A fast transmission method of emergency services in wireless body area network

Abstract

The invention discloses a burst transmission method for an urgent service in a wireless body area network. A communication link tree network is used for distributing time slots in a sequence from bottom layer nodes to top layer nodes according to a network structure. The time slots are formed by an access time frame t0 and an access time frame t1 in the process of processing the urgent service and a time frame t2 in the process of transmitting the service. When the urgent service exists in a node, a time slot expropriating request begins to be broadcast in a next time slot. The t0 time frame of the current time slot is monitored, if the time expropriating request is monitored, priority is judged on the node where the urgent service occurs, the urgent service with high priority is transmitted in the t2 time frame of the current time slot, whether the urgent service is transmitted to a root node or not is judged, if not, the time slot expropriating request continues to be sent in the next time slot, and the steps are repeated until the urgent service is transmitted to the root node in a relay mode. According to the burst transmission method for the urgent service in the wireless body area network, large handling capacity of an ordinary service is guaranteed, and the urgent service is fast and reliably transmitted to the root node with little cost.

Description

technical field [0001] The invention relates to a service transmission method in a wireless body area network (WBAN), in particular to a fast transmission method for emergency services in a wireless body area network. Background technique [0002] In recent years, on a global scale, the problem of population aging has become increasingly prominent, and the number of patients with various chronic diseases has increased sharply. The resulting high medical insurance costs have also brought enormous pressure on the country's finances. How to efficiently monitor the human body in real time remotely has become a research hotspot. The international organization IEEE (Institute of Electrical and Electronics Engineers) has also formulated the 802.15.6 protocol to regulate its application. WBAN is a specific application example of this agreement. The sensors in WBAN are miniaturized and worn on the body surface or implanted under the skin. Therefore, the energy consumption of the de...

AI Technical Summary

Problems solved by technology

This scheme can send urgent business with low delay, but some "listening windows" are inserted in each frame, which will inevitably lead to waste of communication resources; in addition, the insertion algorithm has a certain complexity, and the insertion of listening windows There is no good optimal solution for the number of

Finally, although this solution has a channel for transmitting emergency services, it cannot guarantee that emergency services will be reliably delivered to the Coordinator within the "listening window".

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