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公开(公告)号:US20210099992A1
公开(公告)日:2021-04-01
申请号:US16971210
申请日:2018-02-23
Applicant: Nokia Technologies Oy
Inventor: Xiaomao Mao , Fred Vook , Hao Liu
IPC: H04W72/04 , H04B7/0417 , H04B7/0456 , H04L5/00 , H04W72/08
Abstract: An UL channel for a UE is measured based on reference signal (s) to determine UL channel information. DL channel information is inferred based on UL-DL channel reciprocity and the determined UL channel information. Reporting is configured based on the inferred DL channel information for CSI for the UE and resource (s) are allocated for the UE to use to report the CSI. Information is signaled to the UE indicating a configuration of the reporting of CSI and the resource (s). DL reference signal (s) are transmitted toward the UE to be used for determination of the CSI. Report (s) of CSI are received on the allocated resource (s). The UE receives the configuration, determines the CSI using the configuration and the received DL reference signal (s) and fits the determined CSI into the allocated resource (s). The UE transmits the determined CSI on the allocated resource (s).
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公开(公告)号:US11770735B2
公开(公告)日:2023-09-26
申请号:US17312656
申请日:2019-01-17
Applicant: Nokia Technologies Oy
Inventor: Xiaomao Mao
CPC classification number: H04W28/0289 , H04L5/0048 , H04W72/52
Abstract: Method, apparatuses, and computer program product for overhead reduction are provided. One method may include determining a channel sparsity. The method may also include determining a shut-off ratio based on the channel sparsity ratio. In addition, the method may include providing feedback to a network node of a suggested shutoff pattern or a shut-off index from a shut-off table for reference signals, and receiving instructions from the network node to execute a shut-off pattern or a shut-off index selected by the network node. Further, the method may include executing a shut-off procedure according to the shut-off pattern or the shut-off index selected by the network node.
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公开(公告)号:US20230075545A1
公开(公告)日:2023-03-09
申请号:US17470037
申请日:2021-09-09
Applicant: Nokia Technologies Oy
Inventor: Gilsoo Lee , Nitin Mangalvedhe , Rapeepat Ratasuk , Xiaomao Mao , ManHung Ng
Abstract: Example embodiments of the invention provide at least a method an apparatus to perform reporting, by the apparatus, information comprises an indication of at least one aggregation level for a performance target of a physical downlink control channel; receiving, from a network node of the communication network, an assignment for a search space set comprising at least one physical downlink control channel candidate; and based on the assignment, performing blind detection of a physical downlink control channel on the at least one assigned physical downlink control channel candidate. Further, to perform at least determining by a network node of a communication network for user equipment of the communication network information comprising at least one aggregation level for a performance target of at least one physical downlink control channel candidate and of an assigned search space set; and communicating towards the user equipment information comprising an assignment for a search space set comprising at least one physical downlink control channel candidate for performing blind detection of a physical downlink control channel on the at least one physical downlink control channel candidate.
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公开(公告)号:US11683758B2
公开(公告)日:2023-06-20
申请号:US17470037
申请日:2021-09-09
Applicant: Nokia Technologies Oy
Inventor: Gilsoo Lee , Nitin Mangalvedhe , Rapeepat Ratasuk , Xiaomao Mao , ManHung Ng
CPC classification number: H04W52/0229 , H04L27/2676
Abstract: Example embodiments of the invention provide at least a method an apparatus to perform reporting, by the apparatus, information comprises an indication of at least one aggregation level for a performance target of a physical downlink control channel; receiving, from a network node of the communication network, an assignment for a search space set comprising at least one physical downlink control channel candidate; and based on the assignment, performing blind detection of a physical downlink control channel on the at least one assigned physical downlink control channel candidate. Further, to perform at least determining by a network node of a communication network for user equipment of the communication network information comprising at least one aggregation level for a performance target of at least one physical downlink control channel candidate and of an assigned search space set; and communicating towards the user equipment information comprising an assignment for a search space set comprising at least one physical downlink control channel candidate for performing blind detection of a physical downlink control channel on the at least one physical downlink control channel candidate.
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公开(公告)号:US20200169309A1
公开(公告)日:2020-05-28
申请号:US16611614
申请日:2018-05-08
Applicant: Nokia Technologies Oy
Inventor: Frederick Vook , William Hillery , Mihai Enescu , Eugene Visotsky , Xiaomao Mao , Nitin Mangalvedhe
IPC: H04B7/06 , H04B7/0456
Abstract: Various communication system may benefit from the appropriate selection of communication parameters. For example, certain wireless communication systems may benefit from the user of a low-overhead high-rank codebook. A method can include determining a first partition of a precoding matrix with a higher resolution and a second partition of the precoding matrix with a lower resolution. The method can also include feeding back the first partition and the second partition.
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公开(公告)号:US12040855B2
公开(公告)日:2024-07-16
申请号:US17258541
申请日:2018-08-30
Applicant: Nokia Technologies Oy
Inventor: Xiaomao Mao
IPC: H04B7/0426 , H04B7/0417 , H04B7/06
CPC classification number: H04B7/043 , H04B7/0417 , H04B7/0617 , H04B7/0626
Abstract: In accordance with some embodiments, an apparatus may include means for determining time and frequency domain correlation of at least one channel with respect to direction of at least one dominant Eigen beam. The apparatus may further include means for applying at least one common channel hardening matrix within the correlation time and bandwidth based on a first time periodicity. The apparatus may further include means for applying a 2-dimensional fast fourier transform within the correlation time and bandwidth associated with the at least one common channel hardening matrix. The apparatus may further include means for reporting at least one tap location based on a second time periodicity that is associated with the at least one common channel hardening matrix to at least one network entity.
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公开(公告)号:US11115097B2
公开(公告)日:2021-09-07
申请号:US16477220
申请日:2017-12-28
Applicant: Nokia Technologies Oy
Inventor: Xiaomao Mao
IPC: H04B7/06 , H04B7/0417 , H04B7/0456
Abstract: A method including evaluating a number of constituent precoders to be used in providing a single precoder to include in an explicit channel state information (CSI) report, to be transmitted from a user terminal to at least one device in a network, and combining the constituent precoders to form the single precoder in response to a determination that the number of constituent precoders to be used in providing the single precoder is greater than one. The method includes configuring to signal to transmit the explicit CSI report including the single precoder from the user terminal to the at least one device in the network.
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公开(公告)号:US20210175949A1
公开(公告)日:2021-06-10
申请号:US17045510
申请日:2018-04-13
Applicant: Nokia Technologies Oy
Inventor: Rana Ahmed , Thorsten Wild , Keeth Jayasinghe , Mihai Enescu , Xiaomao Mao , Wolfgang Zirwas , Rakash SivaSiva Ganesan , Amir Mehdi Ahmadian Tehrani
Abstract: Methods, apparatus, and computer program products for a user equipment receiving CSI-RS and computing channel support information. Based on the CSI, the UE derives tap locations of channel support, depending on the observed channel and used subcarrier spacing. The deriving can additionally be done in relation to power class and window size. The UE apprises a base station of those tap locations of the channel support and also informs the base station of the strongest tap locations, which can be done in various ways comprising a bit mask. Methods, apparatus, and computer program products for a base station to send CSI-RS to a UE for computing CSI feedback. The CSI-RS resources can be for one or multiple transmit receive points. The base station receives back an indication of tap locations and a bit mask and builds information on tap locations by combining that received indication and bit mask.
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公开(公告)号:US11889425B2
公开(公告)日:2024-01-30
申请号:US17471860
申请日:2021-09-10
Applicant: NOKIA TECHNOLOGIES OY
Inventor: Ryan Keating , Xiaomao Mao , Nitin Mangalvedhe , Rapeepat Ratasuk , Muhammad Majid Butt , Man Hung Ng
CPC classification number: H04W52/0261 , H04L5/0051 , H04W8/22 , H04W64/003
Abstract: Systems, methods, apparatuses, and computer program products for positioning support are provided. One method may include receiving, by a UE configured with power saving feature(s), positioning performance requirements for a positioning session. The method may also include estimating an impact of one or more power saving or reduced capability features on positioning measurements associated with the positioning session and, based on the accuracy and latency requirements and the estimated impact, determining the power saving or reduced capability features that the UE can implement while still achieving the accuracy and latency requirements for the positioning session. The method may then include signaling, to a network node, information on the determined power saving or reduced capability features that the UE can implement while still achieving the required accuracy and latency requirements for the positioning session.
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公开(公告)号:US11469809B2
公开(公告)日:2022-10-11
申请号:US17045510
申请日:2018-04-13
Applicant: Nokia Technologies Oy
Inventor: Rana Ahmed , Thorsten Wild , Keeth Saliya Jayasinghe Laddu , Mihai Enescu , Xiaomao Mao , Wolfgang Zirwas , Rakash SivaSiva Ganesan , Amir Mehdi Ahmadian Tehrani
Abstract: Methods, apparatus, and computer program products for a user equipment receiving CSI-RS and computing channel support information. Based on the CSI, the UE derives tap locations of channel support, depending on the observed channel and used subcarrier spacing. The deriving can additionally be done in relation to power class and window size. The UE apprises a base station of those tap locations of the channel support and also informs the base station of the strongest tap locations, which can be done in various ways comprising a bit mask. Methods, apparatus, and computer program products for a base station to send CSI-RS to a UE for computing CSI feedback. The CSI-RS resources can be for one or multiple transmit receive points. The base station receives back an indication of tap locations and a bit mask and builds information on tap locations by combining that received indication and bit mask.
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