Independence self-adapting regulation method for sensor node dutyfactor based on IEEE802.15.4

Abstract

The invention relates to an independent self-adaptive adjusting method for duty ratio of a sensor node based on an IEEE 802.15.4 protocol. When the flow rate of the node is less, the dormancy time of the node is prolonged to further reduce power consumption of the node; simultaneously, the receiving frequency of a beacon frame of the node is reduced to further lessen corresponding receive power consumption of the node; when the flow rate of the node is larger, the dormancy time of the node is independently shortened to ensure the performance of end-to-end time delay of the node; and simultaneously, the number of the node in a competitive channel at the same time is reduced to further improve the thuoughput performance. The node simultaneously adopts a high-efficiency energy dormancy mechanism so that the node carries out dormancy ahead of an active phase within a cycle, thereby further saving power consumption of the node. The method ensures high-efficiency energy of the node so thatthe network power consumption and the end-to-end time delay obtain good balance under different network loading conditions and a network coordinator independently and simultaneously carries out self-adaptive adjustment on the duty ratio of each node and an alternate cycle of a beaconing according to data frame sending queue information received from each node.

Description

technical field [0001] The invention relates to an IEEE802.15.4 protocol widely used in wireless sensor networks, a node duty cycle self-adaptive adjustment method and an energy-efficient dormancy mechanism based on the protocol, and belongs to the technical field of wireless network communication. Background technique [0002] Wireless sensor networks (WSNs) are a multi-hop network system formed by a large number of cheap micro sensor nodes deployed in the monitoring area through wireless self-organization. Object's information and sent to observers. [0003] IEEE 802.15.4 is a set of network standards originally developed by the Institute of Electrical and Electronics Engineers for Low-Rate Wireless Personal Area Networks (LR-WPANs). Due to the energy efficiency and robustness of the physical layer (PHY) and the flexibility of the medium access control sublayer (MAC), it is very suitable for low-speed, low-power, low-cost, and low-complexity wireless sensor network applic...

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Problems solved by technology

However, this method retains many characteristics of IEEE 802.15.4, and the network coordinator still uniformly adjusts the same BO of all nodes in the network (that is, the same beacon interval period), and the coordinator only broadcasts the minimum BO before each period. A BO ​​value of , which means that even if only one node in the network has data traffic, the duty cycle of other non-traffic nodes cannot be reduced independently

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