Access Point Guard Interval Radiolocation
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Solution Overview
Problem
Conventional wireless communication systems lack a mechanism for dynamically setting guard intervals based on the environment, leading to either unnecessarily high guard intervals that reduce data rates or guard intervals that are too low, resulting in increased interference.
Innovation Solution
Access points use radiolocation principles to determine the positions of structures in the environment and dynamically set guard intervals to minimize interference while maximizing data rates.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If guard intervals are set high to reduce interference from signal reflections, then interference is reduced, but data rates decrease
Solution Approach 1:
The guard interval is made dynamic rather than fixed. The access point determines the position of reflecting structures using radiolocation and adjusts the guard interval length accordingly. This allows the system to adapt the guard interval to actual environmental conditions, reducing unnecessary guard intervals in open spaces (maintaining high data rates) while providing sufficient guard intervals in environments with reflective structures (reducing interference).
Solution Approach 2:
The system changes the guard interval parameter based on determined structure positions. By calculating the distance to reflecting structures and the corresponding signal reflection timing, the system optimizes the guard interval parameter to match the actual propagation conditions, thereby resolving the contradiction between interference reduction and data rate maintenance.
2Productivity
If guard intervals are set low to maximize data rates, then data rates increase, but interference from signal reflections increases
Solution Approach 1:
The guard interval dynamically adapts to environmental conditions through radiolocation-based structure detection. In environments with minimal reflections, the system uses shorter guard intervals to maximize data rates. When reflective structures are detected, the system extends the guard interval to prevent interference, thus resolving the contradiction between high data rates and low interference.
Solution Approach 2:
The guard interval parameter is adjusted based on the measured distance to reflecting structures. The system calculates the optimal guard interval length considering the round-trip time for signal reflection, enabling it to maintain high data rates when possible while preventing interference when necessary.
3Device complexity
If conventional fixed guard intervals are used, then system complexity is low, but adaptability to different environments is poor
Solution Approach 1:
The access point integrates radiolocation functionality with existing wireless communication functions. The same radio infrastructure is used both for determining structure positions and for data transmission, making the system multi-functional without requiring separate dedicated hardware systems, thus maintaining relatively low complexity while achieving high adaptability.
Solution Approach 2:
The system implements a feedback loop where the access point continuously determines structure positions using radiolocation and adjusts guard intervals based on this information. This closed-loop control enables the system to adapt to changing environmental conditions automatically, significantly improving adaptability while adding only moderate complexity through the integration of position determination and parameter adjustment.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach allows access points to automatically adjust guard intervals based on environmental changes, reducing interference and optimizing data rates in varying environments.
Implementation Method 1
A first radio receives a reflection comprising a signal reflected by a structure
Implementation Method 2
Access points use radiolocation principles to determine the positions of structures in the environment
Data Source
AI summary
The present disclosure describes a technique for access points to set guard intervals. An apparatus includes a first radio, one or more memories, and one or more processors communicatively coupled to the one or more memories. The first radio receives a reflection comprising a signal reflected by a structure. A combination of the one or more processors determines, based on the reflection, a position of the structure, sets a first guard interval based on the position of the structure, and transmits a first message according to the first guard interval.