A low-power wireless link quality estimation method under cross-protocol interference
A technology of wireless link quality and link quality, applied in the field of low-power wireless communication, can solve the problems of high communication and calculation overhead, few estimation methods, etc.
Active Publication Date: 2020-06-23
南京感深科技有限公司
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Problems solved by technology
[0004] There are currently few methods for estimating link quality in a CTI environment
At the same time, the more accurate link quality estimation methods that fully consider the impact of CTI are basically centralized, requiring statistics on a large number of network data packets, which will result in very high communication and computing overhead
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[0058] The technical solutions of the present invention will be further described below in conjunction with the accompanying drawings and embodiments.
[0059] Such as figure 1 and figure 2 As shown, the method for estimating the quality of a low-power wireless link under cross-protocol interference according to the present invention comprises steps:
[0060] The first stage: the model update stage; periodically update the model, scan the current channel, and obtain channel noise statistics, which are used to update the parameters required for the link quality estimation model.
[0061] Step 1. The statistical time window length is t 1 noise samples within , the update interval is t 2 ;Noise sampling frequency f n Set according to the actual situation to ensure that the number of samples t 1 x f n Sufficient for model updates.
[0062] Step 2. Obtain the time window t based on the noise sample statistics obtained in step 1 1 internal noise N dBm and the cumulativ...
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The invention discloses a low-power wireless link quality estimation method under cross-protocol interference. A channel is periodically scanned so as to obtain channel noise statistical information,parameters needed by link quality estimation are updated, and the link quality is estimated after the parameters are updated. According to the link quality estimation method, a theoretical bit error rate model in a specific modulation and demodulation mode is combined with background noise distribution, so that the link quality estimation method has relatively high accuracy and is not influenced by the type of an interference source. Secondly, the method only needs to measure the mean value of the distribution of background noise and received signal strength indication in a short time, and haslow communication and calculation overhead. Finally, the method does not need off-line training and modeling, so that the method can quickly adapt to various application scenes, can be used for linkquality estimation of equipment using any wireless technology under the interference of any other wireless technology, and has universality and expansibility.
Description
technical field [0001] The invention relates to the field of low-power wireless communication, in particular to a method for estimating the quality of a low-power wireless link under cross-protocol interference. Background technique [0002] The ISM (Industrial Scientific Medical) frequency band is a common unlicensed wireless frequency band all over the world, and there are cases where multiple wireless technologies use the same frequency band. For example, the WiFi technology based on the IEEE 802.11 standard, the Bluetooth technology based on the IEEE 802.15.1 standard, and the ZigBee technology based on the IEEE 802.15.4 standard all use the 2.4GHz ISM frequency band. Wireless devices using these technologies have become more common in recent years, causing the ISM bands to become increasingly crowded. Mutual interference inevitably exists between devices using different wireless technologies, and such interference is usually called cross-protocol interference (CTI, Cro...
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IPC IPC(8): H04W24/02H04W24/06H04W24/08
CPCH04W24/02H04W24/06H04W24/08Y02D30/70
Inventor 刘伟许鸣夏宇
Owner 南京感深科技有限公司