End-to-end delay upper bound assessment method based on retransmission feedback for wireless sensor network

A wireless sensor and network technology, applied in network topology, wireless communication, network traffic/resource management, etc., can solve the problem of single model, no consideration of the network feedback effect of packet loss and retransmission, and no consideration of the effective service capability of the retransmission mechanism. Influence and other issues, to achieve the effect of controlling real-time performance and ensuring real-time performance

CN106102084AActive Publication Date: 2016-11-09INST OF IND INTERNET CHONGQING UNIV OF POSTS & TELECOMM
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2016-11-09

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Abstract

The invention relates to an end-to-end delay upper bound assessment method based on retransmission feedback for a wireless sensor network, and belongs to the technical field of wireless sensor networks. The method comprises the following steps: S1, determining a composition form of sensor data streams and a transmission process of the sensor data streams in a network; S2, building a data stream retransmission feedback model according to network link quality, and analyzing the service capability of the network specific to all the data streams; S3, performing priority scheduling on original data streams and retransmitted data streams, and determining a service bandwidth allocated to the original data streams; S4, analyzing delay composition of sensor input data streams in an entire end-to-end network system to obtain components of fixed delay and variable delay; S5, calculating network end-to-end variable delay caused by the network service capability; and S6, acquiring the delay upper bound of an end-to-end network of data streams to be analyzed. Through adoption of the method, the timeliness of industrial wireless communications is ensured; quantitative analysis can be performed on network end-to-end communication delay at the beginning of network construction; and control of the timeliness of the industrial wireless communications is facilitated.
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Description

technical field

[0001] The invention belongs to the technical field of wireless sensor networks, and relates to a method for evaluating the upper bound of end-to-end time delay of wireless sensor networks based on retransmission feedback. Background technique

[0002] In recent years, wireless sensor network (WSN) technology has developed rapidly and has been widely used in various aspects such as military applications, natural environment monitoring, industrial production monitoring, medical care and smart home, and is one of the current research hotspots. However, due to the influence of the environment, the wireless link of the wireless sensor network is relatively unstable, and the wireless link usually needs to transmit data in a multi-hop manner, and because a large number of wireless sensor network applications need to provide real-time guaranteed services, the wireless sensor network The research on the end-to-end delay upper bound has become one of the key issues. ...

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Embodiment Construction

[0042] The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0043] The wireless sensor network topology in this embodiment is as follows figure 2 , its configuration is as follows: the wireless sensor network works in the 2.4G frequency band specified by IEEE802.15.4, and the channel is a symmetrical model. Taking a link in a network as an example, the network link is a non-ideal link, which is mainly reflected in the existence of a certain channel bit error rate. Set the arrival rate of the input data flow to 0.2kbps, and the size of each data packet is 127bytes. If there is a packet loss and misreporting during the transmission of the data frame, it is judged whether it needs to be retransmitted according to whether the ACK confirmation frame is received.

[0044] The present invention is a method for calculating the end-to-end delay upper bound of wireless sensor networks based on retransmissio...