Non-Continuous Channel Bonding for Wireless LAN Throughput
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Solution Overview
Problem
Next-generation wireless local area networks (WLANs) face challenges in improving spectrum efficiency and area throughput, especially in dense environments with multiple access points and stations, and outdoor settings, where existing technologies struggle to enhance performance and efficiency.
Innovation Solution
The proposed method involves Non-Continuous Channel Bonding (NCCB) in a wireless LAN system, where an access point transmits data using High Efficiency Multi User (HE MU) PPDU with specific signal fields to bond non-continuous bandwidths, allowing for wider bandwidth transmission and increased channel efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If continuous channel bonding is used in existing WLAN systems, then channel continuity is maintained, but spectrum efficiency and area throughput are insufficient in dense environments
Solution Approach 1:
The patent applies segmentation by dividing the continuous channel into non-contiguous channel segments (e.g., 36-48 MHz and 60-72 MHz within an 80 MHz bandwidth). This allows the system to bond discrete frequency segments rather than requiring continuous spectrum, thereby improving spectrum efficiency and area throughput in dense environments where continuous channels are scarce or interfered with.
Solution Approach 2:
The patent introduces a new dimension to channel bonding by transitioning from continuous bandwidth allocation to non-contiguous segment allocation. This dimensional change in channel structure enables more flexible spectrum utilization, allowing multiple stations to share the bandwidth more efficiently and improving overall system productivity in dense deployments.
2Productivity
If non-continuous channel bonding is implemented, then spectrum efficiency and area throughput are improved, but channel allocation complexity increases
Solution Approach 1:
The patent introduces the AP (access point) as an intermediary that centralizes the channel allocation decisions. The AP determines which non-contiguous channel segments are allocated to which stations based on local conditions, shielding the stations from the complexity of channel bonding mechanisms. This intermediary approach allows improved channel efficiency while managing allocation complexity at the network coordination level rather than at the station level.
Solution Approach 2:
The patent changes the fundamental parameter of channel allocation from continuous bandwidth to non-contiguous segment bandwidth. By defining channels in terms of frequency segments rather than continuous ranges, the system achieves higher spectral efficiency while the allocation mechanism remains manageable through standardized segmentation rules and AP coordination.
3Productivity
If wider bandwidth is allocated to increase throughput, then area throughput improves, but compatibility with existing 802.11ax systems is compromised
Solution Approach 1:
The patent segments the wider bandwidth into standardized frequency segments (e.g., 20 MHz, 40 MHz, 80 MHz blocks) that can be independently allocated and bonded. This segmentation approach allows the system to achieve wide bandwidth throughput while maintaining compatibility with existing 802.11ax standards, as each segment can be transmitted using recognized modulation and encoding schemes, and the segmentation itself follows standard frequency divisions.
Solution Approach 2:
The patent applies partial action by implementing NCCB in a controlled manner within the 802.11ax framework rather than requiring full deployment of new standards. The system provides enhanced throughput capabilities where beneficial while maintaining fallback compatibility with standard continuous channel operation, allowing gradual adoption and ensuring backward compatibility with existing devices and networks.
Data Source
AI summary
Proposed are a method and an apparatus for transmitting data in a wireless LAN system. Particularly, an AP transmits a PPDU to one STA. The AP transmits data to the one STA over a first NCCB band or a second NCCB band on the basis of the PPDU. The PPDU includes a first signal field and a second signal field. The first NCCB band is a 40 MHz or 60 MHz band generated by bonding a discontinuous 20 MHz band in an 80 MHz band. The second NCCB band is an 80 MHz, 100 MHz, 120 MHz, or 140 MHz band generated by bonding a discontinuous 20 MHz band in a 160 MHz band. The first signal field includes first information and second information. The first information is NCCB indication information on whether or not an NCCB can be performed. The second information is NCCB bandwidth information for a band to be used for transmitting the PPDU from the first NCCB band and the second NCCB band.