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1. 发明授权

US11581999B2 Reference signal design for wireless communications 有权
公开(公告)号：US11581999B2
公开(公告)日：2023-02-14
申请号：US14876678
申请日：2015-10-06
申请人： QUALCOMM Incorporated
发明人： Wanshi Chen , Michael Mao Wang , Hao Xu , Yongbin Wei , Peter Gaal
IPC分类号： H04L5/00 , H04W4/70 , H04W72/00
摘要： Methods, systems, and devices are described for reference signal design in wireless communications. A base station may select a reference signal density scheme from a set of available density schemes associated with a port count. The reference signal density scheme may also be selected based on the category of the mobile device receiving the reference signal transmissions. The reference signal density scheme may be a higher density reference signal density scheme or a lower density reference signal density scheme, where the higher density reference signal density scheme includes more reference signal resource elements per subframe. The mobile device may determine the reference signal density scheme based on characteristics of a channel. The higher density reference signal density scheme may provide additional channel estimation opportunities for the mobile device. In some cases, the mobile device sends the channel estimated based on the received reference signals to the base station.

2. 发明申请

US20210127340A1 LOW LATENCY UPLINK POWER CONTROL 有权
公开(公告)号：US20210127340A1
公开(公告)日：2021-04-29
申请号：US17144748
申请日：2021-01-08
申请人： QUALCOMM Incorporated
发明人： Shimman Arvind Patel , Wanshi Chen , Peter Gaal , Hao Xu , Michael Mao Wang
IPC分类号： H04W52/34 , H04W52/36 , H04W72/04 , H04W52/14 , H04W52/16 , H04W28/06
摘要： Methods, systems, and devices for wireless communication are described. A user equipment (UE) may determine separate uplink (UL) power limitations for multiple transmission time interval (TTI) durations based on distinct power control parameters. In some cases, an adjustment factor or a power backoff may be applied to communications using one TTI duration to ensure that total transmit power does not exceed a threshold. The UE and the serving base station may also identify one or more demodulation reference signal (DMRS) windows. UL data transmissions may be demodulated based on a DMRS sent during the same window. Transmit power control (TPC) commands may be applied at the beginning of each window. However, if an UL transmission is scheduled at the beginning of the window, the UE may wait until a DMRS transmission or until no more transmissions are scheduled for the window before applying the TPC adjustment.

3. 发明授权

US10111113B2 Coverage enhancement level determination 有权
公开(公告)号：US10111113B2
公开(公告)日：2018-10-23
申请号：US15180297
申请日：2016-06-13
申请人： QUALCOMM Incorporated
发明人： Michael Mao Wang , Hao Xu , Peter Gaal , Wanshi Chen , Yongbin Wei
IPC分类号： H04W4/00 , H04W24/02 , H04L12/26 , H04W52/16 , H04W52/20 , H04W52/24
摘要： A wireless device may determine a coverage enhancement (CE) level (or coverage extension) by attempting to decode a received broadcast signal. The wireless device may attempt to decode a portion of the broadcast signal using a CE level that is less than the CE level of the broadcast. If the decoding attempt is successfully, the CE level may be declared as an operating CE level. If decoding is unsuccessful, the CE level may be increased decoding retried. The wireless device may continue to test-decode the broadcast signal at new (e.g., increasing) CE levels until a CE level is sufficient for a decode and is declared the operating CE level of the wireless device. In some cases, the wireless device test-decodes a broadcast channel after selecting a CE level based on a path loss measurement of a downlink signal (e.g., reference signal).

4. 发明申请

US20160374035A1 SYSTEM SCANNING AND ACQUISITION 审中-公开
标题翻译：系统扫描和获取
公开(公告)号：US20160374035A1
公开(公告)日：2016-12-22
申请号：US15184977
申请日：2016-06-16
申请人： QUALCOMM Incorporated
发明人： Michael Mao Wang , Hao Xu , Peter Gaal , Wanshi Chen , Yongbin Wei
IPC分类号： H04W56/00
CPC分类号： H04W56/004 , H04J11/0069 , H04W56/0005 , H04W56/0015
摘要： Methods, systems, and devices for wireless communication are described. A user equipment (UE) may identify a set of non-overlapping periodic intervals for monitoring a synchronization signal, which may be composed of or may include a repeated sequence; and the UE may identify possible timing structure (e.g., subframe, slot, etc.) boundaries using the intervals. The UE may then determine that one of the possible boundaries is a boundary using a second synchronization signal. For instance, the UE may perform a cumulative correlation during each of a series of correlation periods corresponding to the periodic intervals. Each of the cumulative correlations may contain multiple coherent correlations associated with the sequence repetitions. From the cumulative correlations, the UE may identify possible boundaries. The UE may perform a secondary correlation based on a second synchronization signal for each possible boundary in order to determine the system timing.
摘要翻译：描述了用于无线通信的方法，系统和设备。用户设备（UE）可以识别用于监视同步信号的一组非重叠周期性间隔，该同步信号可以由重复序列组成或可包括重复序列; 并且UE可以使用间隔识别可能的定时结构（例如，子帧，时隙等）边界。然后，UE可以使用第二同步信号来确定可能边界中的一个是边界。例如，UE可以在对应于周期性间隔的一系列相关周期中的每一个期间执行累积相关。每个累积相关可以包含与序列重复相关联的多个相干相关。从累积相关性，UE可以识别可能的边界。 UE可以基于每个可能边界的第二同步信号执行二次相关，以便确定系统时序。

5. 发明申请

US20160270059A1 DMRS BASED DL FOR LOW LATENCY 审中-公开
标题翻译：基于DMRS的DL用于低延迟
公开(公告)号：US20160270059A1
公开(公告)日：2016-09-15
申请号：US15013151
申请日：2016-02-02
申请人： QUALCOMM Incorporated
发明人： Wanshi Chen , Shimman Arvind Patel , Peter Gaal , Hao Xu , Michael Mao Wang
IPC分类号： H04W72/04
CPC分类号： H04L5/0051 , H04W48/12
摘要： Methods, systems, and devices are described for wireless communication at a device. Demodulation reference signals (DMRS) may be used to facilitate demodulation of low latency control or data channels, or both. A wireless communication device may, for example, identify a carrier configuration with transmission time intervals (TTIs) of different durations. A carrier may be configured with TTIs that support low latency operations. A DMRS pattern for resources of a low latency TTI may be determined, and that first DMRS pattern may be based on a DMRS pattern for resources of another, longer-duration TTI. Devices may thus communicate using resources of a low latency TTI based on the first DMRS pattern. For example, a user equipment (UE) may demodulate resources of a low latency channel using the first DMRS pattern, and the first DMRS pattern may be consistent with DMRS patterns supporting non-low latency within a common wireless system.
摘要翻译：描述了在设备处的无线通信的方法，系统和设备。解调参考信号（DMRS）可用于促进低延迟控制或数据信道的解调，或两者兼有。无线通信设备可以例如以不同持续时间的传输时间间隔（TTI）识别载波配置。运营商可以配置支持低延迟操作的TTI。可以确定用于低延迟TTI的资源的DMRS模式，并且第一DMRS模式可以基于用于另一较长持续时间TTI的资源的DMRS模式。因此，设备可以使用基于第一DMRS模式的低延迟TTI的资源进行通信。例如，用户设备（UE）可以使用第一DMRS模式来解调低等待时间信道的资源，并且第一DMRS模式可以与在公共无线系统中支持非低延迟的DMRS模式一致。

6. 发明申请

US20160261391A1 SIMPLIFIED HARQ MANAGEMENT 审中-公开
标题翻译：简化的HARQ管理
公开(公告)号：US20160261391A1
公开(公告)日：2016-09-08
申请号：US15059153
申请日：2016-03-02
申请人： QUALCOMM Incorporated
发明人： Wanshi Chen , Durga Prasad Malladi , Aleksandar Damnjanovic , Shimman Arvind Patel , Madhavan Srinivasan Vajapeyam , Michael Mao Wang , Hao Xu , Peter Gaal
IPC分类号： H04L5/00 , H04W76/04 , H04L1/18
CPC分类号： H04W76/27 , H04L1/1812 , H04L1/1825 , H04L1/1861 , H04L1/1864 , H04L5/001 , H04L5/0023 , H04L5/005 , H04L5/0055 , H04L5/14
摘要： Methods for managing hybrid automatic repeat request (HARQ) feedback are disclosed, where HARQ feedback operations by a receiving device may be modified. A receiving device may receive a data transmission. The receiving device may evaluate a condition for determining how to provide HARQ feedback in response to the data transmission. The receiving device may modify a HARQ feedback operation based at least in part on the condition. Modification of HARQ feedback operations may include turning off HARQ feedback, excluding negative acknowledgment (NAK) reporting, or excluding acknowledgement (ACK) reporting.
摘要翻译：公开了用于管理混合自动重传请求（HARQ）反馈的方法，其中可以修改接收设备的HARQ反馈操作。接收设备可以接收数据传输。接收设备可以评估用于响应于数据传输来确定如何提供HARQ反馈的条件。接收设备可以至少部分地基于条件修改HARQ反馈操作。 HARQ反馈操作的修改可以包括关闭HARQ反馈，排除否定确认（NAK）报告，或排除确认（ACK）报告。

7. 发明授权

US09246728B2 System and method for frequency diversity 有权
标题翻译：频率分集的系统和方法
公开(公告)号：US09246728B2
公开(公告)日：2016-01-26
申请号：US13767834
申请日：2013-02-14
申请人： QUALCOMM Incorporated
发明人： Michael Mao Wang , Murali Ramaswamy Chari , Ashok Mantravadi , Fuyun Ling , Rajiv Vijayan , Raghuraman Krishnamoorthi
IPC分类号： H04B7/216 , H04L27/26 , H04L1/00 , H03M13/27 , H03M13/31 , H03M13/25 , H04L5/00 , H03M13/29 , H04L1/04
CPC分类号： H04L27/2601 , H03M13/258 , H03M13/271 , H03M13/2957 , H03M13/31 , H04L1/0071 , H04L1/04 , H04L5/0007 , H04L5/0042 , H04L5/0044 , H04L5/0064 , H04L5/0083 , H04L27/2626 , H04L27/2634
摘要： A system and method for frequency diversity uses interleaving in a wireless communication system utilizing orthogonal frequency division multiplexing (OFDM) with various FFT sizes. Subcarriers of one or more interlaces are interleaved in a bit reversal fashion and the one or more interlaces are interleaved in the bit reversal fashion.
摘要翻译：用于频率分集的系统和方法在利用具有各种FFT大小的正交频分复用（OFDM）的无线通信系统中使用交织。一个或多个交错的子载波以位反向方式进行交织，并且该一个或多个交织以比特反转方式进行交织。

8. 发明授权

US09204379B2 Preamble structure and acquisition for a wireless communication system 有权
标题翻译：无线通信系统的前导结构和采集
公开(公告)号：US09204379B2
公开(公告)日：2015-12-01
申请号：US14101929
申请日：2013-12-10
申请人： QUALCOMM Incorporated
发明人： Michael Mao Wang
IPC分类号： H04B7/212 , H04W48/16 , H04L5/00 , H04L25/03 , H04L27/00 , H04L27/26 , H04J3/02
CPC分类号： H04W48/16 , H04J3/02 , H04L5/0007 , H04L5/0016 , H04L5/0048 , H04L25/03866 , H04L27/0014 , H04L27/2604 , H04L27/2605 , H04L27/2613 , H04L27/2657 , H04L27/2662 , H04L2027/0034 , H04L2027/0095
摘要： Techniques for sending sector/system information in TDM pilots using a hierarchical pilot structure are described. A base station sends multiple sets of bits for the sector/system information in multiple TDM pilots. The set of bits sent in a given TDM pilot may include bits sent in earlier TDM pilots. In one design, the base station generates a first TDM pilot based on a first set of bits, generates a second TDM pilot based on a second set of bits that includes the first set, generates a third TDM pilot based on all bits for the information, and sends the TDM pilots. A terminal performs detection to obtain a first detected value for the first TDM pilot, performs detection based on the first detected value to obtain a second detected value for the second TDM pilot, and performs detection based on the first and second detected values to obtain a third detected value for the third TDM pilot.
摘要翻译：描述了使用分层导频结构在TDM导频中发送扇区/系统信息的技术。基站在多个TDM导频中为扇区/系统信息发送多组比特。在给定的TDM导频中发送的比特集合可以包括在先前的TDM导频中发送的比特。在一种设计中，基站基于第一组比特生成第一TDM导频，基于包括第一组的第二组比特生成第二TDM导频，基于所述信息的所有比特生成第三TDM导频并发送TDM导频。终端执行检测以获得用于第一TDM导频的第一检测值，基于第一检测值进行检测，以获得第二TDM导频的第二检测值，并且基于第一和第二检测值进行检测，以获得第三个TDM导频的第三个检测值。

9. 发明申请

US20140092893A1 PREAMBLE STRUCTURE AND ACQUISITION FOR A WIRELESS COMMUNICATION SYSTEM 有权
标题翻译：无线通信系统的前瞻性结构和获取
公开(公告)号：US20140092893A1
公开(公告)日：2014-04-03
申请号：US14101929
申请日：2013-12-10
申请人： QUALCOMM Incorporated
发明人： Michael Mao Wang
IPC分类号： H04W48/16 , H04J3/02
CPC分类号： H04W48/16 , H04J3/02 , H04L5/0007 , H04L5/0016 , H04L5/0048 , H04L25/03866 , H04L27/0014 , H04L27/2604 , H04L27/2605 , H04L27/2613 , H04L27/2657 , H04L27/2662 , H04L2027/0034 , H04L2027/0095
摘要： Techniques for sending sector/system information in TDM pilots using a hierarchical pilot structure are described. A base station sends multiple sets of bits for the sector/system information in multiple TDM pilots. The set of bits sent in a given TDM pilot may include bits sent in earlier TDM pilots. In one design, the base station generates a first TDM pilot based on a first set of bits, generates a second TDM pilot based on a second set of bits that includes the first set, generates a third TDM pilot based on all bits for the information, and sends the TDM pilots. A terminal performs detection to obtain a first detected value for the first TDM pilot, performs detection based on the first detected value to obtain a second detected value for the second TDM pilot, and performs detection based on the first and second detected values to obtain a third detected value for the third TDM pilot.
摘要翻译：描述了使用分层导频结构在TDM导频中发送扇区/系统信息的技术。基站在多个TDM导频中为扇区/系统信息发送多组比特。在给定的TDM导频中发送的比特集合可以包括在先前的TDM导频中发送的比特。在一种设计中，基站基于第一组比特生成第一TDM导频，基于包括第一组的第二组比特生成第二TDM导频，基于所述信息的所有比特生成第三TDM导频并发送TDM导频。终端执行检测以获得用于第一TDM导频的第一检测值，基于第一检测值进行检测，以获得第二TDM导频的第二检测值，并且基于第一和第二检测值进行检测，以获得第三个TDM导频的第三个检测值。

10. 发明授权

US11191040B2 Low latency uplink power control 有权
公开(公告)号：US11191040B2
公开(公告)日：2021-11-30
申请号：US16183668
申请日：2018-11-07
申请人： QUALCOMM Incorporated
发明人： Shimman Arvind Patel , Wanshi Chen , Peter Gaal , Hao Xu , Michael Mao Wang
IPC分类号： H04W4/00 , H04W52/34 , H04W52/36 , H04W72/04 , H04W52/14 , H04W52/16 , H04W28/06 , H04L5/00 , H04W52/24 , H04L5/14
摘要： Methods, systems, and devices for wireless communication are described. A user equipment (UE) may determine separate uplink (UL) power limitations for multiple transmission time interval (TTI) durations based on distinct power control parameters. In some cases, an adjustment factor or a power backoff may be applied to communications using one TTI duration to ensure that total transmit power does not exceed a threshold. The UE and the serving base station may also identify one or more demodulation reference signal (DMRS) windows. UL data transmissions may be demodulated based on a DMRS sent during the same window. Transmit power control (TPC) commands may be applied at the beginning of each window. However, if an UL transmission is scheduled at the beginning of the window, the UE may wait until a DMRS transmission or until no more transmissions are scheduled for the window before applying the TPC adjustment.

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