Rapid awakening method and system in technical field of wireless communication

Abstract

The invention provides a rapid wakeup method and system in the technical field of wireless communication. The method comprises the following steps: a transmitting end and a receiving end appoint a wakeup frequency f0; when awakening is carried out, the sending end generates an awakening signal at an awakening frequency agreed with the receiving end, and the awakening signal is composed of two sections of signals which are respectively an upper frequency sweep signal or a lower frequency sweep signal with the signal frequency linearly rising or falling for T milliseconds from the awakening frequency f0 at the slope u0, the signal frequency linearly drops or rises for T milliseconds from the slope u0 to a lower or upper sweep frequency signal of wake-up frequency f0; sending a wake-up signal in an agreed time slot; and in the dormant state, the receiving end is temporarily awakened in an appointed time slot, two receiving windows with the duration of L milliseconds are opened, receiving signals in the two windows are processed, and if an awakening condition is met, the receiving end enters a continuous awakening state. According to the method, the chirp signal not only can be used for awakening, but also can be used for synchronization, so that the system reliability is improved.

Description

technical field [0001] The present invention relates to the technical field of wireless communication, and more specifically, to a fast wake-up method and system in the technical field of wireless communication. Background technique [0002] Low Power Wide Area Network (LPWAN) is optimized for M2M (Man to Man, Man to Machine, Machine to Machine) communication scenarios in IoT applications, powered by batteries, low speed, Ultra-low power consumption, low duty cycle, long-distance wireless network communication technology that supports a single node with a maximum coverage of up to 100 kilometers of cellular convergence gateway. With the rapid development of IoT applications, there will be a large number of low-power IoT terminal access networks in the future. The large-scale deployment of LPWAN networks needs to be able to simultaneously meet the requirements of high load, high capacity, high reliability, long-range coverage, low overhead, and low cost. latency and low powe...

AI Technical Summary

Problems solved by technology

[0004] The carrier of method 1 is a single-frequency signal. Since the channel cannot be guaranteed to be clean, it is prone to false wake-up caused by illegal signal interference, and the probability of false wake-up cannot be calculated and evaluated, so the system reliability is greatly reduced.

Method 1 and Method 2 have fewer wake-up signal groups, and it is impossible to realize the diversity of wake-up signals

In method 2 and method 3, in order to reliably receive the wake-up signal, the receiving window needs to be longer than the cycle of the wake-up signal, resulting in an increase in power consumption

Most of the existing wireless wake-up technologies are cumbersome and require high hardware requirements for implementation

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