Patents by Inventor Philip J. Lin
Philip J. Lin has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 7292747Abstract: 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.Type: GrantFiled: August 8, 2006Date of Patent: November 6, 2007Assignee: Tellabs Operations, Inc.Inventors: Philip J. Lin, Paul E. Green, Jr., Oman A. Gerstel
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Patent number: 7289428Abstract: A communication system (5) comprises a first network (10) including a source (11) arranged to transmit data and a second network (30) including a destination (31) arranged to receive the data. Interruptions in communication between the source and destination are reduced by providing a first primary node (12) and a first secondary node (13) in the first network (10), and a second primary node (32) and a second secondary node (33) in the second network (30). First and second sets of primary routes (14 and 34) and secondary routes (18 and 36) are provided within the first and second networks to facilitate delivery of data to various nodes.Type: GrantFiled: August 13, 2001Date of Patent: October 30, 2007Assignee: Tellabs Operations, Inc.Inventors: Timothy Y. Chow, Philip J. Lin, James D. Mills
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Patent number: 7224861Abstract: 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 architecture using switches numbering N of at least a 1×N switch type are also set forth.Type: GrantFiled: September 23, 2005Date of Patent: May 29, 2007Assignee: Tellabs Operations, Inc.Inventors: Philip J. Lin, Paul E. Green, Jr., Oman A. Gerstel
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Patent number: 7133410Abstract: A method and system for designing a bi-connected ring-based network is provided, which designs from scratch or converts an existing network to a dual-homed ring-based network. The network covers the locations capable of being bi-connected with one or more cycles/rings. The traffic demand is then routed via the cycles, in such a way so as to minimize the amount of network traffic management equipment required.Type: GrantFiled: April 5, 2001Date of Patent: November 7, 2006Assignee: Tellabs Operations, Inc.Inventors: Timothy Y. Chow, Philip J. Lin, James D. Mills
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Patent number: 7110676Abstract: An optical network incorporates one of wavelength based or lightpath link based pre-emphasis to reduce the power fluctuation range at optical receivers in the network. Power output from channel transmitters can be varied on a per channel basis to minimize the effects of non-constant per-channel gain as a function of wavelength. Pre-emphasis circuitry coupled to the transmitters imposes an optical power profile on transmitter output in accordance with an inverse of the gain characteristic of network amplifier elements raised to an exponent which is equal to or less than the number of spans through which an optical signal is transmitted.Type: GrantFiled: February 12, 2002Date of Patent: September 19, 2006Assignee: Tellabs Operations, Inc.Inventors: Weyl K. Wang, Glen P. Koste, Philip J. Lin
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Patent number: 7035502Abstract: An interconnect element incorporates a plurality of smaller, substantially identical, interconnect modules. Multiple identical elements can in turn be combined to form larger interconnect networks. Signal paths in the elements can be implemented with optical fibers or electrical conductors.Type: GrantFiled: August 19, 2004Date of Patent: April 25, 2006Assignee: Tellabs Operations, Inc.Inventor: Philip J. Lin
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Patent number: 6985653Abstract: 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 architecture using switches numbering N of at least a 1×N switch type are also set forth.Type: GrantFiled: July 23, 2004Date of Patent: January 10, 2006Assignee: Tellabs Operations, Inc.Inventors: Philip J. Lin, Paul E. Green, Jr., Ornan A. Gerstel
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Patent number: 6850662Abstract: A reduced component optical switch module includes a plurality of ports wherein each port includes an optical input and an optical output. A plurality of switchable deflectors in combination with a plurality of non-switchable deflectors can be used to establish transmission paths between pairs of ports to support traffic reciprocity. In one embodiment, the ports and switchable elements are configured so as to provide substantially constantly transmission paths within the respective module. In another embodiment, additional deflector elements can be provided to implement loop-back functionality at one or more of the ports.Type: GrantFiled: October 7, 2003Date of Patent: February 1, 2005Assignee: Tellabs Operations, Inc.Inventors: James D. Mills, Philip J. Lin, Roger P. Holmstrom
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Patent number: 6801680Abstract: An interconnect element incorporates a plurality of smaller, substantially identical, interconnect modules. Multiple identical elements can in turn be combined to form larger interconnect networks. Signal paths in the elements can be implemented with optical fibers or electrical conductors.Type: GrantFiled: March 14, 2001Date of Patent: October 5, 2004Assignee: Tellabs Operations, Inc.Inventor: Philip J. Lin
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Patent number: 6785438Abstract: 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 architecture using switches numbering N of at least a 1×N switch type are also set forth.Type: GrantFiled: January 29, 2003Date of Patent: August 31, 2004Assignee: Tellabs Operations, Inc.Inventors: Philip J. Lin, Paul E. Green, Jr., Ornan A. Gerstel
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Publication number: 20040085899Abstract: The present invention provides for a method for reserving spare bandwidth for a link in a communication network including a plurality of links. The method provides for monitoring the volume of traffic routed through each link of the communication network. A single link failure for each link is then simulated and one volume of traffic which would be rerouted through each link for maintaining communication and the volume of traffic removed from each link are determined for each simulated single link failure. The difference between the volume of traffic which would need to be rerouted through each link and the corresponding volume of traffic removed from each link is then computed, and a maximum difference value is determined for each link for all simulated single link failures. An amount of spare bandwidth equivalent to the determined maximum difference is then reserved for each link.Type: ApplicationFiled: June 23, 2003Publication date: May 6, 2004Inventors: Robert B. Magill, Philip J. Lin
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Patent number: 6650804Abstract: A reduced component optical switch module includes a plurality of ports wherein each port includes an optical input and an optical output. A plurality of switchable deflectors in combination with a plurality of non-switchable deflectors can be used to establish transmission paths between pairs of ports to support traffic reciprocity. In one embodiment, the ports and switchable elements are configured so as to provide substantially constantly transmission paths within the respective module. In another embodiment, additional deflector elements can be provided to implement loop-back functionality at one or more of the ports.Type: GrantFiled: January 3, 2002Date of Patent: November 18, 2003Assignee: Tellabs Operations, Inc.Inventors: James D. Mills, Philip J. Lin, Roger P. Holmstrom
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Patent number: 6606297Abstract: The present invention provides for a method for reserving spare bandwidth for a link in a communication network including a plurality of links. The method provides for monitoring the volume of traffic routed through each link of the communication network. A single link failure for each link is then simulated and the volume of traffic which would be rerouted through each link for maintaining communication and the volume of traffic removed from each link are determined for each simulated single link failure. The difference between the volume of traffic which would need to be rerouted through each link and the corresponding volume of traffic removed from each link is then computed, and a maximum difference value is determined for each link for all simulated single link failures. An amount of spare bandwidth equivalent to the determined maximum difference is then reserved for each link.Type: GrantFiled: May 28, 1999Date of Patent: August 12, 2003Assignee: Tellabs Operations, Inc.Inventors: Robert B. Magill, Philip J. Lin
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Publication number: 20030138192Abstract: 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 architecture using switches numbering N of at least a 1×N switch type are also set forth.Type: ApplicationFiled: January 29, 2003Publication date: July 24, 2003Inventors: Philip J. Lin, Paul E. Green, Ornan A. Gerstel
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Patent number: 6591028Abstract: 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 architecture using switches numbering N of at least a 1×N switch type are also set forth.Type: GrantFiled: November 2, 2001Date of Patent: July 8, 2003Assignee: Tellabs Operations, Inc.Inventors: Philip J. Lin, Paul E. Green, Jr., Ornan A. Gerstel
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Publication number: 20030065811Abstract: A method for protecting a mesh network from connection failures includes reviewing, for each link in the mesh network, the single failure scenarios which would require support from the particular link. The method includes determining from these single failure scenarios the worst-case bandwidth required of the particular link to support them and designating this worst-case bandwidth as the capacity for the particular link.Type: ApplicationFiled: September 27, 2002Publication date: April 3, 2003Inventors: Philip J. Lin, Timothy Y. Chow, James D. Mills
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Publication number: 20030031124Abstract: A communication system (5) comprises a first network (10) including a source (11) arranged to transmit data and a second network (30) including a destination (31) arranged to receive the data. [At least one of the first network and the second network is a mesh network.] Interruptions in communication between the source and destination are reduced by providing a first primary node (12) and a first secondary node (13) in the first network (10), and a second primary node (32) and a second secondary node (33) in the second network (30). [A first set] First and second sets of primary routes (14 and 34) and secondary routes (18 and 36) [is] are provided within the first and second networks [network] to facilitate delivery of [a first set of the] data to various nodes. [the first primary node and a second set of the data to the first secondary node.Type: ApplicationFiled: August 13, 2001Publication date: February 13, 2003Inventors: Timothy Y. Chow, Philip J. Lin, James D. Mills
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Publication number: 20030011853Abstract: An optical network incorporates one of wavelength based or lightpath link based pre-emphasis to reduce the power fluctuation range at optical receivers in the network. Power output from channel transmitters can be varied on a per channel basis to minimize the effects of non-constant per-channel gain as a function of wavelength. Pre-emphasis circuitry coupled to the transmitters imposes an optical power profile on transmitter output in accordance with an inverse of the gain characteristic of network amplifier elements raised to an exponent which is equal to or less than the number of spans through which an optical signal is transmitted.Type: ApplicationFiled: February 12, 2002Publication date: January 16, 2003Inventors: Weyl K. Wang, Glen P. Koste, Philip J. Lin
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Publication number: 20020194339Abstract: The present invention relates, by way of illustration, to a telecommunications network that includes a collection of geographically dispersed network elements, called nodes, connected by communication links (e.g., fiber, wireless links). The topology of the network may be an arbitrary mesh. This information may be represented by a graph. For each pair of nodes in the network, a pair of node-disjoint paths between the nodes of minimum total length is computed. One path of each pair is designated to be the working path and the other is designated to be a protection path. Each time there is a traffic demand to be routed on the network from one node A to another node B, the required amount of bandwidth to support the demand is allocated on the working path between A and B. Bandwidth is also allocated along the protection path.Type: ApplicationFiled: May 15, 2002Publication date: December 19, 2002Inventors: Philip J. Lin, Timothy Y. Chow, James D. Mills
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Publication number: 20020171890Abstract: An optical add/drop multiplexer incorporates an integrated receiver module and an integrated transmitter which are interfaced to an intervening electrical network to provide an add/drop/pass-through functionality. The receiver module incorporates a wavelength demultiplexer which is in turn combined with optical/electrical converters PIN photodiodes, and amplifiers on a per wavelength basis to output a plurality of parallel electrical signals in response to a common optical input. The transmitter module combines an integrated plurality of drive circuits and lasers for converting a plurality of parallel input electrical signals to a plurality of optical signals, on a per wavelength basis, which in turn are coupled via an optical wavelength multiplexer to a common output optical fiber. The interconnected electrical network, ring mesh or tree, can provide a reconfigurable electrical add/drop interface to other portions of the network.Type: ApplicationFiled: May 13, 2002Publication date: November 21, 2002Inventors: Philip J. Lin, James D. Mills