Ad Hoc Network Metric Computation Using Error Rate and Electric Field Intensity
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing wireless communication technologies in ad hoc and mesh networks face challenges in appropriately generating and managing communication paths, especially when error rates and link quality vary, affecting data transmission efficiency and network coverage.
Innovation Solution
An information processing device that computes metric values based on error rates and electric field intensity, uses low-pass filters, and dynamically adjusts communication paths by setting new paths based on threshold values and priority, ensuring efficient data transmission and network expansion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the metric value is computed using the error rate when the error rate is lower than a threshold value, then the communication path management accuracy is improved, but the device complexity increases due to conditional computation logic
Solution Approach 1:
The patent changes the computation parameter (error rate) dynamically based on threshold conditions. When the error rate is below a threshold, the metric computation uses the error rate; when above the threshold, it uses alternative parameters. This conditional parameter switching resolves the contradiction by improving measurement precision only when necessary, avoiding unnecessary computational complexity.
2Adaptability or versatility
If the metric value is estimated based on current electric field intensity when the elapsed time is longer than a threshold value, then the adaptability to varying link quality is improved, but the measurement precision may deteriorate due to time-based estimation
Solution Approach 1:
The patent implements dynamic metric value estimation that adapts to changing link quality conditions over time. When the elapsed time since final data transmission exceeds a threshold, the system estimates metric values based on current electric field intensity rather than relying on outdated measurements. This dynamic adaptation improves versatility in varying link quality conditions while accepting reasonable precision trade-offs for time-varying environments.
3Stability of the object's composition
If the low-pass filter processes the metric value using the data rate as initial value, then the stability of communication path selection is improved, but the response time to detect link quality changes increases
Solution Approach 1:
The patent applies a low-pass filter to the metric value with the data rate as the initial value, creating a continuous and stable communication path selection process. The filter smooths out rapid fluctuations in metric values, providing stable path selection. While this filtering inherently delays response to sudden link quality changes, the continuous processing ensures that trends are eventually detected and responded to, balancing stability with eventual responsiveness.
Data Source
Figure 1
Figure 2
Figure 3a~3b
AI summary
Generation and management of a communication path between a plurality of information processing devices are properly performed. An information processing device is an information processing device equipped with a communication unit and a control unit. The communication unit performs exchange of a signal for generation or updating of a multi-hop communication path using wireless communication with another information processing device. In addition, the control unit performs control to change a metric value included in the signal for generation or updating of the multi-hop communication path based on a state of the information processing device.