Patents by Inventor David Elie-Dit-Cosaque
David Elie-Dit-Cosaque 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: 9774490Abstract: A system and method for propagating fault information in an Ethernet OAM network having multiple levels of OAM domains. An Alarm Indication and Suppression (AIS) frame is generated by a Maintenance Intermediate Point (MIP) node upon detecting a fault condition in a first OAM domain, which is transmitted to one or more Maintenance End Points (MEPs) of the first OAM domain. Upon receiving the AIS frames, the MEP nodes are operable generate another AIS frame for propagating to an adjacent higher level second OAM domain. Responsive to the AIS frame from the lower level first OAM domain, any alarms caused in the second OAM domain due to the fault condition in the first OAM domain are suppressed.Type: GrantFiled: April 14, 2014Date of Patent: September 26, 2017Assignee: Alcatel LucentInventors: David Elie-Dit-Cosaque, Kamakshi Sridhar, Maarten Petrus Joseph Vissers, Tony van Kerckhove
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Publication number: 20140219106Abstract: A system and method for propagating fault information in an Ethernet OAM network having multiple levels of OAM domains. An Alarm Indication and Suppression (AIS) frame is generated by a Maintenance Intermediate Point (MIP) node upon detecting a fault condition in a first OAM domain, which is transmitted to one or more Maintenance End Points (MEPs) of the first OAM domain. Upon receiving the AIS frames, the MEP nodes are operable generate another AIS frame for propagating to an adjacent higher level second OAM domain. Responsive to the AIS frame from the lower level first OAM domain, any alarms caused in the second OAM domain due to the fault condition in the first OAM domain are suppressed.Type: ApplicationFiled: April 14, 2014Publication date: August 7, 2014Applicant: Alcatel-Lucent USA Inc.Inventors: David Elie-Dit-Cosaque, Kamakshi Sridhar, Maarten Petrus Joseph Vissers, Tony van Kerckhove
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Patent number: 8699353Abstract: A system and method for propagating fault information in an Ethernet OAM network having multiple levels of OAM domains. An Alarm Indication and Suppression (AIS) frame is generated by a Maintenance Intermediate Point (MIP) node upon detecting a fault condition in a first OAM domain, which is transmitted to one or more Maintenance End Points (MEPs) of the first OAM domain. Upon receiving the AIS frames, the MEP nodes are operable generate another AIS frame for propagating to an adjacent higher level second OAM domain. Responsive to the AIS frame from the lower level first OAM domain, any alarms caused in the second OAM domain due to the fault condition in the first OAM domain are suppressed.Type: GrantFiled: November 19, 2010Date of Patent: April 15, 2014Assignee: Alcatel LucentInventors: David Elie-Dit-Cosaque, Kamakshi Sridhar, Maarten Petrus Joseph Vissers, Tony Van Kerckhove
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Patent number: 8467286Abstract: A system, device, and method for aggregating traffic in a network, such as for wireless backhaul traffic in a cellular communication system. UE device traffic is sent to and from an access bridge, which is one node in an access network formed into a ring topology, and from the access bridge to a core bridge in communication with a core network of the communication system. According to a preferred embodiment, the access bridge and the core bridge each have a LAG component configured according to IEEE 802.1D and IEEE 802.3-2005, and a ring component configured according to IEEE 802.1Q or 802.1AD. In operation, this LAG component load balances communication traffic coming into the bridge node onto one of two VLANs formed of portions of the access network ring. In the event of a fault condition affecting one of the two VLANs, the fault VLAN is removed from the aggregation scheme until the fault condition is alleviated.Type: GrantFiled: December 30, 2008Date of Patent: June 18, 2013Assignee: Alcatel LucentInventors: David Elie-Dit-Cosaque, Ativa Suhail, Kamakshi Sridhar
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Patent number: 8274899Abstract: A system and method for configuring Maintenance Intermediate Point (MIP) nodes of an Ethernet OAM network based on absolute level indicia as well as relative level indicia encoded in OAM frames generated by Maintenance End Point (MEP) nodes. A first OAM level field in a payload portion of an Ethernet OAM frame is encoded with an absolute OAM level associated with the originating MEP's OAM domain. A second OAM level field is encoded with a relative OAM level indicative of the number of OAM domain levels traversed by the Ethernet OAM frame.Type: GrantFiled: December 22, 2004Date of Patent: September 25, 2012Assignee: Alcatel LucentInventors: David Elie-Dit-Cosaque, Kamakshi Sridhar, Maarten Petrus Joseph Vissers, Tony Van Kerckhove
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Patent number: 8218433Abstract: A system, method, and device for monitoring the connectivity of a network that has been configured in a ring topology, such as an Ethernet ring network. The ring network includes a plurality of nodes, each with first port and a second port for forwarding CC messages to respective neighbor nodes, and an MEP for forming and processing the CC messages. Of the plurality of network nodes, neighbor nodes are selected as CC forwarding nodes and, after a database on each node has been configured, the selected nodes begin sending CC messages to each other via the ring network, beginning with transmission to a non-selected node. If a selected node fails to receive an expected CC message, it transmits a fault notification and ceases sending CC messages. The network then reselects CC message forwarding nodes, which begin forwarding CC messages until another fault is detected or the network is otherwise reconfigured.Type: GrantFiled: January 7, 2009Date of Patent: July 10, 2012Assignee: Alcatel LucentInventors: Kamakshi Sridhar, Atiya Suhail, David Elie-Dit-Cosaque
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Patent number: 8054751Abstract: A network environment including a provider network coupled to a first customer network site via a first access link and to a second customer network site via a second access link. The provider network is operable with the IEEE 802.1ag standard for propagating a remote link fault condition via an Ethernet Alarm Indication and Suppression (AIS) frame or a Continuity Check (CC) frame, which is translated into a locally compliant non-IEEE 802.1ag error delivery condition so that a management entity associated with the first customer network site is appropriately alerted.Type: GrantFiled: December 28, 2004Date of Patent: November 8, 2011Assignee: Alcatel LucentInventors: David Elie-Dit-Cosaque, Kamakshi Sridhar, Maarten Petrus Joseph Vissers, Tony Van Kerckhove
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Patent number: 8031630Abstract: Customer virtual local area networks (C-VLANs) connecting multiple LAN segments are set up through a provider network (12). Provider edge bridges (PEs) are coupled to customer edge bridges (CEs) to provide a transparent link between LAN segments. To determine whether a backdoor link is used in the C-VLAN topology, PEs monitor MAC address from a predetermined time after a TCN is received to determine if there are contradictory addresses or new addresses relative to the existing MAC address tables (or forwarding databases) that are indicative of a backdoor link. If so, an unlearning message is sent to bridges in the provider domain. In another embodiment, CEs set a snoop bit to indicate which TCNs must be snooped.Type: GrantFiled: December 16, 2003Date of Patent: October 4, 2011Assignee: Alcatel LucentInventors: David Elie-Dit-Cosaque, Girish Chiruvolu, Jessy Rouyer, Ljubisa Tancevski, Jean-Francois Cartier, Laurence Rose, L. Michele Goodwin
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Publication number: 20110116363Abstract: A system and method for propagating fault information in an Ethernet OAM network having multiple levels of OAM domains. An Alarm Indication and Suppression (AIS) frame is generated by a Maintenance Intermediate Point (MIP) node upon detecting a fault condition in a first OAM domain, which is transmitted to one or more Maintenance End Points (MEPs) of the first OAM domain. Upon receiving the AIS frames, the MEP nodes are operable generate another AIS frame for propagating to an adjacent higher level second OAM domain. Responsive to the AIS frame from the lower level first OAM domain, any alarms caused in the second OAM domain due to the fault condition in the first OAM domain are suppressed.Type: ApplicationFiled: November 19, 2010Publication date: May 19, 2011Applicant: Alcatel LucentInventors: David Elie-Dit-Cosaque, Kamakshi Sridhar, Maarten Petrus Joseph Vissers, Tony Van Kerckhove
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Patent number: 7930741Abstract: A system and method for securing an Ethernet Connectivity Fault Management (CFM) domain defined on a Virtual Local Area Network (VLAN). In one embodiment, the scheme includes, responsive to registering by an external port with the VLAN, whereby the VLAN is extended to include the external port, monitoring by a boundary Maintenance End Point (MEP) node of the Ethernet CFM domain to determine if bidirectional control frame flow (e.g., Continuity Check (CC) frame flow) is observed thereat; and, responsive to determining by the boundary MEP node that there is no bidirectional control frame flow therethrough, generating an alarm indicative of a potential breach of the Ethernet CFM domain by the external port.Type: GrantFiled: September 6, 2005Date of Patent: April 19, 2011Assignee: Alcatel LucentInventors: David Elie-Dit-Cosaque, Kamakshi Sridhar, Maarten Petrus Joseph Vissers, Jessy Rouyer
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Patent number: 7929455Abstract: A bridge (EthOAM device) and method are described herein where the bridge implements the method and reduces a number of static entries (pre-defined multicast MAC addresses) which need to be configured within a database (e.g., forwarding database (FDB)) to support the flow of Ethernet OAM multicast frames such as, for example, Connectivity Check (CC) frames and Link Trace (LT) frames which are used in accordance with the IEEE 802.1ag standard.Type: GrantFiled: July 12, 2007Date of Patent: April 19, 2011Assignee: Alcatel LucentInventors: Atiya Suhail, Kamakshi Sridhar, David Elie-Dit-Cosaque, Roberto Guglielmi
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Patent number: 7898982Abstract: A method and system for logical group endpoint discovery in a data communication network is disclosed. A network endpoint receives from a source a request identifying a logical group and determines whether a port associated with the endpoint is a member of the logical group. If a port associated with the endpoint is a member of the logical group, the endpoint transmits to the source a reply identifying the port and the logical group. The request may be multicast while the reply may be unicast. The logical group may be a VLAN or a multicast group. The source and endpoint are preferably 802.1ag maintenance endpoints. The request may include an IEEE 802.1ag continuity check multicast address as a destination address.Type: GrantFiled: August 30, 2006Date of Patent: March 1, 2011Assignee: Alcatel LucentInventors: Kamakshi Sridhar, David Elie-Dit-Cosaque, Gerard Damm
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Patent number: 7855968Abstract: A system and method for propagating fault information in an Ethernet OAM network having multiple levels of OAM domains. An Alarm Indication and Suppression (AIS) frame is generated by a Maintenance Intermediate Point (MIP) node upon detecting a fault condition in a first OAM domain, which is transmitted to one or more Maintenance End Points (MEPs) of the first OAM domain. Upon receiving the AIS frames, the MEP nodes are operable generate another AIS frame for propagating to an adjacent higher level second OAM domain. Responsive to the AIS frame from the lower level first OAM domain, any alarms caused in the second OAM domain due to the fault condition in the first OAM domain are suppressed.Type: GrantFiled: December 28, 2004Date of Patent: December 21, 2010Assignee: Alcatel LucentInventors: David Elie-Dit-Cosaque, Kamakshi Sridhar, Maarten Petrus Joseph Vissers, Tony Van Kerckhove
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Patent number: 7843845Abstract: A diagnostic tool and method are described herein that are capable of diagnosing and localizing a multicast connectivity flow fault within a layer 2 aggregation network. In one application, the diagnostic tool and method can be used by a customer service representative to diagnose why a customer cannot receive a television channel even though they can receive other television channels within an IPTV network.Type: GrantFiled: August 31, 2006Date of Patent: November 30, 2010Assignee: Alcatel LucentInventors: Kamakshi Sridhar, Atiya Suhail, David Elie-Dit-Cosaque, Gerard Damm
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Publication number: 20100172245Abstract: A system, method, and device for monitoring the connectivity of a network that has been configured in a ring topology, such as an Ethernet ring network. The ring network includes a plurality of nodes, each with first port and a second port for forwarding CC messages to respective neighbor nodes, and an MEP for forming and processing the CC messages. Of the plurality of network nodes, neighbor nodes are selected as CC forwarding nodes and, after a database on each node has been configured, the selected nodes begin sending CC messages to each other via the ring network, beginning with transmission to a non-selected node. If a selected node fails to receive an expected CC message, it transmits a fault notification and ceases sending CC messages. The network then reselects CC message forwarding nodes, which begin forwarding CC messages until another fault is detected or the network is otherwise reconfigured.Type: ApplicationFiled: January 7, 2009Publication date: July 8, 2010Inventors: Kamakshi Sridhar, Atiya Suhail, David Elie-Dit-Cosaque
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Publication number: 20100165831Abstract: A system, device, and method for aggregating traffic in a network, such as for wireless backhaul traffic in a cellular communication system. UE device traffic is sent to and from an access bridge, which is one node in an access network formed into a ring topology, and from the access bridge to a core bridge in communication with a core network of the communication system. According to a preferred embodiment, the access bridge and the core bridge each have a LAG component configured according to IEEE 802.1D and IEEE 802.3-2005, and a ring component configured according to IEEE 802.1Q or 802.1AD. In operation, this LAG component load balances communication traffic coming into the bridge node onto one of two VLANs formed of portions of the access network ring. In the event of a fault condition affecting one of the two VLANs, the fault VLAN is removed from the aggregation scheme until the fault condition is alleviated.Type: ApplicationFiled: December 30, 2008Publication date: July 1, 2010Inventors: David Elie-Dit-Cosaque, Atiya Suhail, Kamakshi Sridhar
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Patent number: 7706258Abstract: A loop detection system and method operable in an Ethernet network having a provider network and a customer network. In one embodiment, a provider edge (PE) entity is operable to generate a test frame with at least one of a destination address (DA) and source address (SA) that is unknown to the customer network. The test frame is broadcast to the customer network coupled to the PE entity. Upon determining that the test frame or its duplicates are received back by the PE entity within a first time period, loop location within the Network is deduced responsive to the determination.Type: GrantFiled: December 22, 2004Date of Patent: April 27, 2010Assignee: Alcatel LucentInventors: David Elie-Dit-Cosaque, Kamakshi Sridhar
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Patent number: 7697440Abstract: Scalable selective alarm suppression is achieved through a new class of management packet, such as a new class of Ethernet management frame, adapted to convey a reachability relationship between a lower level maintenance point and a single higher level maintenance point, and more particularly adapted to convey to a first higher level maintenance point that receives the packet an identity of a single second higher level maintenance point that will become unreachable to the first higher level maintenance point in the event of a loss of continuity involving the lower level maintenance point.Type: GrantFiled: April 28, 2006Date of Patent: April 13, 2010Assignee: Alcatel LucentInventors: David Elie-Dit-Cosaque, Atiya Suhail, Oscar Rodriguez, Kamakshi Sridhar
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Patent number: 7512141Abstract: A domain configuration system and method operable in an Ethernet OAM network having multiple levels of OAM domains. A port of a first end bridge of the network is configured as a first MEP node belonging to a predetermined OAM domain having a particular level. GARP or CC frames are transmitted from the first MEP node in a forward attribute registration process towards the remaining bridges of the network. A port of a second end bridge of the network is configured as a second MEP node of the predetermined OAM domain. In a backward attribute registration process, GARP or CC frames are transmitted from the second MEP node towards the remaining bridges of the network. Responsive to the frame flow, ports in bridges disposed between the first and second end bridges are automatically configured as MIP nodes having the particular level.Type: GrantFiled: December 28, 2004Date of Patent: March 31, 2009Assignee: Alcatel LucentInventors: David Elie-Dit-Cosaque, Kamakshi Sridhar, Maarten Petrus Joseph Vissers, Tony Van Kerckhove
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Publication number: 20080151780Abstract: A bridge (EthOAM device) and method are described herein where the bridge implements the method and reduces a number of static entries (pre-defined multicast MAC addresses) which need to be configured within a database (e.g., forwarding database (FDB)) to support the flow of Ethernet OAM multicast frames such as, for example, Connectivity Check (CC) frames and Link Trace (LT) frames which are used in accordance with the IEEE 802.1ag standard.Type: ApplicationFiled: July 12, 2007Publication date: June 26, 2008Applicant: ALCATEL LUCENTInventors: Atiya Suhail, Kamakshi Sridhar, David Elie-Dit-Cosaque, Roberto Guglielmi