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公开(公告)号：US11076357B2
公开(公告)日：2021-07-27
申请号：US16092209
申请日：2017-04-07
发明人： Amitav Mukherjee , Havish Koorapaty
IPC分类号： H04W52/14 , H04W52/22 , H04W16/14 , H04W52/32 , H04W52/36 , H04W52/42 , H04W72/14 , H04W74/08
摘要： Systems and methods relating to transmit power control are disclosed. In some embodiments, a method of operation of a radio access node for providing transmit power control commands to a wireless device for uplink (UL) transmission on a cell that operates in an unlicensed frequency spectrum is provided. The method comprises indicating, for the cell that operates in the unlicensed frequency spectrum, a dynamic Transmit Power Control (TPC) command using a downlink (DL) control channel which indicates a DL-UL allocation of upcoming subframes in the cell that operates in the unlicensed frequency spectrum. In some embodiments, the DL control channel is a common DL control channel. In some other embodiments, the DL channel is a common Physical Downlink Control Channel (PDCCH).
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公开(公告)号：US11140713B2
公开(公告)日：2021-10-05
申请号：US14962503
申请日：2015-12-08
发明人： Amitav Mukherjee , Jung-Fu Cheng , Sorour Falahati , Havish Koorapaty , Daniel Larsson , Yu Yang
摘要： Systems and methods are described herein relating to preemptive retransmission of a transport block in successive subframes on, e.g., a Listen-Before-Talk (LBT) cell. Embodiments of a method of operation of a radio node of a cellular communications network are disclosed. The radio node serves an LBT cell. In some embodiments, the method of operation of the radio node comprises transmitting a transport block in a first subframe on the LBT cell and retransmitting the transport block in a second subframe (e.g., on the LBT cell), where the second subframe is adjacent, in time, to the first subframe. In embodiments in which the retransmission of the transport block is on the LBT cell (or another LBT cell), the time span of a transmission burst can be extended to a maximum allowed burst duration.
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公开(公告)号：US20190246427A1
公开(公告)日：2019-08-08
申请号：US16319002
申请日：2017-07-20
发明人： Amitav Mukherjee
CPC分类号： H04W74/0808 , H04L5/001 , H04L5/005 , H04L5/0051 , H04L25/0226 , H04L27/2607 , H04W16/14 , H04W72/0453 , H04W72/14
摘要： Systems and methods related to switched carrier Sounding Reference Signal (SRS) transmission in unlicensed spectrum are disclosed. In some embodiments, a method of operation of a User Equipment device (UE) in a wireless system comprises performing uplink Listen-Before-Talk (LBT) on one or more candidate carriers for switched carrier SRS transmission and performing a switched carrier SRS transmission on at least one candidate carrier of the one or more candidate carriers that is determined to be available as a result of performing the uplink LBT on the one or more candidate carriers. In some embodiments, the one or more candidate carriers are carriers other than carriers configured for the UE and on which the UE is scheduled to transmit.
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公开(公告)号：US20220272637A1
公开(公告)日：2022-08-25
申请号：US17443621
申请日：2021-07-27
发明人： Amitav Mukherjee , Havish Koorapaty
IPC分类号： H04W52/14 , H04W16/14 , H04W52/22 , H04W52/32 , H04W52/36 , H04W52/42 , H04W72/14 , H04W74/08
摘要： Systems and methods relating to transmit power control are disclosed. In some embodiments, a method of operation of a radio access node for providing transmit power control commands to a wireless device for uplink (UL) transmission on a cell that operates in an unlicensed frequency spectrum is provided. The method comprises indicating, for the cell that operates in the unlicensed frequency spectrum, a dynamic Transmit Power Control (TPC) command using a downlink (DL) control channel which indicates a DL-UL allocation of upcoming subframes in the cell that operates in the unlicensed frequency spectrum. In some embodiments, the DL control channel is a common DL control channel. In some other embodiments, the DL channel is a common Physical Downlink Control Channel (PDCCH).
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公开(公告)号：US11252709B2
公开(公告)日：2022-02-15
申请号：US16330046
申请日：2017-08-31
发明人： Amitav Mukherjee , Xingqin Lin , Yi-Pin Eric Wang , Cagatay Capar , Jung-Fu Cheng , Havish Koorapaty
摘要： According to some embodiments, a method for use in a frequency-hopping wireless transmitter for transmitting in unlicensed spectrum comprises: obtaining a configuration for a plurality of frequency channels in unlicensed spectrum; and transmitting a data transmission according to a frequency-hopping pattern across the plurality of frequency channels. The configuration for the plurality of frequency channels comprises a first subset of frequency channels for downlink transmission and a second subset of frequency channels for uplink transmission. The frequency channels in the first and second subsets are mutually exclusive. In some embodiments the first and second subset of frequency channels each comprise 160 frequency channels in the 2.4 GHz band, or 50 frequency channels in the 915 MHz band.
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公开(公告)号：US10271325B2
公开(公告)日：2019-04-23
申请号：US14942690
申请日：2015-11-16
发明人： Amitav Mukherjee , Jung-Fu Cheng , Sorour Falahati , Du Ho Kang , Havish Koorapaty , Daniel Larsson , Yu Yang
摘要： Systems and methods relating to Listen before Talk (LBT) procedures suitable for, e.g., License Assisted Access (LAA) to an unlicensed frequency spectrum or Long Term Evolution Unlicensed (LTE-U) are disclosed. In some embodiments, a method of operation of a node of a cellular communications network comprises performing a LBT procedure for an observed channel in an unlicensed frequency spectrum. The LBT procedure defers at least one Clear Channel Assessment (CCA) slot such that the LBT procedure concludes at or near a desired starting point for a transmission. The at least one CCA slot comprises at least one of a first CCA slot of the LBT procedure, one or more intermediate CCA slots of the LBT procedure, and a final CCA slot of the LBT procedure. The method further comprises performing the transmission on the observed channel upon completion of the LBT procedure.
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公开(公告)号：US11147097B2
公开(公告)日：2021-10-12
申请号：US16099612
申请日：2017-05-19
摘要： Systems and methods are disclosed that relate to management of uplink (UL) transmissions in unlicensed spectrum. In some embodiments, a method of operation of a network node in a wireless communication network comprises signaling, to a wireless device, an indication of one or more allocated sets of Resource Blocks (RBs) that are allocated to the wireless device by a UL grant for transmission on a UL carrier in an unlicensed frequency spectrum. The one or more allocated sets of RBs are one or more of a plurality of defined sets of RBs that correspond to a plurality of interlaces, respectively, that each spread out across an entire bandwidth of the UL carrier. In this manner, higher UL user and system performance can be obtained.
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公开(公告)号：US20200336987A1
公开(公告)日：2020-10-22
申请号：US16092209
申请日：2017-04-07
发明人： Amitav Mukherjee , Havish Koorapaty
IPC分类号： H04W52/14 , H04W52/22 , H04W52/32 , H04W52/42 , H04W52/36 , H04W74/08 , H04W72/14 , H04W16/14
摘要： Systems and methods relating to transmit power control are disclosed. In some embodiments, a method of operation of a radio access node for providing transmit power control commands to a wireless device for uplink (UL) transmission on a cell that operates in an unlicensed frequency spectrum is provided. The method comprises indicating, for the cell that operates in the unlicensed frequency spectrum, a dynamic Transmit Power Control (TPC) command using a downlink (DL) control channel which indicates a DL-UL allocation of upcoming subframes in the cell that operates in the unlicensed frequency spectrum. In some embodiments, the DL control channel is a common DL control channel. In some other embodiments, the DL channel is a common Physical Downlink Control Channel (PDCCH).
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公开(公告)号：US20190239059A1
公开(公告)日：2019-08-01
申请号：US16327792
申请日：2017-11-21
CPC分类号： H04W8/005 , H04B1/7143 , H04J11/0069 , H04W4/70 , H04W4/80 , H04W16/14 , H04W24/10 , H04W56/001
摘要： According to some embodiments, a method for use in a wireless device of acquiring system information in a frequency-hopping network comprises obtaining an indication that the wireless device is configured for frequency hopping among a plurality of frequency channels. At least one of the plurality of frequency channels is a discovery channel. The discovery channel includes one or more dense discovery signals. A dense discovery signal is denser than a corresponding discovery signal included in the non-discovery channels of the plurality of frequency channels. The method further comprises tuning a radio receiver of the wireless device to the discovery channel, and acquiring system information using the one or more dense discovery signals. For example, a discovery signal (e.g. NPSS, NSSS, NPBCH, etc.) of the non-discovery channel may include one occurrence per frame and the corresponding discovery signal of the discovery channel includes more than one occurrence per frame.
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公开(公告)号：US20190150182A1
公开(公告)日：2019-05-16
申请号：US16099612
申请日：2017-05-19
摘要： Systems and methods are disclosed that relate to management of uplink (UL) transmissions in unlicensed spectrum. In some embodiments, a method of operation of a network node in a wireless communication network comprises signaling, to a wireless device, an indication of one or more allocated sets of Resource Blocks (RBs) that are allocated to the wireless device by a UL grant for transmission on a UL carrier in an unlicensed frequency spectrum. The one or more allocated sets of RBs are one or more of a plurality of defined sets of RBs that correspond to a plurality of interlaces, respectively, that each spread out across an entire bandwidth of the UL carrier. In this manner, higher UL user and system performance can be obtained.
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