Patents by Inventor Chandra Sekhar Bontu

Chandra Sekhar Bontu 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: 9763110
    Abstract: A method and relay node for managing a plurality of relay nodes that is moving relative to a source network node, the method comprising: selecting a lead node; connecting the plurality of relay nodes to the lead node; and transmitting a signal to manage mobility of the plurality of relay nodes from the lead node to a network node.
    Type: Grant
    Filed: November 9, 2012
    Date of Patent: September 12, 2017
    Assignee: BlackBerry Limited
    Inventors: Yi Yu, Zhijun Cai, Yi Song, Yufei Wu Blankenship, Chandra Sekhar Bontu
  • Patent number: 9742516
    Abstract: A user equipment having a first mechanism to obtain a control region size of a sub-frame of a cell, the user equipment having a processor; and a communications subsystem, wherein the processor and communications subsystem are configured to cooperate to: determine having a first mechanism to obtain a control region size of a sub-frame of the first cell, second cell, or both, whether the user equipment is within an area of the second cell; and utilize, a second mechanism to obtain a control region size of a sub-frame of the second cell while the user equipment is within the area of the second cell.
    Type: Grant
    Filed: July 28, 2011
    Date of Patent: August 22, 2017
    Assignee: BlackBerry Limited
    Inventors: Yi Song, Chandra Sekhar Bontu, Youn Hyoung Heo, Yufei Wu Blankenship, Yi Yu, Zhijun Cai
  • Patent number: 9717112
    Abstract: A method at a UE operating in a hybrid network, the method receiving a separate discontinuous reception configuration at the UE for the macro cell than for a small cell; and configuring a receiver on the UE according to the separate discontinuous reception configurations. Further, a method at a macro cell, the method determining a mobility state of a UE; finding a service at the UE; and limiting the UE to associate only with the macro cell based on at least one of the determining and the finding. Further, a method at a UE in an environment with a macro and small cell using the same frequency, including receiving a first allocation for small cell within a common small HARQ subframe set; and receiving a second allocation for a macro cell within a common macro HARQ subframe set, wherein the sets do not overlap.
    Type: Grant
    Filed: March 11, 2013
    Date of Patent: July 25, 2017
    Assignee: BlackBerry Limited
    Inventors: Zhijun Cai, Chandra Sekhar Bontu, Yi Song
  • Patent number: 9699740
    Abstract: A method for communication in a wireless network is provided. The method includes a relay node receiving a data packet and determining whether to transmit the packet without performing error checking.
    Type: Grant
    Filed: August 24, 2016
    Date of Patent: July 4, 2017
    Assignee: BlackBerry Limited
    Inventors: Chandra Sekhar Bontu, Yongkang Jia, Amin Mobasher
  • Patent number: 9681441
    Abstract: Systems and methods for coexistence of Multimedia Broadcast Multicast Services (MBMS) and Voice over Internet Protocol (VoIP) services are disclosed. In one embodiment, a method of operation of a network node in a cellular communications network is provided. The method includes determining a number of MBMS subframes for an MBMS allocation period. The method also includes, for each MBMS subframe of the number of MBMS subframes, assigning a frame number and a subframe number for the MBMS subframe such that a probability of a VoIP packet transmission during the MBMS subframe is mitigated. By mitigating the probability that a VoIP packet transmission occurs during a scheduled MBMS subframe, a VoIP user equipment (UE) may miss fewer packets and/or experience reduced battery drain.
    Type: Grant
    Filed: August 22, 2014
    Date of Patent: June 13, 2017
    Assignee: Telefonaktiebolaget L M Ericsson (publ)
    Inventors: Chandra Sekhar Bontu, Prabaharan Kanesalingam
  • Publication number: 20170141885
    Abstract: A method for using a high order modulation (HoM) mode for communications with a wireless device in a wireless communication network is provided. The method includes receiving downlink channel quality indicator (CQI) information from an uplink transmission of the wireless device and determining a downlink channel quality estimate from the CQI information. When a measurement of the downlink channel quality estimate satisfies the predetermined criteria for a first predetermined number of consecutive uplink transmissions from the wireless device, a downlink transmission mode of the wireless device is switched from a first modulation mode to the HoM mode.
    Type: Application
    Filed: June 25, 2015
    Publication date: May 18, 2017
    Applicant: Telefonaktiebolaget LM Erisson (Publ)
    Inventors: Chandra Sekhar BONTU, Xixian CHEN, Kevin LUO, Hong REN, Hua XU
  • Publication number: 20170142775
    Abstract: A node and method for extending a wake up time of a wireless user equipment (UE) are provided. The node includes a memory. The memory is configured to store data to be transmitted to the UE. The node includes a processor configured to determine if the memory is storing data to be transmitted to the UE, determine if the wake up time of the UE coincides with a periodic subframe, the periodic subframe occurring with a periodicity and cause transmission of a message for a grant to the UE if the determination is made that the memory is storing data to be transmitted to the UE and the wake up time of the UE coincides with the periodic subframe.
    Type: Application
    Filed: July 18, 2014
    Publication date: May 18, 2017
    Inventors: Prabaharan KANESALINGAM, Chandra Sekhar BONTU, Alexander LANGEREIS, Patrick LIE CHIN CHEONG
  • Patent number: 9654953
    Abstract: A method at a mobile device, including receiving, at the mobile device, an emergency alert message from a base station; determining a response is required for the emergency alert message; and sending the response to the base station.
    Type: Grant
    Filed: November 27, 2013
    Date of Patent: May 16, 2017
    Assignee: BlackBerry Limited
    Inventors: Chandra Sekhar Bontu, Shalini Suresh Periyalwar, James Earl Womack, Zhijun Cai
  • Publication number: 20170135000
    Abstract: A user equipment (UE) receives, from a wireless access network node of a source cell, a Radio Resource Control (RRC) message identifying a subframe containing information relating to an uplink grant to be sent by a target cell. The UE detects the uplink grant in the identified subframe transmitted by a target wireless access network node of the target cell. The UE sends, in response to the UE successfully accessing the target cell or detecting the information relating to the uplink grant, an RRC message to the target cell to handover from the source cell to the target cell.
    Type: Application
    Filed: January 23, 2017
    Publication date: May 11, 2017
    Inventors: Zhijun Cai, Chandra Sekhar Bontu, Yi Song
  • Patent number: 9642121
    Abstract: A method is provided for communication in a wireless telecommunication network. The method comprises providing, by a network element, one of an uplink grant or a downlink grant to at least one UE that the network element has determined, based on information received from a plurality of UEs, is closer to the network element than is another UE, wherein the uplink grant is scheduled such that the UE transmits to the network element only during at least one flexible subframe, and wherein the downlink grant is scheduled such that the network element transmits to the UE only during at least one flexible subframe. The method further comprises transmitting, by the network element, to at least one UE that the network element has determined, based on information received from a plurality of UEs, is closer to the network element than is another UE, only during at least one flexible subframe.
    Type: Grant
    Filed: October 5, 2015
    Date of Patent: May 2, 2017
    Assignee: BlackBerry Limited
    Inventors: Yi Song, Chandra Sekhar Bontu, Zhijun Cai
  • Publication number: 20170111928
    Abstract: A network element in a first cell in a wireless telecommunication network is provided. The network element comprises a processor configured such that the network element provides uplink and downlink grants in the first cell, wherein the first cell is a low-power cell within the coverage area of a second, high-power cell, and wherein the first cell acts as a secondary cell and the second cell acts as a primary cell in a carrier aggregation mode, and wherein at least one uplink control signal is received by one of only the first cell or both the first cell and the second cell.
    Type: Application
    Filed: December 12, 2016
    Publication date: April 20, 2017
    Inventors: Yi Song, Chandra Sekhar Bontu, Zhijun Cai
  • Patent number: 9628229
    Abstract: A method and system for determining whether to apply an inter-cell coordination procedure for a UE in the presence of inter-cell interference from cells, the cells including a serving cell and a plurality of interfering cells, are disclosed. According to one aspect, a method includes receiving measurements of uplink signal quality of the UE from the cells. The method also includes calculating a combined metric based on the received uplink signal quality measurements. The combined metric is compared to a serving cell threshold to determine whether to implement the inter-cell coordination procedure.
    Type: Grant
    Filed: December 4, 2014
    Date of Patent: April 18, 2017
    Assignee: TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)
    Inventors: Chandra Sekhar Bontu, Prabaharan Kanesalingam, Mercy George
  • Patent number: 9622138
    Abstract: A method and system for formulating an SINR metric for cells using only the existing RSRP and RSRQ measurements. With this method and system side information is exchanged between eNBs of an E-UTRAN using the X2 interface where the X2 interface carries the X2 Application Protocol (X2AP). The side information is introduced either within X2AP messages exchanged between eNB nodes or via modification of existing X2AP messages. Serving cell system information block (SIB) messages may also be modified or new SIB messages introduced to facilitate computation of an SNIR metric at a UE.
    Type: Grant
    Filed: May 31, 2011
    Date of Patent: April 11, 2017
    Assignee: BlackBerry Limited
    Inventors: Chandra Sekhar Bontu, Zhijun Cai, Yi Yu, Yi Song, Rose Qingyang Hu
  • Publication number: 20170094625
    Abstract: Described herein is a system with a first network element and a second network element. The first network element contains a processor configured to synchronize with the second network element; and maintain synchronization with the second network element. The first network element is a small cell eNB and the second network element is one of the following: a macro cell enhanced node-B (eNB); or a small cell eNB.
    Type: Application
    Filed: December 12, 2016
    Publication date: March 30, 2017
    Inventors: Hua Xu, Shiwei Gao, Zhijun Cai, Chandra Sekhar Bontu, Yi Song, Yajun Zhu
  • Patent number: 9591679
    Abstract: Systems, methods, and apparatuses for initiation of inter-device communication in wireless communication systems are provided. Both a user equipment (UE) and a network entity may initiate a direct inter-device communication link between UEs located in proximity. The UE may simultaneously maintain an active communication link with its serving base station while communicating with other UEs over the inter-device communication link. Long term evolution (LTE) downlink or uplink radio resources may be used for communications over the inter-device communication link.
    Type: Grant
    Filed: September 17, 2012
    Date of Patent: March 7, 2017
    Assignee: BlackBerry Limited
    Inventors: Chandra Sekhar Bontu, Yu Song, Zhijun Cai
  • Patent number: 9572115
    Abstract: A method and device for determining whether to send a measurement report to a serving cell and determining when an inter-cell coordination procedure is likely to achieve coordination gain are disclosed. According to one aspect, a method includes performing received signal quality measurements of the serving cell and a plurality of neighboring cells. The method also includes calculating a UE metric based on the received signal quality measurements of a plurality of interfering cells and based on a scaling parameter. The method further includes comparing the calculated UE metric to a threshold to determine whether to send the measurement report to the serving cell.
    Type: Grant
    Filed: December 4, 2014
    Date of Patent: February 14, 2017
    Assignee: Telefonaktiebolaget LM Ericsson (publ)
    Inventors: Chandra Sekhar Bontu, Prabaharan Kanesalingam, Mercy George
  • Patent number: 9554397
    Abstract: A user equipment (UE) receives a message identifying a subframe containing information relating to an uplink grant to be sent by a target cell.
    Type: Grant
    Filed: May 5, 2014
    Date of Patent: January 24, 2017
    Assignee: BlackBerry Limited
    Inventors: Zhijun Cai, Chandra Sekhar Bontu, Yi Song
  • Patent number: 9544880
    Abstract: A network element in a first cell in a wireless telecommunication network is provided. The network element comprises a processor configured such that the network element provides uplink and downlink grants in the first cell, wherein the first cell is a low-power cell within the coverage area of a second, high-power cell, and wherein the first cell acts as a secondary cell and the second cell acts as a primary cell in a carrier aggregation mode, and wherein at least one uplink control signal is received by one of only the first cell or both the first cell and the second cell.
    Type: Grant
    Filed: March 15, 2013
    Date of Patent: January 10, 2017
    Assignee: BlackBerry Limited
    Inventors: Yi Song, Chandra Sekhar Bontu, Zhijun Cai
  • Patent number: 9532281
    Abstract: Systems, methods, and apparatuses for data and/or control offloading and handover in heterogeneous wireless communication networks are provided. Data and/or control packets can be offloaded to a coordinating base station while a user equipment (UE) remains associated with its serving cell. The packets are still transferred between the serving base station and the core network, and the offloaded data and/or control packets are forwarded from the serving base station to the coordinating base station for transmission to the UE. Furthermore, during a handover process, the serving base station and coordinating base station may independently schedule and send a handover command to the UE to reduce the radio link failure rate.
    Type: Grant
    Filed: August 3, 2015
    Date of Patent: December 27, 2016
    Assignee: BlackBerry Limited
    Inventors: Chandra Sekhar Bontu, Zhijun Cai, Yi Song
  • Publication number: 20160373980
    Abstract: A method and relay node for managing a relay node that is moving relative to a source network node, the method receiving parameters of a target network node from a source network node at the relay node; initiating a direct attachment of the relay node to the target network node; and detaching the relay node from the source network node. Also, a method and network node for managing a relay node that is moving relative to a source network node, the method sending a handover request of a relay node from the source network node to a target network node; performing handover of a plurality of user equipments (UEs) from the source network node to the target network node, wherein the plurality of UEs are attached to the relay node, and establishing an interface between the relay node and the target network node.
    Type: Application
    Filed: August 30, 2016
    Publication date: December 22, 2016
    Inventors: Yi Yu, Zhijun Cai, Yi Song, Yufei Wu Blankenship, Chandra Sekhar Bontu