WLAN Frame Transmission via Interference Station Classification
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Solution Overview
Problem
The performance of WLAN systems is degraded due to exposed node and blocked node states, where nodes cannot transmit frames efficiently due to interference and channel access issues, leading to reduced transmission capacity.
Innovation Solution
A method is introduced to generate interference/non-interference station lists, where stations are classified based on their response times, allowing for optimized frame transmission by determining whether a station is an interference or non-interference node, and adjusting channel access times to prevent collisions and ensure channel idle states.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If stations wait for response frames from all nodes before transmitting, then transmission reliability is improved, but transmission time is increased
Solution Approach 1:
The patent applies preliminary action by having stations transmit probe request frames and wait for response frames from potential interference nodes before initiating actual data transmission. This preliminary checking phase allows stations to identify and avoid interfering nodes in advance, ensuring reliable transmission without requiring continuous waiting during the transmission process itself.
Solution Approach 2:
The patent implements dynamics by allowing stations to adapt their transmission behavior based on real-time detection of response frames. Stations dynamically adjust whether to proceed with transmission or delay it, depending on whether response frames are received within expected time windows, creating a flexible and responsive transmission control mechanism.
2Productivity
If stations transmit without checking for interference, then transmission speed is improved, but interference increases
Solution Approach 1:
The patent applies feedback by having stations listen for response frames from potential interference nodes after transmitting probe request frames. The presence or absence of these response frames provides feedback information that stations use to determine whether to proceed with data transmission, thereby avoiding interfering nodes while maintaining high transmission speed.
Solution Approach 2:
The patent uses probe request and response frames as intermediary signals to mediate between transmitting stations and potential interference nodes. These intermediary frames enable stations to gather information about the transmission environment without actually transmitting data, allowing interference avoidance while maintaining transmission efficiency.
3Ease of operation
If stations use fixed transmission timing, then channel access is simplified, but transmission capacity is reduced
Solution Approach 1:
The patent implements dynamics by replacing fixed transmission timing with adaptive timing based on detected response frames. Stations adjust their transmission timing dynamically according to whether response frames are received within expected time windows, allowing multiple stations to transmit simultaneously without interference while maintaining relatively simple channel access procedures.
Data Source
AI summary
Disclosed are a method for transmitting and receiving a frame in a wireless local area network (WLAN) system and an apparatus for the same. A method for generating interference/non-interference station lists includes receiving a first frame from a second station, acquiring a receiver address of the first frame from the first frame, and setting, based on whether to receive a second frame that is a response to the first frame from a third station indicated by the receiver address within a preset time from a time when the first frame has been received, the third station as an interference station or a non-interference station. Therefore, the performance of a communication system may be improved.