Implementation method of low power consumption internet of things based on proxy apparatus

    公开(公告)号:US11265814B2

    公开(公告)日:2022-03-01

    申请号:US15577523

    申请日:2015-07-08

    发明人: Hao Lin Rui Zhan

    摘要: A method for implementing a low power consumption IoT network based on a Wi-Fi proxy device. The network is used for low power consumption data exchange between a Wi-Fi IoT device having a long data period in a Wi-Fi IoT network and an internet server, via a Wi-Fi proxy IoT device and a Wi-Fi access point. A low power consumption Wi-Fi MAC layer link is provided between the proxy device and at least one Wi-Fi IoT device. The Wi-Fi IoT device only establishes a low power consumption Wi-Fi MAC layer link with the proxy device. The proxy device connects to the internet server via a Wi-Fi access point, and acts as a data receiving end to buffer data, from the internet server, that is sent to the Wi-Fi IoT device via the Wi-Fi MAC layer link.

    Fingerprint identification authority control-based internet of things control switch and method

    公开(公告)号:US11202202B2

    公开(公告)日:2021-12-14

    申请号:US16469409

    申请日:2018-03-09

    摘要: The present invention relates to an IoT control switch and method based on fingerprint identification permission control, comprising performing user identity and permission verification through fingerprint identification, implementing a MAC layer connectionless communication mechanism between a wire-free fingerprint Wi-Fi IoT switch and a standard Wi-Fi IoT device, and carrying control information for controlling the Wi-Fi IoT device by a privately defined control information element in a unicast packet or broadcast packet without requiring a MAC layer connection; the invention requires little modification, is cost effective to implement, and the data type, manner of acknowledgement, manner of encryption, and different fingerprint security control modes may be freely combined with each other, thereby providing wide applicability. The wire-free fingerprint Wi-Fi IoT switch may complete the translation of control information to the standard Wi-Fi IoT device by sending least number of packets, so as to realize low power consumption control. The wire-free fingerprint Wi-Fi IoT switch may also connect to an internet server via a Wi-Fi access point to perform update and upgrade of firmware, fingerprint feature information list, etc.

    MIMO-OFDM wireless signal detection method and system capable of channel matrix pre-processing before detection

    公开(公告)号:US11791880B2

    公开(公告)日:2023-10-17

    申请号:US17434888

    申请日:2019-12-03

    发明人: Rui Zhan Lu Kong

    摘要: A signal detection method for a MIMO-OFDM wireless communication system includes obtaining a channel matrix of each subcarrier through channel estimation for each MIMO-OFDM data packet in a plurality of MIMO-OFDM data packets; receiving a reception vector of each subcarrier; performing channel matrix preprocessing for the channel matrix of each subcarrier to generate a global dynamic K-value table, in which the global dynamic K-value table includes a global dynamic K-value corresponding to each search layer of each subcarrier; performing MIMO detection for each OFDM symbol in the MIMO-OFDM data packet, in which the MIMO detection includes performing the following steps for each subcarrier of a current OFDM symbol: reading channel matrix preprocessing results and reception vector of the current subcarrier; transforming the reception vector of the current subcarrier into an LR search domain; and performing K-best search for the current subcarrier to obtain an LR domain candidate transmission vector of the current subcarrier, in which a K-value applied to each search layer of the current subcarrier during the K-best search is a global dynamic K-value in the global dynamic K-value table corresponding to the search layer.

    POSITIONING METHOD AND SYSTEM BASED ON WI-FI INTERNET OF THINGS DEVICE NETWORK

    公开(公告)号:US20210282112A1

    公开(公告)日:2021-09-09

    申请号:US16489877

    申请日:2018-04-24

    发明人: Rui Zhan

    摘要: The present invention relates to a positioning method and system based on a Wi-Fi IoT device network, wherein positioning monitoring nodes in a subnet respectively receives, within an information receiving and transmitting range thereof, a data packet sent by a same positioning target device, records corresponding data packet receipt clock information, and provides the data packet receipt clock information and identification information of the positioning target device to the subnet master node; the subnet master node utilizes signal arrival time differences between a plurality of positioning monitoring nodes receiving the data packet from the same positioning target device, and mutual physical distances between the positioning monitoring nodes, to compute the distance differences of the positioning target device with respect to the plurality of positioning monitoring nodes, and determine a position of the positioning target device in a physical coverage range of the subnet. The present invention may achieve the real-time positioning and monitoring of a large number of targets in a large physical range.

    Positioning method and system based on Wi-Fi internet of things device network

    公开(公告)号:US11310761B2

    公开(公告)日:2022-04-19

    申请号:US16489877

    申请日:2018-04-24

    发明人: Rui Zhan

    摘要: The present invention relates to a positioning method and system based on a Wi-Fi IoT device network, wherein positioning monitoring nodes in a subnet respectively receives, within an information receiving and transmitting range thereof, a data packet sent by a same positioning target device, records corresponding data packet receipt clock information, and provides the data packet receipt clock information and identification information of the positioning target device to the subnet master node; the subnet master node utilizes signal arrival time differences between a plurality of positioning monitoring nodes receiving the data packet from the same positioning target device, and mutual physical distances between the positioning monitoring nodes, to compute the distance differences of the positioning target device with respect to the plurality of positioning monitoring nodes, and determine a position of the positioning target device in a physical coverage range of the subnet. The present invention may achieve the real-time positioning and monitoring of a large number of targets in a large physical range.

    Unidirectional bit error correcting method for OTP ROM

    公开(公告)号:US10817368B2

    公开(公告)日:2020-10-27

    申请号:US16311419

    申请日:2016-08-18

    发明人: Hao Lin Rui Zhan

    摘要: The present invention discloses a unidirectional bit error correction method for a OTP ROM, comprising: applying error correction encoding to bit information and writing the bit information to the OTP ROM; during power-up initialization, converting hard bit information read out from the OTP ROM to soft bit information; during the power-up initialization, performing error correction decoding through a soft bit decoder. The advantages of the present invention include: utilizing otherwise temporarily idle decoding modules in the chip, without requiring additional hardware resource, while providing stronger error correction capability to the OTP ROM, improving the stability of chip applications, prolonging chip service life, and significantly reducing rejection rate in chip production.

    Self-adaptive MIMO detection method and system

    公开(公告)号:US11711155B2

    公开(公告)日:2023-07-25

    申请号:US17612812

    申请日:2020-02-26

    发明人: Rui Zhan

    摘要: The present disclosure discloses an adaptive MIMO detection method and system. The method includes the following steps: a) determining whether a Signal to Noise Ratio of a data packet is greater than a set threshold for Signal to Noise Ratio, and if yes, performing ZF preprocessing on the channel matrix, and if not, performing MMSE preprocessing on the channel matrix; b) performing sorted QR decomposition on the channel matrix processed in step a) to obtain a plurality of decomposition matrices; c) determining whether a condition number of the channel matrix of the data packet is greater than a set threshold for condition number of the channel, and if yes, Lattice Reduction is performed on the decomposition matrices obtained in step b); d) determining whether an estimated value of an interference term of the channel matrix is greater than a threshold for the estimated value of the interference term of the channel matrix, and if yes, SIC detection mode is selected for MIMO detection on the data packets, and if not, K-best detection mode is selected for MIMO detection on the data packets; and e) according to processing results from steps a) to d), performing MIMO detection on the data packet.

    MIMO-OFDM wireless signal detection method and system capable of channel matrix pre-processing during detection

    公开(公告)号:US11509516B2

    公开(公告)日:2022-11-22

    申请号:US17434899

    申请日:2019-12-03

    发明人: Rui Zhan Lu Kong

    摘要: A signal detection method for a MIMO-OFDM wireless communication system includes obtaining a channel matrix of each subcarrier for each MIMO-OFDM data packet; receiving a reception vector of each subcarrier; performing MIMO detection for a first OFDM symbol and channel matrix preprocessing to generate a global dynamic K-value table; performing MIMO detection for each subsequent OFDM symbol, the MIMO detection includes: performing the following steps for each subcarrier of a current OFDM symbol: transforming the reception vector of the current subcarrier into a LR search domain; and obtaining a LR domain candidate transmission vector of the current subcarrier, a K-value applied to each search layer of the current subcarrier during the K-best search is a global dynamic K-value in the global dynamic K-value table corresponding to the search layer.