Wireless multi-hop network transmission method for effectively compressing transmission signal frequency band

Abstract

The invention provides a wireless multi-hop network transmission method for effectively compressing a transmission signal frequency band. According to the method, N nodes are set in networking, when the first node measures a signal d1, M random variables perform weighting on the signal d1 to obtain the random weighted value of the first node, then the random weighted value is transmitted to the second node, the second node measures a signal d2 and performs weighting operation with the different M random variables, so that the random weighted value of the second node is obtained, a value which is obtained through adding the random weighted value of the second node to the received random weighted value of the first node is transmitted to the next node, random weighted values of measurement values of the N nodes are accumulated on the Nth node and transmitted to a sink end, and a signal reconstruction method is adopted for performing signal reconstruction at the sink end. The wireless multi-hop network transmission method has the advantages that the frequency band is compressed through signal weighting, the problem that after the hop count exceeds the number of hops, the throughput capacity is lowered is solved, and it is avoided that the bandwidth occupied by a base station wireless return link close to the root node approaches to or exceeds the maximum channel threshold.

Description

technical field [0001] The invention relates to the technical field of network coding methods, in particular to a wireless multi-hop network transmission method for effectively compressing transmission signal frequency bands. Background technique [0002] With the popularization of wireless multi-hop communication network, its scale and complexity continue to develop, and multi-hop communication network encounters more and more problems, such as bandwidth reduction, wireless interference and network delay. With one hop, its throughput will drop by as much as 50%. In the existing multi-hop networking technology, when the hops of the base station wireless relay exceed 2-3 hops, the throughput drops more rapidly, and the signal quality deteriorates. Deterioration is severe and network performance can be severely degraded. One of the reasons for this problem is that each node in the multi-hop network provides user access and data backhaul at the same time, and its backhaul link...

AI Technical Summary

Problems solved by technology

[0002] With the popularization of wireless multi-hop communication network, its scale and complexity continue to develop, and multi-hop communication network encounters more and more problems, such as bandwidth reduction, wireless interference and network delay. With one hop, its throughput will drop by as much as 50%. In the existing multi-hop networking technology, when the hops of the base station wireless relay exceed 2-3 hops, the throughput drops more rapidly, and the signal quality deteriorates. Deterioration is severe and network performance can be severely degraded

One of the reasons for this problem is that each node in the multi-hop network provides user access and data backhaul at the same time, and its backhaul link decreases as the number of hops increases. See the attached figure 1 shown, according to the attached figure 1 It can be seen that the bandwidth occupied by the wireless backhaul link of the base station closer to the root node approaches or exceeds the maximum channel bandwidth threshold, resulting in the failure of the base station access signal of the remote node to be transmitted to the switching center in a timely manner, especially for video signal transmission. It is far from meeting the requirements of timely transmission, which is also the most important bottleneck that prevents all kinds of wireless multi-hop networking technologies from being truly applied to various fields.

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