Neighbor discovery method for low duty cycle sensor networks based on unequal wake-up time slots

Abstract

The invention discloses a low-duty ratio sensor network neighbor discovery method based on unequal wake-up time slots. A wake-up time slot of unequal length and a one-way neighbor discovery method are used. The time axis is divided into multiple consecutive time slots of equal length, and the time slot length is τ. A cycle consists of t consecutive time slots, and two wake-up time slots, A and C, are constructed in each time slot cycle. There is one A time slot, which is located at the 0th time slot position of each cycle, and the C time slot is divided into There are two parts of IP and BP, BP is in the wake-up state, IP is in the idle state, and the wake-up duration of BP is only enough to send one frame of data. A matrix M with n rows and t columns is formed with n cycles. There are t / 2 C time slots in a matrix, and t / 2 C time slots are evenly distributed to n rows. At the end of the A time slot and the C time slot, there is a time slot overflow for sending a frame of data, and each node works according to the mode specified by the matrix M, repeating every T time slots. The present invention solves the existing technical problems and greatly improves the energy efficiency of neighbor discovery. Adapt to a variety of different scenarios.

Description

1. Technical field [0001] The invention relates to the technical field of wireless sensor networks, in particular to neighbor discovery in the sensor network, in particular to a low-duty-cycle sensor network neighbor discovery method based on wake-up time slots of unequal lengths. 2. Background technology [0002] Wireless sensor networks are more and more widely used. But the problem of energy consumption has been perplexing the development of wireless sensor network technology. Because the nodes in the wireless sensor network are powered by batteries, and due to the complexity of the environment, the batteries are not easy to replace or charge, so the energy of the nodes is very limited. Since wireless sensor networks are mostly self-organizing, before networking, nodes lack information about their neighbors, so neighbor discovery is the first step in network construction and the premise of routing, especially in mobile networks, due to the neighbor relationship between n...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the problem that the existing asynchronous neighbor discovery method has a large discovery delay and high energy consumption, that is, the energy efficiency is not high enough

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