Method for evaluating wireless sensor network link quality based on CCI (chip correlation indicator) perceptual packet-loss
A wireless sensor and network link technology, which is applied in the field of wireless sensor network link quality assessment, can solve problems such as insufficient response and energy consumption, and achieve the effect of reducing excessive unnecessary energy consumption
Inactive Publication Date: 2010-07-14
NANCHANG HANGKONG UNIVERSITY
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[0003] However, the current conventional PRR-based link quality assessment mechanism has the disadvantages that its response is not fast enough and it requires a large number of detection packets as a premise, which leads to unnecessary energy consumption
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[0036] The wireless sensor network link quality evaluation mechanism based on CCI perception packet loss of the present invention, the steps are as follows:
[0037] Research on the wireless transceiver chip, and start from the data sending and receiving process of the wireless transceiver chip and the essential factors that affect the quality of the link, conduct an in-depth analysis and research on the reasons for the perceived packet loss of the link in the wireless sensor network, and give The cause chain of data frame transmission errors in a wireless sensor network, such as figure 1 shown.
[0038] On the basis of the above analysis, it is concluded that the main factor affecting the packet loss rate of the link perception is the chip error rate, and according to the analysis of the CC2420 wireless transceiver chip, it is concluded that the CCI can reflect the chip of the current link to a certain extent error rate.
[0039] On the basis of step 1, the relationship bet...
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The invention relates to a method for evaluating wireless sensor network link quality based on CCI (Computer Communication Interface) perceptual packet-loss, which comprises the specific steps of researching and analyzing the perceptual packet-loss of a wireless link based on the receiving and dispatching process of data and essential factors influencing the quality of the link; researching the relationship between the CCI and SER (symbol error rate) of the link based on packet-loss and modeling; providing a relation conversion formula of the SER and PRR (packet receive rate) based on packet-loss; establishing a relation mapping model of the CCI and the PRR based on packet-loss; and introducing a Kalman filter for denoising, aiming at the characteristic that the fluctuation range of the CCI is bigger during evaluation. The invention has the advantages of obtaining a more accurate link evaluation value by using fewer probe packets and lowering unnecessary energy consumption caused by sending large amount of probe packets by the link during evaluation.
Description
technical field [0001] The present invention relates to a wireless sensor network link quality assessment method, in particular to a wireless sensor network link quality assessment method based on CCI perception packet loss. Background technique [0002] The wireless sensor network is a fully distributed system. Many sensor nodes are randomly deployed in the monitoring area. The sensor nodes form a network in a wireless self-organizing manner, and the communication between them uses low-power radio frequency signals, that is, electromagnetic waves. The various characteristics of radio waves, such as wave reflection, diffraction, and multipath effects caused by reflection, etc., coupled with the complex and changeable environment in which it is transmitted and the existence of interference signals, make the communication quality between nodes seriously affected. influence and constraints, resulting in random and unstable links between nodes. In order to ensure the efficient ...
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IPC IPC(8): H04W24/08H04W84/18H04L1/00
CPCY02B60/50Y02D30/70
Inventor 舒坚刘琳岚
Owner NANCHANG HANGKONG UNIVERSITY