BR112020002514A2 - técnicas para feixes de potência não zero em sistemas sem fio - Google Patents

técnicas para feixes de potência não zero em sistemas sem fio Download PDF

Info

Publication number
BR112020002514A2
BR112020002514A2 BR112020002514-3A BR112020002514A BR112020002514A2 BR 112020002514 A2 BR112020002514 A2 BR 112020002514A2 BR 112020002514 A BR112020002514 A BR 112020002514A BR 112020002514 A2 BR112020002514 A2 BR 112020002514A2
Authority
BR
Brazil
Prior art keywords
beams
zero power
antenna ports
indicator
power
Prior art date
Application number
BR112020002514-3A
Other languages
English (en)
Portuguese (pt)
Inventor
Chenxi HAO
Yu Zhang
Liangming WU
Chao Wei
Wanshi Chen
Hao Xu
Original Assignee
Qualcomm Incorporated
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Qualcomm Incorporated filed Critical Qualcomm Incorporated
Publication of BR112020002514A2 publication Critical patent/BR112020002514A2/pt

Links

Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04BTRANSMISSION
    • H04B7/00Radio transmission systems, i.e. using radiation field
    • H04B7/02Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/06Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
    • H04B7/0613Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
    • H04B7/0615Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal
    • H04B7/0619Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal using feedback from receiving side
    • H04B7/0621Feedback content
    • H04B7/0626Channel coefficients, e.g. channel state information [CSI]
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04BTRANSMISSION
    • H04B7/00Radio transmission systems, i.e. using radiation field
    • H04B7/02Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/0413MIMO systems
    • H04B7/0456Selection of precoding matrices or codebooks, e.g. using matrices antenna weighting
    • H04B7/046Selection of precoding matrices or codebooks, e.g. using matrices antenna weighting taking physical layer constraints into account
    • H04B7/0469Selection of precoding matrices or codebooks, e.g. using matrices antenna weighting taking physical layer constraints into account taking special antenna structures, e.g. cross polarized antennas into account
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04BTRANSMISSION
    • H04B7/00Radio transmission systems, i.e. using radiation field
    • H04B7/02Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/0408Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas using two or more beams, i.e. beam diversity
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04BTRANSMISSION
    • H04B7/00Radio transmission systems, i.e. using radiation field
    • H04B7/02Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/0413MIMO systems
    • H04B7/0456Selection of precoding matrices or codebooks, e.g. using matrices antenna weighting
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04BTRANSMISSION
    • H04B7/00Radio transmission systems, i.e. using radiation field
    • H04B7/02Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/0413MIMO systems
    • H04B7/0456Selection of precoding matrices or codebooks, e.g. using matrices antenna weighting
    • H04B7/0478Special codebook structures directed to feedback optimisation
    • H04B7/0481Special codebook structures directed to feedback optimisation using subset selection of codebooks
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04BTRANSMISSION
    • H04B7/00Radio transmission systems, i.e. using radiation field
    • H04B7/02Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/06Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
    • H04B7/0613Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
    • H04B7/0615Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal
    • H04B7/0617Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal for beam forming
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04BTRANSMISSION
    • H04B7/00Radio transmission systems, i.e. using radiation field
    • H04B7/02Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/06Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
    • H04B7/0613Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
    • H04B7/0615Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal
    • H04B7/0619Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal using feedback from receiving side
    • H04B7/0621Feedback content
    • H04B7/063Parameters other than those covered in groups H04B7/0623 - H04B7/0634, e.g. channel matrix rank or transmit mode selection
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04BTRANSMISSION
    • H04B7/00Radio transmission systems, i.e. using radiation field
    • H04B7/02Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/06Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
    • H04B7/0613Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
    • H04B7/0682Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission using phase diversity (e.g. phase sweeping)
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04BTRANSMISSION
    • H04B7/00Radio transmission systems, i.e. using radiation field
    • H04B7/02Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/06Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
    • H04B7/0686Hybrid systems, i.e. switching and simultaneous transmission
    • H04B7/0695Hybrid systems, i.e. switching and simultaneous transmission using beam selection
    • H04B7/06952Selecting one or more beams from a plurality of beams, e.g. beam training, management or sweeping
    • H04B7/0696Determining beam pairs
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04BTRANSMISSION
    • H04B7/00Radio transmission systems, i.e. using radiation field
    • H04B7/02Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/06Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
    • H04B7/0686Hybrid systems, i.e. switching and simultaneous transmission
    • H04B7/0695Hybrid systems, i.e. switching and simultaneous transmission using beam selection
    • H04B7/06952Selecting one or more beams from a plurality of beams, e.g. beam training, management or sweeping
    • H04B7/06966Selecting one or more beams from a plurality of beams, e.g. beam training, management or sweeping using beam correspondence; using channel reciprocity, e.g. downlink beam training based on uplink sounding reference signal [SRS]
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00Arrangements affording multiple use of the transmission path
    • H04L5/003Arrangements for allocating sub-channels of the transmission path
    • H04L5/0048Allocation of pilot signals, i.e. of signals known to the receiver
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W24/00Supervisory, monitoring or testing arrangements
    • H04W24/08Testing, supervising or monitoring using real traffic
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W24/00Supervisory, monitoring or testing arrangements
    • H04W24/10Scheduling measurement reports ; Arrangements for measurement reports
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W72/00Local resource management
    • H04W72/20Control channels or signalling for resource management
    • H04W72/23Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal
    • H04W72/231Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal the control data signalling from the layers above the physical layer, e.g. RRC or MAC-CE signalling

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Physics & Mathematics (AREA)
  • Mathematical Physics (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Radio Transmission System (AREA)
BR112020002514-3A 2017-08-11 2018-08-10 técnicas para feixes de potência não zero em sistemas sem fio BR112020002514A2 (pt)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
PCT/CN2017/097206 WO2019028878A1 (en) 2017-08-11 2017-08-11 TECHNIQUES FOR NON-NULL POWER BEAMS IN WIRELESS SYSTEMS
CNPCT/CN2017/097206 2017-08-11
PCT/CN2018/099880 WO2019029675A1 (en) 2017-08-11 2018-08-10 TECHNIQUES FOR NON-NULL POWER BEAMS IN WIRELESS SYSTEMS

Publications (1)

Publication Number Publication Date
BR112020002514A2 true BR112020002514A2 (pt) 2020-08-04

Family

ID=65270979

Family Applications (1)

Application Number Title Priority Date Filing Date
BR112020002514-3A BR112020002514A2 (pt) 2017-08-11 2018-08-10 técnicas para feixes de potência não zero em sistemas sem fio

Country Status (8)

Country Link
US (1) US11432176B2 (https=)
EP (1) EP3665930A4 (https=)
JP (1) JP7239555B2 (https=)
KR (1) KR102766680B1 (https=)
CN (1) CN110999368B (https=)
BR (1) BR112020002514A2 (https=)
SG (1) SG11202000151XA (https=)
WO (2) WO2019028878A1 (https=)

Families Citing this family (35)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2019066451A1 (ko) * 2017-09-27 2019-04-04 엘지전자 주식회사 레인지 추정을 위한 리포팅을 전송 및 수신하는 방법과 이를 위한 통신 장치
CN110945799B (zh) * 2017-09-29 2023-11-28 Lg电子株式会社 用于在无线通信系统中报告信道状态信息的方法及其装置
CN115225125A (zh) * 2018-10-27 2022-10-21 华为技术有限公司 指示和确定预编码向量的方法以及通信装置
US11128354B2 (en) * 2019-01-18 2021-09-21 Samsung Electronics Co., Ltd. Method and apparatus to enable segmented CSI reporting in wireless communication systems
CN113574809B (zh) * 2019-03-28 2024-01-02 联想(新加坡)私人有限公司 用于生成信道状态信息报告的方法和装置
JP7326464B2 (ja) * 2019-04-08 2023-08-15 ノキア テクノロジーズ オサケユイチア 通信効率の向上
US10819434B1 (en) * 2019-04-10 2020-10-27 At&T Intellectual Property I, L.P. Hybrid fiber coaxial fed 5G small cell surveillance with hybrid fiber coaxial hosted mobile edge computing
US10848988B1 (en) 2019-05-24 2020-11-24 At&T Intellectual Property I, L.P. Dynamic cloudlet fog node deployment architecture
CN113875165B (zh) 2019-06-24 2023-12-26 以伊索电子股份有限公司名义经营的阿维科斯天线股份有限公司 使用天线阵列的波束成形和波束转向
US12362849B2 (en) * 2019-10-08 2025-07-15 Nokia Technologies Oy Apparatus, method, and computer program
CN114946133B (zh) * 2020-01-14 2025-09-30 上海诺基亚贝尔股份有限公司 通信的方法、设备和计算机可读介质
US12531626B2 (en) * 2020-01-27 2026-01-20 Qualcomm Incorporated Asymmetric uplink-downlink beam training in frequency bands
US12401403B2 (en) 2020-01-27 2025-08-26 Qualcomm Incorporated Antenna group-specific parameter configuration in millimeter wave communications
US12407385B2 (en) 2020-01-27 2025-09-02 Qualcomm Incorporated Signaling of beam correlation across millimeter wave frequency bands
WO2021154655A1 (en) * 2020-01-27 2021-08-05 Qualcomm Incorporated Antenna group selection and indication in frequency bands
US12374787B2 (en) 2020-02-11 2025-07-29 Qualcomm Incorporated Adjusting communications operations for changes to configurations for quasi co-location and number of antenna elements
JP2023515467A (ja) * 2020-02-20 2023-04-13 株式会社Nttドコモ タイプi/iiチャネル状態情報(csi)用のsrsアシストサブバンド設定の方法
WO2021176334A1 (en) * 2020-03-06 2021-09-10 Lenovo (Singapore) Pte. Ltd. Channel state information report coefficients
CN111901822A (zh) * 2020-04-10 2020-11-06 中兴通讯股份有限公司 测量方法、装置、节点和存储介质
US12301496B2 (en) 2020-07-16 2025-05-13 Qualcomm Incorporated Uplink composite beam synthesis
CN113966000B (zh) * 2020-07-20 2025-04-04 华为技术有限公司 用于波束训练的方法和装置
US11991532B2 (en) 2020-07-27 2024-05-21 Qualcomm Incorporated Techniques for modifying values transmitted in a measurement report for beam management
JP2023543164A (ja) * 2020-09-15 2023-10-13 株式会社Nttドコモ タイプiiポート選択コードブック用の角度遅延領域におけるcsi-rsビームフォーミングの方法
CN116458081A (zh) * 2020-11-20 2023-07-18 华为技术有限公司 Mimo系统中用于信道状态信息反馈的波束集
WO2022118293A1 (en) * 2020-12-04 2022-06-09 Lenovo (Singapore) Pte. Ltd. Configuring a polarization type
CN115118316B (zh) * 2021-03-19 2024-04-26 北京紫光展锐通信技术有限公司 类型ⅱ端口选择码本的反馈、确定方法及装置、计算机可读存储介质
CN115190498B (zh) * 2021-04-02 2024-04-26 大唐移动通信设备有限公司 增强的csi-rs传输、发送反馈信息的方法、装置、设备及介质
CN117178495A (zh) * 2021-05-10 2023-12-05 苹果公司 端口选择码本增强
CN117356128A (zh) * 2021-05-31 2024-01-05 株式会社Ntt都科摩 终端、无线通信方法以及基站
US20230103220A1 (en) * 2021-09-24 2023-03-30 Qualcomm Incorporated Channel state information feedback based on full channel estimation
JP7764622B2 (ja) * 2022-01-13 2025-11-05 北京小米移動軟件有限公司 Csiレポートの送信方法、受信方法、装置、デバイスおよび媒体
US20230397029A1 (en) * 2022-06-03 2023-12-07 Qualcomm Incorporated Beam report enhancements for beam prediction
US12490196B2 (en) * 2022-08-12 2025-12-02 Qualcomm Incorporated Antenna grouping for power management in wireless communications
US20250070830A1 (en) * 2023-08-22 2025-02-27 Qualcomm Incorporated Shortened time domain precoding filters for multi-antenna precoding
WO2025117782A1 (en) * 2023-12-01 2025-06-05 Apple Inc. Per-layer power feedback for enhanced mimo operation

Family Cites Families (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8385441B2 (en) * 2009-01-06 2013-02-26 Marvell World Trade Ltd. Efficient MIMO transmission schemes
US9083501B2 (en) * 2010-04-05 2015-07-14 Qualcomm Incorporated Feedback of control information for multiple carriers
CN103391124B (zh) * 2012-05-10 2018-06-19 中兴通讯股份有限公司 信道状态信息的配置方法、反馈方法、基站和终端
WO2014052926A1 (en) * 2012-09-27 2014-04-03 Huawei Technologies, Co., Ltd. Communications system for configuring channel state information
CN103931226B (zh) * 2012-10-15 2017-11-28 华为技术有限公司 配置信道状态信息参考信号的方法、基站及接入点
US9838184B2 (en) * 2013-04-08 2017-12-05 Lg Electronics Inc. Method and apparatus for reporting channel state information for fractional beamforming in a wireless communication system
AU2015328743B2 (en) 2014-10-10 2018-01-04 Telefonaktiebolaget Lm Ericsson (Publ) Method for dynamic CSI feedback
US10164747B2 (en) 2015-05-29 2018-12-25 Samsung Electronics Co., Ltd. Method and apparatus for operating MIMO measurement reference signals and feedback
US10306597B2 (en) * 2015-07-21 2019-05-28 Samsung Electronics Co., Ltd. Method and apparatus for beam-level radio resource management and mobility in cellular network
US10211964B2 (en) 2015-07-29 2019-02-19 Samsung Electronics Co., Ltd. Method and apparatus for CSI reporting
US10110290B2 (en) * 2015-08-13 2018-10-23 Electronics And Telecommunications Research Institute Terminal for periodically transmitting CSI feedback information
CN106470078B (zh) 2015-08-19 2019-04-26 中国移动通信集团公司 一种信道状态信息测量和反馈的方法、设备及系统
WO2017078785A1 (en) * 2015-11-05 2017-05-11 Intel Corporation Full dimension multiple input multiple output communication systems and methods
WO2017075803A1 (en) * 2015-11-06 2017-05-11 Qualcomm Incorporated Csi feedback processing and reporting for eb/fd-mimo
US10716020B2 (en) * 2016-02-23 2020-07-14 Samsung Electronics Co., Ltd. Method and apparatus for measurement reference signal
CN108462552B (zh) * 2017-02-17 2022-04-12 华为技术有限公司 一种多码字传输方法及装置
CN110574412B (zh) * 2017-05-04 2023-10-24 瑞典爱立信有限公司 用于处理在无线通信网络中的通信的无线装置、无线电网络节点及在其中执行的方法

Also Published As

Publication number Publication date
JP7239555B2 (ja) 2023-03-14
CN110999368A (zh) 2020-04-10
US20200367083A1 (en) 2020-11-19
WO2019029675A9 (en) 2019-09-12
WO2019029675A1 (en) 2019-02-14
CN110999368B (zh) 2023-07-14
US11432176B2 (en) 2022-08-30
EP3665930A4 (en) 2021-05-05
EP3665930A1 (en) 2020-06-17
SG11202000151XA (en) 2020-02-27
KR102766680B1 (ko) 2025-02-11
WO2019028878A1 (en) 2019-02-14
JP2020529789A (ja) 2020-10-08
KR20200038935A (ko) 2020-04-14

Similar Documents

Publication Publication Date Title
BR112020002514A2 (pt) técnicas para feixes de potência não zero em sistemas sem fio
CN114868340B (zh) 毫米波和亚太赫兹频带中的较高秩多输入多输出增强
US20230040058A1 (en) Channel state information feedback for multiple transmission reception points
CN110612694B (zh) 用于mimo通信的预编码器资源组分配方法
BR112020002508A2 (pt) processo escalonável para indicar a seleção de feixe
BR112020005158A2 (pt) transmissão de comandos de comutação de feixe através de sinalização de canal de controle
US12289632B2 (en) Reciprocity-based beamforming for architecture-aware user equipment
WO2021034617A1 (en) Iterative multi-beam selection with uplink-downlink beam training
WO2022032424A1 (en) Procedures for port-selection codebook with frequency selective precoded reference signals
US12476759B2 (en) Sounding reference signal (SRS) resource indicator (SRI) association for configured-grant (CG)-based transmission and reception point (TRP) physical uplink shared channel (PUSCH) transmission
KR20220090509A (ko) 의사 코-로케이션 정보를 공유하는 다수의 컴포넌트 캐리어들 또는 주파수 대역들의 보고
WO2022183469A1 (en) Multi-mode precoding matrix information report for orbital angular momentum based communication system
JP2024502703A (ja) チャネル状態情報の半永続的報告
US20260052420A1 (en) Channel state information reporting for multiple transmission-reception points
US12375159B2 (en) Measurement reporting for multi-port receive beams
WO2022035541A1 (en) Techniques for sub-band precoding in sidelink communications
WO2022088126A1 (en) Information transmission by mode selection and detection in orbital angular momentum multiplexing communications
WO2021247903A1 (en) Wideband and subband precoder selection
US20250089063A1 (en) Updating transmission configuration indicator states for periodic communications
WO2024239179A1 (en) Non-coherent codebook subset selection
WO2025042548A1 (en) Shortened time domain precoding filters for multi-antenna precoding
KR20240144156A (ko) 암호화 키 생성 및 검증 기법
HK40025448A (en) Methods,apparatuses and computer readable medium for wireless communications

Legal Events

Date Code Title Description
B350 Update of information on the portal [chapter 15.35 patent gazette]
B06W Patent application suspended after preliminary examination (for patents with searches from other patent authorities) chapter 6.23 patent gazette]