Dual line monitoring of 1‘protection with auto-switch
AssigneeLucent Technologies Inc.
InventorsDavid E. Einstein, Yung-Ching Sha
Life of this patent
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Abstract
A method and apparatus implementing a “1+1” protection scheme using two interface cards (transmitter and receiver) having a mathematically provable uptime rate.
Claims17
Apparatus, comprising:
- a switch for providing received data traffic from one of a service line and a protection line to an interface device;
- and
- a controller, for causing said switch to alternately select said service and protection lines according to a switch rate selected to provide a minimum system uptime rate.
A system, comprising:
- a switch, for routing received data traffic from one of a service line and a protection line to an interface device according to a determined switching rate, said switching rate determined in accordance with a desired system uptime rate.
In a system comprising a switch for providing received data traffic from one of a service line and a protection line to a single interface device, a method for providing a desired system uptime rate, comprising:
- causing said switch to alternately select said service and protection lines according to a switch rate selected to provide said desired system uptime rate.
In a system comprising a switch for providing received data traffic from one of a service line and a protection line to a single interface device, a method for providing a desired system uptime rate, comprising:
- causing said switch to alternately select said service and protection lines according to a switch rate (S) adapted to provide said desired system uptime rate according to the following equation:
- SUR=1−[(F*R*F)/(2*S)+(F*R*F*R)/Y+S*T]/Y
- wherein F is the average number of signal conditions per line in a year;
- R is the average repair time of a line signal condition once it is detected;
- S is the number of auto-switch operations occurring in a year;
- T is the average switch time of an auto-switch operation;
- U is the system average un-available time;
- Y is the total time in a year.
Dependencies are inferred from the claim text.