Node dynamic dispatching method suitable for wireless body area network under emergency condition

A wireless body area network and network scheduling technology, applied in the field of communication, can solve problems such as waste of resources, and achieve the effects of improving capabilities, reducing consumption, and reducing transmission delays

Active Publication Date: 2013-09-04
CHONGQING UNIV OF POSTS & TELECOMM
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Problems solved by technology

[0012] The technical problem to be solved by the present invention is that, in view of the shortage of resources in the emergency state of the body

Method used

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  • Node dynamic dispatching method suitable for wireless body area network under emergency condition
  • Node dynamic dispatching method suitable for wireless body area network under emergency condition
  • Node dynamic dispatching method suitable for wireless body area network under emergency condition

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Embodiment Construction

[0035] The body area network network operation is divided into normal mode and emergency mode. In normal mode, there is no dangerous data in the network. After a node is connected to the network, the central node sets its priority and resource configuration according to user needs, and stores the priority and resource configuration of the node. When the node collects dangerous data, it constructs an alarm frame and sends it to the central node in the EAP stage. After the central node receives the alarm frame, the network enters the emergency mode.

[0036] figure 1 It is a schematic diagram of the structure of the double-beacon superframe mode of the body area network. It is mainly composed of EAP (exclusive access phase), CAP1 (competition access phase 1), MAP (management access phase), B2 frame and CAP2 (competition access phase 2). The beacon frame is used for node network access, time synchronization, and unified management of nodes in the network. EAP (Exclusive Acces...

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Abstract

The invention relates to a network managing and dispatching method of the body area network, and provides a dynamic dispatching method based on a double-beacon superframe mode. The dynamic dispatching method solves the time delay problem of exigency data uploading of the body area network. The double-beacon superframe mode with a beacon frame and a B2 frame being enabled together is adopted, a middle node carries out dynamic setting on priority of the node according to an alarm received in an EAP stage and data received by an MAP stage, and network resource allocation of the node is redistributed according to the priority at the same time. When current MAP remaining slot time cannot meet requirements for visit resources of an alarming node, the central node reconfigures network resources through the B2 frame and a dispatching command frame, a low priority cluster node is dispatched through the B2 frame, and network resources such as a visit slot time value and a visit cycle required by data uploading of a high priority node are met due to the fact that other slot time is occupied or visited. Single nodes with different priorities are dispatched and managed one by one through the dispatching command frame.

Description

technical field [0001] The invention belongs to the technical field of communication, and relates to a network scheduling method, specifically a scheduling method for a wireless body area network in an emergency state. On the premise of ensuring the stable operation of the body area network, the method dynamically schedules the resource configuration of the network, and the maximum Minimize the sending delay of urgent data. Background technique [0002] The body area network mainly provides the monitoring service of the parameters of human vital signs. The body area network monitoring system sets the sampling cycle, number of access time slots, and access cycle of nodes in the network according to the special circumstances of the user. In different health conditions, vital sign parameters change dynamically. Therefore, the network needs to dynamically set network resource configuration parameters such as sampling period, number of access time slots, and access period of nod...

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Application Information

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IPC IPC(8): H04W72/12
Inventor 李勇王平王朝刚李小龙刘铸德
Owner CHONGQING UNIV OF POSTS & TELECOMM
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