公开(公告)号：US10574535B2

公开(公告)日：2020-02-25

申请号：US16043665

申请日：2018-07-24

Applicant: NEC Laboratories America, Inc.

Inventor： Mohammad Khojastepour ,  Karthikeyan Sundaresan ,  Eugene Chai ,  Sampath Rangarajan

IPC: H04L12/24 ,  H04W24/08 ,  H04W24/02

Abstract: A method implemented in wireless communication systems for finding a topology of a network of communication nodes is presented. The method includes defining a set of the communication nodes as measurement nodes that identify if a channel is available or occupied at a particular time, determining, via a central controller that has access to measurements of at least one measurement node of the measurement nodes, a probability of availability or occupancy of the channel for the at least one measurement node and determining a joint probability of availability or occupancy of the channel for multiple measurement nodes for which a measurement is available, and computing, via a central decision device, the network topology from the determined probabilities.

公开(公告)号：US10469188B2

公开(公告)日：2019-11-05

申请号：US16039733

申请日：2018-07-19

Applicant: NEC Laboratories America, Inc.

Inventor： Karthikeyan Sundaresan ,  Eugene Chai ,  Ramanujan Sheshadri ,  Mohammad Khojastepour ,  Sampath Rangarajan

IPC: H04L12/26 ,  H04B17/345 ,  H04W24/10 ,  H04W72/08 ,  H04J11/00 ,  H04W74/08 ,  H04W16/14 ,  H04W84/04 ,  H04W72/12

Abstract: A computer-implemented method executed on a processor for employing an epoch-based approach to estimating interference in an unlicensed spectrum is presented. The method includes enabling communication between a long-term evolution (LTE) evolved node B (eNodeB) and a plurality of clients, detecting and measuring the interference in all existing non-overlapping channels, via the LTE eNodeB, caused by one or more hidden clients of the plurality of clients, collecting interference statistics from all of the plurality of clients across all different channels, and leveraging interference-awareness resulting in channel access performance improvement at a macro-time scale and a micro-time scale.

公开(公告)号：US10405373B2

公开(公告)日：2019-09-03

申请号：US16037473

申请日：2018-07-17

Applicant: NEC Laboratories America, Inc.

Inventor： Eugene Chai ,  Mohammad Khojastepour ,  Karthikeyan Sundaresan ,  Sampath Rangarajan ,  Mehrdad Moradi

IPC: H04M3/00 ,  H04W84/18 ,  B64C39/02 ,  H04B7/185 ,  H04W24/02 ,  H04W64/00 ,  H04W72/08 ,  H04W84/22 ,  H04W92/02 ,  H04W36/08 ,  H04W84/06

Abstract: A system for implementing a distributed core architecture of a wireless communication network is provided. The system includes a plurality of devices configured to communicate with one or more UE devices to implement the wireless communication network. A given one of the plurality of devices includes at least one processor operatively coupled to a memory and a core agent implemented by the at least one processor. The core agent includes a controller for controlling functionality of the device, a switch operatively coupled to the controller, a precomputed policy data store for storing precomputed policies associated with at least security and service, mobility and policy applications, and a set of core applications including an inter-agent communication application for communicating with other core agents associated with other devices of the wireless communication network, and a control application for controlling the device.

公开(公告)号：US20190045580A1

公开(公告)日：2019-02-07

申请号：US16037473

申请日：2018-07-17

Applicant: NEC Laboratories America, Inc.

Inventor： Eugene Chai ,  Mohammad Khojastepour ,  Karthikeyan Sundaresan ,  Sampath Rangarajan ,  Mehrdad Moradi

IPC: H04W84/18 ,  H04B7/185 ,  B64C39/02

CPC classification number: H04W84/18 ,  B64C39/024 ,  B64C2201/122 ,  H04B7/18504 ,  H04B7/18506 ,  H04W24/02 ,  H04W36/08 ,  H04W64/003 ,  H04W72/082 ,  H04W84/06 ,  H04W84/22 ,  H04W92/02

Abstract: A system for implementing a distributed core architecture of a wireless communication network is provided. The system includes a plurality of devices configured to communicate with one or more UE devices to implement the wireless communication network. A given one of the plurality of devices includes at least one processor operatively coupled to a memory and a core agent implemented by the at least one processor. The core agent includes a controller for controlling functionality of the device, a switch operatively coupled to the controller, a precomputed policy data store for storing precomputed policies associated with at least security and service, mobility and policy applications, and a set of core applications including an inter-agent communication application for communicating with other core agents associated with other devices of the wireless communication network, and a control application for controlling the device.

公开(公告)号：US20190036786A1

公开(公告)日：2019-01-31

申请号：US16043665

申请日：2018-07-24

Applicant: NEC Laboratories America, Inc.

Inventor： Mohammad Khojastepour ,  Karthikeyan Sundaresan ,  Eugene Chai ,  Sampath Rangarajan

IPC: H04L12/24 ,  H04W24/08

CPC classification number: H04L41/12 ,  H04L41/142 ,  H04W24/02 ,  H04W24/08

Abstract: A method implemented in wireless communication systems for finding a topology of a network of communication nodes is presented. The method includes defining a set of the communication nodes as measurement nodes that identify if a channel is available or occupied at a particular time, determining, via a central controller that has access to measurements of at least one measurement node of the measurement nodes, a probability of availability or occupancy of the channel for the at least one measurement node and determining a joint probability of availability or occupancy of the channel for multiple measurement nodes for which a measurement is available, and computing, via a central decision device, the network topology from the determined probabilities.

公开(公告)号：US20190036629A1

公开(公告)日：2019-01-31

申请号：US16039733

申请日：2018-07-19

Applicant: NEC Laboratories America, Inc.

Inventor： Karthikeyan Sundaresan ,  Eugene Chai ,  Ramanujan Sheshadri ,  Mohammad Khojastepour ,  Sampath Rangarajan

IPC: H04B17/345 ,  H04W24/10 ,  H04W72/08 ,  H04W74/08 ,  H04J11/00

CPC classification number: H04B17/345 ,  H04J11/0026 ,  H04J2211/005 ,  H04W16/14 ,  H04W24/10 ,  H04W72/082 ,  H04W72/1226 ,  H04W74/0816 ,  H04W84/045

Abstract: A computer-implemented method executed on a processor for employing an epoch-based approach to estimating interference in an unlicensed spectrum is presented. The method includes enabling communication between a long-term evolution (LTE) evolved node B (eNodeB) and a plurality of clients, detecting and measuring the interference in all existing non-overlapping channels, via the LTE eNodeB, caused by one or more hidden clients of the plurality of clients, collecting interference statistics from all of the plurality of clients across all different channels, and leveraging interference-awareness resulting in channel access performance improvement at a macro-time scale and a micro-time scale.

公开(公告)号：US10110293B2

公开(公告)日：2018-10-23

申请号：US14742039

申请日：2015-06-17

Applicant: NEC Laboratories America, Inc.

Inventor： Mohammad Khojastepour ,  Karthikeyan Sundaresan

IPC: H04L5/14 ,  H04B7/06 ,  H04L5/00

Abstract: Systems and methods for full-duplex communication in a communications network, including generating a combined channel matrix including two or more channel matrices and determining a null space and a basis for the combined channel matrix. Common, individual, and disjoint vector spaces are determined, and common vector space is determined for each of one or more receiving nodes and each or one or more transmitting nodes, disjoint vector spaces for each of the one or more nodes are determined based on the common vector space for each of the one or more nodes, and individual vector spaces are determined based on the common and the disjoint vector spaces. Signals are mapped at each of the nodes to determine corresponding vector spaces; and interference alignment is performed in common vector spaces and zero forcing in disjoint vector spaces using a hardware processor.

公开(公告)号：US20170265104A1

公开(公告)日：2017-09-14

申请号：US15385173

申请日：2016-12-20

Applicant: NEC Laboratories America, Inc.

Inventor： Mustafa Arslan ,  Karthikeyan Sundaresan ,  Ramanujan Sheshadri

IPC: H04W28/16 ,  H04W24/02

CPC classification number: H04W28/16 ,  H04W16/04 ,  H04W16/10 ,  H04W24/02 ,  H04W84/12 ,  H04W88/085

Abstract: A computer-implemented method for dynamic provisioning of Wi-Fi capacity in areas using a centralized radio access network (C-RAN) architecture is presented. The computer-implemented method includes introducing a set of access points (APs) in a network for providing capacity required to serve a plurality of users accessing heterogeneous content, introducing a set of remote radio heads (RRHs) in the network acting as transmit/receive points, tracking traffic fluctuations, and adapting front-haul configurations at a granularity of epochs, where measurements from previous epochs serve as input to drive current epochs.

公开(公告)号：US09735945B2

公开(公告)日：2017-08-15

申请号：US14340263

申请日：2014-07-24

Applicant: NEC Laboratories America, Inc.

Inventor： Karthikeyan Sundaresan

IPC: H04L5/00 ,  H04W16/10

CPC classification number: H04L5/0073 ,  H04W16/10

Abstract: At the beginning of every epoch the invention estimates the average traffic demand from cellular and device-to-device traffic in each sector in either DL or UL directions based on history from previous epochs. It partitions the network into interfering sectors and employing device-to-device traffic to determine the dynamic fractional frequency reuse FFR patterns for each of these clusters. Then, in every frame, for the set of sectors co-located at the same base station and instantaneous traffic demands, the invention solves the problem of device-to-device traffic placement and scheduling of cellular and device-to-device traffic jointly.

公开(公告)号：US20170126798A1

公开(公告)日：2017-05-04

申请号：US15340768

申请日：2016-11-01

Applicant: NEC Laboratories America, Inc.

Inventor： Mohammad Khojastepour ,  Rajesh Mahindra ,  Karthikeyan Sundaresan ,  Sampath Rangarajan

IPC: H04L29/08

CPC classification number: H04L67/1027 ,  G06F9/00 ,  H04L67/1008 ,  H04L67/1019

Abstract: A load balancing device and method are provided. The load balancing device includes a processor. The processor is configured to receive a plurality of tasks from a plurality of user devices, each of the plurality of tasks involving a respective one of multiple sets of sessions. The processor is further configured to generate a task ID for each of the plurality tasks using a randomization function, at least one task ID for at least one of the plurality of tasks changing over time responsive to one or more criterion. The processor is additionally configured to allocate the plurality of tasks amongst a set of worker entities such that all the sessions involved in the plurality of tasks received from a respective same one of the plurality of user devices is assigned to a same one of the worker entities in the set.