Multi-Channel Frame Aggregation for Reliable WLAN Channel Bonding
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Solution Overview
Problem
Existing wireless LAN systems face challenges in performing channel bonding due to interference from other networks, leading to inefficient data transmission and reduced utilization of frequency channels, and frame aggregation technologies lack reliability in determining retransmission needs.
Innovation Solution
A communication device and method that multiplexes subframes in both time and frequency axes using multi-channel aggregation frames, allowing for channel bonding and frame aggregation to improve reliability and efficiency by adjusting transmission order and using continuation request signals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If channel bonding technology is applied to increase data transmission amount, then transmission capacity is improved, but reliability decreases due to interference from other networks on frequency channels
Solution Approach 1:
The transmission data is divided into multiple subframes and transmitted through multiple frequency channels simultaneously. Each subframe is an independent segment that can be received separately, allowing the system to maintain high throughput while improving reliability through diversity transmission across channels.
Solution Approach 2:
The system dynamically changes transmission parameters including frequency channel selection, transmission timing, and subframe configuration based on channel conditions. By adjusting these parameters, the system optimizes both transmission capacity and reliability adaptively.
2Productivity
If frame aggregation technology is used to transmit multiple subframes as one frame, then transmission efficiency is improved, but reliability decreases because it cannot ensure all subframes are received without error
Solution Approach 1:
The aggregated frame is segmented into multiple independent subframes that are transmitted across different frequency channels. This segmentation allows the receiver to collect subframes from multiple channels, improving reliability while maintaining the efficiency benefits of aggregation.
Solution Approach 2:
The system transitions from single-channel frame aggregation to multi-dimensional aggregation across both time and frequency axes. Subframes are arranged in a two-dimensional structure with multiple channels in the frequency dimension and multiple time slots in the time dimension, providing redundancy and improving reliability.
3Reliability
If the same data is transmitted multiple times using different timings and frequency channels to ensure high reliability, then reliability is improved, but transmission line utilization efficiency decreases
Solution Approach 1:
Multiple transmissions of the same data across different channels and timings are merged into a unified multi-channel aggregation frame structure. This merging eliminates redundant transmissions while maintaining reliability through intelligent subframe distribution across channels.
Solution Approach 2:
The system maintains continuous transmission across multiple channels simultaneously rather than repeating transmissions sequentially. By keeping all channels actively transmitting useful data continuously, the system achieves both high reliability and high channel utilization efficiency.
4Productivity
If channel bonding is performed using multiple frequency channels, then data transmission capacity is increased, but device complexity increases due to need for managing multiple channels
Solution Approach 1:
The communication device is designed with multi-functional capabilities to handle multiple frequency channels simultaneously. The same transmission and reception mechanisms are universally applied across all channels, reducing the need for channel-specific complex management logic.
Solution Approach 2:
The system manages multiple channels by organizing them in a structured two-dimensional framework (frequency × time), which simplifies the management complexity through systematic arrangement and regular patterns in subframe distribution across channels.
Data Source
AI summary
A communication device is provided that performs highly reliable data communication using a plurality of channels. The communication device includes: a generation unit that generates a transmission frame including an aggregation frame in which a sequence of subframes is multiplexed in a time axis direction and a frequency channel axis direction; and a transmission unit that wirelessly transmits the transmission frame. The generation unit generates the aggregation frame aggregated to cause each of the subframes included in the sequence to be stored at least once in each of frequency channels, and arranges in the aggregation frame at least one slot for receiving a continuation request signal.