Patents by Inventor Subramanian Vasudevan

Subramanian Vasudevan 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).

  • Patent number: 8811334
    Abstract: In a method for configuring a wireless network, a radio access network establishes a first color code for a femto subnet and a second color code for a macro subnet. The femto subnet includes a plurality of femto cells, and the macro subnet includes at least one macro cell. The macro subnet borders the femto subnet. The radio access network identifies the plurality of femto cells bordering the macro subnet, and assigns the established first and second color codes to the identified border femto cells, while assigning only the first color code to non-bordering femto cells.
    Type: Grant
    Filed: January 10, 2008
    Date of Patent: August 19, 2014
    Assignee: Alcatel Lucent
    Inventors: Subramanian Vasudevan, Jialin Zou
  • Patent number: 8804662
    Abstract: For handover between wireless telecommunications networks of different technology types, an air interface is set up between a first node 4 included in a network of a first technology type and a second node 10 included in a network of a second different technology type. Signaling messaging, in accordance with the second technology type, is related to handover of a mobile terminal from the network of the first technology type to the network of the second technology type. The signaling messaging is encapsulated in a container for transmission over the signaling interface. An identifier is associated with the container to indicate that it encapsulates the signaling messaging. When the identifier is detected at the first node, the container is sent over the interface to the second node. In one method in accordance with the invention, the first technology type is WiMAX and the identifier is a special service flow identifier. This may be detected at an Access Services Network Gateway (ASN GW), for example.
    Type: Grant
    Filed: March 13, 2009
    Date of Patent: August 12, 2014
    Assignee: Alcatel Lucent
    Inventors: Violeta Cakulev, Michael Francis Dolan, Subramanian Vasudevan, Lily H. Zhu
  • Publication number: 20140206359
    Abstract: A method for managing a network includes determining whether to transfer data between a terminal and a controller of a first cell or between the terminal and a controller of a second cell based on at least one traffic parameter of the terminal. The first cell has a first size and the second cell has a second size different from the first size, and the network is a heterogeneous network. The method also includes a multi-streaming operation in which different portions of requested content is transmitted to the terminal through controllers of the different cell areas based on the traffic parameter of the terminal.
    Type: Application
    Filed: January 21, 2013
    Publication date: July 24, 2014
    Applicant: Alcatel-Lucent USA Inc.
    Inventors: Subramanian VASUDEVAN, Rahul PUPALA, Sivarama VENKATESAN
  • Publication number: 20140199945
    Abstract: Successfully decoded data received from a mobile terminal as well as the transmission format of that data is relayed over the backhaul from a base station receiver that successfully decoded the mobile terminal's transmission to the base stations in the mobile terminal's active set that presumably were unable to decode the mobile terminal's transmission due to inadequate signal-to-noise ratio. A base station that receives this transmission from the relaying base station that did successfully decode and demodulate the mobile terminal's transmission is then able to reconstruct the data and subtract it from the total interference, thereby increasing the signal-to-noise ratio at this base station for its in-cell processing.
    Type: Application
    Filed: March 17, 2014
    Publication date: July 17, 2014
    Applicant: ALCATEL-LUCENT USA INC.
    Inventors: Shirish Nagaraj, Subramanian Vasudevan
  • Publication number: 20140200022
    Abstract: A method of determining a mobility state of a user equipment (UE) in a wireless communications network, the method comprising: obtaining, at a first device, a first speed measurement, the first speed measurement being a measurement of a radial speed of the UE relative to a first network element; obtaining, at the first device, one or more second speed measurements corresponding, respectively, to one or more second network elements, each of the one or more second speed measurements being a measurement of a radial speed of the UE relative to the corresponding one of the one or more second network elements; generating, at the first device, a comparison result based on the first speed measurement and the one or more second speed measurements; and determining the mobility state of the UE based on the comparison result.
    Type: Application
    Filed: January 17, 2013
    Publication date: July 17, 2014
    Applicant: Alcatel-Lucent USA Inc.
    Inventors: Kathiravetpillai SIVANESAN, Jialin ZOU, Subramanian VASUDEVAN
  • Publication number: 20140160950
    Abstract: A method of facilitating path switching, for a communication path between a first user equipment (UE) and a second UE, from a device to device (D2D) path to network path, includes receiving switch point information from the first UE that identifies a data block; establishing, at the access network, a connection with the first UE over an uplink path between the first UE and the access network; establishing, at the access network, a connection with the second UE over a downlink path between the network element and the second UE; setting, at the access network, a data block sequencing numbering to be the same for the uplink path and the downlink path based on the switch point information; and forwarding, at the access network, data from the first UE to the second UE via the network path, the network path including the uplink path and the downlink path.
    Type: Application
    Filed: December 7, 2012
    Publication date: June 12, 2014
    Applicant: Alcatel-Lucent USA Inc.
    Inventors: Subramanian VASUDEVAN, Jialin ZOU, Sudeep PALAT
  • Patent number: 8700042
    Abstract: Successfully decoded data received from a mobile terminal as well as the transmission format of that data is relayed over the backhaul from a base station receiver that successfully decoded the mobile terminal's transmission to the base stations in the mobile terminal's active set that presumably were unable to decode the mobile terminal's transmission due to inadequate signal-to-noise ratio. A base station that receives this transmission from the relaying base station that did'successfully decode and demodulate the mobile terminal's transmission is then able to reconstruct the data and subtract it from the total interference, thereby increasing the signal-to-noise ratio at this base station for its in-cell processing.
    Type: Grant
    Filed: April 21, 2006
    Date of Patent: April 15, 2014
    Assignee: Alcatel Lucent
    Inventors: Shirish Nagaraj, Subramanian Vasudevan
  • Patent number: 8675550
    Abstract: An enhanced access terminal (AT) that can serve as a “proxy wireless over-the-air backhaul or relay” is provided, to connect a base station with no backhaul to its neighboring fully functional base station that is connected to the NMS. In a further embodiment, an architecture and protocol for storing and retrieving data at the base station lacking backhaul is provided, and, using that information, a mechanism by which the ATR can communicate the format information to the source to improve interference cancellation at the base station lacking backhaul, and neighboring base stations, due to backhaul transmission from the AT's routing and relaying capability.
    Type: Grant
    Filed: December 31, 2008
    Date of Patent: March 18, 2014
    Assignee: Alcatel Lucent
    Inventors: Sudarshan A Rao, Subramanian Vasudevan, Jialin Zou
  • Patent number: 8676215
    Abstract: A method is provided a wireless system for providing an interference suppression zone in a portion of the macro cell coverage area bordering the small-cell coverage area for a small cell, but outside that small-cell coverage area. The transmission power of a UE located within the interference suppression zone is minimized to minimize the inter-cell interference to the small cells. The invention methodology further operates to enhance the redirection/redistribution methods of the art for UEs located in the interference suppression zone, further reducing macro to small cell interference. In further embodiments of the invention, methods are provided for determining the scope of an interference suppression zone and for determining proximity of an UE to the interference suppression zone.
    Type: Grant
    Filed: November 24, 2010
    Date of Patent: March 18, 2014
    Assignee: Alcatel Lucent
    Inventors: Jialin Zou, Subramanian Vasudevan
  • Publication number: 20140044024
    Abstract: At least one example embodiment discloses a method of controlling direct user equipment communications. The method includes receiving reports from a first user equipment (UE) and a second UE, respectively, the first and second UEs communicating with a serving base station, determining at least one control channel and at least one data channel for a direct communication between the first UE and the second UE, allocating at least one resource block for the direct communication link between the first UE and the second UE based on the determining and transmitting a configuration message to the first UE and the second UE, the configuration message indicating the allocated resource block and permitting at least one of the first UE and the second UE to determine parameters of the direct communication link.
    Type: Application
    Filed: August 10, 2012
    Publication date: February 13, 2014
    Applicant: ALCATEL-LUCENT USA INC.
    Inventors: Jialin ZOU, Subramanian VASUDEVAN
  • Publication number: 20130336230
    Abstract: In one embodiment, the method for offloading communications of a first base station includes determining that a first user equipment (UE) and a second UE are candidates for direct communications. The method further includes notifying the first UE and the second UE that the first UE and the second UE are candidates for direct communications based on the determining. The method further includes receiving a report that the first UE and the second UE are able to engage in direct communications with each other. The method further includes allocating at least one uplink block to direct communications between the first UE and the second UE.
    Type: Application
    Filed: June 14, 2012
    Publication date: December 19, 2013
    Applicant: ALCATEL-LUCENT USA INC.
    Inventors: Jialin Zou, Subramanian Vasudevan
  • Publication number: 20130322345
    Abstract: In one embodiment, the method of allocating network resources by a base station of a network includes allocating at least two blocks of an uplink channel of the network to a direct communication link between a first user equipment (UE) and a second UE. The method further includes determining that a rate of data transfer on the direct communication link is greater than a rate of data transfer for uplink communications between one of (i) the first UE and base station and (ii) the second UE and the base station. The method further includes re-allocating, based on the determining, at least one of the at least two uplink blocks allocated to the direct communication link to at least one of uplink communications by the first UE, the second UE, or other UEs with the base station.
    Type: Application
    Filed: May 31, 2012
    Publication date: December 5, 2013
    Applicant: ALCATEL-LUCENT USA INC.
    Inventors: Subramanian Vasudevan, Kathiravetpillai Sivanesan
  • Publication number: 20130250764
    Abstract: A method of setting an almost blank subframe (ABS) duty cycle in a heterogeneous network including a macro cell and one or more small cells, the one or more small cells being underlaid with respect to the macro cell includes obtaining, at a network element, loading information corresponding to each of the macro cell and the one or more small cells, the loading information including, for each of the macro cell and the one or more small cells, an indication of an amount of information buffered at the cell for each user attached to the cell; and determining the ABS duty cycle based on the obtained loading information.
    Type: Application
    Filed: March 22, 2012
    Publication date: September 26, 2013
    Applicant: ALCATEL-LUCENT USA INC.
    Inventors: Subramanian Vasudevan, Rahul N. Pupala, Kathiravetpillai Sivanesan
  • Publication number: 20130254277
    Abstract: At least one example embodiment discloses a method of controlling communications between first and second user equipments (UEs) by a base station in a network. The method includes obtaining an indication, the indication indicating if the first and second UEs are within a communication range of each other and controlling a direct communication link between the first and second UEs if the first and second UEs are within a communication range of each other. The controlling includes allocating at least a first portion of an uplink channel of the network to the direct communication link.
    Type: Application
    Filed: March 21, 2012
    Publication date: September 26, 2013
    Applicant: ALCATEL-LUCENT USA INC.
    Inventors: Subramanian Vasudevan, Ioannis Broustis, Violeta Cakulev, Semyon Mizikovsky, Ganesh Sundaram
  • Patent number: 8532660
    Abstract: The present invention provides embodiments of methods for directing traffic between cells of different sizes. One embodiment of the method includes determining, at a mobile unit, whether to hand off from a source cell to a target cell based on information indicating sizes of coverage areas of the source cell and the target cell.
    Type: Grant
    Filed: July 16, 2010
    Date of Patent: September 10, 2013
    Assignee: Alcatel Lucent
    Inventors: Jialin Zou, Subramanian Vasudevan
  • Patent number: 8520559
    Abstract: An access-terminal routing methodology is provided that may be used to enable a wireless, meshed backhaul between base stations using existing wireless-access resources (time, bandwidth, code-space, power), protocols, and base station infrastructure. Accordingly, the invention provides a means to extend the coverage of existing networks by adding standalone base stations without wired or specialized wireless backhaul.
    Type: Grant
    Filed: September 30, 2008
    Date of Patent: August 27, 2013
    Assignee: Alcatel Lucent
    Inventors: Sudarshan A Rao, Subramanian Vasudevan
  • Patent number: 8509213
    Abstract: Provided is a method that includes determining a binary sequence based on a number of symbols in a frame associated with a macro cell. The method further includes performing an autocorrelation calculation on the binary sequence. The method further includes determining a time offset based on minimum values of the autocorrelation calculation. The method further includes broadcasting a control signal including the time offset to a plurality of small cells. The method further includes receiving the control signal including the time offset associated with the frame associated with the macro cell. The method further includes transmitting a frame associated with a small cell synchronized with a frame associated with the macro cell and offset in time by the time offset.
    Type: Grant
    Filed: March 1, 2010
    Date of Patent: August 13, 2013
    Assignee: Alcatel Lucent
    Inventors: Kathiravetpillai Sivanesan, Subramanian Vasudevan
  • Patent number: 8493941
    Abstract: A mobile terminal is controlled via over-the-air feedback so as to enable its data transmissions to be independently and successfully decoded at each of the base stations in its active set absent a transmit power limitation or data retransmission limit. Using the decoded data, the channel is re-estimated and the waveform received from the mobile terminal is reconstructed and subtracted from the total interference at each base station in the active set where decoding has been successful. As a result, transmissions from other mobile terminals, which have yet to be successfully decoded at such a base station, will experience a higher signal-to-noise ratio and thus an increased likelihood of being successfully decoded.
    Type: Grant
    Filed: April 21, 2006
    Date of Patent: July 23, 2013
    Assignee: Alcatel Lucent
    Inventors: Shirish Nagaraj, Subramanian Vasudevan
  • Patent number: 8489102
    Abstract: In a method for locating a mobile station, a first sub-paging zone for paging the mobile station is selected in response to an incoming call intended for the mobile station if a trigger code associated with a first femto cell matches a first trigger code associated with femto cells included in the first sub-paging zone. The first femto cell is a femto cell with which the mobile station has most recently registered. The first sub-paging zone is defined based on a location of ones of a subset of the plurality of femto cells. The mobile station within the first sub-paging zone is paged to locate the mobile station.
    Type: Grant
    Filed: October 12, 2007
    Date of Patent: July 16, 2013
    Assignee: Alcatel Lucent
    Inventors: Subramanian Vasudevan, Jialin Zou
  • Patent number: 8442442
    Abstract: Example methods use secondary scrambling codes in telecommunications networks. The secondary scrambling codes are assigned to mobile stations and channels used by mobile stations that are not adversely affected by the use of secondary scrambling codes. By assigning secondary scrambling codes additional users can utilize telecommunications networks with unique scrambling codes without reducing quality of service or increasing resource consumption. Example methods also reduce interference between mobile stations in the telecommunications networks.
    Type: Grant
    Filed: October 29, 2009
    Date of Patent: May 14, 2013
    Assignee: Alcatel Lucent
    Inventors: Pantelis Monogioudis, Subramanian Vasudevan