Repeater Placement in Wireless Multi-Hop Networks
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Solution Overview
Problem
Current communication systems requiring repeaters in wireless multi-hop networks face challenges in determining optimal repeater placement without prior information about potential locations, especially when radio wave propagation is affected by obstacles, leading to inefficient and time-consuming site surveys.
Innovation Solution
A communication system that includes a storage unit for location and configuration information, a determination unit to assess the need for repeaters, and a decision unit to calculate the expected power attenuation and decide on repeater placement based on communication quality and site configuration, allowing for calculated placement without pre-selected candidate locations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If multiple arrangement location candidates are pre-selected for repeater placement, then the repeater can be installed at a determined location, but extensive time and efforts are required to actually install and detect wireless devices at each candidate location
Solution Approach 1:
The patent uses simulated detection results (copies of real detection data) to replace actual physical installation and detection at each candidate location. The simulation unit generates detection results based on location information and wireless device distribution, allowing the system to evaluate multiple candidates without physically deploying devices at each site, thus dramatically reducing time and effort while maintaining detection accuracy
Solution Approach 2:
The patent performs preliminary simulation and evaluation of arrangement location candidates before actual installation. By calculating expected detection results and communication quality in advance using location information and wireless device distribution data, the system identifies optimal locations beforehand, avoiding the need for time-consuming trial installations at multiple sites
2Reliability
If arrangement location candidates are re-selected when no suitable location exists in initial candidates, then a suitable repeater location can be found, but the detection procedure must be repeated multiple times increasing time consumption
Solution Approach 1:
The patent implements a dynamic selection process where arrangement location candidates are chosen based on communication quality requirements and obstacle information rather than fixed pre-selection. The simulation unit dynamically evaluates candidates by calculating expected detection results based on wireless device distribution and communication quality thresholds, allowing the system to adaptively identify suitable locations without repeated trial-and-error installations
Solution Approach 2:
The patent introduces simulation results as an intermediary between candidate selection and actual installation. Instead of directly installing at selected candidates, the system first simulates detection results and communication quality, using this intermediate evaluation to guide final location selection, thereby avoiding multiple rounds of physical detection procedures
3Loss of information
If actual installation and detection is performed at each arrangement location candidate, then connectable wireless devices can be detected, but the process becomes time-consuming when there are multiple candidate points
Solution Approach 1:
The patent creates simulated copies of detection results based on location information and wireless device distribution data. The simulation unit generates expected detection information including connectable wireless devices and communication quality without performing actual physical detection, thus obtaining all necessary detection information instantly without time-consuming field procedures
Solution Approach 2:
The patent replaces the mechanical process of physical installation and detection with an information-based simulation system. Instead of physically deploying wireless devices at candidate locations to detect connectable devices, the system uses computational simulation based on location data and wireless device distribution, substituting physical detection mechanics with information processing
Data Source
AI summary
A communication system includes: storage to store location information of each of a plurality of devices capable of wireless multi-hop communication, site configuration information including location and size information of an obstacle present at a site of the plurality of devices, and communication quality information between devices; a determination unit determines whether a repeater needs to be added for each of the plurality of devices, based on communication quality information; and a decision unit calculates an expected value related to attenuation of received power between the first and second devices caused by the obstacle, and decides a location for the determination unit to add the repeater based on location information of the first device determined, location information of the second device different from the first device and communicated with the first device through the repeater, the communication quality information between the first and second device, and the site configuration information.