OFDMA Resource Allocation for Multi-Standard Interference
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Solution Overview
Problem
The integration of communication devices conforming to different IEEE 802.11 standards, such as IEEE 802.11ax and IEEE 802.11be, in the same frequency band leads to interference, resulting in communication failures and reduced frequency utilization efficiency.
Innovation Solution
A communication device that supports both IEEE 802.11ax and IEEE 802.11be standards using OFDMA, performs resource allocation processing by identifying overlapping frequency resources and allocating non-overlapping resources to prevent interference between devices conforming to different standards.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple communication standards (IEEE 802.11ax and IEEE 802.11be) operate in the same frequency band, then communication versatility is improved, but interference between standards occurs leading to communication failures
Solution Approach 1:
The frequency band is segmented into multiple sub-bands or resource units, and different communication standards are assigned to different segments. This allows multiple standards to operate simultaneously without interference while maintaining frequency utilization efficiency.
Solution Approach 2:
Different frequency resources are allocated with different allocation patterns suitable for each communication standard. IEEE 802.11ax devices receive resources allocated according to ax patterns, while IEEE 802.11be devices receive resources allocated according to be patterns, ensuring each standard operates with optimal local resource characteristics.
2Productivity
If different allocation patterns are used for different communication standards, then frequency utilization efficiency is improved, but resource allocation complexity increases
Solution Approach 1:
The access point performs preliminary resource allocation processing by identifying overlapping resources between different standards and adjusting allocations in advance. This preliminary action prevents interference before communication occurs, maintaining efficiency while managing complexity through centralized control.
Solution Approach 2:
The access point acts as an intermediary that manages resource allocation between different communication standards. It receives communication requests, performs allocation processing considering multiple patterns, and assigns appropriate frequency resources to each device, simplifying the overall system complexity through centralized mediation.
Data Source
AI summary
A communication device that supports first and second communication standards using an OFDMA (Orthogonal Frequency Division Multiple Access) technique allocates, based on a frequency resource that has been allocated for a first other communication device in accordance with the first communication standard that uses a first pattern for allocating a frequency resource, a frequency resource for a second other communication device that conforms to the second communication standard that uses a second pattern for allocating a frequency resource. The communication device specifies, from among frequency resources in the second pattern, a second frequency resource that partially or entirely overlaps with a first frequency resource that has been allocated to the first other communication device, and allocates a frequency resource that are not included in the second frequency resource in the second pattern to the second other communication device.