Wireless Communication Apparatus Retransmission Control
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Solution Overview
Problem
In wireless communication systems based on IEEE 802.11 standards, unnecessary data transmission and reception occur when a reception confirmation signal is not received, leading to inefficiencies in communication.
Innovation Solution
A wireless communication apparatus with a transmitting portion, receiving portion, determination portion, and control portion that dynamically processes signals by requesting retransmission of the reception confirmation signal only when specific conditions are met, such as reception strength thresholds, preamble detection, and error detection, to prevent useless data retransmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the transmitting apparatus retransmits the A-MPDU packet when BA is not received, then the probability of successful data delivery increases, but needless communication occurs reducing transmission efficiency
Solution Approach 1:
The transmitting apparatus monitors the reception of BA packets and uses this feedback to dynamically adjust its transmission strategy. When BA is received, normal transmission continues; when BA is not received, the system transitions to alternative actions (retransmission or BAR transmission), creating a feedback-driven adaptive communication protocol that resolves the contradiction between reliability and efficiency
Solution Approach 2:
The system dynamically changes its behavior based on reception conditions. Instead of a fixed retransmission protocol, the transmitting apparatus adapts its action (retransmit A-MPDU, transmit BAR, or transmit new A-MPDU) based on whether BA is received within the expected time period, allowing optimal performance under varying channel conditions
2Reliability
If the transmitting apparatus transmits BAR to request retransmission of BA, then acknowledgment reception is ensured, but useless data transmission occurs when data was already received
Solution Approach 1:
The system uses the absence of BA as feedback to trigger BAR transmission, creating a request-reponse mechanism that ensures acknowledgment reception only when necessary, avoiding energy waste from unnecessary BAR transmissions when data was successfully received
3Speed
If the transmitting apparatus transmits a new A-MPDU packet, then transmission continuity is maintained, but the receiving apparatus likely fails to receive it normally due to buffer issues
Solution Approach 1:
The system performs preliminary assessment by checking whether BA was received before deciding to transmit new data. This preliminary action prevents the receiving apparatus from entering a state where it cannot properly process new packets due to buffer issues, maintaining both transmission continuity and reception reliability
Data Source
AI summary
A wireless communication apparatus includes a transmitting portion to transmit a data signal to other wireless communication apparatus, a receiving portion to receive a reception confirmation signal indicating reception of the data signal by the other wireless communication apparatus from the other wireless communication apparatus during a specified period, a determination portion to determine that a predetermined requirement is satisfied if the receiving portion receives a given signal during the specified period, and a control portion to control the transmitting portion to request the other wireless communication apparatus to retransmit the reception confirmation signal if the receiving portion does not normally receive the reception confirmation signal and the determination portion determines that the predetermined requirement is satisfied.