Patents by Inventor Tat Keung Chan
Tat Keung Chan 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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Publication number: 20100215171Abstract: In a method for testing a transport packet decrypting module of a client device, a first decryption operation of the transport packet decrypting module is implemented on a test encrypted control word using a content decryption key ladder to derive a test control word, a second decryption operation of the transport packet decrypting module is implemented on one or more test transport packets using the test control word via a predetermined content decryption algorithm, the KIV is derived from the decrypted transport packets, and the derived KIV is compared with a value stored in the client device to verify whether the transport packet decrypting module of the client device is functioning properly.Type: ApplicationFiled: February 18, 2010Publication date: August 26, 2010Applicant: GENERAL INSTRUMENT CORPORATIONInventors: Tat Keung Chan, Alexander Medvinsky, Stuart P. Moskovics, Jason A. Pasion, Xin Qiu
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Non-intrusive method and system for coupling powerline communications signals to a powerline network
Patent number: 7778152Abstract: In one embodiment, a powerline system includes a data connection, a powerline module coupled to the data connection, a physical socket coupled to the powerline module and including a female connector device, a male connector device inserted into the female connector device, and a pair of wires coupled to and extending from the male connector device. The female connector device comprises a first female connector and a second female connector. The male connector device comprises a first male connector coupled to the first female connector and a second male connector coupled to the second female connector. The first wire of the pair of wires is coupled to and extending from the first male connector, and the second wire of the pair of wires is coupled to and extending from the second male connector respectively.Type: GrantFiled: February 14, 2008Date of Patent: August 17, 2010Assignee: Asoka USA CorporationInventor: Tat Keung Chan -
Patent number: 7769907Abstract: A system for powerline networking. The system has an external data source, which is derived from a world wide networks of computers. A router is coupled to the external data source and coupled to a first datasource connection. A powerline network switch apparatus is coupled to the first datasource connection. The apparatus has a second datasource connection, which is coupled to the first data source connection. The apparatus has a powerline device coupled to the second datasource connection. The powerline device is adapted to receive and transmit information in a first format from the second data source connection and adapted to receive and transmit information in a second format. The apparatus has a virtual local area network device including a first input/output port and a plurality of second input/output ports. Each of the second input/output ports is numbered from 1 through N, where N is an integer greater than 1.Type: GrantFiled: August 20, 2007Date of Patent: August 3, 2010Assignee: Asoka USA CorporationInventors: Tat Keung Chan, Songly Mu
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NON-INTRUSIVE METHOD AND SYSTEM FOR COUPLING POWERLINE COMMUNICATIONS SIGNALS TO A POWERLINE NETWORK
Publication number: 20090207924Abstract: A powerline system including non-intrusive coupling for powerline communications. The system has a powerline module couple to a data connection. In a specific embodiment, the powerline module is configured to process a first data signal in a first format to a second data signal in a second format, which is an OFDM format capable of being configured for transmission through one or more powerline cables. The system has a physical socket coupled to the powerline module. In a specific embodiment, the physical socket has a female connector device, which includes at least a first connector and a second connector. In a specific embodiment, the first connector and the second connector are electrically coupled to the second data signal in the second format. The system also has a male connector device, which is inserted into the female connector device. The male connector includes at least a first male connector and a second male connector are coupled respectively to the first connector and the second connector.Type: ApplicationFiled: February 14, 2008Publication date: August 20, 2009Applicant: Asoka USA CorporationInventor: TAT KEUNG CHAN -
Publication number: 20090135848Abstract: System and method for repeater in a power line network. According to an embodiment, the present invention provides a method for power line communication network. The method includes providing a virtual local area network (VLAN), which VLAN includes at least a repeater, a client, and a gateway. The VLAN is associated with a network encryption key. The repeater is associated with a first identification. The client is associated with a second identification. The gateway is associated with a third identification. The first identification and the third identification are a service identification type. The second identification is a client identification type. The method also includes providing a power line network that is configured to transmit data through OFDM signaling. The method includes sending a first data packet in first format from the client through the power line network.Type: ApplicationFiled: November 26, 2007Publication date: May 28, 2009Applicant: Asoka USA CorporationInventors: Tat Keung Chan, Ray Liang
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Patent number: 7461174Abstract: A system for powerline networking has an external data source derived from a world wide networks of computers. A router is coupled to the external data source and a first datasource connection. A powerline network-apparatus including a second datasource connection is coupled to the first datasource connection. The apparatus includes a powerline device coupled to the second datasource connection and adapted to receive and transmit information in a first format from the second datasource connection and adapted to receive and transmit information in a second format. The apparatus also has a virtual local area network (VLAN) device including a first input/output port and a plurality of second input/output ports. A plurality of modem devices are coupled to the VLAN device respectively via the plurality of second input/output ports and also are respectively coupled to a plurality of powerlines capable of communicating information to and from the second datasource connection.Type: GrantFiled: June 2, 2006Date of Patent: December 2, 2008Assignee: Asoka USA CorporationInventors: Tat Keung Chan, Songly Mu
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Patent number: 7457885Abstract: A powerline network system. An embodiment of the present invention provides a powerline network device. The device includes a first network interface connected to a data source, the first network interface being configured to receive network data in a first format. The device also includes a first powerline communication module configured to convert data from the first format to a second format. The device further includes a switch having an input port and N output ports, the input port being connected to the first powerline communication module. Also, the device includes a plurality of powerline communication modules, the plurality of power communication modules including a second powerline communication module and a third powerline communication module. Moreover, the device includes a first powerline coupler, the first powerline coupler being configured to couple a first data signal from the second powerline communication module to a first phase, a second phase, and a third phase of a powerline.Type: GrantFiled: February 10, 2005Date of Patent: November 25, 2008Assignee: Asoka USA CorporationInventors: Tat Keung Chan, Songly Mu
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Patent number: 7426581Abstract: A system includes a power transformer device and a powerline box coupled to the transformer device, the powerline box including three lines including a first phase, a second phase, and a third phase. The three phases are derived from the power transformer device. The system has a powerline coupler coupled to the first phase, the second phase, and the third phase and a multichannel data communication device coupled to the powerline coupler. The system has a first and a second capacitors coupled to the first phase and a first length of wiring between the first capacitor and the second capacitor. The system has a third and a fourth capacitors coupled to the second phase and a second length of wiring. The system has a fifth and a sixth capacitors coupled to the third phase and a third length of wiring.Type: GrantFiled: February 2, 2007Date of Patent: September 16, 2008Assignee: ASOKA USA CorporationInventors: Tat Keung Chan, Songly Mu
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Publication number: 20080215762Abstract: A system for powerline networking. The system has an external data source, which is derived from a world wide networks of computers. A router is coupled to the external data source and coupled to a first datasource connection. A powerline network switch apparatus is coupled to the first datasource connection. The apparatus has a second datasource connection, which is coupled to the first data source connection. The apparatus also has a powerline device coupled to the second datasource connection. Preferably, the powerline device is adapted to receive and transmit information in a first format from the second data source connection and adapted to receive and transmit information in a second format. The apparatus also has a virtual local area network device including a first input/output port and a plurality of second input/output ports. Each of the second input/output ports is numbered from 1 through N, where N is an integer greater than 1.Type: ApplicationFiled: March 25, 2008Publication date: September 4, 2008Applicant: Asoka USA CorporationInventors: Tat Keung Chan, Songly Mu
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Publication number: 20080205450Abstract: A power line module and method. In a preferred embodiment, the power line module is adapted to couple to a power line outlet, which is provided on a power line network within a spatial region. A power line chip is within a housing. In a preferred embodiment. the power line chip has an input/output port and is capable of converting a power line telecommunication signal having a data rate of greater than about 80 Megabits per second from the power line network to an Ethernet signal for use in a local area network segment. The module has a coupling device coupled to the input/output port of the power line chip. In a preferred embodiment, the module has a first pin comprising a plurality of first spring members operably coupled the coupling device. The first pin is insertable into a first site of the power outlet. The module has a second pin comprising a plurality of second spring members operably coupled to the coupling device.Type: ApplicationFiled: August 24, 2007Publication date: August 28, 2008Applicant: Asoka USA CorporationInventor: Tat Keung Chan
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Patent number: 7413471Abstract: A portable connector for power line networking. The connector includes a single AC connector, which has at least a first prong and a second prong (which will be plugged into a conventional connector device). The connector also has at least a first pair of wires coupled to the single AC connector. The first pair of wires includes a first wire coupled to the first prong and a second wire coupled to the second prong. A hardware module is coupled to the first pair of wires, which are adapted to transmit a plurality of AC signals corresponding to AC power from the AC connector and a plurality data signals from the AC connector. A single DC connector is coupled to the hardware module. A single network connector is also coupled to the hardware module.Type: GrantFiled: February 10, 2005Date of Patent: August 19, 2008Assignee: Asoka USA CorporationInventor: Tat Keung Chan
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Patent number: 7415541Abstract: A powerline network switch apparatus is coupled to a first datasource connection. The apparatus has a second datasource connection, which is coupled to the first data source connection. The apparatus also has a powerline device coupled to the second datasource connection. Preferably, the powerline device is adapted to receive and transmit information in a first format from the second data source connection and adapted to receive and transmit information in a second format. The apparatus also has a virtual local area network device including a first input/output port and a plurality of second input/output ports. Each of a plurality of modem devices is coupled respectively to one of the plurality of second input/output ports and each of the plurality of modem devices also being coupled to one of a plurality of power lines, capable of communicating information to and from the second data source connection.Type: GrantFiled: June 2, 2006Date of Patent: August 19, 2008Assignee: Asoka USA CorporationInventors: Tat Keung Chan, Songly Mu
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Patent number: 7401239Abstract: A power supply apparatus and related method. The power supply apparatus has an AC input. The apparatus has a converter for converting AC power into DC power. In a specific embodiment, the converter has an input and an output. In a specific embodiment, the input of the converter is coupled to the AC input. The power supply apparatus has a DC output for voltage ranging. The output of the converter is coupled to the DC output. The apparatus also has a fan operably configured to transfer thermal energy away from the converter and a data input/output port, the data input/output port being coupled to a data signal from a data source. The apparatus has a coupler coupled between the data input/output port and the AC input. A power line module is coupled to the coupler. The power line module is adapted to convert the data signal from a first format to a second format. The second format is capable of transmission to the AC input. An enclosure is provided for the coupler.Type: GrantFiled: September 2, 2005Date of Patent: July 15, 2008Assignee: Asoka USA CorporationInventors: Tat Keung Chan, Songly Mu
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Publication number: 20080165463Abstract: A plug in power line module apparatus, e.g., removable to be for plug and play. The apparatus has a removable housing member, which has an outer region and an inner region. In a preferred embodiment, the housing member has a width, a length, and a depth. The apparatus has a first prong and a second prong extending from the removable housing member. The first prong and the second prong are adapted to couple into a power line outlet. In a preferred embodiment, the first prong and the second prong can be physically inserted into one or more different power outlets, e.g., U.S. standard, China standard, European standard, Japan standard. In a specific embodiment, the apparatus has a communication port coupled to the first prong and the second prong, the communication port. In a preferred embodiment, the communication port is for an Ethernet (i.e., CAT 5) connector, VoIP connector, or other communication devices.Type: ApplicationFiled: September 28, 2007Publication date: July 10, 2008Applicant: Asoka USA CorporationInventor: Tat Keung Chan
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Patent number: 7387529Abstract: A portable connector for power line networking. The connector includes a single AC connector, which has at least a first prong and a second prong (which will be plugged into a conventional connector device). The connector also has at least a first pair of wires coupled to the single AC connector. The first pair of wires includes a first wire coupled to the first prong and a second wire coupled to the second prong. A hardware module is coupled to the first pair of wires, which are adapted to transmit a plurality of AC signals corresponding to AC power from the AC connector and a plurality data signals from the AC connector. A single DC connector is coupled to the hardware module. A single network connector is also coupled to the hardware module.Type: GrantFiled: May 3, 2006Date of Patent: June 17, 2008Assignee: Asoka USA CorporationInventor: Tat Keung Chan
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Patent number: 7340771Abstract: A communications system and method for dynamically creating at least one pinhole in a firewall are provided. The communications system includes a protected node capable of initiating a communication session with an outside node. In this regard, the protected node is capable of receiving flow parameters regarding the communication session as the communication session is setup. The system also includes a firewall disposed along a communications path between the protected node and the outside node. The protected node is capable of sending at least a portion of the flow parameters to a firewall-controlled proxy, which in turn, is capable of forwarding the portion of the flow parameters to the firewall. Thereafter, the firewall is capable of creating at least one pinhole based upon the portion of the flow parameters to thereby permit the transmission of information between the outside node and the protected node during the communication session.Type: GrantFiled: June 13, 2003Date of Patent: March 4, 2008Assignee: Nokia CorporationInventors: Tat Keung Chan, Ram Gopal Lakshmi Narayanan, Sr.
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Publication number: 20070073858Abstract: The invention relates to a virtual computing platform for providing subscribers of the virtual computing platform with means for running their applications on the platform instead of running the applications on their mobile devices. The virtual computing platform is adapted to route internal communication directed from a first application of the platform to a second application of the platform via a set of external security appliances. The set may include a firewall, a security gateway, an application layer firewall, a web shield, an anti-virus device and an anti-spam device.Type: ApplicationFiled: September 27, 2005Publication date: March 29, 2007Inventors: Ram Lakshmi Narayanan, Tat Keung Chan
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Publication number: 20060280305Abstract: In one exemplary and non-limiting aspect thereof a method is provided that includes sending a wireless network (WN) a first message that includes a list of authentication mechanisms supported by a node and, in association with each authentication mechanism, a corresponding identity; determining in the WN an authentication mechanism to be used for bootstrapping, based at least on the list received from the node; and including information in a second message that is sent to the node, the information including the determined authentication mechanism in conjunction with a corresponding identity. The method further includes protecting at least the list of authentication mechanisms supported by the node and the corresponding identities and sending a second message to the network, the second message including at least the list of authentication mechanisms and the corresponding identities.Type: ApplicationFiled: March 8, 2006Publication date: December 14, 2006Inventors: Gabor Bajko, Tat Keung Chan
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Patent number: 7136936Abstract: A system for powerline networking. The system has an external data source, which is derived from a world wide networks of computers. A router is coupled to the external data source and coupled to a first datasource connection. A powerline network switch apparatus is coupled to the first datasource connection. The apparatus has a second datasource connection, which is coupled to the first data source connection. The apparatus also has a powerline device coupled to the second datasource connection. Preferably, the powerline device is adapted to receive and transmit information in a first format from the second data source connection and adapted to receive and transmit information in a second format. The apparatus also has a virtual local area network device including a first input/output port and a plurality of second input/output ports. Each of the second input/output ports is numbered from 1 through N, where N is an integer greater than 1.Type: GrantFiled: November 12, 2003Date of Patent: November 14, 2006Assignee: Asoka USA CorporationInventors: Tat Keung Chan, Songly Mu
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Publication number: 20040255156Abstract: A communications system and method for dynamically creating at least one pinhole in a firewall are provided. The communications system includes a protected node capable of initiating a communication session with an outside node. In this regard, the protected node is capable of receiving flow parameters regarding the communication session as the communication session is setup. The system also includes a firewall disposed along a communications path between the protected node and the outside node. The protected node is capable of sending at least a portion of the flow parameters to a firewall-controlled proxy, which in turn, is capable of forwarding the portion of the flow parameters to the firewall. Thereafter, the firewall is capable of creating at least one pinhole based upon the portion of the flow parameters to thereby permit the transmission of information between the outside node and the protected node during the communication session.Type: ApplicationFiled: June 13, 2003Publication date: December 16, 2004Applicant: Nokia CorporationInventors: Tat Keung Chan, Ram Gopal Lakshmi Narayanan