Patents by Inventor Wenge Ren
Wenge Ren 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: 9088546Abstract: Systems, methods and apparatuses of establishing an IPsec (Internet Protocol Security) VPN (Virtual Private Network) tunnel are disclosed. One method includes receiving, by a wireless mesh network access point, a user configuration, wherein the user configuration includes a type of traffic, determining an internal interface of the wireless mesh network access node based on the type of traffic, dynamically determining a local endpoint address for the IPsec VPN tunnel based on the selected internal interface, establishing the IPsec VPN tunnel through the selected internal interface of the wireless mesh network access node, and encapsulating non-IP packets of non-IP traffic within IP packets.Type: GrantFiled: October 15, 2014Date of Patent: July 21, 2015Assignee: ABB Inc.Inventors: Danu Tjahjono, Rafiq Shaikh, Wenge Ren
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Publication number: 20150200735Abstract: Systems, methods and apparatuses for supporting broadcast traffic through a wireless mesh network are disclosed. One method includes obtaining broadcast listening information of a broadcast listening access node, wherein the broadcast listening information includes an identifier of the broadcast listening access node, and a broadcast identifier of the broadcast listening device. The method further includes obtaining broadcast sourcing information of a broadcast sourcing access node, wherein the broadcast sourcing information includes an identifier of the broadcast sourcing access node, and a broadcast identifier of the broadcast sourcing device. The method further includes providing broadcast listening information of the broadcast listening access node to the broadcast sourcing access node upon determining the broadcast identifier of the broadcast sourcing device matches the broadcast identifier of the broadcast listening device.Type: ApplicationFiled: June 27, 2014Publication date: July 16, 2015Applicant: TROPOS NETWORKS, INC.Inventors: Danu Tjahjono, Wenge Ren, Amalavoyal Narasimha Chari, Balaji Rajavelu
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Publication number: 20150201323Abstract: Systems, methods and apparatuses of supporting multicast traffic of a wireless mesh network are disclosed. One apparatus includes an access node that includes one or more transceivers for communicating with other devices of a wireless mesh network, and a processor. The processor is operative to receive multicast traffic from a multicast traffic source through the one or more transceivers, associate the multicast traffic with a multicast group ID, and encapsulate the received multicast traffic in unicast IP packets that include a special destination IP address associated with the multicast group ID.Type: ApplicationFiled: January 15, 2014Publication date: July 16, 2015Applicant: TROPOS NETWORKS, INC.Inventors: Danu Tjahjono, Wenge Ren, Amalavoyal Narasimha Chari, Balaji Rajavelu
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Publication number: 20150201312Abstract: Systems, methods and apparatuses for distributing multicast traffic through a wireless mesh network are disclosed. One apparatus includes an access node that includes one or more transceivers for communicating with other devices of a wireless mesh network, and a processor. The processor is operative to receive a unicast IP packet that includes a special destination IP address through at least one of the one or more transceivers, determine, based on the special destination IP address and a multicast group ID of a multicast distribution table, whether to forward the unicast IP packet to a downstream device, and route the unicast IP packet to the downstream device based on the determination.Type: ApplicationFiled: January 15, 2014Publication date: July 16, 2015Applicant: Tropos Networks, Inc.Inventors: Danu Tjahjono, Wenge Ren, Amalavoyal Narasimha Chari, Balaji Rajavelu
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Patent number: 9014051Abstract: Systems, methods and apparatuses for updating multicast group information of a client device of a wireless mesh network are disclosed. One method includes an access node of the wireless mesh network determining multicast group information of the client device that is connected to the access node, and the access node providing routing updates to upstream access nodes and a first upstream gateway, wherein the multicast group information of the client device is included within the routing updates of the client device.Type: GrantFiled: March 11, 2013Date of Patent: April 21, 2015Assignee: ABB Inc.Inventors: Srinivasa Dommalur Mylarappa, Wenge Ren
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Publication number: 20150033325Abstract: Systems, methods and apparatuses of establishing an IPsec (Internet Protocol Security) VPN (Virtual Private Network) tunnel are disclosed. One method includes receiving, by a wireless mesh network access point, a user configuration, wherein the user configuration includes a type of traffic, determining an internal interface of the wireless mesh network access node based on the type of traffic, dynamically determining a local endpoint address for the IPsec VPN tunnel based on the selected internal interface, establishing the IPsec VPN tunnel through the selected internal interface of the wireless mesh network access node, and encapsulating non-IP packets of non-IP traffic within IP packets.Type: ApplicationFiled: October 15, 2014Publication date: January 29, 2015Applicant: Tropos Networks, Inc.Inventors: Danu Tjahjono, Rafiq Shaikh, Wenge Ren
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Patent number: 8893262Abstract: Systems, methods and apparatuses of establishing an IPsec (Internet Protocol Security) VPN (Virtual Private Network) tunnel are disclosed. One method includes receiving, by a wireless mesh network access point, a user configuration, wherein the user configuration includes a type of traffic, determining an internal interface of the wireless mesh network access node based on the type of traffic, dynamically determining a local endpoint address for the IPsec VPN tunnel based on the selected internal interface, and establishing the IPsec VPN tunnel through the selected internal interface of the wireless mesh network access node.Type: GrantFiled: April 23, 2013Date of Patent: November 18, 2014Assignee: Tropos Networks, Inc.Inventors: Danu Tjahjono, Rafiq Shaikh, Wenge Ren
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Publication number: 20140064142Abstract: Systems, methods and apparatuses for updating multicast group information of a client device of a wireless mesh network are disclosed. One method includes an access node of the wireless mesh network determining multicast group information of the client device that is connected to the access node, and the access node providing routing updates to upstream access nodes and a first upstream gateway, wherein the multicast group information of the client device is included within the routing updates of the client device.Type: ApplicationFiled: March 11, 2013Publication date: March 6, 2014Applicant: Tropos Networks, IncInventors: Srinivasa Dommalur Mylarappa, Wenge Ren
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Publication number: 20140068750Abstract: Systems, methods and apparatuses of establishing an IPsec (Internet Protocol Security) VPN (Virtual Private Network) tunnel are disclosed. One method includes receiving, by a wireless mesh network access point, a user configuration, wherein the user configuration includes a type of traffic, determining an internal interface of the wireless mesh network access node based on the type of traffic, dynamically determining a local endpoint address for the IPsec VPN tunnel based on the selected internal interface, and establishing the IPsec VPN tunnel through the selected internal interface of the wireless mesh network access node.Type: ApplicationFiled: April 23, 2013Publication date: March 6, 2014Applicant: Tropos Networks, Inc.Inventors: Danu Tjahjono, Rafiq Shaikh, Wenge Ren
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Patent number: 8284694Abstract: Apparatuses and methods of using multiple radios of a wireless access node of a wireless network are disclosed. One method includes selecting a 4.9 GHz radio exclusively for public safety data packets, selecting other radios for other types of data packets, and selecting other radios for public safety data packets depending upon specification by a network operator.Type: GrantFiled: April 21, 2010Date of Patent: October 9, 2012Assignee: Tropos, Networks, Inc.Inventors: Amalavoyal Chari, Mukesh Gupta, Ramanagopal Vogety, Wenge Ren
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Patent number: 8054784Abstract: An apparatus and method of a gateway selecting transmission channels of a cluster of a wireless mesh network is disclosed. The cluster includes the gateway and a plurality of access nodes. The method includes the gateway cycling through a plurality of available transmission channels, evaluating channel each of the available transmission channels, and selecting a cluster transmission channel based on the channel evaluations. An apparatus and method of a node within a wireless mesh network selecting a transmission channel is also disclosed. The method includes the node cycling through a plurality of available transmission channels, measuring a persistence of successfully received routing packets from upstream devices at each of the available transmission channels, evaluating noise of each of the available transmission channels, and selecting one of the available transmission channels based on the persistence of successfully received routing packets and the noise.Type: GrantFiled: August 16, 2006Date of Patent: November 8, 2011Assignee: Tropos Networks, Inc.Inventors: Wenge Ren, Devabhaktuni Srikrishna, Cyrus Behroozi
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Patent number: 8036186Abstract: A method of adaptively setting a transmission power level of a node within a wireless mesh network is disclosed. The method includes monitoring a quality of a plurality of reverse direction links between the node and downstream nodes, and between the node and an upstream node, of the wireless mesh network. At least one worst quality reverse direction link is identified. If the at least one worst quality link is greater than a high threshold, then the transmission power level of the node is decreased. If the at least one worst quality link is less than a low threshold, then the transmission power level of the node is increased. A method of adaptively selecting transmission power of gateway nodes of a wireless mesh network is also disclosed. The method includes each gateway node monitoring a quality of a plurality of reverse direction links between the gateway node and downstream nodes of the wireless mesh network. Each gateway node identifies at least one worst quality reverse direction link.Type: GrantFiled: July 26, 2006Date of Patent: October 11, 2011Assignee: Tropos Networks, Inc.Inventors: Mukesh Gupta, Devabhaktuni Srikrishna, Wenge Ren, Cyrus Behroozi
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Patent number: 8031615Abstract: An apparatus and method of propagating a size of a cluster within a wireless mesh network is disclosed. The method includes a gateway within the cluster maintaining information of access nodes within the cluster. The gateway determines a cluster size based on the maintained information, and transmits routing packets that include the cluster size of the gateway. An apparatus and method of balancing clusters of a wireless mesh network is also disclosed. The method includes the gateway of each cluster originating beacons, wherein the beacons include a size of the cluster of the gateway. The access nodes of each cluster, re-broadcasts beacons received from the gateway of the cluster. A connecting access node selects which cluster to connect to at least in part based on the size of each of the clusters.Type: GrantFiled: February 27, 2007Date of Patent: October 4, 2011Assignee: Tropos Networks, Inc.Inventors: Wenge Ren, Amalavoyal Chari, Devabhaktuni Srikrishna, Cyrus Behroozi
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Patent number: 7924749Abstract: An apparatus and method of identifying long links within a wireless network is disclosed. The method includes identifying long links within a wireless network. The method includes a first node estimating a link quality of a wireless link between the first node and a second node of the wireless network. The first node uni-casts packets to the second node. The first node monitors a packet acknowledgment success rate. The first node identifies the wireless link to be a long link if the link quality is above a link threshold, and the packet acknowledgment success rate is below an acknowledgment threshold.Type: GrantFiled: April 30, 2007Date of Patent: April 12, 2011Assignee: Tropos Networks, Inc.Inventors: Wenge Ren, Frederick Dean, Cyrus Behroozi
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Patent number: 7843891Abstract: An apparatus and method of a mobile access node selecting a data transmission rate is disclosed. The method includes the mobile access node receiving beacons from a plurality of wireless clusters. Each beacon advertises a data transmission rate a gateway of the wireless cluster that originates the beacon. The mobile access node identifies at least one qualified routing path. The at least one qualified routing path includes a best quality routing path, and other routing paths having a quality within a predetermined margin of the best quality routing path. The mobile access node selects the data transmission rate of the mobile access node to be the lowest data transmission rate advertised by beacons of the at least one qualified routing path.Type: GrantFiled: May 11, 2006Date of Patent: November 30, 2010Assignee: Tropos Networks, Inc.Inventors: Wenge Ren, Amalavoyal Chari
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Publication number: 20100202397Abstract: Apparatuses and methods of using multiple radios of a wireless access node of a wireless network are disclosed. One method includes selecting a 4.9 GHz radio exclusively for public safety data packets, selecting other radios for other types of data packets, and selecting other radios for public safety data packets depending upon specification by a network operator.Type: ApplicationFiled: April 21, 2010Publication date: August 12, 2010Applicant: TROPOS NETWORKS, INC.Inventors: Amalavoyal Chari, Mukesh Gupta, Ramanagopal Vogety, Wenge Ren
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Patent number: 7729278Abstract: A method of wirelessly routing based on data packet type is disclosed. The method includes a wireless access node wirelessly receiving a data packet. The wireless access node classifies the data packet, and selects one of multiple node interfaces based on the classification of the data packet, and/or characteristics of the node interfaces. The wireless access node forwards the data packet over the selected node interface.Type: GrantFiled: May 25, 2007Date of Patent: June 1, 2010Assignee: Tropos Networks, Inc.Inventors: Amalavoyal Chari, Mukesh Gupta, Ramanagopal Vogety, Wenge Ren
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Patent number: 7688808Abstract: An apparatus and method of a mobile access node selecting a routing path through a mesh network is disclosed. The method includes receiving routing packets from at least one upstream access node, the routing packets including information of at least one upstream access node along a path to a gateway access node. A weight is assigned to each received routing packet, wherein the weight is dependent on how recently the routing packet is received. A packet success rate is calculated for each upstream access node by summing routing packets weights over a period of time for each upstream access node. The mobile node selecting the routing path through one of the at least one upstream access node based upon the packet success rate of routing packets received from each upstream access node.Type: GrantFiled: March 21, 2006Date of Patent: March 30, 2010Assignee: Tropos Networks, Inc.Inventors: Wenge Ren, Amalavoyal Chari
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Patent number: 7490161Abstract: The present invention relates to a method and system for implementing link level protocol redundancy in a router. In particular, the invention relates to providing redundancy of the Open Shortest Path First (OSPF) routing protocol. An active processor provides OSPF operations. In the present invention, a standby processor is coupled to the active processor. During an initial synchronization, all network link protocol information from the active processor is forwarded to the standby processor. The network link information can include OSPF state information, OSPF configuration information, OSPF adjacencies information, OSPF interface information and OSPF global protocol information. Thereafter, any updates of network link protocol information are immediately forwarded to the standby processor. Upon failure of the active processor, the router is switched to the standby processor and all OSPF protocol operations are performed on the standby processor.Type: GrantFiled: August 22, 2001Date of Patent: February 10, 2009Assignee: Nokia Inc.Inventor: Wenge Ren
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Publication number: 20080267141Abstract: An apparatus and method of identifying long links within a wireless network is disclosed. The method includes identifying long links within a wireless network. The method includes a first node estimating a link quality of a wireless link between the first node and a second node of the wireless network. The first node uni-casts packets to the second node. The first node monitors a packet acknowledgment success rate. The first node identifies the wireless link to be a long link if the link quality is above a link threshold, and the packet acknowledgment success rate is below an acknowledgment threshold.Type: ApplicationFiled: April 30, 2007Publication date: October 30, 2008Inventors: Wenge Ren, Frederick Dean, Cyrus Behroozi