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).
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Patent number: 7826863Abstract: Systems and methodologies are described that facilitate allocating power levels in a wireless communication network. A metric based upon spectral efficiency can be employed in connection with optimizing power allocation. Further, power for transmitters to utilize can be assigned as a function of time. Moreover, a single sub-carrier network and/or a multiple sub-carrier networks can leverage one or more power allocation schemes.Type: GrantFiled: September 13, 2007Date of Patent: November 2, 2010Assignee: QUALCOMM IncorporatedInventors: Xinzhou Wu, Arnab Das, Junyi Li
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Patent number: 7818023Abstract: Systems and methodologies are described that facilitate and effectuate power allocation schemes that reuse power allocation patterns amongst different carriers for sectors in the same cell and uses different power allocation patterns between cells. The frequency reuse scheme generates power allocation patterns, selects one of the generated power allocation patterns for use among at least two carriers of at least two sectors in a cell, and employs a second disparate power allocation pattern for use between at two cells.Type: GrantFiled: September 26, 2007Date of Patent: October 19, 2010Assignee: QUALCOMM IncorporatedInventors: Junyi Li, Arnab Das, Xinzhou Wu
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Publication number: 20100220626Abstract: Methods and apparatus for communicating transmission backlog information are described. Reporting control factors are utilized to expand reporting possibilities for a fixed bit size request report. At least one report control factor is determined as a function of channel quality information, power information, device capability information, and/or quality of service information. A transmission backlog report value is interpreted as a function of a reporting control factor. A wide range of quantization schemes for reporting transmission backlog information are facilitated corresponding to a small bit size report. A communications device can adaptively select a quantization request level closely matched to its current needs such as to provide an accurate representation of its current traffic channel resource needs.Type: ApplicationFiled: May 12, 2010Publication date: September 2, 2010Applicant: QUALCOMM IncorporatedInventors: Arnab Das, Sundeep Rangan, Pablo Anigstein, Murari Srinivasan
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Publication number: 20100211540Abstract: Techniques for efficiently sending reports in a wireless communication system are described. Reports may be sent repetitively in accordance with a reporting format. A terminal receives an assignment of a control channel used to send reports and determines a reporting format to use based on the assignment. The reporting format indicates a specific sequence of reports sent in specific locations of a control channel frame. The terminal generates a set of reports for each reporting interval and arranges the set of reports in accordance with the reporting format. The terminal repetitively sends a plurality of sets of reports in a plurality of reporting intervals. Reports may also be sent adaptively based on operating conditions. An appropriate reporting format may be selected based on the operating conditions of the terminal, which may be characterized by environment (e.g., mobility), capabilities, QoS, and/or other factors.Type: ApplicationFiled: July 14, 2006Publication date: August 19, 2010Inventors: Arnab Das, Sundeep Rangan, Pablo Anigstein, Junyi Li, Sathyadev Venkata Uppala, Rajiv Laroia
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Patent number: 7756548Abstract: 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: GrantFiled: September 19, 2005Date of Patent: July 13, 2010Assignee: QUALCOMM IncorporatedInventors: Rajiv Laroia, Pablo Anigstein, Arnab Das, Sundeep Rangan
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Patent number: 7734805Abstract: A method for scheduling transmissions to a plurality of users in a communication network determines a satisfaction metric and a dissatisfaction metric for each user in a given timeslot that is to be used for a next scheduled transmission to one of the users. Each user is assigned a weight based on a value of at least one of the user's satisfaction metric, the user's dissatisfaction metric and a rate requested by the user. The use having the highest weight is selected to be served the next scheduled transmission in the given timeslot.Type: GrantFiled: April 15, 2003Date of Patent: June 8, 2010Assignee: Alcatel-Lucent USA Inc.Inventors: Krishna Balachandran, Kenneth C. Budka, Arnab Das, Kameswara Rao Medapalli, Minothi Parulekar
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Patent number: 7577227Abstract: In one embodiment of the method of adaptively selecting an airlink coding scheme in a telecommunications network, a coding scheme operating region is determined based on a currently used coding scheme and measurements representative of a block error rate. A block error coding scheme is determined based on the determined coding scheme operating region. In another embodiment of the method of adaptively selecting an airlink coding scheme in a telecommunications network, a first coding scheme is determined based on measurements representative of one or more conditional channel quality metrics, and a second coding scheme is determined based on measurements representative of a block error rate. One of the first and second coding schemes is selected as the coding scheme.Type: GrantFiled: April 18, 2002Date of Patent: August 18, 2009Assignee: Alcatel-Lucent USA Inc.Inventors: Kenneth C. Budka, Arnab Das, Wei Luo
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Patent number: 7573942Abstract: A method for processing control information in a wireless communications system is described in which portions of the control information are separately encoded and decoded such that transmission format information for a corresponding data transmission can be determined with a reduced set of decoded control information. The control information is convolutionally coded using either a single set of tail bits or by judiciously dispersing the tail bits among different portions of the encoded signaling information.Type: GrantFiled: November 16, 2001Date of Patent: August 11, 2009Assignee: Alcatel-Lucent USA Inc.Inventors: Arnab Das, Farooq Ullah Khan, Ashwin Sampath, Hsuan-Jung Su
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Patent number: 7567791Abstract: Wireless terminal for use with a multi-mode base station that supports a transmit standby mode and an active mode is described. 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 from the wireless terminal, hand-off signals, etc.Type: GrantFiled: September 19, 2005Date of Patent: July 28, 2009Assignee: QUALCOMM IncorporatedInventors: Rajiv Laroia, Pablo Anigstein, Arnab Das, Sundeep Rangan
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Patent number: 7564827Abstract: An adaptive incremental redundancy (i.e., Hybrid ARQ) method is described for retransmitting information in a communication channel of a wireless communication system. More specifically, code multiplexing is used within fixed length frames in order to change the number of codes, modulation, and coding on retransmissions to provide the desired redundancy for successful decoding. The operation of adaptive Hybrid ARQ in the code domain also provides finer granularity in which to efficiently transmitting redundancy. In one illustrative embodiment, a method for retransmitting information in a communication channel having a plurality of fixed length frames each divided into a plurality of time slots of equal duration includes the step of code multiplexing a retransmission of a previous transmission within one of the fixed length frames using one or more of a plurality of codes. The number of codes used for the retransmission is variable based on the condition of the communication channel.Type: GrantFiled: October 19, 2001Date of Patent: July 21, 2009Assignee: Alcatel-Lucent USA Inc.Inventors: Arnab Das, Farooq Ullah Khan, Ashwin Sampath, Hsuan-Jung Su
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Publication number: 20090170437Abstract: Systems and methodologies are described that facilitate utilizing different power control algorithms as a function of access terminal speed. For instance, instantaneous Channel Quality Indicator (CQI) reports can be inverted for slow moving access terminals while long-term geometry inversion (e.g., average CQI report inversion) can be utilized for quick moving access terminals. Speed of the access terminal can be estimated based upon time correlation of CQI values. Further, selection of implementing instantaneous CQI inversion or long-term geometry inversion can be based upon the estimated speed of the access terminal.Type: ApplicationFiled: October 28, 2008Publication date: July 2, 2009Applicant: QUALCOMM IncorporatedInventors: Kapil Bhattad, Ravi Palanki, Alexei Gorokhov, Arnab Das
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Publication number: 20090131069Abstract: 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: ApplicationFiled: November 20, 2007Publication date: May 21, 2009Applicant: QUALCOMM INCORPORATEDInventors: Xinzhou Wu, Sundeep Rangan, Prashanth Hande, Arnab Das, Junyi Li
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Publication number: 20090129345Abstract: 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: ApplicationFiled: November 20, 2007Publication date: May 21, 2009Applicant: QUALCOMM INCORPORATEDInventors: Xinzhou Wu, Sundeep Rangan, Prashanth Hande, Arnab Das, Junyi Li
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Publication number: 20090129331Abstract: 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: ApplicationFiled: November 20, 2007Publication date: May 21, 2009Applicant: QUALCOMM IncorporatedInventors: Xinzhou Wu, Sundeep Rangan, Prashanth Hande, Arnab Das, Junyi Li
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Publication number: 20090131068Abstract: 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: ApplicationFiled: November 20, 2007Publication date: May 21, 2009Applicant: QUALCOMM IncorporatedInventors: Xinzhou Wu, Sundeep Rangan, Prashanth Hande, Arnab Das, Junyi Li
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Publication number: 20090122717Abstract: Systems and methodologies are described that facilitate enhanced resource scheduling for a wireless communication system. As described herein, packets associated with a common flow that arrive within a predetermined time period following a leading packet associated with the flow can be grouped into respective packet bursts. Subsequently, system bandwidth, transmit power, and/or other communication resources can be scheduled based on an analysis of the respective packet bursts. As provided herein, by analyzing respective packet bursts in lieu of individual packets, computational and resource overhead required for resource scheduling can be significantly reduced. In one example described herein, a resource schedule is determined by selecting one or more flows to be assigned bandwidth from among a plurality of flows based on an analysis of packet bursts respectively associated with the flows.Type: ApplicationFiled: November 3, 2008Publication date: May 14, 2009Applicant: QUALCOMM IncorporatedInventors: Arnab Das, Ritesh Madan, Sundeep Rangan, Sanjay Shakkottai, Siddharth Ray
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Publication number: 20090116439Abstract: 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: ApplicationFiled: October 30, 2008Publication date: May 7, 2009Applicant: QUALCOMM INCORPORATEDInventors: Ritesh K. Madan, Arnab Das, Sundeep Rangan, Siddharth Ray
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Publication number: 20090116390Abstract: Systems and methodologies are described that facilitate scheduling best effort flows in broadband or wideband wireless communication networks. The systems can include devices and/or component that effectuate associating utility functions to multiple disparate flows based on traffic conditions extant in the wireless system, ascertaining the average rate at which the flow has been serviced in the past, and utilizing the utility function associated with the flow or the average rate that the flow has been serviced in the past to optimally schedule the flow.Type: ApplicationFiled: October 30, 2008Publication date: May 7, 2009Applicant: QUALCOMM IncorporatedInventors: Ritesh K. Madan, Arnab Das, Sundeep Rangan, Siddharth Ray
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Publication number: 20090116438Abstract: Systems and methodologies are described that facilitate dividing scheduling algorithms into background and foreground aspects capable of simultaneously servicing a multiplicity of disparate flows in wideband communications networks. The systems provided herein arbitrarily select prospective time horizons, generate optimal bandwidth allocation targets based on a plurality of flows observed by the system, and utilizes the optimal bandwidth targets to assign flows to users over the entirety of the prospective time horizon.Type: ApplicationFiled: October 30, 2008Publication date: May 7, 2009Applicant: QUALCOMM INCOPORATEDInventors: Ritesh K. Madan, Arnab Das, Sundeep Rangan, Siddharth Ray
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Publication number: 20090082054Abstract: Systems and methodologies are described that facilitate and effectuate power allocation schemes that reuse power allocation patterns amongst different carriers for sectors in the same cell and uses different power allocation patterns between cells. The frequency reuse scheme generates power allocation patterns, selects one of the generated power allocation patterns for use among at least two carriers of at least two sectors in a cell, and employs a second disparate power allocation pattern for use between at two cells.Type: ApplicationFiled: September 26, 2007Publication date: March 26, 2009Applicant: QUALCOMM INCORPORATEDInventors: Junyi Li, Arnab Das, Xinzhou Wu