Adaptive Allocation of Guard Slots and Performance Evaluation Method for Wireless Body Area Networks

Abstract

The invention discloses a protection time slot self-adaptive distribution and performance evaluation method of a wireless body area network. The method comprises following steps of a), setting K+1 priorities expressed by 0, 1 and the like, and K; b), setting five traffic states of a very high VH traffic state, a high H traffic state, a middle M traffic state, a low L traffic state and a very low VL traffic state; c), setting a protection time slot starting threshold value Tth; d), distributing the priorities and setting the traffic states; e), if GTS requests or data needs to be sent, improving the traffic states and reducing the priorities; otherwise, reducing the traffic states and improving the priorities; and f) if there are priorities less than the starting threshold value, distributing GTS resources to the nodes with the minimum priorities. According to the self-adaptive distribution method, the use efficiency of the GTS resources is improved; the network throughput is improved; the use conditions of the GTS resources of the nodes can be predicted well; the defect that the nodes with low priorities cannot use the GTS resources for a long time is avoided; and emergency data transfer timeliness, reliability and fairness of the wireless body area network are ensured.

Description

technical field [0001] The present invention relates to a protection time slot adaptive allocation method, more specifically, to an 802.15.4-based automatic protection time slot that can ensure the real-time performance, reliability and fairness of emergency data transmission in wireless body area networks. Adaptive distribution and performance evaluation methods. Background technique [0002] With the rapid development of wireless communication technology, wireless body area network (WBAN) has been widely used in medical, sports, entertainment, environment perception and other fields. According to the communication requirements of different application scenarios, the performance indicators of the network are also different, such as delay, throughput, reliability, power consumption, etc. WBAN includes various data types, such as periodic data, intermittent data, emergency data, etc. For urgent data, the Guard Time Slot (GTS) allocation mechanism of the IEEE 802.15.4 standa...

AI Technical Summary

Problems solved by technology

The main disadvantages of this GTS resource allocation are: 1) The fixed FCFS service principle often cannot meet the application scenarios with strong real-time performance and large traffic; 2) The abuse of GTS will cause other data to be unable to be transmitted in time, reducing network throughput; 3) resulting in Nodes with low data transmission frequency cannot use GTS resources for a long time

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