65 results about "NarrowBand IOT" patented technology

This specification discloses a method for transmitting a demodulation reference signal (DMRS) in a wireless communication system supporting NB (Narrow-Band)-IoT (Internet of Things), the method performed by a User Equipment (UE) including generating a reference signal sequence used for demodulation; mapping the reference signal sequence to at least one symbol; and transmitting the demodulation reference signal (DMRS) to a base station through a single subcarrier in the at least one symbol.

The invention discloses an OTA test system and method for NB-IoT equipment, wherein the system comprises: a darkroom; a rotating platform arranged in the darkroom and used for placing to-be-tested equipment which is narrowband IoT (Internet of Things) equipment based on a cellular network; an annular antenna support frame which is vertically arranged in the darkroom and on which a plurality of antennas are distributed; a control terminal; and a comprehensive test instrument which is connected with the to-be-tested equipment and the control terminal and is used for measuring transmitting performance and receiving performance of the to-be-tested equipment under control of the control terminal. The OTA test system and method provided by the invention solve a technical problem that the OTA test system for the NB-IoT equipment is absent in the prior art.

The present disclosure provides a method and apparatus for determining a path loss, wherein the method is applied to a user equipment, and the user equipment belongs to a narrowband Internet of Thingsdevice, including: determining a transmit power of a downlink narrowband reference signal NRS; determining a narrowband reference signal received power NRSRP The measured value is determined. The base station and the user are determined according to the transmit power of the downlink narrowband reference signal and the measured value of the received power of the narrowband reference signal, if the preset high-layer filter parameter sent by the base station is not received. Path loss between devices. In the method for determining the path loss provided by the present disclosure, in the processof determining the transmit power of the user equipment, the configuration information transmission burden of the base station can be reduced, unnecessary retransmission can be avoided, and power consumption of the narrowband IoT UE can be reduced.

The invention discloses an intelligent lightning monitoring system based on NB-IOT. The system is characterized in that the operating environment, an operating status and surge core parameters of SPDsat all levels are collected by an SPD monitoring module; occurrence of lightning is predicted by a lightning warning module, and the alarm is uploaded; on and off of a power source of special electrical equipment can be remotely operated by a terminal control module, and old surge protectors with faults can be automatically replaced; data communication between an MCU module and other modules is performed; data is transmitted by an NB-IOT wireless transmission module to a cloud server; the NB-IOT network is created based on an NB-IOT base station; the cloud server is used for realizing data storage, calculation and analysis and control instruction issuing and transmitting the alarm and real-time monitoring data for mobile equipment. The system is advantaged in that the system is an intelligent lightning monitoring system which is based on the NB-IOT narrowband IoT technology and has properties of low power consumption, low cost, wide coverage and long distance, system design is reasonable, the intelligent degree is high, the application scope is wide, and the system is easy for realization.

Provided are a method and an apparatus for allocating a resource of an uplink data channel of the narrowband Internet of things (NB IoT) user equipment to transmit and receive a data using a narrow band. The method may include receiving downlink control information (DCI) including a subcarrier indication field from a base station, configuring a wireless resource of an uplink data channel based on at least one of i) a subcarrier indication field and ii) subcarrier spacing information configured to the NB IoT user equipment, and transmitting an uplink data using a wireless resource of an uplink data channel.

According to some embodiments, a method for use in a frequency-hopping wireless transmitter for transmitting in unlicensed spectrum comprises: obtaining a configuration for a plurality of frequency channels in unlicensed spectrum; and transmitting a data transmission according to a frequency-hopping pattern across the plurality of frequency channels. The configuration for the plurality of frequency channels comprises a first subset of frequency channels for downlink transmission and a second subset of frequency channels for uplink transmission. The frequency channels in the first and second subsets are mutually exclusive. In some embodiments the first and second subset of frequency channels each comprise 160 frequency channels in the 2.4 GHz band, or 50 frequency channels in the 915 MHz band.

Embodiments described herein include user equipment (UE), evolved node B (eNB), methods, and systems for narrowband Internet-of-Things (IoT) communications. Some embodiments particularly relate to control channel communications between UE and eNB in narrowband IoT communications. In one embodiment, a UE blind decodes a first control transmission from an evolved node B (eNB) by processing a first physical resource block comprising all subcarriers of the transmission bandwidth and all orthogonal frequency division multiplexed symbols of a first subframe to determine the first control transmission. In various further embodiments, various resource groupings of resource elements are used as part of the control communications.

The invention provides a method for improving the communication success rate of a NB-IOT single lamp controller and relates to the technical field of a single lamp control system with NB-IOT (narrowband IOT) communication. Due to the narrowband nature of the NB-IOT communication, the requirements of grid connection and line access at the same time when a streetlight is turned on are not satisfied.According to the invention, in the process of the mass sending of communication commands by monitoring platform software, the peak shifting processing such as different batches, different times and hopping is used, and the communication success rate is improved with the combination of a heartbeat response mechanism. When the monitoring platform software performs the mass sending of the communication commands to a single lamp controller of a same road segment, at the same time, a command sequence to be subjected to mass sending is broken into a plurality of sub-sequences of a small number of sizes, the sub-sequences are transmitted in batches, and the limitation of the processing ability of a NB base station is avoided. When the monitoring platform software receives a heartbeat packet of aNB-IOT single-lamp controller, the monitoring platform software actively performs the command issuing operations including condition query, parameter query, parameter modification and lamp switchingcontrol. According to the invention, the communication success rate of the NB-IOT single-lamp controller is greatly improved without increasing the deployment number of NB base stations.

The present invention discloses a method for joint multi-carrier operation of Narrowband Internet-of-Things (NB-IoT) in licensed and unlicensed frequency spectrum. The purpose of the present invention is to provide a method that uses existing multi-carrier operation techniques, but can also handle and use ISM bands (unlicensed bands), thus complying with all regulatory requirements, achieved by Additional uplink and / or downlink NB‑IoT carriers operating to extend the existing NB‑IoT regulatory criteria in the licensed spectrum to enable narrowband IoT (NB‑IoT) in both licensed and unlicensed spectrum IoT) approach for joint multi-carrier operation, where additional data depending on the scheduled media access procedure is added to the configuration data, which is broadcast between the base station and the UE to ensure that the UE and the base station side are on Compliance during operation.

The invention provides a geotechnical monitoring method, device and system based on the NB-IoT narrowband IOT (Internet of Things). Different hardware sampling circuits are selected according to configuration, and the device can collect various types of sensor signals (such as frequency, voltage, current, etc.) at the front end, and calculates measured physical quantities (such as strain stress, displacement, settlement, tilt angle, etc.) through a built-in calibration scale, and can be connected with many types of sensors from multiple manufacturers. The wireless communication uses NB-IoT narrowband Internet network, and the NB-IoT has the advantages of wide coverage, massive connection, lower power consumption, low cost, etc. Each sensor directly communicates with the platform through the device, and there is no need to design a bus circuit, and avoids the trouble and cost of the charging of bus wiring. A lithium battery is employed as a power supply, and the commercial power or a solar cell panel does not need to be connected, thereby reducing the power supply cost, avoiding the damages to the power supply, and avoiding the disadvantages that the power supply is not stable and the cost in power compensation is high. The entire device is small in size.

The present disclosure relates to a control method, device and chip for chip acquisition and positioning, and relates to the field of chips. The method includes receiving a positioning request; decomposing the positioning request into positioning time slices; When the idle interval in the NB-IoT communication is greater than or equal to a preset threshold, the positioning time slice is inserted into the idle interval in the NB-IoT communication to control the GPS data processing module to acquire current positioning information. Such a control method enables the chip to perform both narrowband IoT communication and GPS positioning, realizing that a single chip IoT chip supports both positioning and narrowband IoT communication, and since GPS positioning and narrowband IoT communication will not Simultaneously, this can also enable narrowband IoT communication and GPS positioning to use the same antenna and radio frequency transceiver, which relatively saves hardware costs.

The invention discloses an encrypted communication method and an encrypted communication device based on the narrowband Internet of Things. The communication method includes the following steps: S1. The server performs identity authentication on the terminal node through the narrowband Internet of Things communication module. If the identity authentication is successful, establish Communication connection; if the identity authentication fails, it ends; S2. The server sends the command to generate the secret key table and the secret key seed to the terminal node through the narrowband Internet of Things communication module, and the terminal node generates the same secret key table as the server after receiving the secret key seed ; S3. The terminal node generates a secret key and encrypts the data; S4. The server decrypts the communication content, and then sends it to the user client. The present invention uses the key seed to enable the terminal node and the server to have the same key table, and uses the random number coordinate method to share the key to improve the security of the key, so that the identity between the NB‑IoT terminal and the server can be efficiently Authentication, thereby improving the security of communication.

The embodiment of the present application discloses an access control unlocking method and device based on NB-IoT. The technical solution provided by the embodiment of the present application provides access control QR codes that change over time through wireless access control. The user terminal scans the access control QR code to obtain the target access control information and sends an access control unlock request. After receiving the access control unlock request from the user terminal According to the target access control information and user information carried in the access control unlock request, the access control verification is performed and the corresponding access control verification result is returned to the NB-IoT gateway. The access control QR code that changes over time can reduce the situation that users who take photos and record the access control QR code to remotely unlock the wireless access control, which causes users who do not carry user terminals to pass through the wireless access control, effectively ensuring the security of the wireless access control.

An embodiment of the present application provides a signal-to-noise ratio evaluation method, device, device, and storage medium. The method includes: obtaining the feature value of the terminal point of the narrowband Internet of Things to be tested, and the feature corresponding to the feature value is used to represent the terminal point The characteristic of the narrowband Internet of things at place; Based on the signal-to-noise ratio evaluation model, the signal-to-noise ratio of the terminal point of the narrowband Internet of things to be tested is evaluated, and the signal-to-noise ratio value of the terminal point of the narrowband Internet of things to be measured is obtained, The signal-to-noise ratio evaluation model is obtained by using the least squares deviation model training with the eigenvalue and signal-to-noise ratio of each preset narrowband Internet of Things terminal point among a plurality of preset narrowband Internet of Things terminal points as training samples . The method provided by the embodiment of the present application can solve the problem in the prior art that the network signal-to-noise ratio index cannot be obtained effectively, which in turn leads to high maintenance and optimization costs and low efficiency.