Superframe-based efficient media access control method in wireless body area network

Abstract

The invention discloses a superframe-based efficient media access control method in a wireless body area network, mainly solving the problems that an IEEE (Institute of Electrical and Electronic Engineers) 802.15.4 protocol is incapable of distinguishing service priorities and has time slot waste in a non-competitive period in a wireless body area network. The superframe-based efficient media access control method is realized by adopting the steps of: in a competitive period, setting the competitive period into a high priority service dedicated time slot H, a high priority service spare time slot h and a common time slot by adopting a time slot ALOHA competition mechanism based on the service priority, wherein a common node adopts the three different competition mechanisms according to the quantity of high priority services in the current superframe competitive period; and in a non-competitive period, ensuring that allocation and utilization of a GTS (Guarantee Time Slot) service are carried out by utilizing a micro time slot as a unit and adopting a micro time slot mechanism so as to realize the effective utilization of the time slot. Compared with the IEEE 802.15.4 protocol, thesuperframe-based efficient media access control method disclosed by the invention can not only ensure that the high priority service is transmitted with a higher success probability, but also effectively improve the time slot utilization ratio in the non-competitive period and is suitable for the wireless body area network.

Description

technical field [0001] The invention belongs to the technical field of communication, and relates to a media access control method, in particular to a media access control method used in a wireless body area network. Ensure the successful transmission of high-priority services and the effective use of time slots. Background technique [0002] Wireless Body Area Network (WBAN) is a communication network centered on the human body and composed of various nodes and personal terminals distributed on the human body, clothing, and even inside the human body. Through WBAN, people can communicate and synchronize data with their personal electronic devices such as personal digital assistants PDA and mobile phones. WBAN and other data communication networks, such as wireless / wired access networks, mobile communication networks, etc., together constitute a part of the entire communication network. WBAN can communicate with any terminal in the network, such as mobile phone, telephone,...

AI Technical Summary

Problems solved by technology

[0019] The purpose of the present invention is to propose a high-efficiency media based on superframes in wireless body area networks in view of the shortcomings that the IEEE 802.15. The access control method, on the one hand, ensures that high-priority services in the wireless body area network are transmitted with a higher probability of success during the competition period, and on the other hand, realizes the effective use of time slots to meet the application requirements of the wireless body area network

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