Patents by Inventor John O. Limb
John O. Limb 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: 8654776Abstract: A system and method is provided for scheduling transmissions from a plurality of services operating over a widely distributed communications network. A headend communications device (such as a cable modem termination system) arbitrates bandwidth among a plurality of cable modems configurable for bi-directional communications. The headend grants a bandwidth region to a specified cable modem or assigns contention regions for a group of cable modems. Each cable modem contains a local scheduler that sends requests for bandwidth according to local policies or rules. Upon receipt of a grant from the headend, the local scheduler selects packets to be transmitted to best serve the needs of the services associated with the cable modem. Accordingly, a service requesting bandwidth may not be the service utilizing the grant corresponding to bandwidth request. Nonetheless, the local scheduler manages bandwidth allocation among its local services such that all requesting services eventually receive bandwidth.Type: GrantFiled: May 5, 2011Date of Patent: February 18, 2014Assignee: Broadcom CorporationInventors: Dolors Sala, Ajay Chandra V. Gummalla, John O. Limb, Richard Protus
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Publication number: 20110211479Abstract: A system and method is provided for scheduling transmissions from a plurality of services operating over a widely distributed communications network. A headend communications device (such as a cable modem termination system) arbitrates bandwidth among a plurality of cable modems configurable for bi-directional communications. The headend grants a bandwidth region to a specified cable modem or assigns contention regions for a group of cable modems. Each cable modem contains a local scheduler that sends requests for bandwidth according to local policies or rules. Upon receipt of a grant from the headend, the local scheduler selects packets to be transmitted to best serve the needs of the services associated with the cable modem. Accordingly, a service requesting bandwidth may not be the service utilizing the grant corresponding to bandwidth request.Type: ApplicationFiled: May 5, 2011Publication date: September 1, 2011Applicant: Broadcom CorporationInventors: Dolors SALA, Ajay Chandra V. GUMMALLA, John O. LIMB, Richard PROTUS
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Patent number: 7940774Abstract: A system and method is provided for scheduling transmissions from a plurality of services operating over a widely distributed communications network. A headend communications device (such as a cable modem termination system) arbitrates bandwidth among a plurality of cable modems configurable for bi-directional communications. The headend grants a bandwidth region to a specified cable modem or assigns contention regions for a group of cable modems. Each cable modem contains a local scheduler that sends requests for bandwidth according to local policies or rules. Upon receipt of a grant from the headend, the local scheduler selects packets to be transmitted to best serve the needs of the services associated with the cable modem. Accordingly, a service requesting bandwidth may not be the service utilizing the grant corresponding to bandwidth request. Nonetheless, the local scheduler manages bandwidth allocation among its local services such that all requesting services eventually receive bandwidth.Type: GrantFiled: August 28, 2007Date of Patent: May 10, 2011Assignee: Broadcom CorporationInventors: Dolors Sala, Ajay Chandra V. Gummalla, John O. Limb, Richard Protus
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Publication number: 20100284420Abstract: A two way communication system is adapted for compatible inter-operation of a plurality of devices operating in accordance with a plurality of protocols. The communication system includes a first group of one or more remote devices that interface with a local host in accordance with a first protocol and a second group of one or more remote devices that interface with the local host in accordance with a second protocol. The local host includes a protocol processor that identifies transmissions from the first and second groups of remote devices and routes transmissions from the first group of remote devices to a first processor operating in accordance with the first protocol and also routes transmissions from the second group of remote devices to a second processor operating in accordance with the second protocol.Type: ApplicationFiled: May 17, 2010Publication date: November 11, 2010Applicant: Broadcom CorporationInventors: John O. LIMB, Dolors Sala, Ajay Chandra V. Gummalla, Fred A. Bunn
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Patent number: 7724710Abstract: A wireless communication system is adapted for compatible inter-operation of a plurality of devices operating in accordance with a plurality of protocols. The wireless communication system includes a first group of one or more subscriber stations that interface with a base station in accordance with a first protocol and a second group of one or more subscriber stations that interface with the base station in accordance with a second protocol. The base station includes a protocol processor that identifies transmissions from the first and second groups of subscriber stations and routes transmissions from the first group of subscriber stations to a first processor operating in accordance with the first protocol and routes transmissions from the second group of subscriber stations to a second processor operating in accordance with the second protocol.Type: GrantFiled: May 8, 2007Date of Patent: May 25, 2010Assignee: Broadcom CorporationInventors: John O. Limb, Dolors Sala, Ajay Chandra V. Gummalla, Fred A. Bunn
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Patent number: 7724763Abstract: A wireless communication system is adapted for compatible inter-operation of a plurality of devices operating in accordance with a plurality of protocols. The wireless communication system includes a first group of one or more subscriber stations that interface with a base station in accordance with a first protocol and a second group of one or more subscriber stations that interface with the base station in accordance with a second protocol. The base station includes a protocol processor that identifies transmissions from the first and second groups of subscriber stations and routes transmissions from the first group of subscriber stations to a first processor operating in accordance with the first protocol and routes transmissions from the second group of subscriber stations to a second processor operating in accordance with the second protocol.Type: GrantFiled: May 8, 2007Date of Patent: May 25, 2010Assignee: Broadcom CorporationInventors: John O. Limb, Dolors Sala, Ajay Chandra V. Gummalla, Fred A. Bunn
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Patent number: 7720090Abstract: A two way communication system is adapted for compatible inter-operation of a plurality of devices operating in accordance with a plurality of protocols. The communication system includes a first group of one or more remote devices that interface with a local host in accordance with a first protocol and a second group of one or more remote devices that interface with the local host in accordance with a second protocol. The local host includes a protocol processor that identifies transmissions from the first and second groups of remote devices and routes transmissions from the first group of remote devices to a first processor operating in accordance with the first protocol and also routes transmissions from the second group of remote devices to a second processor operating in accordance with the second protocol.Type: GrantFiled: October 31, 2006Date of Patent: May 18, 2010Assignee: Broadcom CorporationInventors: John O. Limb, Dolors Sala, Ajay Chandra V. Gummalla, Fred A. Bunn
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Patent number: 7660304Abstract: A point-to-multipoint network interface is provided that is simpler and less costly to implement than conventional Ethernet switches. The interface includes a plurality of downstream transmitters for transmitting data packets to a plurality of end user devices, a plurality of downstream receivers for receiving data packets from the plurality of end user devices, an upstream transmitter and an upstream receiver. A multiplexer within the interface multiplexes data packets received from the end user devices into a stream of data packets for transmission to a higher level node regardless of the destination address of the data packets. Conversely, a demultiplexer within the interface demultiplexes a stream of data packets received from the higher level node into individual data packets for selective transmission to one of the plurality of end user devices. The interface can support asymmetrical transmission rates on the upstream and downstream channels between the interface and the end user devices.Type: GrantFiled: March 23, 2006Date of Patent: February 9, 2010Assignee: Broadcom CorporationInventors: Ajay Chandra V. Gummalla, John O. Limb
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Patent number: 7411980Abstract: An optical line terminal (OLT) monitors and controls communications with a plurality of optical nodes (ONs), such as optical network units (ONUs) and/or optical network terminators (ONTs), within a passive optical network (PON), such as, but not exclusively, an Ethernet-based passive optical node (EPON). A tagging mechanism is implemented to identify an origin ON that introduces a frame into the PON segment linking the origin ON with the OLT. The origin ON produces a PON tag to associate its identifier (ON_ID) to the frame. The PON tag facilitates filtering and forwarding operations, and enables the physical layer interface (PHY) to the PON segment to emulate a point-to-point and/or shared communications link. The PON tag allows a MAC control layer to create virtual ports to traffic incoming and outgoing optical signals, and supply the virtual ports to a forwarding entity for frame filtering and forwarding.Type: GrantFiled: December 11, 2002Date of Patent: August 12, 2008Assignee: Broadcom CorporationInventors: Dolors Sala, John O. Limb, Ajay Chandra V. Gummalla
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Patent number: 7349394Abstract: An optical line terminal (OLT) monitors and controls communications with a plurality of optical nodes (ONs), such as optical network units (ONUs) and/or optical network terminators (ONTs), within a passive optical network (PON), such as, but not exclusively, an Ethernet-based passive optical node (EPON). A tagging mechanism is implemented to identify an origin ON that introduces a frame into the PON segment linking the origin ON with the OLT. The origin ON produces a PON tag to associate its identifier (ON_ID) to the frame. The PON tag facilitates filtering and forwarding operations, and enables the physical layer interface (PHY) to the PON segment to emulate a point-to-point and/or shared communications link. The PON tag allows a MAC control layer to create virtual ports to traffic incoming and outgoing optical signals, and supply the virtual ports to a forwarding entity for frame filtering and forwarding.Type: GrantFiled: January 29, 2003Date of Patent: March 25, 2008Assignee: Broadcom CorporationInventors: Dolors Sala, John O. Limb, Ajay Chandra V. Gummalla
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Patent number: 7333495Abstract: A system and method is provided for scheduling transmissions from a plurality of services operating over a widely distributed communications network. A headend communications device (such as a cable modem termination system) arbitrates bandwidth among a plurality of cable modems configurable for bi-directional communications. The headend grants a bandwidth region to a specified cable modem or assigns contention regions for a group of cable modems. Each cable modem contains a local scheduler that sends requests for bandwidth according to local policies or rules. Upon receipt of a grant from the headend, the local scheduler selects packets to be transmitted to best serve the needs of the services associated with the cable modem. Accordingly, a service requesting bandwidth may not be the service utilizing the grant corresponding to bandwidth request. Nonetheless, the local scheduler manages bandwidth allocation among its local services such that all requesting services eventually receive bandwidth.Type: GrantFiled: February 15, 2001Date of Patent: February 19, 2008Assignee: Broadcom CorporationInventors: Dolors Sala, Ajay Chandra V. Gummalla, John O. Limb, Richard Protus
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Patent number: 7245621Abstract: An optical line terminal (OLT) monitors and controls communications with a plurality of optical nodes (ONs), such as optical network units (ONUs) and/or optical network terminators (ONTs), within a passive optical network (PON), such as, but not exclusively, an Ethernet-based passive optical node (EPON). A tagging mechanism is implemented to identify an origin ON that introduces a frame into the PON segment linking the origin ON with the OLT. The origin ON produces a PON tag to associate its identifier (ON_ID) to the frame. The PON tag facilitates filtering and forwarding operations, and enables the physical layer interface (PHY) to the PON segment to emulate a point-to-point and/or shared communications link. The PON tag allows a MAC control layer to create virtual ports to traffic incoming and outgoing optical signals, and supply the virtual ports to a forwarding entity for frame filtering and forwarding.Type: GrantFiled: January 29, 2003Date of Patent: July 17, 2007Assignee: Broadcom CorporationInventors: Dolors Sala, John O. Limb, Ajay Chandra V. Gummalla
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Patent number: 7164690Abstract: A two way communication system is adapted for compatible inter-operation of a plurality of devices operating in accordance with a plurality of protocols. The communication system includes a first group of one or more remote devices that interface with a local host in accordance with a first protocol and a second group of one or more remote devices that interface wit the local host in accordance with a second protocol. The local host includes a protocol processor that identifies transmissions from the first and second groups of remote devices and routes transmissions from the first group of remote devices to a first processor operating in accordance with the first protocol and also routes transmissions from the second group of remote devices to a second processor operating in accordance with the second protocol.Type: GrantFiled: December 26, 2000Date of Patent: January 16, 2007Assignee: Broadcom CorporationInventors: John O. Limb, Dolors Sala, Ajay Chandra V. Gummalla, Fred A. Bunn
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Patent number: 7061877Abstract: A system and method for providing high speed wireless media access is disclosed. A local transceiver is provided, which is capable of transmitting data via a transmit path while receiving a feedback signal via a receive path. The local transmitter is connected to a feedback generator for generating and transmitting a feedback signal in response to receiving data from a wireless transceiver. A feedback detector is also connected to the local transceiver for detecting feedback signals received from other wireless transceivers. When a feedback signal is detected, data associated with the signal is decoded. The wireless transceivers then transmit a feedback signal within the series of wireless transceivers in order to stop the transmission of data until a destination of the data is determined.Type: GrantFiled: September 8, 2000Date of Patent: June 13, 2006Assignee: Georgia Tech Reseach CorporationInventors: Ajay Chandra V. Gummalla, John O. Limb
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Patent number: 7046664Abstract: A point-to-multipoint network interface is provided that is simpler and less costly to implement than conventional Ethernet switches. The interface includes a plurality of downstream transmitters for transmitting data packets to a plurality of end user devices, a plurality of downstream receivers for receiving data packets from the plurality of end user devices, an upstream transmitter and an upstream receiver. A multiplexer within the interface multiplexes data packets received from the end user devices into a stream of data packets for transmission to a higher level node regardless of the destination address of the data packets. Conversely, a demultiplexer within the interface demultiplexes a stream of data packets received from the higher level node into individual data packets for selective transmission to one of the plurality of end user devices. The interface can support asymmetrical transmission rates on the upstream and downstream channels between the interface and the end user devices.Type: GrantFiled: October 17, 2001Date of Patent: May 16, 2006Assignee: Broadcom CorporationInventors: Ajay C Gummalla, John O Limb
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Publication number: 20030152389Abstract: An optical line terminal (OLT) monitors and controls communications with a plurality of optical nodes (ONs), such as optical network units (ONUs) and/or optical network terminators (ONTs), within a passive optical network (PON), such as, but not exclusively, an Ethernet-based passive optical node (EPON). A tagging mechanism is implemented to identify an origin ON that introduces a frame into the PON segment linking the origin ON with the OLT. The origin ON produces a PON tag to associate its identifier (ON_ID) to the frame. The PON tag facilitates filtering and forwarding operations, and enables the physical layer interface (PHY) to the PON segment to emulate a point-to-point and/or shared communications link. The PON tag allows a MAC control layer to create virtual ports to traffic incoming and outgoing optical signals, and supply the virtual ports to a forwarding entity for frame filtering and forwarding.Type: ApplicationFiled: January 29, 2003Publication date: August 14, 2003Applicant: Broadcom CorporationInventors: Dolors Sala, John O. Limb, Ajay Chandra V. Gummalla
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Publication number: 20030137982Abstract: An optical line terminal (OLT) monitors and controls communications with a plurality of optical nodes (ONs), such as optical network units (ONUs) and/or optical network terminators (ONTs), within a passive optical network (PON), such as, but not exclusively, an Ethernet-based passive optical node (EPON). A tagging mechanism is implemented to identify an origin ON that introduces a frame into the PON segment linking the origin ON with the OLT. The origin ON produces a PON tag to associate its identifier (ON_ID) to the frame. The PON tag facilitates filtering and forwarding operations, and enables the physical layer interface (PHY) to the PON segment to emulate a point-to-point and/or shared communications link. The PON tag allows a MAC control layer to create virtual ports to traffic incoming and outgoing optical signals, and supply the virtual ports to a forwarding entity for frame filtering and forwarding.Type: ApplicationFiled: January 29, 2003Publication date: July 24, 2003Applicant: Broadcom Corporation.Inventors: Dolors Sala, John O. Limb, Ajay Chandra V. Gummalla
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Publication number: 20030117998Abstract: An optical line terminal (OLT) monitors and controls communications with a plurality of optical nodes (ONs), such as optical network units (ONUs) and/or optical network terminators (ONTs), within a passive optical network (PON), such as, but not exclusively, an Ethernet-based passive optical node (EPON). A tagging mechanism is implemented to identify an origin ON that introduces a frame into the PON segment linking the origin ON with the OLT. The origin ON produces a PON tag to associate its identifier (ON_ID) to the frame. The PON tag facilitates filtering and forwarding operations, and enables the physical layer interface (PHY) to the PON segment to emulate a point-to-point and/or shared communications link. The PON tag allows a MAC control layer to create virtual ports to traffic incoming and outgoing optical signals, and supply the virtual ports to a forwarding entity for frame filtering and forwarding.Type: ApplicationFiled: December 11, 2002Publication date: June 26, 2003Applicant: Broadcom CorporationInventors: Dolors Sala, John O. Limb, Ajay Chandra V. Gummalla
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Publication number: 20030072304Abstract: A point-to-multipoint network interface is provided that is simpler and less costly to implement than conventional Ethernet switches. The interface includes a plurality of downstream transmitters for transmitting data packets to a plurality of end user devices, a plurality of downstream receivers for receiving data packets from the plurality of end user devices, an upstream transmitter and an upstream receiver. A multiplexer within the interface multiplexes data packets received from the end user devices into a stream of data packets for transmission to a higher level node regardless of the destination address of the data packets. Conversely, a demultiplexer within the interface demultiplexes a stream of data packets received from the higher level node into individual data packets for selective transmission to one of the plurality of end user devices. The interface can support asymmetrical transmission rates on the upstream and downstream channels between the interface and the end user devices.Type: ApplicationFiled: October 17, 2001Publication date: April 17, 2003Applicant: Broadcom CorporationInventors: Ajay Chandra V. Gummalla, John O. Limb
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Publication number: 20010053152Abstract: A system and method is provided for scheduling transmissions from a plurality of services operating over a widely distributed communications network. A headend communications device (such as a cable modem termination system) arbitrates bandwidth among a plurality of cable modems configurable for bi-directional communications. The headend grants a bandwidth region to a specified cable modem or assigns contention regions for a group of cable modems. Each cable modem contains a local scheduler that sends requests for bandwidth according to local policies or rules. Upon receipt of a grant from the headend, the local scheduler selects packets to be transmitted to best serve the needs of the services associated with the cable modem. Accordingly, a service requesting bandwidth may not be the service utilizing the grant corresponding to bandwidth request.Type: ApplicationFiled: February 15, 2001Publication date: December 20, 2001Inventors: Dolors Sala, Ajay Chandra V. Gummalla, John O. Limb, Richard Protus