Method and system for controlling wireless sensor network MAC protocol polling based on three types of services

Abstract

The invention relates to a method and system for controlling wireless sensor network MAC (Medium Access Control) protocol polling based on three types of services, and belongs to the field of wireless sensor networks. According to the invention, the method for controlling polling is adopted in an information transmission service system with nodes. The method divides the nodes in the information transmission service system into three types in accordance with service rules, gated services, limited services (K=1) and full service, and among different types of nodes, the transmission of data grouping is successively and orderly conducted through determining polling frames, and the number of information grouping of different types of nodes can provide service in accordance with different service rules upon information transmission. In actual usage, a simple method is provided for differentiating different station points or different business information so as to provide quality QoS (Quality of Service) safeguard, so that differentiated requirements for data transmission is met and system efficiency is increased.

Description

technical field [0001] The invention relates to a wireless sensor network MAC protocol polling control method and system based on three types of services, belonging to the field of wireless sensor networks. Background technique [0002] The high-performance communication of wireless sensor network requires MAC (Medium Access Control) protocol to have QoS (Quality of Service) guarantee function to meet the real-time and reliability requirements of data transmission. At present, media access control technologies for wireless sensor networks are mainly divided into two categories: random multiple access and polling. Contention-based random multiple access technology is difficult to provide reliable and controllable delay guarantees, and collisions also increase energy consumption. The polling system adopts a centralized control method, and the control center allocates resources uniformly, and each station obtains the transmission right in turn, uses the channel without competit...

AI Technical Summary

Problems solved by technology

In the practical application of wireless sensor networks, there are often different stations or different business information in the same system, requiring different delay service quality, etc. For example, for those data that carry a large amount of information and have high real-time requirements, we The transmission of them must ensure the integrity, accuracy and real-timeness of the data information; for the data that carries a relatively small amount of information and allows a certain delay, it can be transmitted with a relatively low-level transmission standard; finally, For some data that carries little information, allows a long time delay and does not have hard requirements for real-time performance, we can choose to send only one data at a time for data transmission, and a single service strategy is difficult to meet this difference.

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