Strictly non-blocking switch core having optimized switching architecture based on reciprocity conditions
View Patent ↗A switch core is set forth that comprises a plurality of duplex switches that are interconnected with a interconnection fabric to implement, for example, strictly non-blocking operation of the switch core for reciprocal traffic. In one embodiment, an N-way reciprocal switch is implemented. The N-way reciprocal switch comprises a plurality of duplex switches numbering N of at least a 1×(N−1) switch type (e.g., the duplex switches have at least N−1 ports available for connection to implement the interconnection fabric). The interconnection fabric interconnects the plurality of duplex switches so that each duplex switch is connected to every other duplex switch used in the interconnection fabric by a single connection. A similar an architecture using switches numbering N of at least a 1×N switch type are also set forth. Still further, a plurality of duplex switches are used to implement an (n,m)-way switch that, in turn, can be used to construct a recursive LM-way switch core and/or recursively expand an existing Clos switch core.
1. A method of managing a switch core, comprising:
arranging N duplex switches by connecting each of the N duplex switches to every other of the N duplex switches; and
adapting each of the N duplex switches so loop-back a signal path from at least one port in each of the N duplex switches to the at least one port.
2. The method of claim 1 , wherein adapting each of the N duplex switches to loop-back the signal path comprises arranging optics within each of the N duplex switches to transmit the signal path from the at least one port in each of the N duplex switches to the at least one port.
3. The method of claim 1 , wherein the signal path which is to be looped-back is reciprocal.
4. The method of claim 1 , wherein connecting each of the N duplex switches to every other of the N duplex switches comprises arranging optics within each of the N duplex switches to transmit additional signal paths between ports of the N duplex switches.
5. The method of claim 4 , wherein the additional signal paths are reciprocal.
6. The method of claim 1 , further comprising arranging the N duplex switches to allow signal traffic to flow into and out of the N duplex switches.
7. A switch core, comprising:
N duplex switches, wherein each of the N duplex switches is adapted to be connected to every other of the N duplex switches and at least one port in each of the N duplex switches is adapted to loop-back a signal path from the at least one port to the at least one port.
8. The switch core of claim 7 , wherein the N duplex switches are at least a 1×N switch type.
9. The switch core of claim 7 , further comprising optics within the N duplex switches which are adapted to transmit signals between the ports of the N duplex switches.
10. The switch core of claim 7 , wherein the optics are at least one of actuators, mirrors and lenses.
11. The switch core of claim 7 , wherein the N duplex switches are adapted to allow signal traffic to flow into and out of the N duplex switches.
12. The switch core of claim 7 , wherein the at least one port in each of the N duplex switches is adapted to loop-back a signal path by being adapted to connect the signal path from the at least one port to the at least one port.
13. The switch core of claim 7 , wherein each of the N duplex switches is adapted to be connected to every other of the N duplex switches by being adapted to connect signal path between ports of the N duplex switches.