Multi-Link Access Point Channelization for Inter-Band Isolation
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Solution Overview
Problem
Current dynamic channel assignment algorithms for multi-link devices (MLDs) do not consider inter-frequency band interference, leading to potential receiver saturation and interference between radios operating in different frequency bands.
Innovation Solution
A system that includes a processor and memory configured to identify types of MLDs associated with access points, generate MLD distributions, and assign channels based on frequency separation constraints to mitigate inter-band frequency contention, considering inter-frequency band links and intra-band spectrum isolation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If dynamic channel assignment algorithms are used for MLDs, then channel utilization is improved, but inter-frequency band interference occurs causing receiver saturation
Solution Approach 1:
The system applies preliminary anti-action by proactively identifying and preventing inter-frequency band interference before it causes receiver saturation. The AP calculates frequency separation constraints based on MLD capabilities and pre-determines safe channel assignments that avoid harmful interactions between different frequency bands, thereby maintaining high channel utilization without causing interference.
Solution Approach 2:
The system dynamically adjusts channel assignment parameters based on MLD capabilities and current network conditions. By changing the frequency separation parameter according to specific MLD types (MLMR STR, MLSR, etc.), the system optimizes channel utilization while preventing interference. The frequency separation constraint is modified based on the least common multiple of channel widths and MLD-specific requirements.
2Reliability
If frequency separation is enforced between radios, then receiver saturation is prevented, but channel assignment flexibility is reduced
Solution Approach 1:
The system implements dynamic frequency separation constraints that adapt to different MLD types and operational modes. Instead of applying a fixed frequency separation rule, the AP dynamically calculates appropriate separation based on whether the MLD is MLMR STR, MLMR non-STR, or MLSR, and adjusts constraints based on channel widths and current assignments. This maintains reliability while preserving flexibility.
Solution Approach 2:
The system applies different frequency separation requirements to different frequency bands and MLD types locally. Each MLD receives customized frequency separation constraints based on its specific capabilities and the local network conditions in each frequency band, rather than applying a uniform global constraint. This allows optimal channel assignment flexibility while ensuring receiver protection where needed.
3Device complexity
If inter-frequency band inference is not considered in channel assignment, then assignment complexity is reduced, but interference between frequency bands increases
Solution Approach 1:
The system performs preliminary action by calculating and storing frequency separation constraints before actual channel assignment occurs. The AP pre-determines the least common multiple of channel widths for different bands and establishes frequency separation rules based on MLD capabilities in advance. This preliminary preparation simplifies the actual assignment process while ensuring interference is prevented.
Solution Approach 2:
The system introduces frequency separation constraints as an intermediary mechanism that mediates between channel assignment decisions and interference prevention. Rather than directly complex calculations during assignment, the pre-calculated frequency separation constraints act as a simplified intermediary guide that ensures interference-free assignments while reducing algorithmic complexity.
Data Source
AI summary
Embodiments herein describe techniques for performing dynamic channel assignment for MLD stations using MLD distributions associated with access points (APs). The embodiments herein include techniques for considering inter-frequency isolation (also referred to as inter-spectrum isolation) as well as intra-frequency contention when assigning channels to MLDs.