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Performance Evaluation of IEEE 802.15.6 MAC Under Varying Health Emergency Conditions

机译：不同卫生应急条件下IEEE 802.15.6 MAC的性能评估

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Wireless Body Area Network (WBAN) consists of health and environmental sensing nodes and a dedicated hub. The hub has more processing power and capabilities than the sensor nodes. It collects sensing data and forwards them to corresponding destinations for further processing and actions. In case of emergencies, the hub delivers the received data to the emergency department to take quick action. The end-to-end link between the sensor node and the emergency department mainly depends on the sensor node's bottleneck link and the hub. WBAN nodes communicate with the hub by accessing the physical communication channel in a randomly distributed fashion. Random channel access may cause retransmission of corrupted frames due to frame collisions. This causes performance degradation of the deployed WBAN. The IEEE 802.15.6 standard specified eight different user priorities for different traffic types. Among these priorities, priority seven is dedicated to reporting emergency and medical implant events. If several nodes report at this priority, this causes lower priority nodes to starve. In this work, we allow nodes to switch from lower priorities to priority seven in emergencies. We conducted several experiments to study the effects of priority seven on other nodes in normal operations and emergencies. The study results showed that the packet delivery rate is severely affected when some nodes switch from normal user priority to priority seven. More studies and investigations need to be conducted to determine the optimum operation of WBAN, especially in the case of an emergency.
机译：无线体积网络（WBAN）包括健康和环境传感节点和专用枢纽。集线器具有比传感器节点更多的处理能力和能力。它收集传感数据并将它们转发到相应的目的地以进行进一步处理和操作。在紧急情况的情况下，集中机构将收到的数据提供给急诊部门，以便快速行动。传感器节点和急诊部门之间的端到端链接主要取决于传感器节点的瓶颈链路和集线器。 WBAN节点通过以随机分布的方式访问物理通信信道来与集线器通信。随机通道访问可能导致由于帧冲突而导致损坏的帧传输。这导致部署WBAN的性能下降。 IEEE 802.15.6标准为不同的流量类型指定了八个不同的用户优先级。在这些优先事项中，优先七是致力于报告紧急和医疗植入事件。如果在此优先级报告的几个节点，则会导致较低的优先级节点达到恒星。在这项工作中，我们允许节点从较低的优先级切换到紧急情况下的优先级。我们进行了几次实验，以研究优先级七对正常运营和紧急情况的其他节点的影响。研究结果表明，当一些节点从正常用户优先级切换到优先级时，分组传送率严重影响。需要进行更多的研究和调查以确定WBAN的最佳运作，特别是在紧急情况下。

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