A competition-oriented node dormancy method applied to wban

Abstract

The invention relates to a node sleeping mechanism based on competitive orientation applied to a WBAN. The mechanism comprises a step of setting a competition I period, a competition II period and a competition III period for a CAP stage according to a node priority, a step of dividing the CAP stage into a competition period CI, a competition period CII and a competition period CIII according to different competition periods, setting a completion oriented mechanism, controlling a node with a priority to only access at a competition period, wherein the nodes with similar priorities have a same competition level, and a step of adding a sleeping mechanism into a CAP time period with the setting of competitive orientation, which means that the node is controlled to sleep in irrelevant time periods. According to the node sleeping mechanism, the extra time delay problem caused by data packet retransmission can be improved, at the same time the energy efficiency is improved, and the node sleeping mechanism can be widely applied to a WBAN environment with nodes of different priorities.

Description

technical field [0001] The invention relates to a node dormancy method, in particular to a competition-oriented node dormancy method applied to WBAN. Background technique [0002] Wireless Body Area Network (WBAN) is a wireless sensor network applied around the human body, and has important applications in telemedicine, health diagnosis, pathological monitoring, etc. WBAN has a series of characteristics different from traditional sensor networks. Energy consumption and delay are important performance indicators for analyzing WBAN. Because the MAC layer of the network defines issues such as node access and resource allocation, it often plays a decisive role in the overall performance optimization of the network. Therefore, research on WBAN transmission standards and MAC layer protocols is increasing. [0003] The current transmission standard applied to WBAN is the IEEE 802.15.6 standard, which is a special transmission standard proposed by the IEEE working group to promote ...

AI Technical Summary

Problems solved by technology

However, through research, it is found that the following problems exist in the competition process in the actual environment: in a multi-node network environment, high-priority nodes are prone to "selfish" nodes, occupying a large number of channel resources, and preempting low-priority node resources, making low-priority nodes The priority node data packet transmission success rate is low, and the number of repeated transmissions is large, causing a large additional delay. This situation does not meet the low-latency requirements of wireless WBAN.

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