Routing protocol for intermittently connected wireless sensor network

Abstract

The invention discloses a routing protocol for an intermittently connected wireless sensor network. The routing protocol comprises an initializing stage S1 and a running stage S2, and specifically comprises the steps that the number of layers of all sensor nodes in the network is determined; next-hop neighbor tables of all the sensor nodes are determined; forwarding sets are determined: nodes in the next-hop neighbor table of each sensor node are respectively sequenced in a descending order according to SLQE (Software-based Link Quality Estimator) measurement of forming a link together with current nodes and first k nodes are taken to form the forwarding sets of the current nodes; the forwarding sets of each node in the sensor network are sequenced to generate sequenced forwarding sets; each node in the network forwards a data packet to a next-hop node according to the sequenced forwarding set until the data packet is transmitted to a sink node. The routing protocol for the intermittently connected wireless sensor network has the advantages that the problems of poor real-time performance and poor reliability of data collection due to unreliability and instability of a wireless link are solved, and the network lifetime, the data forwarding rate and the transmission delay during data collection are balanced.

Description

technical field [0001] The invention relates to the field of wireless sensor networks, in particular to a routing protocol for intermittently connecting wireless sensor networks. This protocol is suitable for a class of applications that require a long network lifetime and certain reliability and real-time data collection. Background technique [0002] Data collection is a basic function that all wireless sensor network applications must have. For example, in the application of field deformation monitoring of earthen ruins, it is necessary to collect information such as temperature, humidity, luminosity, and salinity of earthen ruins, and then analyze the risk of earthen ruins. evaluate and take appropriate protective measures. How to aggregate these data to the sink node (base station) through multi-hop routing, so that the data collection meets certain reliability and real-time performance, and at the same time ensure that the network has a long life span has become a pro...

AI Technical Summary

Problems solved by technology

However, the allocation of node work scheduling requires a lot of communication and computing overhead, resulting in a lot of energy overhead

In addition, when RMS selects the forwarding set, it does not consider the energy factor of the sensor nodes. It simply uses the link quality as a reference to select the forwarding set, which will easily lead to the energy depletion of some nodes due to frequent use, which greatly reduces the network lifetime.

These factors make RMS unsuitable for monitoring with a long network lifetime, such as deformation monitoring of field earthen sites

Images