EXPANDABLE MULTICAST OPTICAL SWITCH
First Claim
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1. An expandable M×
- N multicast optical switch comprising;
M common ports, N add/drop ports, and L*N upgrade ports, wherein M and N are integers ≧
2, and L is an integer ≧
1;
a non-expandable M×
N multicast optical switch having M ingress ports each coupled to a unique one of the M common ports, and N egress ports; and
N (L+1)×
1 optical couplers each having L+1 entrance ports and one exit port, wherein each one of the optical couplers has one of the entrance ports coupled to a unique one of the N egress ports, and the exit port coupled to a unique one of the N add/drop ports;
wherein each one of the remaining L entrance ports of the N optical couplers is coupled to a unique one of the L*N upgrade ports.
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Abstract
A scalable multicast M×N optical switch (MCS) includes a non-scalable MCS having a plurality of (L+1)×1 selector switches east coupled at one of its L entrance ports to egress ports of the non-scalable MCS, the remaining L−1 entrance ports being coupled to an L*N upgrade ports, where M and N are integers ≧2, and L is an integer ≧1. This allows the scalable MCS to be cascaded in a daisy-chain fashion, providing scalability from the M common ports to L*M common ports. In another embodiment, the selector switches are integrated into the MCS, providing scalability of common MCS ports.
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Citations
20 Claims
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1. An expandable M×
- N multicast optical switch comprising;
M common ports, N add/drop ports, and L*N upgrade ports, wherein M and N are integers ≧
2, and L is an integer ≧
1;a non-expandable M×
N multicast optical switch having M ingress ports each coupled to a unique one of the M common ports, and N egress ports; andN (L+1)×
1 optical couplers each having L+1 entrance ports and one exit port, wherein each one of the optical couplers has one of the entrance ports coupled to a unique one of the N egress ports, and the exit port coupled to a unique one of the N add/drop ports;wherein each one of the remaining L entrance ports of the N optical couplers is coupled to a unique one of the L*N upgrade ports. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 15, 16, 17)
- N multicast optical switch comprising;
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9. An expandable M×
- N multicast optical switch comprising;
M common ports, N add/drop ports, and L*N upgrade ports, wherein M and N are integers ≧
2, and L is an integer ≧
1;N (M+L)×
1 selector optical switches each having M+L entrance ports, and an exit port coupled to a unique one of the N add/drop ports; andan optical splitter coupled to the M common ports, for coupling each of the M common ports to a unique entrance port of each one of the N (M+L)×
1 selector optical switches;wherein each of the remaining L entrance ports of each of the N selector optical switches is coupled to a unique one of the L*N upgrade ports. - View Dependent Claims (10, 11, 12, 13, 14, 18, 19, 20)
- N multicast optical switch comprising;
Specification