CN-121985300-A - RSSI positioning data relay transmission device and method based on 2.4G

CN121985300ACN 121985300 ACN121985300 ACN 121985300ACN-121985300-A

Abstract

The invention discloses a 2.4G-based RSSI positioning data relay transmission device and a method, and belongs to the technical field of wireless communication. The device comprises a positioning tag, a positioning gateway, a relay gateway and a public network gateway. The method comprises the steps of broadcasting a 2.4G signal containing an ID of a positioning tag, scanning the 2.4G signal by the positioning gateway to generate and broadcast a data packet which is packaged with a positioning gateway address, a data packet number, a relay level and aggregated data, switching to a low power consumption mode by the relay gateway after initialization through a interception-learning-synchronization mechanism, waking up and receiving the data only in a broadcasting time window of an upstream gateway, updating the relay level and then forwarding to a downstream gateway, thereby realizing multi-hop relay transmission of the data, and finally uploading the data to a cloud platform or an upper computer by a public network gateway. According to the invention, through data aggregation and time synchronization dormancy, the system power consumption is greatly reduced, and long-distance and long-endurance positioning data transmission powered by a battery in a complex environment is realized.

Inventors

ZHANG YONG
GONG QIANG
HE JIAO
YE HAILIN
PENG TAO
MA JIN
LI JIAN

Assignees

云筑信息科技(成都)有限公司
深圳市誉托科技有限公司

Dates

Publication Date: 20260505
Application Date: 20260408

Claims (10)

1. The utility model provides a RSSI positioning data relay transmission device based on 2.4G which characterized in that includes The positioning tag is used for broadcasting a 2.4G wireless data packet at least comprising unique identification information of the positioning tag; One or more positioning gateways are used for scanning and receiving 2.4G wireless data packets broadcast by positioning tags to acquire RSSI values of the positioning tags, carrying out data aggregation on a plurality of RSSI values from the same positioning tag in a preset aggregation time window to generate aggregation data, and broadcasting data packets packaged with positioning gateway addresses, data packet numbers, relay levels and the aggregation data; One or more relay gateways are used for waking up in a preset interception time window, intercepting and receiving data packets of an upstream gateway, processing the received data packets and forwarding the processed data packets to a downstream gateway in a preset broadcasting time window, wherein the upstream gateway is a positioning gateway or an upstream relay gateway, and the downstream gateway is a next relay gateway or a public gateway; and the public network gateway is used for receiving the data packet forwarded by the last-stage relay gateway and uploading the data in the data packet to the cloud platform or the upper computer through an external network.
2. The 2.4G-based RSSI positioning data relay transmission device according to claim 1 is characterized in that the positioning gateway aggregates the received plurality of RSSI values from the same positioning tag in each aggregation time window into a single representative RSSI value, wherein the representative RSSI value is the value with the largest signal intensity among all the received RSSI values in each preset aggregation time window.
3. The 2.4G-based RSSI positioning data relay transmission device according to claim 1, wherein the operation mode of the relay gateway comprises: the initialization learning stage comprises the steps of entering a full-time scanning mode after power-on, and learning and predicting a data transmission time sequence comprising a plurality of regular data transmission time points of an upstream gateway by monitoring a data packet of the upstream gateway; and the low-power-consumption operation stage is to switch to a low-power-consumption mode after learning is completed, and in the low-power-consumption mode, the trunk gateway is in a dormant state for most of the time, wakes up only at the predicted data transmission time point, and opens a interception time window to receive the data packet of the upstream gateway.
4. A 2.4G-based RSSI positioning data relay transmission device according to claim 3, wherein learning and predicting a data transmission time sequence including a plurality of regular data transmission time points of an upstream gateway specifically comprises: recording the actual receiving time of a plurality of data packets of the upstream gateway which are continuously and successfully received; calculating the time interval of adjacent data packets according to a plurality of actual receiving moments, and determining a data transmission period based on the time interval; When the calculated data transmission period tends to be stable, determining the actual receiving moment of the next successfully received data packet as a transmission starting time reference; Based on the transmission start time reference and the data transmission period, a plurality of equally spaced data transmission time points are calculated to constitute a data transmission time sequence.
5. The 2.4G-based RSSI positioning data relay transmission device according to claim 1, wherein the positioning gateway repeatedly broadcasts the data packet for a plurality of times, and the relay gateway performs de-duplication processing on the received repeated data packet according to the data packet number in the interception process.
6. The 2.4G based RSSI positioning data relay transmission device according to claim 1, wherein the listening time window of the relay gateway is aligned in time with the broadcast time window of the upstream gateway.
7. The 2.4G-based RSSI positioning data relay transmission device according to claim 1 is characterized in that relay gateways are defined as 1 st to N th stages according to a data flow direction sequence, N is an integer greater than or equal to 1, an upstream gateway of the 1 st stage relay gateway is a positioning gateway, a downstream gateway of the N th stage relay gateway is a public gateway, an upstream gateway of the k th stage relay gateway is a k-1 th stage relay gateway, the downstream gateway is a k+1 th stage relay gateway, and k is an integer from 2 to N-1.
8. The 2.4G-based RSSI positioning data relay transmission device according to claim 1, wherein the relay gateway updates the data packet when forwarding the data packet, at least increases the value of the relay level field in the data packet by one to identify the number of times the data packet passes through the relay.
9. The 2.4G-based RSSI positioning data relay transmission device of claim 1, wherein the positioning gateway and the relay gateway each employ a single 2.4G communication chip.
10. A method for locating a data relay transmission device based on RSSI of 2.4G according to any of claims 1-9, comprising the steps of: S1, each positioning gateway scans and receives a 2.4G wireless data packet broadcast by a positioning tag, acquires and aggregates RSSI values of the positioning tags, and broadcasts a first-stage data packet at a first time point; s2, the first-stage relay gateway learns to obtain a data transmission time sequence of each positioning gateway and enters a low-power mode, wakes up and listens at each data transmission time point in the data transmission time sequence in the low-power mode, and broadcasts a second-stage data packet at a second time point after receiving and processing the data packet; S3, the relay gateways at the second and subsequent stages learn the data transmission time sequence of the upstream gateway, enter a low-power consumption mode, wake up and receive upstream data packets at fixed time based on the learned data transmission time sequence, and forward the data packets to the downstream gateway after processing until the data packets are received by the public gateway; S4, the public network gateway uploads the data in the received data packet to the cloud platform or the upper computer through an external network.

Description

RSSI positioning data relay transmission device and method based on 2.4G Technical Field The invention relates to the technical field of wireless communication, in particular to a 2.4G-based RSSI positioning data relay transmission device and method. Background The positioning technology based on RSSI has been widely used, and the basic principle is that a positioning tag periodically broadcasts a wireless signal, a positioning gateway receives the signal and measures the strength (RSSI value) of the signal, and then the distance between the tag and the gateway is estimated through an algorithm. After the positioning gateway obtains the RSSI data, the RSSI data is transmitted to an upper computer or a cloud platform with computing capability to carry out final position calculation. Currently, data transmission is mostly dependent on gateway-mounted wired (e.g. ethernet) or wireless (e.g. WiFi, loRa, 4G/5G) modules. However, in complex environments such as construction sites, underground mines, tunnels and the like, two major challenges are often faced, namely, poor or no coverage of network signals of a telecom operator, difficult wired deployment, inconvenient on-site power taking, and dependence on battery power supply of equipment. The battery-powered limitation precludes the possibility of using high-power communication devices. The wireless communication module with low power consumption has limited signal penetration and diffraction capability and short transmission distance. To achieve long-range transmission, a multi-node cascade relay scheme must be employed. In the prior art, although standard networking protocols such as Zigbee and LoRa exist, a specific chip is generally required, the hardware cost is increased, the general protocols are complex in design and relatively high in power consumption, and long-term endurance is difficult to realize under the scene of power supply by a battery. Therefore, there is an urgent need in the art for a data transmission scheme that is designed specifically for transmitting RSSI data, can implement multi-level concatenation, and has ultra-low power consumption characteristics. Disclosure of Invention The invention aims to overcome the defects of the prior art and provides a 2.4G RSSI positioning data relay transmission device and method which have low power consumption, low cost and multistage cascade connection. The scheme can realize the stable and long-distance transmission of the positioning data in a complex environment which does not depend on the coverage of an external power grid and a public network. In order to achieve the above purpose, the technical scheme adopted by the invention is as follows: A2.4G-based RSSI positioning data relay transmission device comprises The positioning tag is used for broadcasting a 2.4G wireless data packet at least comprising unique identification information of the positioning tag; One or more positioning gateways are used for scanning and receiving 2.4G wireless data packets broadcast by positioning tags to acquire RSSI values of the positioning tags, carrying out data aggregation on a plurality of RSSI values from the same positioning tag in a preset aggregation time window to generate aggregation data, and broadcasting data packets packaged with positioning gateway addresses, data packet numbers, relay levels and the aggregation data; One or more relay gateways are used for waking up in a preset interception time window, intercepting and receiving data packets of an upstream gateway, processing the received data packets and forwarding the processed data packets to a downstream gateway in a preset broadcasting time window, wherein the upstream gateway is a positioning gateway or an upstream relay gateway, and the downstream gateway is a next relay gateway or a public gateway; and the public network gateway is used for receiving the data packet forwarded by the last-stage relay gateway and uploading the data in the data packet to the cloud platform or the upper computer through an external network. Further, the data aggregation mode of the positioning gateway to the RSSI values is that a plurality of received RSSI values from the same positioning tag in each aggregation time window are aggregated into a single representative RSSI value, wherein the representative RSSI value is the value with the largest signal intensity in all the received RSSI values in each preset aggregation time window. Further, the working modes of the relay gateway include: the initialization learning stage comprises the steps of entering a full-time scanning mode after power-on, and learning and predicting a data transmission time sequence comprising a plurality of regular data transmission time points of an upstream gateway by monitoring a data packet of the upstream gateway; and the low-power-consumption operation stage is to switch to a low-power-consumption mode after learning is completed, and in the low-power-consumption mode, the trunk