Communication method based on frequency division and time division in positioning system

Abstract

The invention relates to a communication method based on frequency division and time division in a positioning system. The communication method comprises the steps as follows: 1, at least two channelsare set in a positioning base station; 2, a positioner randomly selects one channel; 3, the positioner receives a synchronous head broadcasted by a positioning base station, and judges whether a timeslot in an idle state exists according to an indicator in the synchronous head; and the step 5 is executed, if a judgment result is no; 4, the positioner randomly selects one idle time slot to send an access request to the positioning base station, after receiving the access request, the positioning base station judges whether the request accords with the actual situation; and the step 3 is executed, if the request is not accordant with the actual situation; a network access warrant is sent to the positioner in the corresponding time slot, after receiving the network access warrant, the positioner completes access work, and occupies the corresponding time slot to send positioning data to the positioning base station, and the process ends; and 5, the positioner reselects one channel whichis different from the current channel, and the step 3 is executed. According to the method provided by the invention, the data size of communication of the positioning base station is increased, and the utilization rate of the positioning base station and the data transmission rate of the positioner are improved.

Description

(1) Technical field: [0001] The invention relates to a communication method in a positioning system, in particular to a communication method based on frequency division and time division in the positioning system. (two), background technology: [0002] In the field of positioning, the existing positioning technology and equipment can be divided into two types from the perspective of the positioning area: one is outdoor positioning technology, such as GPS positioning technology, Beidou positioning technology, etc., which can only achieve the goal (such as the person being positioned) Positioning in an outdoor and unobstructed environment has great limitations and cannot accurately locate the target; the other is indoor positioning technology, such as Bluetooth positioning technology, ZigBee positioning technology, UWB positioning technology, etc. Positioning in an occluded environment, but its positioning distance is relatively short. In actual management work, regardless of...

AI Technical Summary

Problems solved by technology

Time Division Multiple Access (TDMA) is a communication technology for sharing transmission media (usually in the radio field) or network, allowing multiple users to use the same frequency in different time slices (time slots), and time It is divided into periodic frames, and each frame is divided into several time slots to send signals to the base station. Under the condition of timing and synchronization, the base station can receive the signals of each mobile terminal in each time slot without confusion. However, the number of terminals that the base station can accommodate is limited. When the number of terminals increases, its communication speed will be affected

Images