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A Method for Allocating Emergency Data Slots in Body Area Networks Based on Listening Mechanism

A technology for emergency data and time slot allocation, which is applied in the field of wireless human body sensor networks, can solve the problems of not meeting the real-time and reliability requirements of emergency data, not being able to send in time, and high computational complexity, so as to reduce the probability of retransmission conflicts, reduce Effect of waiting delay and reducing waiting time

Active Publication Date: 2021-10-26
SOUTH CHINA UNIV OF TECH
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  • Claims
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Problems solved by technology

Existing solutions for emergency data transmission have problems such as high computational complexity, inability to send in time, large transmission conflicts, etc., and cannot meet the real-time and reliability requirements of emergency data

Method used

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  • A Method for Allocating Emergency Data Slots in Body Area Networks Based on Listening Mechanism
  • A Method for Allocating Emergency Data Slots in Body Area Networks Based on Listening Mechanism
  • A Method for Allocating Emergency Data Slots in Body Area Networks Based on Listening Mechanism

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Embodiment Construction

[0051] The present invention will be further described in detail below in conjunction with the embodiments and the accompanying drawings, but the embodiments of the present invention are not limited thereto.

[0052] A method for allocating emergency data time slots in body area network based on listening mechanism such as figure 1 shown, and includes the following steps:

[0053] Step 1: Determine the basic rules for nodes to send ordinary data and urgent data. Such as figure 2 As shown, the superframe structure includes a non-competition phase and a contention phase. In the non-competition phase, ordinary data is sent in TDMA mode, and the competition node transmits urgent data in CSMA / CA mode. Before the node sends ordinary data, in the listening period T 0 Listen to the channel inside to ensure that there is no urgent data in the network before sending ordinary data. If during the listening period T 0 If a signal is detected within the node, it indicates that there i...

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Abstract

The invention discloses a method for allocating emergency data time slots of a body area network based on a listening mechanism, which comprises the following steps: determining the basic rules for nodes to send common data and emergency data; The time slot allocation method for nodes to send emergency data; determine the time slot allocation method for multiple nodes to send emergency data. The present invention adopts the listening mechanism, when the node generates urgent data, immediately in the listening period T 0 Send an occupancy signal to send urgent data by occupying the time slot that originally sent ordinary data; when multiple nodes generate urgent data at the same time and generate transmission conflicts, the competition phase is started, and each node uses a competitive method to send urgent data; in the competition phase, the design is based on node Priority back-off strategy, and adjust the change speed of the back-off window according to the network scale, improve the utilization rate of transmission resources and reduce the probability of retransmission conflicts, and ensure the real-time and reliability of emergency data transmission.

Description

technical field [0001] The invention relates to the field of wireless human body sensor networks, in particular to a body area network emergency data time slot allocation method based on an interception mechanism. Background technique [0002] The body area network is composed of several to twenty sensor nodes with small size, communication function and limited energy and a coordinator, which can automatically and intelligently perceive the health data of the human body and provide strong support for smart medical care. Each sensor node can be worn or implanted in the body. Sensor nodes monitor vital signs data such as body temperature, blood pressure, ECG, EEG, etc., and then send these data to the coordinator. The coordinator manages each node and is responsible for the connection between the body area network and the external network, so that data can be transmitted and exchanged safely. [0003] Due to the importance of health data, health data has high requirements fo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W4/38H04W28/04H04W72/04H04W72/10H04W74/08H04L1/18
CPCH04W4/38H04W28/04H04W72/0446H04W74/0833H04W74/0858H04L1/18H04W72/56
Inventor 刘徐迅梁宝文曾衍辉杨磊刘雄英
Owner SOUTH CHINA UNIV OF TECH
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