Dependent Claim 52 words

The restoration method as claimed in claim 1 , further comprising the step of: (e) exchanging between nodes data relating to said physical topology information and said logical topology information at predetermined timings so that the nodes are always provided with the same physical topology information and the same logical topology information.

Claim 5

Dependent Claim 114 words

A restoration method in a telecommunication network in which each node is provided with physical topology information relating to a physical construction of telecommunication paths included in the entire telecommunication network and logical topology information relating to routing of telecommunication paths included in the entire telecommunication network, said restoration method comprising the steps of: (a) determining by computation in each node and storing in each node alternate paths adapted for typical failures prior to an actual failure; (b) broadcasting information relating to a failure that has occurred in the telecommunication network, throughout the network; and (c) in each node switching services to the alternate paths determined prior to the actual failure in step (a).

Claim 6

Dependent Claim 114 words

A restoration method in a telecommunication network in which each node is provided with physical topology information relating to a physical construction of telecommunication paths included in the entire telecommunication network and logical topology information relating to routing of telecommunication paths included in the entire telecommunication network, said restoration method comprising the steps of: (a) determining by computation in each node and storing in each node alternate paths adapted for typical failures prior to an actual failure; (b) broadcasting information relating to a failure that has occurred in the telecommunication network, throughout the network; and (c) in each node switching services to the alternate paths determined prior to the actual failure in step (a).

Claim 7

Dependent Claim 40 words

The restoration method as claimed in claim 4 , wherein said telecommunication network is an asynchronous transfer mode network based on a concept of virtual paths, and zero-capacity alternate virtual paths are set in step (a) as the alternate paths.

Claim 8

Dependent Claim 53 words

The restoration method as claimed in claim 1 , further comprising the step of: (d) identifying the type of failure by referring to the information relating to the failure and received by each node; wherein alternate path selection adapted for the type of failure identified in step (g) is employed in step (b).

Claim 9

Dependent Claim 107 words

A telecommunication node provided with physical topology information relating to a physical construction of all telecommunication paths included in the entire telecommunication network and logical topology information relating to routing of said telecommunication paths included in the entire telecommunication network, said telecommunication node comprising: first means for broadcasting information relating to a failure that has occurred in the telecommunication network, throughout the telecommunication network; second means for determining alternate paths for bypassing the failure using said information relating to the failure, said physical topology information, and said logical topology information; and third means switching services in each node to the alternate paths determined by said second means.

Claim 10

Dependent Claim 107 words

A telecommunication node provided with physical topology information relating to a physical construction of all telecommunication paths included in the entire telecommunication network and logical topology information relating to routing of said telecommunication paths included in the entire telecommunication network, said telecommunication node comprising: first means for broadcasting information relating to a failure that has occurred in the telecommunication network, throughout the telecommunication network; second means for determining alternate paths for bypassing the failure using said information relating to the failure, said physical topology information, and said logical topology information; and third means switching services in each node to the alternate paths determined by said second means.

Claim 11

Dependent Claim 70 words

The telecommunication node as claimed in claim 7 , further comprising fourth means initializing a process in said second means when information relating to another failure is received while the alternate paths are being determined by said second means, within a predetermined guard time, and executing the process in said second means again allowing for the information relating to said another failure so that most up-to-date alternate paths are determined.

Claim 12

Dependent Claim 50 words

The telecommunication node as claimed in claim 7 , further comprising fifth means exchanging between nodes data relating to said physical topology information and said logical topology information at predetermined timings so that the nodes are always provided with the same physical topology information and the same logical topology information.

Claim 13

Dependent Claim 63 words

The telecommunication node as claimed in claim 7 , further comprising sixth means determining by computation and storing alternate paths adapted for typical failures prior to an actual failure; wherein the process in said second means is not executed when a typical failure occurs, and said third means is used to switch services to the alternate paths determined prior to the actual failure.

Claim 14

Dependent Claim 41 words

The telecommunication node as claimed in claim 10 , wherein said telecommunication network is an asynchronous transfer mode network based on a concept of virtual paths, and zero-capacity alternate virtual paths are set by said sixth means as the alternate paths.

Claim 15

Dependent Claim 53 words

The telecommunication node as claimed in claim 7 , further comprising seventh means identifying the type of failure by referring to the information relating to the failure an receive by each node; wherein alternate path selection adapted for the type of failure identified by said seventh means is employed by said second means.

Claim 16

Dependent Claim 107 words

A telecommunication network including telecommunication nodes each provided with physical topology information relating to a physical construction of telecommunication paths included in the entire telecommunication network and logical topology information relating to routing of telecommunication paths included in the entire telecommunication network, wherein each node comprises: first means broadcasting information relating to a failure that has occurred in the telecommunication network, throughout the telecommunication network; second means determining alternate paths for bypassing the failure using said information relating to the failure, said physical topology information, and said logical topology information; and third means switching services in each node to the alternate paths determined by said second means.

Claim 17

Dependent Claim 107 words

A telecommunication network including telecommunication nodes each provided with physical topology information relating to a physical construction of telecommunication paths included in the entire telecommunication network and logical topology information relating to routing of telecommunication paths included in the entire telecommunication network, wherein each node comprises: first means broadcasting information relating to a failure that has occurred in the telecommunication network, throughout the telecommunication network; second means determining alternate paths for bypassing the failure using said information relating to the failure, said physical topology information, and said logical topology information; and third means switching services in each node to the alternate paths determined by said second means.

Claim 18

Dependent Claim 119 words

A restoration method in a telecommunication network comprising the steps of: (a) providing each node with similar physical topology information relating to a physical construction of telecommunication paths included in the entire telecommunication network and providing logical topology information relating to routing of telecommunication paths included in the entire telecommunication network; (b) broadcasting information relating to a failure that has occurred in the telecommunication network, throughout the network; (c) in each node that has received said information relating to the failure, determining alternate paths for bypassing the failure using said information relating to the failure, said physical topology information, and said logical topology information; and (d) switching services in each node to the alternate paths determined in step (c).

Claim 19

Dependent Claim 119 words

A restoration method in a telecommunication network comprising the steps of: (a) providing each node with similar physical topology information relating to a physical construction of telecommunication paths included in the entire telecommunication network and providing logical topology information relating to routing of telecommunication paths included in the entire telecommunication network; (b) broadcasting information relating to a failure that has occurred in the telecommunication network, throughout the network; (c) in each node that has received said information relating to the failure, determining alternate paths for bypassing the failure using said information relating to the failure, said physical topology information, and said logical topology information; and (d) switching services in each node to the alternate paths determined in step (c).

Claim 20

Dependent Claim 112 words

A telecommunication node comprising: storing means provided with physical topology information relating to a physical construction of telecommunication paths included in an entire telecommunication network and logical topology information relating to routing of telecommunication paths included in the entire telecommunication network, said informations being similar at each node in said network; first means broadcasting information relating to a failure that has occurred in the telecommunication network, throughout the telecommunication network; second means determining alternate paths for bypassing the failure using said information relating to the failure, said physical topology information, and said logical topology information; and third means switching services in each node to the alternate paths determined by said second means.

Claim 21

Dependent Claim 112 words

A telecommunication node comprising: storing means provided with physical topology information relating to a physical construction of telecommunication paths included in an entire telecommunication network and logical topology information relating to routing of telecommunication paths included in the entire telecommunication network, said informations being similar at each node in said network; first means broadcasting information relating to a failure that has occurred in the telecommunication network, throughout the telecommunication network; second means determining alternate paths for bypassing the failure using said information relating to the failure, said physical topology information, and said logical topology information; and third means switching services in each node to the alternate paths determined by said second means.

Claim 22

Dependent Claim 111 words

A telecommunication network including telecommunication nodes, each said node comprising: storing means provided with similar physical topology information relating to a physical construction of telecommunication paths included in the entire telecommunication network and similar logical topology information relating to routing of telecommunication paths included in the entire telecommunication network; first means broadcasting information relating to failure that has occurred in the telecommunication network, throughout the telecommunication network; second means determining alternate paths for bypassing the failure using said information relating to the failure, said similar physical topology information, and said similar logical topology information; and third means switching services in each node to the alternate paths determined by said second means.

Claim 23

Dependent Claim 111 words

A telecommunication network including telecommunication nodes, each said node comprising: storing means provided with similar physical topology information relating to a physical construction of telecommunication paths included in the entire telecommunication network and similar logical topology information relating to routing of telecommunication paths included in the entire telecommunication network; first means broadcasting information relating to failure that has occurred in the telecommunication network, throughout the telecommunication network; second means determining alternate paths for bypassing the failure using said information relating to the failure, said similar physical topology information, and said similar logical topology information; and third means switching services in each node to the alternate paths determined by said second means.

Annuity Stage	Window Opens	Payment Deadline	Surcharge Period Until	Estimated Fee	Status
3.5 Years (Year 4)	2005-08-05	2006-02-04	2006-08-06	$2000.00	Window Closed / Lapsed
7.5 Years (Year 8)	2009-08-05	2010-02-04	2010-08-06	$3760.00	Window Closed / Lapsed
11.5 Years (Year 12)	2013-08-05	2014-02-04	2014-08-06	$7700.00	Window Closed / Lapsed

Communication node, restoration method and communication network

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