Method for controlling transmission of sink nodes in wireless sensor network

A wireless sensor and aggregation node technology, applied in wireless sensor network protocol design, wireless network field, can solve problems such as low performance, large bandwidth delay product, link bandwidth asymmetry, etc., to improve throughput, improve stability, The effect of less fluctuation in the send window

Inactive Publication Date: 2009-10-14
SOUTHEAST UNIV
View PDF0 Cites 28 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the wireless network environment where the aggregation node is located has the characteristics of high bit error rate (Bit Error Rate, BER), link bandwidth asymmetry, and

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method for controlling transmission of sink nodes in wireless sensor network
  • Method for controlling transmission of sink nodes in wireless sensor network
  • Method for controlling transmission of sink nodes in wireless sensor network

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0019] The technical solution of the present invention will be further described below in conjunction with the drawings and specific implementation examples.

[0020] The method for measuring the available bandwidth based on the arrival interval of ACK packets in the present invention is to measure the time interval of the arrival of the acknowledgement packet and average the time interval to calculate the available bandwidth, and then use a filter to filter the measured available bandwidth to eliminate errors. This results in a more accurate measurement of the available bandwidth. The specific method is as follows: Assuming that the size of the data packets are all P, after passing through the bottleneck link, the data packets form a certain interval, and the time interval formed by ACK packets after reaching the destination node is Δt 1 , Δt 2 , Δt 3 ..., Δt n-1 , Δt n , The available bandwidth measurement value is:

[0021] B = Σ ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention provides a method for controlling the transmission of sink nodes in a wireless sensor network. The method comprises the following steps: firstly, averaging the confirmed time intervals of ack packets, then, measuring the available bandwidth and further filtering the acquired available bandwidth with a filter to eliminate errors, thereby acquiring the more accurate value of the available bandwidth; dividing the congestion avoidance stage into two linear-growth stages by measuring the buffer length of the bottleneck link and combining the estimated value of the available bandwidth, particularly, increasing the sending rate of data packets towards the maximal network capacity rapidly and then reducing the rate of reaching the maximal network capacity, so that the sending process can remain stable at a higher sending rate for a long time; and distinguishing congestion packet loss from wireless error code packet loss by the buffer length of the bottleneck link when the packet loss occurs, and rapidly restoring the sending window to the normal size in the wireless sensor network environment with a higher bit error rate, so that the ssthresh (slow start threshold) and the sending window can be adjusted to a proper value according to the network status, and the stability and the throughput rate of the transmission can be effectively improved.

Description

technical field [0001] The present invention relates to the field of wireless networks, in particular to the field of wireless sensor network protocol design, and specifically provides a transmission control method for a convergence node in a wireless sensor network, although the given features can be applied to other network designs. Background technique [0002] The system structure of wireless sensor network is as follows: figure 1 As shown, it usually includes a sensor node (SensorNode), a sink node (Sink Node) and a management node (Manager Node). A large number of sensor nodes are arranged in the monitoring area, and the nodes form a network through self-organization. The information collected by the sensor node itself is preliminarily processed locally, and then sent to the sink node in a multi-hop manner. The aggregation node is also called a gateway, which can aggregate the report data of nearby sensor nodes, pick out some erroneous or abnormal data, perform data ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): H04W28/04H04W28/10H04W84/18H04L1/16H04L1/00
Inventor 姚国良时龙兴
Owner SOUTHEAST UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap