Frequency hopping point generation method and frequency hopping communication method

Abstract

The invention provides a frequency hopping point generation method. When frequency point communication is generated through utilization of the method, the communication security and interference resistance can be effectively improved. The frequency hopping point generation method comprises the following steps of selecting a plurality of different frequency points and ordering the frequency pointsto obtain a frequency point list T, serially numbering the frequency points according to an ordering sequence, wherein the numbering is started from 0 and is carried out according to an ascending order; selecting a group of prime numbers; and multiplying a serial number i by a prime number p, dividing the frequency point total number by a product, acquiring a remainder, and taking the frequency point of which serial number is the remainder in the frequency point list T as the frequency point of which serial number is the i in a new frequency point list L.

Description

technical field [0001] The invention relates to a frequency hopping frequency point generation method and a frequency hopping communication method, which are mainly used in the field of electric power information collection. Background technique [0002] At present, the LoRa module mostly adopts communication methods such as fixed frequency and slow hop, but there are some problems, such as data security, susceptibility to interference, low frequency utilization, multipath effects, etc., and some places have Relevant laws stipulate that the time occupied in a certain channel cannot exceed the maximum allowable channel dwell time. [0003] Micro-power wireless modules are now mostly used in wireless fixed-frequency communication methods, that is, two modules receive and send data through fixed frequency points. Some applications of micro-power wireless modules use the slow-hop communication method, that is, the module will first send data at a certain frequency point, and if...

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Problems solved by technology

However, this method is limited by the length of the preamble, and the number of available frequency points is limited, not too many

Moreover, the security of this method is relatively low, because a frame of data is still sent and received at a frequency point, so the data frame is relatively easy to be parsed, and when the length of the data frame is too long, the time occupied by a certain channel May exceed the maximum channel dwell time allowed by relevant regulations

[0004] The disadvantages of the above-mentioned prior art are: 1. The data sending and receiving method of the fixed frequency point of the wireless communication module is to send and receive data at one frequency point. The sending and receiving data under this communication method is relatively easy to be obtained by people through the module. The content of the frame is then parsed, data security and confidentiality are not good enough

2. If the length of a frame of data is relatively long, the time occupied in a certain channel may exceed the maximum channel residence time allowed by some countries

3. The anti-interference performance of this fixed-frequency communication method is much worse than that of the frequency-hopping communication method

4. The utilization rate of the available frequency band is also relatively poor, because only a certain fixed frequency point is used in communication such as fixed frequency and slow hopping, while frequency hopping communication uses multi-frequency point switching to send and receive data

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