Patents by Inventor Ping Pan
Ping Pan 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: 7894352Abstract: Detecting if a label-switched path (LSP) is functioning properly. To test that packets that belong to a particular Forwarding Equivalence Class (FEC) actually end their MPLS LSP on an label switching router (LSR) that is an egress for that FEC, a request message carrying information about the FEC whose LSP is being verified may be used. The request message may be forwarded like any other packet belonging to that FEC. A basic connectivity test as well as a fault isolation test are supported. In a basic connectivity test mode, the packet should reach the end of the LSP, at which point it is sent to the control plane of the egress LSR. The LSR then verifies that it is indeed an egress for the FEC. In a fault isolation test mode, the packet is sent to the control plane of each transit LSR, which performs various checks that it is indeed a transit LSR for the LSP. The transit LSR may also return further information that helps check the control plane against the data plane, i.e.Type: GrantFiled: December 8, 2008Date of Patent: February 22, 2011Assignee: Juniper Networks, Inc.Inventors: Kireeti Kompella, Ping Pan, Nischal Sheth
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Publication number: 20110023116Abstract: A method and apparatus for spam short message detection. The method includes obtaining sending characteristics of at least two suspected short message sources, judging whether the two suspected short message sources have similar sending characteristics, and determining the two suspected short message sources as spammer if they have similar sending characteristics. A spammer that makes multiple short message sources send short messages alternately can be detected through similar sending characteristics of the short message sources.Type: ApplicationFiled: June 28, 2010Publication date: January 27, 2011Applicant: INTERNATIONAL BUSINESS MACHINES CORPORATIONInventors: Xiao Yan Chen, Ping Pan, Chen Wang, Chun Ying, Yi Bo Zhang, Yanfeng Zhu
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Patent number: 7833500Abstract: The present invention provides a method for the oxidation of Hg0 in coal fired flue gas to form Hg2+ which is absorbed by the scrubber solution in wet-FGD or SDA, or adsorbed by the fly ash and subsequently removed from the flue stack with ESP and FF, and/or any other means as are known in the art for SOx, NOx and particulate removals. The addition of a second flue gas stream having a halogen and fly ash therein simultaneously with said hydrogen halogen or interhalogens into a coal fired flue gas further increases the oxidation of Hg0 to Hg2+.Type: GrantFiled: February 17, 2009Date of Patent: November 16, 2010Assignee: Western Kentucky UniversityInventors: Wei-Ping Pan, Yan Cao, Bobby I. T. Chen, Chien-Wei Chen
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Publication number: 20100238623Abstract: A case structure for portable hard disk drive includes a case integrally formed by bending a whole piece of sheet material to having a bottom, a top, a first lateral side, and a second lateral side portion. The second lateral side portion is formed by overlapping two lateral end portions of the sheet material. The case is provided at the same end of the bottom, top, and first lateral side portions with a perpendicularly inward extended stop flange each, and each of the stop flanges is further provided with an inward and perpendicularly projected hooking tab. A hard disk tray with a hard disk installed therein for receiving in the case is provided with retaining holes for engaging with the hooking tabs on the case. With the case integrally formed from one whole piece of sheet material, only one single mold is required and the scrap is largely reduced.Type: ApplicationFiled: December 21, 2007Publication date: September 23, 2010Inventor: Kang-Ping Pan
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Publication number: 20100142370Abstract: A connection between network nodes in a communication network is backed up. A failover label-switched path (LSP) is created starting at a first network node of a connection and ending 5 at the second node of the connection, while bypassing the protected connection. In the event of connection failure, data is transmitted through the failover LSP. A network operator can selectively protect different types of data by using filters that bind one or more types of traffic received over one or more interfaces to different failover LSPs.Type: ApplicationFiled: February 15, 2010Publication date: June 10, 2010Inventors: Ping PAN, Der-Hwa Gan, Keith E. Holleman, Manoj Leelanivas, Nischal Sheth, Arun Vaidyanathan
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Patent number: 7702810Abstract: Outages in a label-switched path (LSP) are detected quickly using adjacency information, such as IGP “hello neighbor” queries. Protocols, such as IGP can be instructed to check certain adjacencies more frequently. For example, a node in an LSP can determine a next downstream node in the LSP as an adjacency, check that adjacency much more frequently, and in the event that the adjacency is lost (due to a down link, a down interface, or a down node), switch any LSPs that have the adjacency to a failover path or route. Since these checks need not be performed using hardware signaling, outages of shared media interfaces, such as Ethernet and Gigabit Ethernet, can be checked.Type: GrantFiled: February 3, 2003Date of Patent: April 20, 2010Assignee: Juniper Networks, Inc.Inventors: Ping Pan, Der-Hwa Gan, Nischal Sheth
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Patent number: 7680128Abstract: The present invention provides methods and apparatuses for interfacing high-layer applications to Link Capacity Adjustment Scheme (LCAS) on Synchronous Optical Network/Synchronous Digital Hierarchy (SONET/SDH) edge nodes. These applications include high-level control protocols, such as Generalized Multiprotocol Label Switching (GMPLS) and Optical Switching and Routing Protocol (OSRP), and user-initiated cross-connect creation and termination. The present invention provides a mechanism that is capable of mapping SONET/SDH connections to Virtual Concatenated Groups (VCGs), thus enabling an efficient interface for operators to control and manage the connections via LCAS. As part of the mechanism, the existing LCAS protocol state machine is enhanced such that the operators can shut down bi-directional SONET/SDH flows from a single edge node, as opposed to from both source and sink nodes, as provided for by existing specifications.Type: GrantFiled: July 19, 2005Date of Patent: March 16, 2010Assignee: Ciena CorporationInventors: Bhavesh Nisar, Qin Wan, Ping Pan, Hon Tat Ho, Raghu Arja
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Patent number: 7680952Abstract: A connection between network nodes in a communication network is backed up. A failover label-switched path (LSP) is created starting at a first network node of a connection and ending at the second node of the connection, while bypassing the protected connection. In the event of connection failure, data is transmitted through the failover LSP. A network operator can selectively protect different types of data by using filters that bind one or more types of traffic received over one or more interfaces to different failover LSPs.Type: GrantFiled: June 16, 2004Date of Patent: March 16, 2010Assignee: Juniper Networks, Inc.Inventors: Ping Pan, Der-Hwa Gan, Keith E. Holleman, Manoj Leelanivas, Nischal Sheth, Arun Vaidyanathan
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Publication number: 20100031138Abstract: A method for generating a Simple Object Access Protocol (SOAP) message in XML during execution of a process in a SOA-based process engine apparatus and a corresponding process engine apparatus. The method includes: generating and storing an XML character string containing a fixed SOAP message skeleton; generating and storing an XML character string containing an instance-constant variable; generating an XML character string containing a dynamic variable; and concatenating the XML character string containing the fixed SOAP message skeleton and the XML character string containing the instance-constant variable as previously stored and the XML character string containing the dynamic variable by a character string concatenating operation to generate a SOAP message. A process engine apparatus including a message analyzer unit, a message pre-composer unit, a character string depository, and a message composer unit is also provided.Type: ApplicationFiled: July 30, 2009Publication date: February 4, 2010Applicant: INTERNATIONAL BUSINESS MACHINES CORPORATIONInventors: Jin Ling, Liang Liu, Ping Pan, Qi Ming Tian
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Publication number: 20090086644Abstract: Detecting if a label-switched path (LSP) is functioning properly. To test that packets that belong to a particular Forwarding Equivalence Class (FEC) actually end their MPLS LSP on an label switching router (LSR) that is an egress for that FEC, a request message carrying information about the FEC whose LSP is being verified may be used. The request message may be forwarded like any other packet belonging to that FEC. A basic connectivity test as well as a fault isolation test are supported. In a basic connectivity test mode, the packet should reach the end of the LSP, at which point it is sent to the control plane of the egress LSR. The LSR then verifies that it is indeed an egress for the FEC. In a fault isolation test mode, the packet is sent to the control plane of each transit LSR, which performs various checks that it is indeed a transit LSR for the LSP. The transit LSR may also return further information that helps check the control plane against the data plane, i.e.Type: ApplicationFiled: December 8, 2008Publication date: April 2, 2009Inventors: Kireeti KOMPELLA, Ping Pan, Nischal Sheth
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Publication number: 20090084061Abstract: A fire-prevention structure for buildings includes at least a first fire-prevention district, a fire-prevention floor slab, and a second fire-prevention district. The first fire-prevention district having at least a steel-structured story further includes a plurality of first steel columns and a plurality of first steel beams. The first steel column is a hollow rectangular column with an upper end opening. The first steel beam is connected to a lateral side of the first steel column. The fire-prevention floor slab is constructed on top of the first steel beams and partly inside the end opening of the first steel column. The second fire-prevention district having at least a steel-structured story further includes a plurality of second steel columns and a plurality of second steel beams. The second steel column has a lower end portion further extruding an engagement plate and an engagement column.Type: ApplicationFiled: October 2, 2007Publication date: April 2, 2009Inventor: Chan-Ping PAN
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Patent number: 7477657Abstract: Techniques are described for supporting end-to-end resource reservation protocols, such as the Resource Reservation Setup Protocol (RSVP), using Multi-protocol Label Switching (MPLS). A routing device, such as an edge router coupling a local network to another network, aggregates packet flow reservation requests, and maps the resource requests to Labeled Switch Paths (LSPs) capable of supporting the requested resources. Requests having common forwarding equivalence classes may be aggregated to flow through a single LSP having resources, such as bandwidth, capable of supporting the requests. Routers and other devices within the network need not monitor and support state information associated with the individual end-to-end packet flows. A method, for example, includes mapping requests for end-to-end packet flows through a network to LSPs within the network, and forwarding packets associated with the end-to-end packet flows along the LSPs based on the mapping.Type: GrantFiled: May 8, 2002Date of Patent: January 13, 2009Assignee: Juniper Networks, Inc.Inventors: James Murphy, Ping Pan
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Patent number: 7463591Abstract: Detecting if a label-switched path (LSP) is functioning properly. To test that packets that belong to a particular Forwarding Equivalence Class (FEC) actually end their MPLS LSP on an label switching router (LSR) that is an egress for that FEC, a request message carrying information about the FEC whose LSP is being verified may be used. The request message may be forwarded like any other packet belonging to that FEC. A basic connectivity test as well as a fault isolation test are supported. In a basic connectivity test mode, the packet should reach the end of the LSP, at which point it is sent to the control plane of the egress LSR. The LSR then verifies that it is indeed an egress for the FEC. In a fault isolation test mode, the packet is sent to the control plane of each transit LSR, which performs various checks that it is indeed a transit LSR for the LSP. The transit LSR may also return further information that helps check the control plane against the data plane, i.e.Type: GrantFiled: February 12, 2003Date of Patent: December 9, 2008Assignee: Juniper Networks, Inc.Inventors: Kireeti Kompella, Ping Pan, Nischal Sheth
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Publication number: 20080221325Abstract: An exchange membrane containing modified maleimide oligomers comprising sulfonated poly(aryl ether ketone) (S-PAEK) and modified maleimide oligomers. The exchange membrane uses the modified maleimide oligomers having a hyper-branched architecture as matrix, and introduces them into S-PAEK to constitute semi-interpenetration network (semi-IPN), so as to intensify water holding capacity, chemical resistance, the electrochemical stability and thermal resistance of the ionic/proton exchange membrane. The exchange membrane can be used to fabricate the membrane electrode assemblies, fuel cells, and be applied them to the fields of seawater desalination, heavy water and sewage treatment, and biomass-energy resources.Type: ApplicationFiled: December 27, 2007Publication date: September 11, 2008Inventors: Jing-Ping Pan, Tsung-Hsiung Wang, Jung-Mu Hsu, Peter P. Chu, Chien-Shun Wu, Bo-Jun Liu
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Method and apparatus for performing data flow ingress/egress admission control in a provider network
Patent number: 7417950Abstract: A method, apparatus and network for transporting layer-2 frames, such as Ethernet MAC, ATM AAL5, and Frame Relay, over MPLS, SONET/SDH, or OTN optical transport networks as well as electrical transport networks is disclosed. The method establishes “pseudo-wires” between, for example, routers, Layer-2 packet switches, or SONET/SDH switches. Inter-related ingress and egress resource tables may be used by provider edge nodes to negotiate consistently managed data tunnels across a provider network on behalf of data flowing from/to a diverse base of customer edge nodes. Detailed network resource information particular to each of the data flows is exchanged between provider edge nodes during the creation of pseudo-wires. Admission control algorithms are applied at the ingress and egress points in order to manage the data flows into a provider network and exiting from a provider network to customer equipment.Type: GrantFiled: February 3, 2004Date of Patent: August 26, 2008Assignee: Ciena CorporationInventors: Ralph Theodore Hofmeister, Ping Pan -
Publication number: 20080192762Abstract: When a node has to restart its control component, or a (e.g., label-switched path signaling) part of its control component, if that node can preserve its forwarding information across the restart, the effects of such restarts on label switched path(s) the include the restarting node are minimized. A node's ability to preserve forwarding information across a control component (part) restart is advertised. In the event of a restart, stale forwarding information can be used for an limited time before. The restarting node can use its forwarding information, as well as received label-path advertisements, to determine which of its labels should be associated with the path, for advertisement to its peers.Type: ApplicationFiled: April 11, 2008Publication date: August 14, 2008Inventors: Kireeti KOMPELLA, Manoj Leelanivas, Ping Pan, Yakov Rekhter
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Publication number: 20080188343Abstract: A differential includes first and second case members that are attached to each other to define an inner cavity that receives a differential gear assembly. A first tapered roller bearing is associated with the first case member and a second tapered roller bearing is associated with the second case member. One of the first and second tapered roller bearings is inverted such that a defining taper diverges towards the differential gear assembly. The other of the first and second tapered roller bearings is non-inverted with a defining taper diverging in a direction that faces away from the differential gear assembly.Type: ApplicationFiled: February 2, 2007Publication date: August 7, 2008Inventors: Jaw-Ping Pan, David Platner, Hussein Maher Kalaoui, Jack R. McKenzie
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Patent number: 7359377Abstract: When a node has to restart its control component, or a (e.g., label-switched path signaling) part of its control component, if that node can preserve its forwarding information across the restart, the effects of such restarts on label switched path(s) the include the restarting node are minimized. A node's ability to preserve forwarding information across a control component (part) restart is advertised. In the event of a restart, stale forwarding information can be used for an limited time before. The restarting node can use its forwarding information, as well as received label-path advertisements, to determine which of its labels should be associated with the path, for advertisement to its peers.Type: GrantFiled: March 11, 2002Date of Patent: April 15, 2008Assignee: Juniper Networks, Inc.Inventors: Kireeti Kompella, Manoj Leelanivas, Ping Pan, Yakov Rekhter
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Patent number: 7336615Abstract: Testing the liveliness of a data plane of a label switched path (LSP) using a two stage approach. The first stage may use a general echo request operation that may be implemented using hardware. Therefore, the first stage does not heavily burden the control plane of the LSR. If a suspect LSP passes the first stage of the diagnostic operation, nothing more needs to be done. If, however, the suspect LSP fails the first stage, the diagnostic operation proceeds to a second stage. The second stage of the diagnostic operation sends probing massages through the suspect LSP, but uses the control plane to deliver the acknowledging messages. If the suspect LSP fails the second stage of the diagnostic operation, the ingress LSR can infer that the LSP is down, and begin recovery actions. The probing messages may include padding so that MTU limits can be tested.Type: GrantFiled: June 25, 2002Date of Patent: February 26, 2008Assignee: Juniper Networks, Inc.Inventors: Ping Pan, Nischal Sheth
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Publication number: 20080037425Abstract: Binding a control plane to a data plane is disclosed. Binding includes receiving a request to initiate a session, wherein the request is sent via a Session Initiation Protocol (SIP)-based protocol and transmitting a set of one or more service parameters associated with the request to an edge node configured to participate in the session.Type: ApplicationFiled: October 12, 2006Publication date: February 14, 2008Inventors: Ping Pan, Richard Gitlin