WLAN Channel Slice Allocation for Concurrent OFDMA Access
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Solution Overview
Problem
In wireless local area networks (WLANs) with co-channel access points (APs), stations (STAs) associated with different APs cannot access channels simultaneously due to resource conflicts, even with orthogonal frequency division multiple access (OFDMA), leading to interference and reduced packet transmission quality.
Innovation Solution
A network device determines the packet concurrency status of multiple WLAN devices by analyzing decision-making region information and signal strength measurements to allocate identical channel resource slices to STAs that can concurrently transmit without interference, and different slices to those that cannot, ensuring timely access and quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If OFDMA is used to allocate channel resources to multiple STAs, then channel access efficiency is improved, but STAs associated with different co-channel APs still cannot access the channel simultaneously due to resource conflicts
Solution Approach 1:
The patent segments the channel resource into multiple resource units (RUs) and further divides them into sub-resource units. By allocating different sub-resource units to STAs from different co-channel APs, the system enables simultaneous channel access while avoiding conflicts. This segmentation approach transforms the traditional single-channel allocation into a multi-granularity resource allocation scheme.
Solution Approach 2:
The patent implements local quality differentiation by allowing STAs associated with different co-channel APs to access the same channel resource simultaneously under specific conditions (when their APs are in different contention states), while maintaining exclusive access for STAs associated with the same AP. This localized resource sharing strategy optimizes channel utilization without compromising transmission quality.
2Productivity
If the same channel resource is allocated to multiple STAs, then resource utilization is improved, but interference between transmissions increases
Solution Approach 1:
The patent employs feedback mechanisms where APs report their channel contention states to a central controller. Based on this feedback, the controller dynamically determines which STAs can share channel resources without causing harmful interference. STAs whose APs are in different contention states are allowed to use the same resource units, while those in the same contention state are allocated different resources.
Solution Approach 2:
The patent introduces a central controller as an intermediary that coordinates resource allocation among co-channel APs. This mediator collects contention state information from APs, makes intelligent decisions about resource sharing, and allocates sub-resource units accordingly, thereby enabling safe simultaneous transmissions without direct interference between STAs.
3Reliability
If channel resources are strictly allocated to avoid conflicts, then transmission quality is maintained, but channel access latency increases
Solution Approach 1:
The patent implements dynamic resource allocation where the channel access permissions and resource unit assignments change based on real-time contention states of co-channel APs. When APs are in different contention states, their STAs can simultaneously access the channel; when in the same state, exclusive access is granted. This dynamic approach reduces latency while maintaining transmission quality through adaptive control.
Data Source
AI summary
A resource allocation method, a device, and a storage medium are disclosed. The method includes: A network device obtains a packet concurrency status of a plurality of wireless local area network WLAN devices, where the plurality of WLAN devices correspond to a same channel. The network device allocates channel resource slices to the plurality of WLAN devices from a channel resource in a first time period based on the packet concurrency status.