Dynamic Frame-Merging Scheme Selection for Mesh Networks
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Solution Overview
Problem
Existing frame-merging schemes for wireless networks are inefficient in handling channel fluctuations, leading to suboptimal throughput and channel efficiency due to fixed merging methods that do not adapt to varying transmission conditions.
Innovation Solution
A dynamic frame-merging method that selects among A-MSDU, A-MPDU, and A-PPDU schemes based on bit error rate, communication pair, and transmission mode to determine the most suitable scheme for each communication pair, allowing for adaptive frame aggregation and transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single frame-merging scheme (A-MSDU, A-MPDU, or A-PPDU) is used, then the system achieves simplicity in implementation, but the throughput and channel efficiency deteriorate under varying channel conditions
Solution Approach 1:
The patent implements a dynamic frame-merging scheme selection mechanism that adapts to varying channel conditions. The system monitors channel quality indicators (such as signal-to-noise ratio, bit error rate, or channel state information) and dynamically selects the most appropriate frame-merging scheme (A-MSDU, A-MPDU, or A-PPDU) based on current channel state. This dynamic adaptation resolves the contradiction by allowing the system to maintain simple implementation for each individual scheme while achieving high throughput through intelligent scheme selection across different channel conditions
Solution Approach 2:
The patent changes the operational parameters of the frame-merging system by introducing multiple merging schemes with different characteristics and dynamically switching between them. Each scheme has different overhead structures and error propagation characteristics, and the system selects the optimal scheme based on channel parameters such as error rate and signal quality. This parameter-based selection resolves the contradiction by optimizing throughput for each specific channel condition while maintaining implementation simplicity through standardized scheme options
2Loss of energy
If A-MSDU is used for frame merging, then overhead is reduced and channel efficiency is improved in ideal channels, but reliability deteriorates because damage to one MSDU causes re-transmission of all MSDUs
Solution Approach 1:
The patent dynamically selects between A-MSDU and other frame-merging schemes based on channel reliability indicators. When channel conditions are ideal (low error rate), the system selects A-MSDU to minimize overhead and maximize channel efficiency. When channel conditions deteriorate (higher error rate), the system switches to alternative schemes that provide better error isolation and reliability. This dynamic selection resolves the contradiction by optimizing the trade-off between overhead and reliability according to actual channel conditions
Solution Approach 2:
The patent changes the frame-merging approach based on channel error rate parameters. For low-error channels, A-MSDU with its compact overhead structure is selected. For high-error channels, alternative merging schemes with better error containment characteristics are selected. This parameter-driven selection allows the system to achieve low overhead when possible while maintaining reliability when channel conditions require it
Data Source
AI summary
A frame-merging method is adapted for a network that includes mesh and terminal units, in which any two units capable of communication form a communication pair, and one of the units operates as a key unit to transmit pending frames according to the frame-merging method. The frame-merging method includes: determining whether the key unit is a mesh or a terminal unit; for the communication pair recorded in each pending frame, selecting a suitable scheme from a plurality of frame-merging schemes, and extracting at least one of the pending frames from among the pending frames for use as part or all of a priority frame set; and comparing a total size of all frames included in the priority frame set with a suitable frame size, so as to determine whether the key unit is to send an aggregated frame. A frame-merging apparatus is also disclosed.