A low-latency multi-node real-time wireless network transmission method based on radio frequency forwarding

Abstract

The invention discloses a low-latency multi-node real-time wireless network transmission method based on radio frequency forwarding. The method first divides transmitting terminal nodes into areas, configures radio frequency forwarding relays for each area, and then determines the transmitting terminal and radio frequency In the next transmission frequency band, the frequency division multiplexing method is used to configure the transmission frequency point for each node and each area, and then the three-level transmission network composed of the transmitting terminal, the radio frequency forwarding relay and the multi-channel parallel receiving base station is used for real-time signal transmission. The real-time wireless network transmission method disclosed by the invention can realize the real-time wireless transmission of multi-node data under nearly zero delay, and reduces the network hardware overhead while ensuring the signal transmission performance, and has practicability.

Description

technical field [0001] The invention belongs to the field of wireless communication networks, in particular to a low-latency multi-node real-time wireless network transmission method based on radio frequency forwarding. Background technique [0002] At present, the mainstream multi-node wireless transmission networks mainly include 4G / 5G wireless mobile communication, WIFI wireless local area network and ZigBee wireless transmission network. These wireless transmission networks have wireless transmission capabilities of large amounts of data and are widely used in industrial wireless measurement. field. However, the above networks are 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 4G / 5G wireless mobile transmission network adopts time division multiplexing method. The minimum time slot of a single user is 0.5...

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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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