公开(公告)号：US11546114B2

公开(公告)日：2023-01-03

申请号：US16868661

申请日：2020-05-07

申请人： Keyvan Zarifi ,  Javad Abdoli

发明人： Keyvan Zarifi ,  Javad Abdoli

IPC分类号： H04L5/00 ,  H04W72/04 ,  H04L43/08

摘要： Aspects of the present application provide methods and devices in a communication network that aid in implementing sounding reference signal (SRS) measurement by multiple cells (i.e. serving cells and non-serving cells, also known as “neighbor cells”) as well as NR LMUs.

公开(公告)号：US11889548B2

公开(公告)日：2024-01-30

申请号：US17504200

申请日：2021-10-18

申请人： Mohamed Adel Salem ,  Keyvan Zarifi

发明人： Mohamed Adel Salem ,  Keyvan Zarifi

IPC分类号： H04W74/02 ,  H04W74/00 ,  H04L5/00 ,  H04W16/14

CPC分类号： H04W74/02 ,  H04L5/0051 ,  H04W16/14 ,  H04W74/006

摘要： Some embodiments of the present disclosure provide for configuring channel access mechanisms in a mmWave shared spectrum mobile communication network. The channel access mechanisms are to be used by a user equipment (UE) and a serving node in the UE's serving cell. The configuring may use a single, cell-specific higher layer parameter or a combination of two cell-specific higher layer parameters. The parameters may configure the UE and the node to perform channel sensing before transmitting to initiate a channel occupancy. Alternatively, the UE and the node may be configured to transmit directly without channel sensing. The parameters may configure a receiver (the UE or the node) to perform channel sensing before transmitting a channel idle indication to the transmitter as part of a channel access procedure to initiate a channel occupancy. Alternatively, the parameters may configure the UE and the node to receive without channel sensing.

公开(公告)号：US10834700B2

公开(公告)日：2020-11-10

申请号：US16505029

申请日：2019-07-08

申请人： Keyvan Zarifi ,  Mohammadhadi Baligh

发明人： Keyvan Zarifi ,  Mohammadhadi Baligh

IPC分类号： H04W68/02 ,  H04W76/11

摘要： Methods, apparatuses and systems are described. A device, in the active state, receives, from a serving transmission point, a device connection identifier (DCID) associated with the device. The device, in the standby state, periodically transmits, to the same or different serving transmission point, an identifying signal that identifies the first device using the DCID, to synchronize the first device with a wireless communications network.

公开(公告)号：US10652851B2

公开(公告)日：2020-05-12

申请号：US15789650

申请日：2017-10-20

申请人： Usa Vilaipornsawai ,  Mohammadhadi Baligh ,  Keyvan Zarifi ,  Yicheng Lin

发明人： Usa Vilaipornsawai ,  Mohammadhadi Baligh ,  Keyvan Zarifi ,  Yicheng Lin

IPC分类号： H04W64/00 ,  H04W52/02 ,  H04W76/27

摘要： Methods and devices for uplink-based User Equipment (UE) tracking for UEs operating in a connected inactive operating state are provided. A transmit-receive point (TRP) transmits parameters to a UE that allow the UE to uniquely determine a UE-specific tracking sequence and assigned time-frequency (TF) resource that are independent of a TRP identifier associated with the TRP. The UE determines the UE-specific tracking sequence and assigned TF resource based at least in part on the parameters received from the TRP. While in the connected inactive operating state, the UE transmits a tracking signal that includes the UE-specific tracking sequence in accordance with the assigned TF resource. The TRP receives the tracking signal from the UE, detects the UE in accordance with the UE-specific tracking sequence to produce a UE detection status, and transmits a tracking response to the UE in accordance with the UE detection status.

公开(公告)号：US10530622B2

公开(公告)日：2020-01-07

申请号：US15801177

申请日：2017-11-01

申请人： Keyvan Zarifi ,  Mohammadhadi Baligh ,  Usa Vilaipornsawai

发明人： Keyvan Zarifi ,  Mohammadhadi Baligh ,  Usa Vilaipornsawai

IPC分类号： H04W4/00 ,  H04L27/26 ,  H04J13/00 ,  H04L5/00 ,  H04W72/04

摘要： Methods and devices for configurable sequence usage for user equipment (UE) uplink reference signaling are provided. In one provided method, a transmission reception point (TRP) in a wireless communication network receives a first UL reference signal (RS) associated with a first UL RS sequence from a first UE and receives a second UL RS associated with a second UL RS sequence from a second UE, the first and second UL RS sequences being non-orthogonal. In another provided method, A UE determines an UL RS sequence based on a UL RS sequence root, the UL RS sequence root being a UE-specific root and being independent of a cell identifier of a cell serving the UE. The UE sends an UL RS associated with the UL RS sequence, the UL RS sequence being a Zadoff-Chu sequence.

公开(公告)号：US10448285B2

公开(公告)日：2019-10-15

申请号：US15073788

申请日：2016-03-18

申请人： Mohammadhadi Baligh ,  Jianglei Ma ,  Alireza Bayesteh ,  Usa Vilaipornsawai ,  Yicheng Lin ,  Keyvan Zarifi

发明人： Mohammadhadi Baligh ,  Jianglei Ma ,  Alireza Bayesteh ,  Usa Vilaipornsawai ,  Yicheng Lin ,  Keyvan Zarifi

IPC分类号： H04L5/00 ,  H04W36/00

摘要： User Equipment (UE) mobility in Ultra Dense Networks (UDNs) is based on communication signal layers, which could include respective data streams in an Orthogonal Frequency Division Multiplexing (OFDM) domain, a code domain using respective codebooks, and/or a spatial domain, for example. A UE uses candidate layer decoding parameters in applying layer-based decoding to communication signals that it received from network nodes. Layers could be allocated to UEs and transition between network nodes as UEs move between different network service areas. Layers could instead be allocated to network nodes. Layer-based decoding provides for UE mobility without requiring explicit handover processing every time a UE moves between different service areas.

公开(公告)号：US11178580B2

公开(公告)日：2021-11-16

申请号：US16557089

申请日：2019-08-30

申请人： Mohammadhadi Baligh ,  Jianglei Ma ,  Alireza Bayesteh ,  Usa Vilaipornsawai ,  Yicheng Lin ,  Keyvan Zarifi

发明人： Mohammadhadi Baligh ,  Jianglei Ma ,  Alireza Bayesteh ,  Usa Vilaipornsawai ,  Yicheng Lin ,  Keyvan Zarifi

IPC分类号： H04W36/00 ,  H04L5/00 ,  H04B7/0417

摘要： User Equipment (UE) mobility in Ultra Dense Networks (UDNs) is based on communication signal layers, which could include respective data streams in an Orthogonal Frequency Division Multiplexing (OFDM) domain, a code domain using respective codebooks, and/or a spatial domain, for example. A UE uses candidate layer decoding parameters in applying layer-based decoding to communication signals that it received from network nodes. Layers could be allocated to UEs and transition between network nodes as UEs move between different network service areas. Layers could instead be allocated to network nodes. Layer-based decoding provides for UE mobility without requiring explicit handover processing every time a UE moves between different service areas.

公开(公告)号：US10651998B2

公开(公告)日：2020-05-12

申请号：US16054707

申请日：2018-08-03

申请人： Aman Jassal ,  Keyvan Zarifi

发明人： Aman Jassal ,  Keyvan Zarifi

IPC分类号： H04W56/00 ,  H04L5/00

摘要： Networks use channel state information reference signals (CSI-RSs) to measure channel conditions between a user equipment (UE) and a transmit/receive point (TRP) in a cell. The resources configured for the transmission of a CSI-RS may be indicated to the UE using higher layer signaling. Measurement results for a CSI-RS are transmitted by the UE in the form of a measurement report. A need exists for signaling designs that aim to provide more flexible and efficient signaling of CSI-RS resource configurations and measurement reports. In some embodiments, CSI-RS resource configurations and measurement reports are resource-specific. The CSI-RS resource configurations may be independent from an identifier of the cell that the CSI-RS is transmitted from, and the measurement reports do not necessarily include the identifier of the cell. Advantages may include allowing the network to freely allocate CSI-RS resources without the need for reconfiguration at the UE side.

公开(公告)号：US09674801B2

公开(公告)日：2017-06-06

申请号：US13558713

申请日：2012-07-26

申请人： Hamidreza Farmanbar ,  Mohammadhadi Baligh ,  Keyvan Zarifi

发明人： Hamidreza Farmanbar ,  Mohammadhadi Baligh ,  Keyvan Zarifi

IPC分类号： H04W52/42 ,  H04L5/00 ,  H04B7/024 ,  H04B7/0426 ,  H04B7/0452 ,  H04B7/06 ,  H04W52/34 ,  H04W52/36

CPC分类号： H04W52/42 ,  H04B7/024 ,  H04B7/0426 ,  H04B7/0452 ,  H04B7/0626 ,  H04L5/0035 ,  H04W52/346 ,  H04W52/367

摘要： A system is provided for allocating downlink transmit power in a wireless multiple-input multiple-output (MIMO) system. During operation, the system identifies a set of receivers for receiving signals from one or more transmitters on a same time-frequency slot, receives channel state information (CSI) for communication channels between the identified receivers and the transmitters, and constructs a precoder based on the CSI. The system further derives a set of power-scale factors for the precoder based on a utility function associated with the identified receivers such that the power-scale factors optimize the utility function. A respective power-scale factor scales power transmitted to a corresponding receiver.

公开(公告)号：US09635598B2

公开(公告)日：2017-04-25

申请号：US14609644

申请日：2015-01-30

申请人： Mohammadhadi Baligh ,  Keyvan Zarifi ,  Jianglei Ma

发明人： Mohammadhadi Baligh ,  Keyvan Zarifi ,  Jianglei Ma

IPC分类号： H04W76/02 ,  H04W40/02 ,  H04W40/20 ,  H04W40/22 ,  H04W28/02

摘要： A master user equipment (UE) device may coordinate device-to-device (D2D) communications amongst a plurality of UE devices. For example, a UE device, which has been designated as a master UE device, may coordinate a D2D communication between a first UE device and a second UE device. The master UE device may be a UE device that obtains an indication that it is a master UE device that is to coordinate D2D communications amongst the plurality of UE devices. In some embodiments, the coordinating the D2D communication may be on behalf of a network and/or to facilitate wireless communication between the network and at least one of the plurality of UE devices.