Wireless Apparatus Dynamic Interframe Space Selection
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Solution Overview
Problem
CSMA/CA systems face inefficiencies in point-to-point near field communication due to increased overhead and decreased efficiency when used in environments with coexisting wireless systems that have unpredictable transmission periodicity, leading to unfair medium sharing and interference.
Innovation Solution
A wireless communication apparatus that stores two sets of inter frame spaces, allowing selection based on interference conditions, to dynamically adjust inter frame spaces and avoid interference with other systems, ensuring fair medium access.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If CSMA/CA is used to control non-transmission periods to suppress interference, then interference from and to other wireless systems is suppressed, but overhead increases and efficiency decreases
Solution Approach 1:
The system dynamically switches between two sets of interframe space parameters (first set with shorter intervals for efficiency, second set with longer intervals for interference suppression) based on detection of other wireless systems, allowing adaptive optimization of the contradiction between efficiency and interference suppression
Solution Approach 2:
The invention changes the parameter values of interframe spaces by selecting between two predefined sets, where the first set optimizes for communication efficiency and the second set optimizes for interference suppression, enabling parameter adaptation to environmental conditions
2Object-affected harmful factors
If CSMA/CA is used in environments with coexisting wireless systems, then interference is reduced, but medium sharing fairness deteriorates due to unpredictable transmission periodicity
Solution Approach 1:
The system dynamically adapts its interframe space configuration based on the presence of other wireless systems, switching between two sets to maintain fair medium sharing while reducing interference, thereby improving adaptability to coexisting systems
Data Source
AI summary
An electronic apparatus includes processing circuitry configured to select a first interval to be used for an access to a medium when a first condition is satisfied. The first interval has a fixed length shorter than DIFS (distribute coordination function inter frame space) defined in IEEE802.11 standard. The processing circuitry is also configured to select a second interval to be used for the access to the medium when a second condition different from the first condition is satisfied. The second interval has a fixed length equal to or longer than the DIFS defined in the IEEE802.11 standard. The electronic apparatus also includes wireless circuitry configured to access the medium to transmit a radio wave conforming to a first wireless specification different from the IEEE802.11 standard after the medium is idle for the selected first or second interval.