Polar coordinate division management-based service discovery method in wireless mobile network

Abstract

The invention discloses a polar coordinate division management-based service discovery method in a wireless mobile network. The method comprises that: a network is subjected to cluster division, a cluster head is optionally selected to serve as an origin of a polar coordinate, all neighboring cluster heads of the origin form a first ring, neighboring cluster heads of the cluster heads on the first ring form a second ring, by parity of reasoning, a coverage network is generated, wherein neighboring cluster heads on each ring meet the condition of neighboring geographical positions, and the position of each cluster head on the ring is represented by the polar coordinate; service attribute information is mapped as a numerical value represented by the polar coordinate, wherein the numerical value and node information belonging to the numerical value are stored at a cluster head corresponding to the numerical value; and a service request node finds a node where service resources are positioned through a polar coordinate numerical value corresponding to the service attribute information, and establishes connection. Through the method, the nodes cooperatively establish the coverage network according with a physical distribution structure in a two-dimensional coordinate description mode, excessive data packets cannot be generated in the process of registering and searching resources, and efficient registers and search of service resources are realized.

Description

technical field [0001] The invention relates to the field of wireless sensor networks, in particular to a service discovery method for searching resources of other nodes in a distributed environment. Background technique [0002] As wireless mobile devices are more and more widely used in daily life, how to find services or resource files in other mobile devices quickly and consume as little energy as possible is a problem widely concerned by manufacturers. And the service discovery function, as the core component of the next-generation Internet of Things, plays a very critical role in system performance. [0003] In the wireless network environment, there is a P2P peer-to-peer relationship between each terminal node, and they all play the role of routing nodes in the network. When a node needs a certain resource file, the easiest way is to flood and ask each node whether it has this file. This method is very easy to generate a network packet storm, causing other nodes to ...

AI Technical Summary

Problems solved by technology

However, many wireless sensor nodes are currently used in buildings, mines, forests or oceans, and mobile devices cannot obtain their own GPS information

Moreover, the coverage area of ​​the CAN algorithm framework improved by GPS is generally uneven and cannot be adjusted, which will inevitably cause uneven node access frequency, resulting in more local node access and faster energy consumption, reducing the entire life cycle of the system.

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