A method and device for preventing multi-user terminal access conflicts

Abstract

The invention discloses a method and device for preventing access collision of multiple user terminals. The method comprises the following steps: a specific user ID is allocated for each user terminal working in a time division mode in advance; when multiple user terminals working in a time division mode are activated at the same time and access a network, each user terminal determines a corresponding network access time slot according to the allocated user ID so that the user terminals activated at the same time forms an access queue for accessing the network; and each user terminal in the access queue accesses the network in sequence according to the determined time slot and sends data frames. The method has the advantages of largely reducing access collision and improving the use rate of channels when multiple user terminals are activated at the same time and need network access.

Description

technical field [0001] The invention relates to the field of micro-power Internet of Things, in particular to a method and device for preventing multi-user terminal access conflicts. Background technique [0002] The modern world is a world of high-speed automation. In addition to being connected to computers, various devices can also be connected to each other. The easiest way to connect to automation is to use serial communication. Today, compared with wired technology, wireless technology has the advantages of low cost, easy portability, and no need for wiring. It is widely used in various devices and systems, such as handheld devices, battery-powered devices, industrial data acquisition systems, wireless remote control systems, intelligent communities Non-parking charging system, etc. The quality of the wireless communication protocol is directly related to the security of the system, the bit error rate and the speed of the system operation. Therefore, in various wirele...

AI Technical Summary

Problems solved by technology

The time-slotted ALOHA protocol makes the probability of collisions greatly reduced, but for the wireless tag identification system, since the number of remote stations is as large as dozens, hundreds or even thousands, the trigger conditions are the same (that is, there are data needs at the same time) Communication), all tag data needs to be processed within a limited time (for example, within a few seconds). From Table 1 and Table 2, it can be seen that the pure ALOHA protocol and the slotted ALOHA protocol cannot effectively reduce the number of remote stations sending data almost simultaneously. resulting conflict

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