Patents by Inventor Diptendu Mitra

Diptendu Mitra 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).

  • Publication number: 20160242178
    Abstract: A method of signalling resource allocation data in a communication system which uses a plurality of sub-carriers arranged in a sequence of chunks. An allocation of the sub-carriers for each of a plurality of user devices is received. The received allocations are processed to determine, for each user device, data identifying a start chunk and an end chunk within the sequence of chunks, which depend upon the sub-carriers allocated to the user device. Different resource allocation data is generated for each of the user devices using a predetermined mapping which relates the data identifying the corresponding start chunk and end chunk determined by the processing step to resource allocation data comprising a unique value. The respective resource allocation data is signaled to each of the plurality of user devices.
    Type: Application
    Filed: March 9, 2016
    Publication date: August 18, 2016
    Applicant: NEC CORPORATION
    Inventors: Robert ARNOTT, Diptendu MITRA
  • Patent number: 9319206
    Abstract: A method of signalling resource allocation data in a communication system which uses a plurality of sub-carriers arranged in a sequence of chunks. An allocation of the sub-carriers for each of a plurality of user devices is received. The received allocations are processed to determine, for each user device, data identifying a start chunk and an end chunk within the sequence of chunks, which depend upon the sub-carriers allocated to the user device. Different resource allocation data is generated for each of the user devices using a predetermined mapping which relates the data identifying the corresponding start chunk and end chunk determined by the processing step to resource allocation data comprising a unique value. The respective resource allocation data is signaled to each of the plurality of user devices.
    Type: Grant
    Filed: September 23, 2011
    Date of Patent: April 19, 2016
    Assignee: NEC CORPORATION
    Inventors: Robert Arnott, Diptendu Mitra
  • Patent number: 9107210
    Abstract: A method of communicating control information, performed by a communication device in a mobile telecommunication system in which each of a plurality of communication devices are allocated plural orthogonal frequency-division multiplexing (OFDM) resource allocation, includes receiving, in a control channel, from a base station and over an E-UTRA air interface, control information identifying a resource allocation including frequencies of a shared data channel, and receiving, in the identified resource allocation including frequencies of the shared data channel, from a base station and over an E-UTRA air interface, control information identifying a further resource allocation including frequencies to be used for the transmission of data in the shared data channel.
    Type: Grant
    Filed: January 14, 2013
    Date of Patent: August 11, 2015
    Assignee: NEC CORPORATION
    Inventors: Diptendu Mitra, Robert Arnott
  • Patent number: 8897239
    Abstract: A method of signalling resource allocation data in a communication system which uses a plurality of sub-carriers arranged in a sequence of chunks includes receiving an allocation of the sub-carriers for each of a plurality of user devices, which received allocation identifies a type of allocation of the sub-carriers. The received allocations are processed, in dependence on the identified type of allocation, to determine, for each user device, data identifying a start chunk and an end chunk within the sequence of chunks, which depend upon the sub-carriers allocated to the user device. Different resource allocation data is generated for each of the user devices using the data identifying the corresponding start chunk and end chunk determined by the processing, the resource allocation data including type data identifying the type of allocation. The respective resource allocation data is signaled to each of the plurality of user devices.
    Type: Grant
    Filed: September 23, 2011
    Date of Patent: November 25, 2014
    Assignee: NEC Corporation
    Inventors: Robert Arnott, Diptendu Mitra
  • Patent number: 8885580
    Abstract: A method of signaling resource allocation data in a communication system which uses a plurality of sub-carriers arranged in a sequence of chunks includes receiving an allocation of the sub-carriers for each of a plurality of user devices. The received allocations are processed to determine, for each user device, data identifying a start chunk and an end chunk within the sequence of chunks, which depend upon the sub-carriers allocated to the user device. Different resource allocation data are generated for each of the user devices using the data identifying the corresponding start chunk and end chunk determined by the processing, the resource allocation data including a bit pattern which defines a grouping of the sequence of chunks into a sequence of groups, in dependence upon the sub-carriers allocated to each user device. The respective resource allocation data is signaled to each of the plurality of user devices.
    Type: Grant
    Filed: September 23, 2011
    Date of Patent: November 11, 2014
    Assignee: NEC Corporation
    Inventors: Robert Arnott, Diptendu Mitra
  • Publication number: 20130322353
    Abstract: A method of communicating control information, performed by a communication device in a mobile telecommunication system in which each of a plurality of communication devices are allocated plural orthogonal frequency-division multiplexing (OFDM) resource allocation, includes receiving, in a control channel, from a base station and over an E-UTRA air interface, control information identifying a resource allocation including frequencies of a shared data channel, and receiving, in the identified resource allocation including frequencies of the shared data channel, from a base station and over an E-UTRA air interface, control information identifying a further resource allocation including frequencies to be used for the transmission of data in the shared data channel.
    Type: Application
    Filed: January 14, 2013
    Publication date: December 5, 2013
    Applicant: NEC CORPORATION
    Inventors: Diptendu Mitra, Robert Arnott
  • Patent number: 8355736
    Abstract: A method of communicating control information performed by a communication device in a mobile telecommunication system in which each of a plurality of communication devices are allocated plural orthogonal frequency-division multiplexing (OFDM) resource allocations, the method including receiving, in a control channel, from a base station and over an E-UTRA air interface, control information identifying a frequency resource allocation in a shared data channel, and receiving, in the identified frequency resource allocation in the shared data channel, from a base station and over an E-UTRA air interface, control information identifying a further frequency resource allocation.
    Type: Grant
    Filed: June 16, 2011
    Date of Patent: January 15, 2013
    Assignee: NEC Corporation
    Inventors: Diptendu Mitra, Robert Arnott
  • Patent number: 8310998
    Abstract: Efficient encoding techniques are described for encoding resource allocation data to be signalled to a number of user devices in a communication system. In one encoding technique, a resource allocation bit pattern is transmitted to all the users together with a resource ID for each user. Each user then identifies its allocated sub-carriers using the received allocation bit pattern and the received resource ID. In another encoding technique, a code tree is used to generate a value representing the sub-carrier allocation. The user device then uses the code tree to determine the sub-carrier allocation from the signalled value.
    Type: Grant
    Filed: March 20, 2007
    Date of Patent: November 13, 2012
    Assignee: NEC Corporation
    Inventors: Robert Arnott, Diptendu Mitra
  • Publication number: 20120269157
    Abstract: A method of signalling resource allocation data in a communication system which uses a plurality of sub-carriers arranged in a sequence of chunks. An allocation of the sub-carriers for each of a plurality of user devices is received. The received allocations are processed to determine, for each user device, data identifying a start chunk and an end chunk within the sequence of chunks, which depend upon the sub-carriers allocated to the user device. Different resource allocation data is generated for each of the user devices using the data identifying the corresponding start chunk and end chunk determined by the processing. The respective resource allocation data is signaled to each of the plurality of user devices.
    Type: Application
    Filed: July 3, 2012
    Publication date: October 25, 2012
    Applicant: NEC Corporation
    Inventors: Robert Arnott, Diptendu Mitra
  • Publication number: 20120250633
    Abstract: A method of signalling resource allocation data in a communication system which uses a plurality of sub-carriers arranged in a sequence of chunks. An allocation of the sub-carriers for each of a plurality of user devices is received. The received allocations are processed to determine, for each user device, data identifying a start chunk and an end chunk within the sequence of chunks, which depend upon the sub-carriers allocated to the user device. Different resource allocation data is generated for each of the user devices using a predetermined mapping which relates the data identifying the corresponding start chunk and end chunk determined by the processing step to resource allocation data comprising a unique value. The respective resource allocation data is signaled to each of the plurality of user devices.
    Type: Application
    Filed: September 23, 2011
    Publication date: October 4, 2012
    Applicant: NEC CORPORATION
    Inventors: Robert Arnott, Diptendu Mitra
  • Publication number: 20120250634
    Abstract: A method of signalling resource allocation data in a communication system which uses a plurality of sub-carriers arranged in a sequence of chunks includes receiving an allocation of the sub-carriers for each of a plurality of user devices, which received allocation identifies a type of allocation of the sub-carriers. The received allocations are processed, in dependence on the identified type of allocation, to determine, for each user device, data identifying a start chunk and an end chunk within the sequence of chunks, which depend upon the sub-carriers allocated to the user device. Different resource allocation data is generated for each of the user devices using the data identifying the corresponding start chunk and end chunk determined by the processing, the resource allocation data including type data identifying the type of allocation. The respective resource allocation data is signaled to each of the plurality of user devices.
    Type: Application
    Filed: September 23, 2011
    Publication date: October 4, 2012
    Applicant: NEC CORPORATION
    Inventors: Robert Arnott, Diptendu Mitra
  • Publication number: 20120176988
    Abstract: A communication method which uses a plurality of sub-carriers, the method includes receiving uplink data from one or more user devices and generating corresponding ACK/NACK messages for the received data, forming control data defining an allocation of the sub-carriers for each of a plurality of user devices, transmitting the control data to the user devices, determining the sub-carriers to be used to transmit the ACK/NACK messages to a user device in dependence upon sub-carriers allocated to that user device, and transmitting the ACK/NACK messages to the corresponding user devices using the determined sub-carriers, wherein the control data for each user device is transmitted over a control channel using a first subset of the plurality of sub-carriers and the ACK/NACK messages for each user device are transmitted over an ACK/NACK channel that is separate from the control channel using a second different subset of the plurality of sub-carriers.
    Type: Application
    Filed: March 5, 2012
    Publication date: July 12, 2012
    Applicant: NEC CORPORATION
    Inventors: Diptendu MITRA, Yassin Aden Awad
  • Publication number: 20120163330
    Abstract: A communication method which uses a plurality of sub-carriers grouped in a sequence of chunks, the method includes receiving uplink data from one or more user devices and generating corresponding ACK/NACK messages for the received data, forming control data defining an allocation of one or more chunks of the sub-carriers for each of a plurality of user devices, transmitting the control data to the user devices, and transmitting the ACK/NACK messages to the corresponding user devices, wherein the control data for each user device is transmitted over a control channel using a first subset of the plurality of sub-carriers and the ACK/NACK messages for each user device are transmitted over an ACK/NACK channel that is separate from the control channel using a second different subset of the plurality of sub-carriers.
    Type: Application
    Filed: March 5, 2012
    Publication date: June 28, 2012
    Applicant: NEC CORPORATION
    Inventors: Diptendu MITRA, Yassin Aden Awad
  • Patent number: 8195186
    Abstract: Resource allocation information is signalled to user devices (UE1, UE2, UE3, UE4) in a mobile telecommunications communications system in which each user device is allocated plural resource allocations (RB) in a TTI (50) by, for each user device, providing information (I1) regarding a selected resource allocation allocated to that user device in a control channel (L1, L2, L3, L4) and providing information (I2, I3) regarding at least one other resource allocation allocated to that user device in a data channel (52) in the selected resource allocation. In one example, the selected resource allocation is the first resource allocation (RB1) allocated to that user device (UE1) and information regarding each successive further resource allocation is provided in a data channel in the resource allocation preceding that successive further resource allocation.
    Type: Grant
    Filed: November 1, 2007
    Date of Patent: June 5, 2012
    Assignee: NEC Corporation
    Inventors: Diptendu Mitra, Robert Arnott
  • Publication number: 20120076083
    Abstract: A method of signalling resource allocation data in a communication system which uses a plurality of sub-carriers arranged in a sequence of chunks includes receiving an allocation of the sub-carriers for each of a plurality of user devices. The received allocations are processed to determine, for each user device, data identifying a start chunk and an end chunk within the sequence of chunks, which depend upon the sub-carriers allocated to the user device. Different resource allocation data are generated for each of the user devices using the data identifying the corresponding start chunk and end chunk determined by the processing, the resource allocation data including a bit pattern which defines a grouping of the sequence of chunks into a sequence of groups, in dependence upon the sub-carriers allocated to each user device. The respective resource allocation data is signaled to each of the plurality of user devices.
    Type: Application
    Filed: September 23, 2011
    Publication date: March 29, 2012
    Applicant: NEC CORPORATION
    Inventors: Robert Arnott, Diptendu Mitra
  • Publication number: 20110250898
    Abstract: A method of communicating control information performed by a communication device in a mobile telecommunication system in which each of a plurality of communication devices are allocated plural orthogonal frequency-division multiplexing (OFDM) resource allocations, the method including receiving, in a control channel, from a base station and over an E-UTRA air interface, control information identifying a frequency resource allocation in a shared data channel, and receiving, in the identified frequency resource allocation in the shared data channel, from a base station and over an E-UTRA air interface, control information identifying a further frequency resource allocation.
    Type: Application
    Filed: June 16, 2011
    Publication date: October 13, 2011
    Applicant: NEC CORPORATION
    Inventors: Diptendu Mitra, Robert Arnott
  • Publication number: 20100290405
    Abstract: Efficient encoding techniques are described for encoding resource allocation data to be signalled to a number of user devices in a communication system. In one encoding technique, a resource allocation bit pattern is transmitted to all the users together with a resource ID for each user. Each user then identifies its allocated sub-carriers using the received allocation bit pattern and the received resource ID. In another encoding technique, a code tree is used to generate a value representing the sub-carrier allocation. The user device then uses the code tree to determine the sub-carrier allocation from the signalled value.
    Type: Application
    Filed: March 20, 2007
    Publication date: November 18, 2010
    Inventors: Robert Arnott, Diptendu Mitra
  • Publication number: 20100238870
    Abstract: A communications system is described in which user devices are allocated sub-carriers on which to transmit uplink data to a base station. ACK/NACK messages for the data transmitted on the uplink are then transmitted by the base station on sub-carriers that depend on the sub-carriers used to carry the uplink data. A direct mapping function is preferably used to determine the sub-carriers to be used for the ACK/NACK messages from the uplink sub-carriers. In another embodiment, the ACK/NACK messages are transmitted to the user devices on sub-carriers that are previously identified to the user devices, preferably by transmitting one or more index values to the user device in a control channel thereof.
    Type: Application
    Filed: June 13, 2007
    Publication date: September 23, 2010
    Inventors: Diptendu Mitra, Yassin Aden Awad
  • Publication number: 20100069081
    Abstract: Resource allocation information is signalled to user devices (UE1, UE2, UE3, UE4) in a mobile telecommunications communications system in which each user device is allocated plural resource allocations (RB) in a TTI (50) by, for each user device, providing information (I1) regarding a selected resource allocation allocated to that user device in a control channel (L1, L2, L3, L4) and providing information (I2, I3) regarding at least one other resource allocation allocated to that user device in a data channel (52) in the selected resource allocation. In one example, the selected resource allocation is the first resource allocation (RB1) allocated to that user device (UE1) and information regarding each successive further resource allocation is provided in a data channel in the resource allocation preceding that successive further resource allocation.
    Type: Application
    Filed: November 1, 2007
    Publication date: March 18, 2010
    Inventors: Diptendu Mitra, Robert Arnott