Patents Assigned to Nortel Networks
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Publication number: 20110211462Abstract: A system and method for scheduling cooperative uplink transmissions a virtual multiple input multiple output (MIMO) wireless communication environment are provided. More specifically, both random and channel aware orthogonal scheduling techniques for identifying a sub-set of N mobile terminals to provide cooperative uplink transmissions for each transmit time interval are provided.Type: ApplicationFiled: May 9, 2011Publication date: September 1, 2011Applicant: Nortel Networks LimitedInventors: Jianming Wu, Ming Jia, Wen Tong, Peiying Zhu
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Publication number: 20110213891Abstract: The present invention provides a centralized home controller that is used to coordinate a plurality of associated packet communication clients. The home controller provides a centralized and unified control and messaging system for the various packet communication clients. The home controller also allows the packet communication clients to establish and control packet sessions among the associated packet communication clients, as well as between any one of the packet communication clients and remote clients. The packet communication clients are provided in consumer electronics devices, and the associated packet sessions support data, voice, audio, or video content. In one embodiment, the home controller acts as a proxy for the various communications between the packet communication clients.Type: ApplicationFiled: May 9, 2011Publication date: September 1, 2011Applicant: NORTEL NETWORKS LIMITEDInventor: Samuel H. Christie, IV
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Publication number: 20110212740Abstract: To schedule uplink transmission time slots for a collection of mobile communication devices, a set of base station target interference patterns is associated with base stations. A time slot target interference pattern is assigned for each time slot and it repeats after several time slots. The time slot target interference pattern in a given time slot specifies the interference allowed by each time slot to a given base station by any single mobile. A priority index may be determined for each time slot for each mobile associated with the particular base station. The priority index may be based, in part, on a determined correlation between the time-slot target interference patterns and a potential interference profile of a mobile to which a time slot is to be allocated. A mobile's throughput requirement, the throughput already received over a specified past duration, the system fairness requirement, as well as the amount of data available for transmission are also used for evaluating the priority index.Type: ApplicationFiled: May 9, 2011Publication date: September 1, 2011Applicant: NORTEL NETWORKS LIMITEDInventors: Nimal Senarath, Kelvin Kar-Kin Au, Shalini Periyalwar
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Patent number: 8010794Abstract: In a system comprising a broadcasting subsystem and a radiocommunication subsystem each connected to a mediation platform, said transmission being ciphered and arranged for being deciphered by using a key, the following steps are performed at the mediation platform, relatively to a user or group of users having terminals: determining one first and at least one second sets of values from said key, so that the knowledge of all the determined sets of values is required to retrieve the key; and controlling the broadcasting subsystem so that it transmits the first set of values to the user or group of users and the radiocommunication subsystem so that it transmits the at least one second set of values to the user or group of users.Type: GrantFiled: June 27, 2006Date of Patent: August 30, 2011Assignee: Nortel Networks LimitedInventor: Thierry Lucidarme
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Patent number: 8010607Abstract: Contacts are managed within a contact centre by representing each contact as a software object which contains skillset and priority identifiers. Contact objects are queued relative to one another by means of references to and/or from the object(s) immediately ahead of and behind each contact. In this way a conventional queue can be dispensed with. Queries can be made to a plurality of contact centres across a network to identify objects matching certain criteria at the top of each local queue. In this way a set of local queues substitutes for a network queue providing increased resilience in the case of the failure of any individual component of the network or of the network itself.Type: GrantFiled: August 21, 2003Date of Patent: August 30, 2011Assignee: Nortel Networks LimitedInventors: Tony McCormack, Nithyaganesh Kirubalaratnam, Neil O'Connor
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Publication number: 20110206018Abstract: In general, to provide acknowledgment information by a first wireless device, the first wireless device sends repeated instances of acknowledgment information in respective first and second frame structures, in response to receipt of first information from a second wireless devalue. In addition, the first wireless device also sends further acknowledgment information in the second frame structure that is responsive to second information received from the second wireless device.Type: ApplicationFiled: November 4, 2009Publication date: August 25, 2011Applicant: NORTEL NETWORKS LIMITEDInventors: Jun Li, Lai-King Tee
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Publication number: 20110206007Abstract: A method and system for connection management in a wireless data network, such as a 1×EV-DO network adds connections to new network sectors upon receipt of a connection request from an active terminal, but removes data connections that the active terminal requests to be dropped only after confirmation from the active terminal that a channel allocation message has been received and applied. The active network maintains an active set of connections that is at least as large as the active set maintained by the active terminal and does not initiate a connection termination if no confirmation of the channel allocation message is received. This allows for a reduction in the number of dropped connections.Type: ApplicationFiled: May 2, 2011Publication date: August 25, 2011Applicant: NORTEL NETWORKS LIMITEDInventors: Xixian Chen, Weigang Li, Vasanta Chivukula, Shiva Mirzaei-Rezaei, Brian Troup, Miroslav Budic, Yong Zhou, Ryan Santa
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Publication number: 20110208813Abstract: A user status may be updated at one of a plurality of network entities associated with a user. Through communication between the network entity on which the update has been made and a central server, an indication of the status update may be transmitted, by the central server, to the other network entities associated with the user.Type: ApplicationFiled: June 30, 2009Publication date: August 25, 2011Applicant: NORTEL NETWORKS LIMITEDInventors: John Storrie, Michael Mentz, Paul Skidmore, Lydia Chung
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Patent number: 8004371Abstract: Distributed band reject filters are disclosed. A first radio frequency band reject filter is disclosed having a splitter having a first input port, a first output port and a second output port, the splitter being operable on an input signal applied to the first input port to provide a respective output signal proportional to the input signal at each of the first and second output ports, the output signals having a phase shift between 45 degrees and 135 degree with respect to the input signal, as well as first, second and third acoustic resonators coupled respectively to the first input port, the first output port and the second output port.Type: GrantFiled: August 16, 2010Date of Patent: August 23, 2011Assignee: Nortel Networks LimitedInventors: Steve Beaudin, Chun-Yun Jian, Somsack Sychaleun
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Patent number: 8005016Abstract: A method of multicast route computation in a link state protocol controlled network. A spanning tree is computed from a first node to every other node in the network using a known spanning tree protocol. The network is then divided into two or more partitions, each partition encompassing an immediate neighbor node of the first node and any nodes of the network subtending the neighbor node on the spanning tree. Two or more of the partitions are merged when a predetermined criterion is satisfied. Nodes within all of the partitions except a largest one of the partitions are then identified, and each identified node examined to identify node pairs for which a respective shortest path traverses the first node.Type: GrantFiled: October 28, 2008Date of Patent: August 23, 2011Assignee: Nortel Networks LimitedInventors: Jerome Chiabaut, David Allan, Nigel Bragg
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Patent number: 8005029Abstract: The present invention provides a technique for handling damaged named signal event (NSE) packets that are received in association with a voice over packet based telephony call. The received packets for a telephony call may include voice packets as well as NSE packets. Upon receipt of the packets at a physical layer, the packets are processed at a link layer to detect damaged packets having link layer errors. The incoming packets are sent to an audio application at an application layer for further processing. For damaged packets, link layer error indicia is generated at the link layer and sent to the audio processing application. The audio application will use the link layer error indicia to identify damaged packets or payloads associated with damaged packets, and determine whether the payloads corresponding to the damaged packets include NSE information defining an NSE. Damaged NSE packets are processed accordingly.Type: GrantFiled: December 22, 2005Date of Patent: August 23, 2011Assignee: Nortel Networks LimitedInventor: Michael Flynn Thomas
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Patent number: 8005160Abstract: The present invention employs hierarchical modulation to simultaneously transmit data over different modulation layers using a carrier RF signal. Each modulation layer may be of a higher or lower order than the other modulation layers. Certain embodiments of the present invention may transmit different information on the different modulation layers. Other embodiments of the present invention may use the different layers for processing information differently.Type: GrantFiled: November 26, 2007Date of Patent: August 23, 2011Assignee: Nortel Networks LimitedInventors: David G. Steer, Curt Dodd, Ming Jia
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Patent number: 8005081Abstract: An Ethernet network comprises nodes which support a plurality of different forwarding modes. A range of VLAN Identifiers (VIDs) are allocated to each of the forwarding modes. Connections are configured between a source node and a destination node of the network using different forwarding modes. Packets carrying data traffic are sent to the destination node by selectively setting a VID in a packet to a first value, to transfer a packet via a first connection and a first forwarding mode, and a second value to transfer a packet via the second connection and the second forwarding mode. Packets received from both of the connections and sent on to an end-user. VLAN Identifiers can be allocated to different releases of functionality at nodes (e.g. software releases) such that packets are forwarded via a set of nodes supporting a first release, or via a set of nodes supporting a second release. It is possible to provide a controlled and disruption-free network evolution.Type: GrantFiled: December 21, 2007Date of Patent: August 23, 2011Assignee: Nortel Networks LimitedInventors: Nigel Bragg, David Allan, Simon Parry, Robert Friskney, Simon Brueckheimer
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Publication number: 20110200029Abstract: A method and system for identifying cell clusters within a coordinated multiple point wireless transmission network in order to reduce scheduling complexity while optimizing throughout and performance. The network includes a total number of cells served by corresponding base stations. The BSC divides the entire network of cells into clusters of cells and forwards this clustering information to all mobile devices. A cluster of cell candidates is a subset of the total number of cells within the network. The mobile device then provides to a base station controller the identity of a cluster of preferred cells selected from the cluster of cell candidates. The base station controller selects at least one base station located within the cluster of preferred cells to establish communication with the mobile device. A wireless connection is then established between the selected at least one base station and the mobile device.Type: ApplicationFiled: November 3, 2009Publication date: August 18, 2011Applicant: NORTEL NETWORKS LIMITEDInventors: Hamidreza Farmandar, Amir Keyvan Khandani, Mohammadhadi Baligh, Jianglei Ma, Aaron James Callard
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Publication number: 20110199982Abstract: In general, according to an embodiment, a wireless transmitter includes a plurality of coding and modulation modules to apply corresponding coding and modulation algorithms to input information blocks. A discrete Fourier transform (DFT) precoder applies DFT processing to outputs of the coding and modulation modules, and an inverse fast Fourier transform (IFFT) module receives a DFT output of the DFT precoder, which is mapped to different subcarriers according to the resource allocation indicated by the base station, and applies IFFT processing to the DFT output. An output processing stage produces output signals based on the output of the IFFT module to transmit wirelessly to a wireless receiver. In a different implementation, the outputs of the coding and modulation modules can be provided to an IFFT module to produce IFFT-processed output information.Type: ApplicationFiled: November 4, 2009Publication date: August 18, 2011Applicant: NORTEL NETWORKS LIMITEDInventors: Lai-King Tee, Yi Song, Neng Wang, Chuandong Li
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Publication number: 20110201374Abstract: Systems and methods are provided for delivering both PMP communications, for example standard cellular communications via a base station, and also delivering P2P communications, for example, communications between two mobile stations, using the same spectral resources for both types of communication.Type: ApplicationFiled: January 25, 2011Publication date: August 18, 2011Applicant: NORTEL NETWORKS LIMITEDInventors: SHALINI PERIYALWAR, HANG ZHANG, NIMAL SENARATH, DEREK YU, KELVIN KAR-KIN AU, KARL MANN
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Publication number: 20110199996Abstract: A method and system for allocating shareable wireless transmission resources. A resource pool is established. The resource pool is divided into a plurality of physical layer allocation units usable for wirelessly transmitting control information and traffic data. The allocation units are assigned at the media access control layer for the wireless transmission of the control information and traffic data. The system and method of the present invention also allows mobile stations to be dynamically grouped into multicast groupings to reduce system overhead resource requirements.Type: ApplicationFiled: April 25, 2011Publication date: August 18, 2011Applicant: NORTEL NETWORKS LIMITEDInventors: Hang Zhang, Jianglei Ma, Ming Jia, Mo-Han Fong, Peiying Zhu, Wen Tong
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Patent number: 8000601Abstract: A method and apparatus for securing an optical communication link includes the step of identifying a profile of the link by measuring, at the transmitter, optical back-reflections from optical pulses forwarded to a receiver. The profile is stored at the transmitter. Periodically during operation, such as during key exchange, more optical pulses are forwarded to the receiver, and the back reflections are collected as periodic profiles. The periodic profiles are compared against the stored profiles. Eavesdroppers, such as those who cut the fiber, tap the fiber, or implement a man in the middle attack, may be easily identified because the losses caused by their interference with the fiber will be evident in the periodic profiles.Type: GrantFiled: January 8, 2009Date of Patent: August 16, 2011Assignee: Nortel Networks LimitedInventors: Bruce Schofield, Franco Travostino, Indermohan Monga, Victor Flrolu
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Patent number: 8000243Abstract: One or more relay stations may be employed along a wireless communication access path between an ingress station and an egress station. A logical communication tunnel is established between the ingress and egress stations through any number of intermediate relay stations to handle session flows of PDUs. As PDUs arrive, the ingress station may determine and add scheduling information to the PDUs before they are delivered to the downstream intermediate relay stations or egress stations. The scheduling information is used by the downstream stations to schedule the PDUs for further delivery. The scheduling information may also be used by the egress station to schedule the PDUs for delivery. The scheduling information added to the PDU by the ingress station bears on a QoS class associated with the PDU, a deadline for the egress station to deliver the PDU, or a combination thereof.Type: GrantFiled: July 14, 2008Date of Patent: August 16, 2011Assignee: Nortel Networks LimitedInventors: Hang Zhang, Peiying Zhu, Wen Tong, Gamini Senarath, Derek Yu, David G. Steer
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Patent number: 8000236Abstract: A media proxy receive a first message from a near end of a path of a communications session, and before receiving a corresponding message from a far end, the media proxy is arranged to detect a blocking situation where another device in the path is awaiting the first message before forwarding the corresponding message. Detecting such a blocking situation enables it to be overcome, and enables the communication session to proceed. The media proxy can send a probe message to discover if there is another media proxy along the path causing the blocking. This is useful where the only information about the far end is the media path which is in the call set up, e.g. IP address and port. Sending the probe message can be under the control of a call server.Type: GrantFiled: October 1, 2009Date of Patent: August 16, 2011Assignee: Nortel Networks LimitedInventors: Julian Mitchell, Levay Louis, Cedric Aoun