Low-delay multi-node real-time wireless network transmission method based on radio frequency forwarding

Abstract

The invention discloses a low-delay multi-node real-time wireless network transmission method based on radio frequency forwarding, which comprises the following steps of: firstly, dividing a transmitting terminal node into regions, configuring a radio frequency forwarding relay for each region, then respectively determining transmitting frequency bands of a transmitting terminal and the radio frequency forwarding relays; configuring the transmitting frequency points for each node and each area in a frequency division multiplexing mode; and then performing real-time signal transmission by using a three-stage transmission network consisting of the transmitting terminal, the radio frequency forwarding relay and the multi-channel parallel receiving base station. According to the real-time wireless network transmission method disclosed by the invention, real-time wireless transmission of multi-node data can be realized under the condition of approaching zero delay, the signal transmission performance is ensured, the network hardware overhead is reduced, thereby achieving the practicability.

Description

technical field [0001] The invention belongs to the field of wireless communication networks, in particular to a low-delay multi-node real-time wireless network transmission method based on radio frequency forwarding. Background technique [0002] The current mainstream multi-node wireless transmission network mainly includes 4G / 5G wireless mobile communication, WIFI wireless local area network and ZigBee wireless transmission network. These wireless transmission networks are capable of wireless transmission of large amounts of data, and are widely used in industrial wireless measurement field. However, the above-mentioned network is not suitable for scenarios that require high real-time data transmission, especially some applications that require data transmission delay less than 1ms. The specific reasons are as follows: [0003] The uplink of the 4G / 5G wireless mobile transmission network adopts time-division multiplexing. The minimum time slot for a single user is 0.5ms....

AI Technical Summary

Problems solved by technology

[0003] The uplink of the 4G / 5G wireless mobile transmission network adopts time-division multiplexing. The minimum time slot for a single user is 0.5ms. Multi-users mainly realize multi-node data transmission through time slot allocation. The transmission delay of this wireless network Related to the number of users, when the number of users is large, the transmission delay is generally tens of milliseconds, and limited by the minimum slot and limited bandwidth, it is difficult for 4G / 5G wireless mobile communication networks to realize real-time wireless transmission of large-capacity data

The network mainly adopts a combination of time division and frequency division, but the wireless network has fewer configurable frequency points, and there is overlap between frequency bands, and multi-node data transmission still mainly relies on time division multiplexing, which is scheduled through network protocols , the wireless network transmission delay is significantly affected by the number of nodes. When the number of nodes reaches more than 10, the transmission delay reaches several milliseconds, and the delay of different nodes fluctuates greatly.

[0005] On the whole, the current mainstream network transmission method is mainly based on time division multiplexing, supplemented by frequency division multiplexing. The transmission delay of the wireless link is largely dependent on the time slot scheduling algorithm, resulting in a large network transmission delay. Moreover, as the number of transmission nodes increases, the network delay increases linearly. For a transmission network with dozens of nodes, the existing wireless transmission network cannot meet the strong real-time requirement that the network transmission delay is less than 1ms

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