Wireless Sensor Network Data Link Control via LQIV Assessment
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Wireless Sensor Networks (WSNs) face reliability issues due to unstable wireless links, leading to repeated data transfer errors when using protocols like IEEE 802.15.4 and Zigbee, as they do not consider the state of each wireless link, resulting in unreliable data frame transmission.
Innovation Solution
A method that assesses the characteristics of data and Link Quality Indication Value (LQIV) to determine the link state level, allowing for controlled data transfer by adjusting re-transfer attempts, waiting time, and duplication of data frames based on the link state, ensuring reliable data transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If data transfer is performed using IEEE 802.15.4 or Zigbee protocols without considering link state, then data transfer can be initiated, but data transfer reliability deteriorates due to unstable wireless links causing repeated errors
Solution Approach 1:
The patent applies preliminary action by assessing the link state (using LQIV - Link Quality Indication Value) before initiating data transfer. The system determines whether the wireless link is stable or unstable in advance, and based on this assessment, decides whether to proceed with data transfer or wait for link improvement. This prevents unnecessary retransmissions and improves reliability without adding complex real-time control mechanisms during transfer.
2Reliability
If re-transmission attempts are increased to handle unstable links, then data transfer reliability improves, but power consumption increases due to repeated transmissions and waiting
Solution Approach 1:
The patent applies dynamics by making the data transfer strategy adaptive to current link conditions. Instead of using a fixed number of retransmission attempts, the system dynamically adjusts the transfer behavior based on real-time link state assessment. When the link is stable, data transfer proceeds normally; when unstable, the system waits for link improvement, thereby avoiding unnecessary power consumption from repeated transmissions on poor links.
3Reliability
If data transfer proceeds without link state assessment, then transmission speed is maintained, but data transfer reliability deteriorates due to unsuccessful transmissions on unstable links
Solution Approach 1:
The patent applies feedback by continuously monitoring the link state (using LQIV measurements) and using this information to control data transfer decisions. The system receives feedback about link quality, processes this information to determine link stability, and adjusts data transfer behavior accordingly. This feedback mechanism ensures that data is only transmitted when link conditions are favorable, improving reliability without significant speed penalty.
Data Source
AI summary
A method and apparatus for transmitting/receiving data in a Wireless Sensor Network (WSN). The method typically includes the steps of: ascertaining characteristics of data whose transfer is requested; ascertaining a Link Quality Indication Value (LQIV); determining a level of a link state in consideration of the characteristics of the data and the LQIV; and controlling the link transfer of the data in consideration of the level of the link state. The apparatus includes a module for transmitting/receiving data in the network layer thereof having a link level determination unit for predefining a level of a link state, depending on characteristics of data and a Link Quality Indication Value (LQIV) to store a predefined level of the link state, and to determine a level of the link state. A link control unit controls the link transfer of the data in consideration of the determined level of the link state.