RU2791136C1 - Way to reduce power consumption in a wireless sensor network - Google Patents

Abstract

FIELD: wireless sensor networks.

SUBSTANCE: invention makes it possible to determine criteria for selecting the optimal message transmission route in wireless sensor networks, taking into account the physical characteristics of the sensor devices in the wireless sensor network. The method is based on the cosine theorem and allows you to determine the route of message transmission from the source node to the base station, which consumes the minimum amount of energy. This approach assumes that the base station knows the coordinates of the sensor nodes and calculates the linear distances between them.

EFFECT: reduction of the power consumption of the wireless sensor network.

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Description

The invention relates to the field of wireless sensor networks, in particular to methods for increasing the energy efficiency of the network as a whole.

Known invention [1], the technical result of which is the reduction of power consumption from sensor nodes in a wireless sensor network. This method is based on separate stages of switching on and off the power of each sensor node, receiver and transmitter, which reduces power consumption by reducing the operating time of the sensor node.

The disadvantage of the known solution is that this method increases the time for the node to detect the nearest neighbors for rational transmission of the data packet, since in the sleep mode the sensor device cannot report information about the location of the nearest neighbor sensor devices.

The main part of the energy is spent by the sensor device on receiving and transmitting a data packet, much less energy is spent on processing and storing data.

A method is proposed aimed at reducing power consumption in a wireless sensor network, characterized in that a decrease in power consumption occurs precisely at the moment of transmitting a data packet by reducing the power consumed at that moment.

The technical objective of the invention is to reduce the power consumption of sensor nodes in a wireless sensor network, namely, to reduce the amount of energy consumed by sensor nodes when transmitting a data packet.

]; мощность передачи через ретранслятор 3 (Фиг. 1) равна мощности передачи сообщения напрямую от узла-источника 4 (Фиг. 1) к базовой станции 2 (Фиг. 1) при условии, что угол β =

, в ином случае наименьшая мощность будет затрачена при передаче напрямую от узла-источника 4 (Фиг. 1) к базовой станции 2 (Фиг. 1). The technical result is achieved by the fact that the proposed method, when transmitting a data packet from the source node 4 (Fig. 1) to the receiver node, uses an algorithm based on the cosine theorem. Thanks to this algorithm, it is known that the power of transmitting a message through the relay 3 (Fig. 1) is less than the expended power of transmitting a message directly from the source node 4 (Fig. 1) to the base station 2 (Fig. 1) provided that the angle β ∈ (

]; the transmission power through the repeater 3 (Fig. 1) is equal to the transmission power of the message directly from the source node 4 (Fig. 1) to the base station 2 (Fig. 1) provided that the angle β =

, otherwise the least power will be spent when transmitting directly from the source node 4 (Fig. 1) to the base station 2 (Fig. 1).

The way to reduce power consumption in the sensor nodes is as follows: the sensor device 1 (Fig. 1) solves the problem of choosing a route for transmitting messages to the base station 2 (Fig. 1). Inside each sensor device 1 (Fig. 1) there is a program that reports its coordinates and the coordinates of the nearest neighbors. When choosing the optimal message transmission route, spatial characteristics are taken into account and the optimal message transmission route is proposed. The choice of the optimal route comes from the condition of the least power consumption when transmitting a message. Sensor nodes 1 (Fig. 1), knowing the coordinates of the messages, determine the distance to the nearest neighbors and, based on the conditions of the cosine theorem, transmit the message according to the algorithm that consumes the least power. Power is calculated using the Friis formula. By reducing the power when transmitting a message, the amount of energy expended is also reduced.

A source of information

1. Patent No. 2702079 RF, IPC H 04 W 84/18 (2009.01). A method for reducing the power consumption of sensor nodes in a wireless sensor network / Elyagin S.V., Dementiev V.E.; applicant and patent holder TST LLC - No. 2018120261, Appl. May 31, 2018. from 03.10.2019. - 9 s.

Claims (1)

A method for reducing power consumption in sensor nodes, including the transmission of a data packet from the source node to the base station, inside each sensor device there is a program that reports its coordinates and the coordinates of the nearest neighbors, when choosing the optimal message transmission route, spatial characteristics are taken into account and the optimal transmission route is proposed messages, the choice of the optimal route comes from the condition of the least power consumption when transmitting a message, sensor nodes, knowing the coordinates of messages, determine the distance to the nearest neighbors and, based on the conditions of the cosine theorem, where the power of transmitting a message through a repeater is less than the power expended transmitting a message directly from the node - source to the base station provided that the angle β ∈ (

], the transmission power through the repeater is equal to the transmission power of the message directly from the source node to the base station, provided that the angle β =

, otherwise the least power will be spent when transmitting directly from the source node to the base station, the message is transmitted according to the algorithm that consumes the least power.

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