Patents by Inventor Arnab Das

Arnab Das 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: 8547857
    Abstract: Systems and methodologies are described that facilitate scheduling uplink transmissions. For instance, a time sharing scheme can be utilized such that differing mobile devices can be scheduled to transmit during differing time slots; however, it is also contemplated that a static scheme can be employed. Pursuant to an illustration, an interference budget can be combined with a time varying weighting factor associated with a base station; the weighting factor can be predefined and/or adaptively adjusted (e.g., based upon a load balancing mechanism). Moreover, the weighted interference budget can be leveraged for selecting mobile devices for uplink transmission (e.g., based at least in part upon path loss ratios of the mobile devices). Further, disparate interference budgets can be utilized by differing channels of a sector at a particular time. Also, for example, a base station can assign a loading factor to be utilized by wireless terminal(s) for generating channel quality report(s).
    Type: Grant
    Filed: November 20, 2007
    Date of Patent: October 1, 2013
    Assignee: QUALCOMM Incorporated
    Inventors: Xinzhou Wu, Sundeep Rangan, Prashanth Hande, Arnab Das, Junyi Li
  • Publication number: 20130242888
    Abstract: An uplink dedicated control channel reporting structure includes a plurality of different bit size reports, e.g. 1 bit, 3 bit and 4 bit reports, for reporting a wireless terminal's backlog information of uplink traffic request group queues. Smaller bit size reports are transmitted more frequently than larger reports. A 1 bit request report indicates whether or not there are any MAC frames of information to be communicated in a set of two request group queues. A 3 bit request report indicates an amount of backlog information corresponding to a first set of request group queues and a second set of request group queues. A 4 bit request report indicates an amount of backlog information corresponding to a set of request group queues. The 4 bit request report is capable of reporting information on any of a plurality of uplink traffic channel request group queues being maintained by the wireless terminal.
    Type: Application
    Filed: September 14, 2012
    Publication date: September 19, 2013
    Applicant: QUALCOMM Incorporated
    Inventors: Arnab Das, Rajiv Laroia, Junyi Li
  • Patent number: 8532008
    Abstract: Embodiments of the present disclosure include systems, methods, and devices for managing power consumption in a wireless sensor network. Such embodiments may include a remote server, a wide area network coupled to the remote server, at least one access point device coupled to the remote server through the wide area network, one or more sensors coupled to each other and to the access point and datasinks through the network. Each datasink can be a data coordinator and receive sensor information from the one or more sensors and transmit sensor information to the at least access point. Further, a first set of sensors are configured to be routing sensors and a second set of sensors are configured end point sensors based on a graph theoretic algorithm to reduce transmitting power of each sensor and reduce overall power of the wireless sensor network, and configuring a first operational wireless sensor network.
    Type: Grant
    Filed: January 3, 2012
    Date of Patent: September 10, 2013
    Inventors: Arnab Das, Santanu Das
  • Publication number: 20130230027
    Abstract: A wireless terminal determines the transmission power used for its dedicated control channel at a point in time, and generates a power report indicating a ratio of a maximum wireless terminal transmit power to the transmit power of the dedicated control channel at the point in time. The power report provides a measure of available transmit power for wireless terminal use for other purposes, e.g., uplink traffic channels, after taking into consideration the transmit power used for the dedicated control channel. The point in time has a known time offset from the start of a communications segment in which the power report is transmitted. This allows the base station receiving dedicated control channel uplink signals from the wireless terminal to measure the received signals, receive and process the communicated power report, and correlate information to be used for accurate wireless terminal closed loop power control.
    Type: Application
    Filed: October 17, 2012
    Publication date: September 5, 2013
    Applicant: QUALCOMM INCORPORATED
    Inventors: Arnab Das, Sundeep Rangan
  • Patent number: 8514771
    Abstract: A wireless terminal determines the transmission power used for its dedicated control channel at a point in time, and generates a power report indicating a ratio of a maximum wireless terminal transmit power to the transmit power of the dedicated control channel at the point in time. The power report provides a measure of available transmit power for wireless terminal use for other purposes, e.g., uplink traffic channels, after taking into consideration the transmit power used for the dedicated control channel. The point in time has a known time offset from the start of a communications segment in which the power report is transmitted. This allows the base station receiving dedicated control channel uplink signals from the wireless terminal to measure the received signals, receive and process the communicated power report, and correlate information to be used for accurate wireless terminal closed loop power control.
    Type: Grant
    Filed: January 17, 2006
    Date of Patent: August 20, 2013
    Assignee: QUALCOMM Incorporated
    Inventors: Arnab Das, Sundeep Rangan
  • Patent number: 8503938
    Abstract: A wireless terminal receives and measures broadcast reference signals, e.g., beacon and/or pilot signals, transmitted from a plurality of base station attachment points. The wireless terminal monitors for and attempts to recover broadcast loading factor information corresponding to attachment points. The wireless terminal generates and transmits an interference report to a current attachment point, the report based on the results of a measured received reference signal from the current attachment point, a measured received reference signal from each of one or more different attachment points, and uplink loading factor information. In the absence of a successfully recovered broadcast uplink loading factor corresponding to an attachment point, the wireless terminal uses a default value for that loading factor.
    Type: Grant
    Filed: July 14, 2006
    Date of Patent: August 6, 2013
    Assignee: QUALCOMM Incorporated
    Inventors: Rajiv Laroia, Junyi Li, Sundeep Rangan, Murari Srinivasan, Prashanth Hande, Arnab Das
  • Patent number: 8477684
    Abstract: Techniques for sending control messages are described. In an aspect, assignment messages may be acknowledged based on either linked or dedicated acknowledgement (ACK) resources. A terminal may receive an assignment message from a base station, determine whether to acknowledge the assignment message, and determine ACK resources to use to acknowledge the assignment message. The ACK resources may be linked to a control block on which the assignment message was received, linked to resources given by the assignment message, or assigned to the terminal. The terminal may send the acknowledgement on the ACK resources. In another aspect, a control message may be acknowledged based on ACK resources determined based on the control message or the control block. The ACK resources may be linked to resources assigned by the control message or linked to the control message. The terminal may send an acknowledgement for the control message on the ACK resources.
    Type: Grant
    Filed: November 20, 2007
    Date of Patent: July 2, 2013
    Assignee: QUALCOMM Incorporated
    Inventors: Aamod Khandekar, Alexei Gorokhov, Avneesh Agrawal, Sundeep Rangan, Arnab Das
  • Patent number: 8437251
    Abstract: An uplink dedicated control channel reporting structure includes a plurality of different bit size reports, e.g. 1 bit, 3 bit and 4 bit reports, for reporting a wireless terminal's backlog information of uplink traffic request group queues. Smaller bit size reports are transmitted more frequently than larger reports. A 1 bit request report indicates whether or not there are any MAC frames of information to be communicated in a set of two request group queues. A 3 bit request report indicates an amount of backlog information corresponding to a first set of request group queues and a second set of request group queues. A 4 bit request report indicates an amount of backlog information corresponding to a set of request group queues. The 4 bit request report is capable of reporting information on any of a plurality of uplink traffic channel request group queues being maintained by the wireless terminal.
    Type: Grant
    Filed: January 17, 2006
    Date of Patent: May 7, 2013
    Assignee: QUALCOMM Incorporated
    Inventors: Arnab Das, Rajiv Laroia, Junyi Li
  • Publication number: 20130107761
    Abstract: Embodiments of the present disclosure include a system for managing cost in a wireless enabled advanced metering infrastructure (AMI). The system includes a remote server, a wide area network, and an access point device. The system further includes wireless enabled meters coupled to each other and to the access point through a neighborhood area network (NAN). The system includes datasinks. Each datasink is a wireless enabled meter capable of being a data coordinator and capable of receiving metering information from the sensors, processing metering information, and transmitting metering information to the access point. Moreover, each wireless enabled meter is capable of being a routing node and an endpoint node. Also, a first set of wireless enabled meters are configured to be routing nodes and a second set of wireless enabled meters are configured to be endpoint nodes based on a graph theoretic algorithm to reduce the cost of the AMI.
    Type: Application
    Filed: May 20, 2012
    Publication date: May 2, 2013
    Inventors: Arnab Das, Santanu Das
  • Publication number: 20130094398
    Abstract: Aspect of the present disclosure include A Mobile Ad Hoc Network (MANET) in which an intermediate relay node may engage in discreet packet-dropping practices for selfish (e.g., to conserve power) or other reasons. Each node in such a MANET has a dynamic reputation level known to all other nodes. Embodiments include improving the overall performance or robustness of such a MANET by adopting a routing strategy (e.g. routing protocol) which considers the reputation levels of intermediate relaying nodes in determining the best route from a source to a destination. Embodiments of the present disclosure also include a system for discovering a route between two nodes in a communication network. One or more nodes: (i) determine a reputation level of each neighboring node; (ii) sending a route discovery message that is addressed to the destination node to one neighboring node having a highest reputation level.
    Type: Application
    Filed: September 10, 2012
    Publication date: April 18, 2013
    Inventors: Arnab Das, Santanu Das
  • Patent number: 8411646
    Abstract: Systems and methodologies are described that facilitate scheduling uplink transmissions. For instance, a time sharing scheme can be utilized such that differing mobile devices can be scheduled to transmit during differing time slots; however, it is also contemplated that a static scheme can be employed. Pursuant to an illustration, an interference budget can be combined with a time varying weighting factor associated with a base station; the weighting factor can be predefined and/or adaptively adjusted (e.g., based upon a load balancing mechanism). Moreover, the weighted interference budget can be leveraged for selecting mobile devices for uplink transmission (e.g., based at least in part upon path loss ratios of the mobile devices). Further, disparate interference budgets can be utilized by differing channels of a sector at a particular time. Also, for example, a base station can assign a loading factor to be utilized by wireless terminal(s) for generating channel quality report(s).
    Type: Grant
    Filed: November 20, 2007
    Date of Patent: April 2, 2013
    Assignee: QUALCOMM Incorporated
    Inventors: Xinzhou Wu, Sundeep Rangan, Prashanth Hande, Arnab Das, Junyi Li
  • Patent number: 8406282
    Abstract: Systems and methodologies are described that facilitate generating and/or analyzing downlink transmission units in OFDM TDD environments. Strip OFDM symbols may be selectively inserted within downlink transmission units; for example, the position of strip OFDM symbols may vary from cell to cell. Further, the position may be a function of a characteristic of a cell (e.g., cell identifier) and/or an expected drift. Moreover, a strip OFDM symbol may be interjected at a location in a downlink transmission unit so as to mitigate alignment with disparate strip OFDM symbols in downlink transmission units associated with differing cells.
    Type: Grant
    Filed: September 19, 2007
    Date of Patent: March 26, 2013
    Assignee: QUALCOMM Incorporated
    Inventors: Junyi Li, Arnab Das, Rajiv Laroia
  • Patent number: 8379578
    Abstract: Systems and methodologies are described that facilitate communicating reverse link control information over OFDMA control channel(s) and CDMA control channel(s). Dedicated OFDMA control channel resources can be assigned to mobile device(s). Control information related to one or more logical control channels can be generated by a mobile device. Further, a physical control channel type (e.g., OFDMA control channel or a CDMA control channel) can be selected for sending the control information via the reverse link. For example, control information associated with periodic, logical control channels can be multiplexed and sent over the OFDMA control channel (e.g., utilizing the dedicated OFDMA control channel resources) while control information related to non-periodic, logical control channels can be transmitted over the CDMA control channel.
    Type: Grant
    Filed: November 27, 2007
    Date of Patent: February 19, 2013
    Assignee: QUALCOMM Incorporated
    Inventors: Alexei Gorokhov, Arnab Das, Aamod Khandekar, Junyi Li
  • Patent number: 8363592
    Abstract: A transmitter apparatus at a base station transmits program information using a plurality of carriers with at least some of the carriers having different transmit power levels. The carrier associated with the highest transmit power level conveys broadcast information carrying basic program information. A carrier associated with a lower power level conveys broadcast information including enhancement information and/or additional content. The enhancement information and/or additional content may include a higher level of video and/or audio resolution, additional video and/or audio content, support for additional languages, a text stream, and/or advertisements. A wireless terminal tunes, receives and processes the broadcast information. A wireless terminal can recover different levels of resolution of a broadcast program, e.g., a digital video broadcast program, and/or different amounts of additional content, depending upon which carriers are being used.
    Type: Grant
    Filed: March 7, 2006
    Date of Patent: January 29, 2013
    Assignee: QUALCOMM Incorporated
    Inventors: Rajiv Laroia, Arnab Das, Junyi Li
  • Patent number: 8340703
    Abstract: A multi-mode base station includes a transmit standby mode and an active mode. Transmit standby mode of base station operation is a low power/low interference level of operation as compared to active mode. In transmit standby mode at least some of the synchronization signaling such as pilot tone signaling is reduced in power level and/or rate with respect to the active mode. In transmit standby mode, the base station has no active state registered wireless terminals being serviced but may have some sleep state registered wireless terminals being serviced. Mode transitions from active to transmit standby may be in response to: a detected period of inactivity, scheduling information, base station mode change signals, and/or detected wireless terminal state transition. Mode transitions from transmit standby to active may be in response to: scheduling information, access signals, wake-up signals, hand-off signals, wireless terminal state change signals, and/or base station mode change signals.
    Type: Grant
    Filed: July 9, 2010
    Date of Patent: December 25, 2012
    Assignee: QUALCOMM Incorporated
    Inventors: Rajiv Laroia, Pablo Anigstein, Arnab Das, Sundeep Rangan
  • Patent number: 8335196
    Abstract: Systems and methodologies are described that facilitate supporting narrowband and wideband operation within a wideband wireless communication environment. For example, wideband operation can be enhanced by enabling faster communication of information as compared to narrowband operation, transfer of supplemental data available to wideband devices, and the like. Pursuant to another example, timing of information transfer can be scheduled over a plurality of subbands to enable a narrowband device to obtain a set of information over one of the subbands during a set of time intervals, while a wideband device can receive the set of information over the plurality of subbands during a reduced set of time intervals.
    Type: Grant
    Filed: September 17, 2007
    Date of Patent: December 18, 2012
    Assignee: QUALCOMM Incorporated
    Inventors: Arnab Das, Pablo Alejandro Anigstein
  • Patent number: 8320928
    Abstract: Systems and methodologies are described that facilitate scheduling uplink transmissions. For instance, a time sharing scheme can be utilized such that differing mobile devices can be scheduled to transmit during differing time slots; however, it is also contemplated that a static scheme can be employed. Pursuant to an illustration, an interference budget can be combined with a time varying weighting factor associated with a base station; the weighting factor can be predefined and/or adaptively adjusted (e.g., based upon a load balancing mechanism). Moreover, the weighted interference budget can be leveraged for selecting mobile devices for uplink transmission (e.g., based at least in part upon path loss ratios of the mobile devices). Further, disparate interference budgets can be utilized by differing channels of a sector at a particular time. Also, for example, a base station can assign a loading factor to be utilized by wireless terminal(s) for generating channel quality report(s).
    Type: Grant
    Filed: August 26, 2011
    Date of Patent: November 27, 2012
    Assignee: QUALCOMM Incorporated
    Inventors: Xinzhou Wu, Sundeep Rangan, Prashanth Hande, Arnab Das, Junyi Li
  • Publication number: 20120294258
    Abstract: Certain aspects of the present disclosure relate to a technique of designing a Media Access Control (MAC) scheduler for uplink communication in high rate wireless data systems, such as Long Term Evolution (LTE) wireless communication systems.
    Type: Application
    Filed: July 24, 2012
    Publication date: November 22, 2012
    Applicant: QUALCOMM INCORPORATED
    Inventors: Siddharth Ray, Ritesh K. Madan, Ashwin Sampath, Sundeep Rangan, Arnab Das
  • Patent number: 8289933
    Abstract: A method is described for transmitting information in a communication channel of a wireless communication system in which the communication channel is divided into a plurality of time slots of equal duration and each of the time slots is further sub-divided into multiple sub-slots or resource units. In one illustrative embodiment, the communication channel is divided into time slots according to a time division multiple access scheme. Each time slot is then further code-multiplexed into one or more sub-slots according to a code division multiple access scheme. Each of the sub-slots is therefore capable of carrying a separately coded transmission within the communication channel so that multiple simultaneous transmissions can occur in any given time slot.
    Type: Grant
    Filed: October 18, 2001
    Date of Patent: October 16, 2012
    Assignee: Alcatel Lucent
    Inventors: Arnab Das, Farooq Ullah Khan
  • Patent number: 8265019
    Abstract: Systems and methodologies are described that facilitate dynamically adjusting scheduling priorities in relation to a combination of delay sensitive flows with delay requirements and best effort flows. The systems and methodologies provide optimal and efficient techniques to enable real time adjustment and assignment of bandwidth for a combination of best effort flows and delay sensitive flows. In particular, the bandwidth allocation is adjusted for each data packet such that delay requirements are met and the remaining bandwidth can be assigned to best effort flows.
    Type: Grant
    Filed: October 30, 2008
    Date of Patent: September 11, 2012
    Assignee: QUALCOMM Incorporated
    Inventors: Ritesh K. Madan, Arnab Das, Sundeep Rangan, Siddharth Ray