Priority forwarding method based on number of paths

Abstract

The present invention discloses a priority forwarding method based on the number of paths. A backoff mechanism of the method is that once forwarding nodes encounter the data collision status, the sizes of the backoff windows of the collided forwarding nodes are decided by the numbers of the selectable paths of the forwarding nodes, the retransmission time of the nodes is staggered by the different numbers of the forwarding paths, and the data of the forwarding node having the less forwarding paths is sent preferentially, thereby guaranteeing that the data of the forwarding node having the less paths can be sent out, also avoiding that the data transmission is too congested in a part of regions, and also being able to utilize the bandwidth of a whole network effectively to increase the throughput of the network and improve the data reception rate. The priority forwarding method based on the number of paths of the present invention is based on a competitive MAC protocol, by the reasonable backoff mechanism, enables the flow load of the node data to be balanced, the bandwidth to be utilized fully and the data transmission power consumption to be reduced, at the same time, avoids the interference among nodes, and can be effectively applied to the network needing to acquire data rapidly.

Description

technical field [0001] The invention belongs to the technical field of wireless sensor networks, and in particular relates to a priority forwarding method for wireless sensor networks based on the number of paths, which is applicable to fast acquisition scenarios. Background technique [0002] With the in-depth development of wireless sensor network technology, the transmission data of nodes is no longer satisfied with a single light load, and has gradually entered the era of heavy loads such as sound and images. The fast acquisition scene for heavy load processing has emerged as the times require, and has become One of the current technology research hotspots. Fast collection scenarios require fast data collection and effective handling of heavy traffic loads, but sensor nodes have very limited energy and storage space, and can only store and process data limitedly, which requires us to design a method to make data transmission reasonable Use the space capacity of network ...

AI Technical Summary

Problems solved by technology

[0005] The current asynchronous low-power protocols often use a random backoff mechanism when encountering data collisions. This mechanism cannot make dynamic changes according to the actual path transmission conditions, and it will easily cause nodes with fewer paths to fail in long-term competition, unable to send data, or even As a result, the data is too concentrated in a certain area, which intensifies the path competition and leads to the failure of the competition, which greatly affects the utilization efficiency of the overall network space and the power consumption of the network.

Images