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公开(公告)号：US20240364394A1
公开(公告)日：2024-10-31
申请号：US18764654
申请日：2024-07-05
IPC分类号： H04B7/0456 , H04B7/06 , H04L1/1607 , H04L5/00
CPC分类号： H04B7/0478 , H04B7/0469 , H04B7/0473 , H04B7/0486 , H04B7/0626 , H04B7/0639 , H04B7/0658 , H04L1/1614 , H04L5/0048
摘要： A user equipment (UE) receives, from a network node, codebook subset restriction (CBSR) signaling comprising a bitmap. The bitmap comprises a plurality of bits. A bit of the plurality of bits mapped to a first index indicates whether a vector with the first index from a first set of vectors is restricted. Bits of the plurality of bits mapped within a particular window indicate whether a vector with a second index from the second set of vectors is restricted. The UE restricts precoders selectable from a plurality of codebooks based on the restricted vectors.
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公开(公告)号：US12127190B2
公开(公告)日：2024-10-22
申请号：US18552850
申请日：2022-04-04
发明人： Siva Muruganathan , Shiwei Gao
IPC分类号： H04L5/00 , H04L1/08 , H04W72/1268 , H04W72/232
CPC分类号： H04W72/1268 , H04L1/08 , H04L5/0051 , H04W72/232
摘要： Systems and methods for non-codebook based multi-Transmit and Reception Point (TRP) Physical Uplink Shared Channel (PUSCH) are provided. In some embodiments, a method performed by a wireless device includes: receiving a configuration of a first or second Phase-Tracking Reference Signals (PT-RS) port index per Sounding Reference Signal (SRS) resource in two SRS resource sets for non-codebook based PUSCH; receiving indication of: a first set of SRS Resource Indicators (SRIs) from a first SRS resource set; and/or a second set of SRIs from a second SRS resource set; determining at least one of: a first number of PT-RS ports to be transmitted according to the SRS resources indicated in the first set of SRIs; and a second number of PT-RS ports to be transmitted according to the SRS resources indicated in the second set of SRIs; and transmitting the determined number of PT-RS ports along with a plurality of PUSCH repetitions.
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3.发明授权公开(公告)号：US12108393B2
公开(公告)日：2024-10-01
申请号：US17867168
申请日：2022-07-18
发明人： Siva Muruganathan , Sebastian Faxér , Mattias Frenne , Shiwei Gao , Simon Järmyr
IPC分类号： H04W72/1273 , H04L5/00 , H04W72/0446 , H04W72/23 , H04W72/51
CPC分类号： H04W72/1273 , H04L5/0051 , H04W72/0446 , H04W72/23 , H04W72/51
摘要： A method for differentiating multiple Physical Downlink Shared Channel (PDSCH) transmission schemes. In a non-limiting example, the PDSCH transmission schemes include a spatial multiplexing transmission scheme, a frequency multiplexing transmission scheme, a slot-based time multiplexing transmission scheme, and a mini-slot-based time multiplexing transmission scheme. In examples discussed herein, a User Equipment (UE) can be configured to differentiate the PDSCH transmission schemes based on information indicated in Downlink Control Information (DCI) for scheduling a PDSCH transmission, information signaled to the UE via a higher layer configuration, and/or capability signaling indicated from the UE to a network. By differentiating the PDSCH transmission schemes, the UE can efficiently receive a data transmission(s) from multiple Transmission/Reception Points (TRPs).
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公开(公告)号：US20240324029A1
公开(公告)日：2024-09-26
申请号：US18731973
申请日：2024-06-03
发明人： Xingqin Lin , Shiwei Gao , Helka-Liina Määttänen , Siva Muruganathan , Jonas Sedin , Hazhir Shokri Razaghi , Zhenhua Zou
IPC分类号： H04W74/0833 , H04W56/00 , H04W76/11 , H04W84/06
CPC分类号： H04W74/0841 , H04W56/0075 , H04W76/11 , H04W84/06
摘要： Systems and methods are disclosed for random access in a wireless communication system such as, e.g., a wireless communication system having a non-terrestrial (e.g., satellite-based) radio access network. Embodiments of a method performed by a wireless device and corresponding embodiments of a wireless device are disclosed. In some embodiments, a method performed by a wireless device for random access comprises performing an open-loop timing advance estimation procedure to thereby determine an open-loop timing advance estimate for an uplink between the wireless device and a base station. The method further comprises transmitting a random access preamble using the open-loop timing advance estimate. In this manner, random access can be performed even in the presence of a long propagation delay such as that present in a satellite-based radio access network. Embodiments of a method performed by a base station and corresponding embodiments of a base station are also disclosed.
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公开(公告)号：US20240322977A1
公开(公告)日：2024-09-26
申请号：US18736065
申请日：2024-06-06
发明人： Mattias Frenne , Shiwei Gao , Siva Muruganathan
CPC分类号： H04L5/0053 , H04B7/08 , H04L5/0023 , H04L5/0048 , H04L5/0094 , H04W72/23
摘要： A method for a UE in a multiple transmission points communication system, mTRP, scheme, is provided. The method includes receiving downlink control information, DCI, indicating at least two transmission points scheme for a scheduled data transmission on physical resource blocks, PRBs. The PRBs includes at least a first subsets of PRBs, associated with a first transmission point, and a second subset of PRBs, associated with a second transmission point. The method further includes determining a first PT-RS frequency density for the first set of PRBs based on the number of PRBs in the first set of PRBs and a second PT-RS frequency density based on the number of PRBs in the second set of PRBs. A UE, methods for a base station and a base station are also provided.
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公开(公告)号：US11984954B2
公开(公告)日：2024-05-14
申请号：US17764024
申请日：2020-10-01
发明人： Sebastian Faxér , Mattias Frenne , Shiwei Gao , Siva Muruganathan
CPC分类号： H04B7/0626 , H04W24/08 , H04W72/23
摘要： Systems and methods for flexible triggering of Channel State Information (CSI) reports are provided. A method performed by a wireless device for transmitting a CSI report according to a timeline requirement includes one or more of: determining to enable timeline switching; receiving an instruction to determine a first CSI report; determining to stop determining an existing ongoing second CSI report; determining the first CSI report; and transmitting the first CSI report. In this way, some embodiments allow ultra-low latency CSI reporting also for the cases when the wireless device is already in the ongoing process of determining a CSI report. In some embodiments, Ultra-Reliable Low-Latency Communication (URLLC) CSI reports are allowed to “override” previous CSI calculations. Some embodiments achieve more flexible triggering of URLLC CSI reports so that the ultra-low latency CSI timeline can be applied for more cases, reducing the CSI latency and resulting in more reliable URLLC scheduling.
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公开(公告)号：US11979222B2
公开(公告)日：2024-05-07
申请号：US17280304
申请日：2019-09-19
发明人： Jonas Sedin , Björn Hofström , Xingqin Lin , Helka-Liina Määttänen , Siva Muruganathan , Hazhir Shokri Razaghi , Zhenhua Zou
IPC分类号： H04B7/185 , H04L1/1867 , H04W74/0833
CPC分类号： H04B7/18528 , H04L1/1883 , H04W74/0833
摘要： Systems and methods for adapting a timer(s) for a satellite-based radio access network are disclosed. Embodiments of a method performed by a wireless device and corresponding embodiments of a wireless device are disclosed. In some embodiments, a method performed by a wireless device comprises obtaining a value to be used to offset, extend, and/or scale one or more timers related to the satellite-based radio access network relative to values for non-satellite-based radio access networks. The method further comprises utilizing the value to offset a start of one or more timers, extend one or more timers, and/or scale one or more timers and performing one or more actions based on the one or more offset timers, the one or more extended timers, and/or the one or more scaled timers. Embodiments of a method performed by a base station and corresponding embodiments of a base station are also disclosed.
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公开(公告)号：US11968542B2
公开(公告)日：2024-04-23
申请号：US17533591
申请日：2021-11-23
发明人： Siva Muruganathan , Sebastian Faxér , Mattias Frenne , Shiwei Gao , Stephen Grant , Robert Mark Harrison
CPC分类号： H04W16/14 , H04L5/0007 , H04L5/0094 , H04W72/23
摘要： A wireless device (WD), network node and methods are provided for rate matching using dynamically indicated reference signals in a co-carrier co-existence scenario. According to one aspect, a method in a network node includes determining a physical downlink shared channel (PDSCH) resource element (RE) mapping for a plurality of aperiodic zero power reference signal (ZP-RS) resources. The method also includes transmitting to a first wireless device (WD) configured to operate according to a first radio access technology (RAT), a first indication of first aperiodic ZP-RS resources of the plurality of aperiodic ZP-RS resources to be excluded during a PDSCH RE mapping by the first WD to avoid a conflict with second aperiodic ZP-RS resources indicated to a second WD configured to operate according to a second RAT.
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公开(公告)号：US11895053B2
公开(公告)日：2024-02-06
申请号：US17855981
申请日：2022-07-01
IPC分类号： H04L5/00 , H04W72/0446
CPC分类号： H04L5/0048 , H04W72/0446
摘要： A network node, wireless device, base station, user equipment and corresponding methods are provided. The network node includes processing circuitry configured to: select a first set and second set of reference signal resources in a subframe and aggregate the first set and second set of reference signal resources in the subframe to form a code division multiplexing, CDM, aggregation configuration. The first set and second set of reference signal resources in the subframe satisfy a temporal criterion such that any two resource elements in the first set and second set of reference signal resources have up to a maximum time separation of six OFDM symbols. The first set and second set of reference signal resources in the subframe satisfy a frequency criterion such that any two resource elements in the first set and second set of reference signal resources have up to a maximum frequency separation of six subcarriers.
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公开(公告)号：US20240015732A1
公开(公告)日：2024-01-11
申请号：US18032967
申请日：2021-10-25
发明人： Siva Muruganathan , Shiwei Gao , Yufei Blankenship , Zhipeng Lin
IPC分类号： H04W72/1268 , H04W16/28 , H04L5/00 , H04W72/232 , H04B7/06
CPC分类号： H04W72/1268 , H04W16/28 , H04L5/0051 , H04W72/232 , H04B7/0626
摘要： Systems and methods for aperiodic Channel State Information (CSI) over multi-Transmission/Reception Point (TRP) Physical Uplink Shared Channel (PUSCH) are provided. In some embodiments, a method performed by a wireless device for providing feedback includes: repeating PUSCH over multiple M>1 PUSCH occasions with P spatial relations and/or Uplink Transmission Configuration Indicator (TCI) states; and multiplexing Aperiodic CSI (A-CSI) with PUSCH on N>=1 PUSCH transmission occasions wherein N includes at least one PUSCH transmission occasion associated with each of the P spatial relations or UL TCI states. This may enable improved A-CSI reliability in multi-TRP scenarios. By repeating A-CSI (multiplexed with PUSCH or not multiplexed with PUSCH) over multiple TRPs, the reliability of A-CSI can be improved since the A-CSI can be received by at least one TRP. This method is particularly beneficial in FR2 cases where the channel between a TRP and a UE can experience channel blocking.
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