RFID (radio frequency identification) indoor positioning system and method of narrow-band Mesh network

Abstract

The invention discloses an RFID (radio frequency identification) indoor positioning system and method of a narrow-band Mesh network. According to different positions of information processing terminals, a data link scheme of the RFID indoor positioning system includes that in field application, a 470M wireless communication module directly transmits effective tag information and RSSI (received signal strength indicator) field strength and the like read by an RFID reader back to an upper computer for resolving the position information via a serial port; in remote application, the 470M wireless communication module directly transmits the effective tag information and the RSSI field strength and the like read by the RFID reader back to aggregation nodes via the serial port, and transmits the information to the remote information processing terminals at an appointed socket port. The purposes of the present invention of providing the data link scheme which is stable and efficient and convenient to deploy for a distributive RFID reading device in the indoor positioning system, and providing data path guarantee for the information processing terminals at the far end or on site to resolve the position information of the radio-frequency tags in time are achieved.

Description

technical field [0001] The invention relates to the fields of wireless Mesh network, indoor positioning and radio frequency tags, in particular to an RFID indoor positioning system of a narrowband wireless Mesh network. [0002] Technical introduction in related fields: [0003] Wireless Mesh network: Wireless Mesh network (wireless mesh network) is also called "multi-hop" network, it is a new wireless network technology completely different from traditional wireless network, in the traditional wireless local area network (WLAN ), each client accesses the network through a wireless link connected to an AP (Access Point), forming a local Basic Service Set (BSS). If users want to communicate with each other, they must first visit a fixed access point (AP). This network structure is called a single-hop network. In a wireless Mesh network, any wireless device node can act as an AP and a router at the same time, each node in the network can send and receive signals, and each node...

AI Technical Summary

Problems solved by technology

[0026] 1. There is no clear induction and definition of the data path between the RFID reader and the information processing terminal, and most existing solutions do not mention how to deploy the data path

[0027] 2. As far as the hardware interface of most existing RFID readers is concerned, most of them only support universal asynchronous serial bus, such as RS232, RS485, etc., and the price of RFID readers with standard Ethernet interface and WIFI interface is usually close to Ten thousand, high deployment cost

[0028] 3. In the application scenarios of RFID positioning, such as large warehouses, prison buildings, hospitals, computer rooms, etc., multiple RFID readers are distributed in areas with an area of ​​hundreds to thousands of square meters. Label data will be designed for large-scale facility renovation. If WIFI transmission is adopted, the cost will be high and the indoor signal coverage will be poor.

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