Dynamic Multi-Band Layer-1 Aggregation in WLAN
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Solution Overview
Problem
Wireless local area networks (WLANs) face challenges in efficiently utilizing resources due to multiple devices sharing bandwidth, with some devices limited by communication protocols or hardware bandwidth, and the need to operate with both new and legacy protocols, leading to suboptimal performance and response times.
Innovation Solution
The implementation of a radio architecture that enables layer-1 aggregation, allowing for dynamic switching between channels in different frequency bands to optimize channel usage, including multi-band layer-1 aggregation that synchronizes transmission across multiple bands once all channels become available, enhancing throughput and reducing latency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If devices share the same wireless resources, then network coverage is maintained, but bandwidth efficiency deteriorates due to resource contention
Solution Approach 1:
The patent segments the wireless transmission into multiple subframes that can be independently allocated to different frequency bands. Each subframe can be transmitted on a different band, allowing the system to divide the transmission task across multiple channels and improve bandwidth efficiency by utilizing available spectrum resources dynamically.
Solution Approach 2:
The patent implements dynamic channel allocation where the system can switch between different frequency bands based on real-time channel availability. The apparatus dynamically selects which bands to use for transmission in each subframe, adapting to changing wireless conditions to optimize throughput while managing channel complexity through automated decision-making.
2Productivity
If dynamic multi-band switching is implemented, then throughput is improved, but transmission reliability deteriorates due to channel availability variability
Solution Approach 1:
The patent merges multiple frequency bands into a unified transmission system where subframes can be distributed across available bands. By combining resources from multiple bands and transmitting aggregated data, the system achieves higher throughput while maintaining reliability through diverse transmission paths that can compensate for individual band failures.
Solution Approach 2:
The patent changes transmission parameters dynamically by adjusting which frequency bands are active for transmission in each subframe. The system modifies transmission parameters such as band selection, subframe allocation, and aggregation levels based on channel conditions, enabling adaptive optimization of both throughput and reliability.
3Productivity
If layer-1 aggregation is used, then resource utilization is improved, but device complexity increases due to multi-band coordination requirements
Solution Approach 1:
The patent performs preliminary channel assessment and band selection before transmission begins. The apparatus evaluates channel availability across multiple bands in advance and pre-determines the optimal band allocation for upcoming subframes, reducing the coordination complexity during actual transmission by having decisions made beforehand.
Solution Approach 2:
The patent implements self-service mechanisms where the wireless device autonomously manages its own multi-band coordination without requiring complex external control. The apparatus automatically monitors channel conditions, selects appropriate bands, and manages subframe allocation independently, reducing the overall system complexity while maintaining high resource utilization.
Data Source
AI summary
Embodiments of an access point (AP), station (STA), and method of communication are generally described herein. The AP may perform channel sensing in a first channel of a first frequency band and a second channel of a second frequency band to obtain access for transmission of a physical layer convergence procedure (PLCP) protocol data unit (PPDU) that comprises multiple subframes. The transmission of the PPDU may be configurable to use a multi-band layer-1 aggregation of the first and second channels. While the second channel is unavailable, the AP may transmit one or more subframes on the first channel without usage of the multi-band layer-1 aggregation. When it is determined that the second channel has become available, the AP may switch to synchronized transmission of the subframes on the first and second channels in accordance with the multi-band layer-1 aggregation.