Access Point Resource Allocation for 802.11ah Stations
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Solution Overview
Problem
In wireless local area networks, especially with 802.11ah task group scenarios, there are challenges with high overhead, poor flexibility, and low system efficiency in resource allocation, particularly in coordinating data sending and reception between access and non-access stations, leading to increased collision risks.
Innovation Solution
The method involves an Access Point allocating resources for data transmission to Stations based on a resource granularity that includes preset time lengths and/or bandwidths, sending resource allocation information, and detecting idle channels to trigger data transmission, while using channel contention mechanisms to avoid collisions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If separate indication is performed for each STA's timeslot length in universal scenarios, then flexibility is improved, but indication overhead increases
Solution Approach 1:
The patent segments STAs into different groups (first group with similar service types, second group with different service types) and applies different resource allocation strategies to each group. For the first group, unified indication is used to reduce overhead, while for the second group, separate indication maintains flexibility. This segmentation resolves the contradiction by applying appropriate granularity to different STA subsets.
Solution Approach 2:
The patent applies different resource allocation indication methods to different local contexts: unified indication for STAs with similar service characteristics and separate indication for STAs with diverse service requirements. This local quality approach allows the system to optimize for overhead reduction where applicable while maintaining flexibility where needed.
2Reliability
If scheduling-based resource allocation is used in 802.11ah task group scenarios, then collision probability among hidden STAs is reduced, but system complexity increases
Solution Approach 1:
The patent segments the STA population into groups with similar service types and allocates unified timeslot resources to each group. This segmentation reduces the number of individual scheduling decisions needed, thereby reducing system complexity while maintaining the collision avoidance benefits of scheduled allocation within each group.
Solution Approach 2:
The patent merges resource allocation for multiple STAs with similar service characteristics into a single unified indication. By combining the resource allocation for the first group of STAs into one unified timeslot assignment, the system reduces complexity while still preventing collisions through the scheduled structure.
3Loss of information
If unified timeslot resource allocation is used for STAs with similar service types, then indication overhead is reduced, but flexibility for multi-antenna mode transmission is limited
Solution Approach 1:
The patent segments STAs into two groups: those with similar service types (first group) receiving unified allocation, and those with different service types (second group) receiving separate allocation. This segmentation allows the system to reduce overhead for the first group while preserving flexibility for the second group and for scenarios requiring multi-antenna mode transmission.
Solution Approach 2:
The patent implements dynamic resource allocation where the AP can flexibly adjust timeslot assignments based on actual service requirements. The unified timeslot resource for the first group can be dynamically allocated to different STAs within the group based on their actual data transmission needs, providing adaptability within the unified framework.
Data Source
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AI summary
Disclosed are a method and device for processing resource allocation information. The method includes that: an Access Point (AP) allocates resources for data transmission between the AP and one or more Stations (STA) in a STA group according to a resource granularity, wherein the resource granularity comprises a preset time length and/or a preset bandwidth (Step 302); and the AP sends resource allocation information for allocating the resources to the STA group (Step 304). By the present disclosure, the problems of high overhead, poor flexibility, low system efficiency and how to coordinate data sending and reception between an access STA and a non-access STA during the resource allocation for the STAs in the related art are solved, and the effects of reducing signalling resource overhead, ensuring high flexibility, effectively improving system efficiency, better coordinating data sending and reception between the access STA and the non-access STA and effectively avoiding a collision are further achieved.