Transmission apparatus with a function to switch a line in the event of a transmission failure
First Claim
1. A transmission apparatus having a function to switch a line with a redundant configuration comprising a working line and a protection line from said working line to said protection line in the event of a transmission line failure on said working line, said transmission apparatus comprising:
- a cross-connect-classifying means for inputting cross-connect information from an external source and classifying said information into cross-connect categories wherein said cross-connect information includes a signal direction and information requesting a station employing said transmission apparatus to carry out one of the following pieces of processing;
addition of a signal to either said working line or said protection line;
addition of a signal to both said working line and said protection line;
dropping of a signal from either said working line or said protection line;
dropping of a signal from both said working line and said protection line;
passing through of a signal; and
dropping of a signal from either said working line or said protection line and then relaying said signal to either said working line or said protection line;
a communication means for gathering the cross-connect category of each signal-adding or signal-dropping transmission apparatus of a channel and node information identifying said signal-adding or signal-dropping transmission apparatus by communications with an adjacent transmission apparatus for each channel;
a connection-implementation-classifying means for classifying an implementation of a connection between terminals into a corresponding connection category from connection categories corresponding to a variety of implementations of connection in accordance with said gathered cross-connect categories of other transmission apparatuses and the cross-connect category of said transmission apparatus employed in said station to create a table for executing control to switch a line in the event of a failure for each channel;
a failure-reporting means for transmitting information on a failure including node information of said station in the event of said failure on a transmission line between said station and an adjacent station;
a failure-occurrence-location-identifying means for identifying a location of occurrence of a failure from received information on said failure; and
a switching control means for executing control to switch said line based on the location of occurrence of the failure identified by said failure-occurrence-location-identifying means and said table according to said implementation of the connection; and
said implementation of connection between terminals is path-sequence of working lines or protection lines of a signal which is added until the signal is dropped; and
said implementation of connection between terminals is prescribed by cross-connects which are through, drop-and-continue and service selector.
2 Assignments
0 Petitions
Accused Products
Abstract
A transmission apparatus to switch a line from a working line to a protection line in the event of a transmission-line failure on the working line. The transmission apparatus includes a classifying unit inputting cross-connect information from an external source and classifying the information into cross-connect categories for each channel; a communication unit gathering the cross-connect categories of each signal-adding or signal-dropping transmission apparatus of a channel and node information identifying the signal-adding or signal-dropping transmission apparatus by communications with an adjacent transmission apparatus for each channel; and a connection-implementation-classifying unit classifying an implementation of a connection between terminals into a corresponding connection category from among connection categories corresponding to a variety of connection implementations in accordance with gathered cross-connect categories of other transmission apparatuses and the cross connect category of the transmission apparatus employed in the station to create a table for executing control to switch a line in the event of failure for each channel.
13 Citations
18 Claims
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1. A transmission apparatus having a function to switch a line with a redundant configuration comprising a working line and a protection line from said working line to said protection line in the event of a transmission line failure on said working line, said transmission apparatus comprising:
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a cross-connect-classifying means for inputting cross-connect information from an external source and classifying said information into cross-connect categories wherein said cross-connect information includes a signal direction and information requesting a station employing said transmission apparatus to carry out one of the following pieces of processing; addition of a signal to either said working line or said protection line; addition of a signal to both said working line and said protection line; dropping of a signal from either said working line or said protection line; dropping of a signal from both said working line and said protection line; passing through of a signal; and dropping of a signal from either said working line or said protection line and then relaying said signal to either said working line or said protection line; a communication means for gathering the cross-connect category of each signal-adding or signal-dropping transmission apparatus of a channel and node information identifying said signal-adding or signal-dropping transmission apparatus by communications with an adjacent transmission apparatus for each channel; a connection-implementation-classifying means for classifying an implementation of a connection between terminals into a corresponding connection category from connection categories corresponding to a variety of implementations of connection in accordance with said gathered cross-connect categories of other transmission apparatuses and the cross-connect category of said transmission apparatus employed in said station to create a table for executing control to switch a line in the event of a failure for each channel; a failure-reporting means for transmitting information on a failure including node information of said station in the event of said failure on a transmission line between said station and an adjacent station; a failure-occurrence-location-identifying means for identifying a location of occurrence of a failure from received information on said failure; and a switching control means for executing control to switch said line based on the location of occurrence of the failure identified by said failure-occurrence-location-identifying means and said table according to said implementation of the connection; and said implementation of connection between terminals is path-sequence of working lines or protection lines of a signal which is added until the signal is dropped; and said implementation of connection between terminals is prescribed by cross-connects which are through, drop-and-continue and service selector. - View Dependent Claims (2, 3, 4, 5)
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6. A transmission apparatus having a function to switch a line with a redundant configuration comprising a working line and a protection line from said working line to said protection line in the event of a transmission line failure on said working line, said transmission apparatus comprising:
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a cross-connect-classifying means for inputting cross-connect information from an external source and classifying said information into cross-connect categories wherein said cross-connect information includes a signal direction and information requesting a station employing said transmission apparatus to carry out one of the following pieces of processing; addition of a signal to either said working line or said protection line; addition of a signal to both said working line and said protection line; dropping of a signal from either said working line or said protection line; dropping of a signal from both said working line and said protection line; passing through of a signal; and dropping of a signal from either said working line or said protection line and then relaying said signal to either said working line or said protection line; a communication means for gathering, the cross-connect category of each signal-adding or signal-dropping transmission apparatus of a channel and node information identifying said signal-adding or signal-dropping transmission apparatus by communications with an adjacent transmission apparatus for each channel; a connection-implementation-classifying means for classifying an implementation of a connection between terminals into a corresponding connection category from connection categories corresponding to a variety of connection implementations in accordance with said gathered cross-connect categories of other transmission apparatuses and the cross-connect category of said transmission apparatus employed in said station to create a table for executing control to switch a line in the event of a failure for each channel; a failure-reporting means for transmitting information on a failure including node information of said station in the event of said failure on a transmission line between said station and an adjacent station; a failure-occurrence-location-identifying means for identifying a location of occurrence of a failure from received information on said failure; and a switching control means for executing control to switch said line based on the location of occurrence of the failure identified by said failure-occurrence-location-identifying means and said table according to said implementation of the connection; wherein said communication means comprising; a first station-determining means for determining that said station is an end station for only adding or dropping a signal, a through station for relaying a signal or an intermediate station for dropping a signal as well as relaying said signal for each channel on the basis of said cross-connect information; a first transfer means for receiving a cross-connect category and node information, storing said cross-connect category and said node information in a stack and transferring said cross-connect category and said node information; a second station-judging means, which is used for forming a judgment as to whether said station is a transmitting station transmitting said cross-connect category first or a receiving station transmitting said cross-connect category last on the basis of the direction of said signal when said station is determined to be said end station; a first transmission means, which is used for acquiring a transmission right first, transmitting said cross-connect category and said node information of said station to an adjacent station and handing over said transmission right to said adjacent station when said station is judged to be said transmitting station; a second transfer means, which is used for transferring said transmission right to be handed over to said adjacent station when said station is determined to be said through station; a second transmission means, which is used for acquiring a transmission right handed over to said station, transmitting said cross-connect category and said node information of said station to an adjacent station and handing over said transmission right to said adjacent station when said station is determined to be said intermediate station; and a third transmission means, which is used for acquiring a transmission right handed over to said station and transmitting said cross-connect category as well as said node information of said station to an adjacent station when said station is judged to be said receiving station. - View Dependent Claims (7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A transmission apparatus having a function to switch a line with a redundant configuration comprising a working line and a protection line from said working line to said protection line in the event of a transmission line failure on said working line, said transmission apparatus comprising:
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a cross-connect-classifying means for inputting cross-connect information from an external source and classifying said information into cross-connect categories wherein said cross-connect information includes a signal direction and information requesting a station employing said transmission apparatus to carry out one of the following pieces of processing; addition of a signal to either said working line or said protection line; addition of a signal to both said working line and said protection line; dropping of a signal from either said working line or said protection line; dropping of a signal from both said working line and said protection line; passing through of a signal; and dropping of a signal from either said working line or said protection line and then relaying said signal to either said working line or said protection line; a communication means for gathering the cross-connect category of each signal-adding or signal-dropping transmission apparatus of a channel and node information identifying said signal-adding or signal-dropping transmission apparatus by communications with an adjacent transmission apparatus for each channel; a connection-implementation-classifying means for classifying an implementation of a connection between terminals into a corresponding connection category from connection categories corresponding to a variety of connection implementations in accordance with said gathered cross-connect categories of other transmission apparatuses and the cross-connect category of said transmission apparatus employed in said station to create a table for executing control to switch a line in the event of a failure for each channel; a failure-reporting means for transmitting information on a failure including node information of said station in the event of said failure on a transmission line between said station and an adjacent station; a failure-occurrence-location-identifying means for identifying a location of occurrence of a failure from received information on said failure; and a switching control means for executing control to switch said line based on the location of occurrence of the failure identified by said failure-occurrence-location-identifying means and said table according to said implementation of the connection; wherein, for each channel, said connection implementation-classifying means creates a RIP (Routing Interworking Protection) table including node information of a station adding a signal, dropping a signal or relaying after dropping a signal, and path information for an implementation of connection. - View Dependent Claims (17, 18)
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Specification