WLAN Resource Allocation via Restricted Access Bandwidth and Window
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Solution Overview
Problem
Wideband WLAN systems face challenges in accommodating a large number of stations with diverse services while efficiently managing bandwidth, time, and power, particularly in reducing collisions and achieving power saving, especially when using restricted resources.
Innovation Solution
A resource allocation method and apparatus that determine a restricted access bandwidth interval and set a restricted access window in the time domain, allowing flexible frequency usage by transmitting information about these intervals to stations, enabling efficient data transmission without additional effort.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If wideband WLAN technology is used to extend coverage and accommodate more stations, then the number of supported stations and coverage area increase, but channel access collisions increase and resource management complexity increases
Solution Approach 1:
The patent divides the wideband channel into multiple sub-channels or frequency resources, and groups stations into different restricted access windows (RAWs) based on their service types and traffic characteristics. This segmentation allows simultaneous access by multiple stations without collisions by assigning them to different time-frequency resources.
Solution Approach 2:
The patent dynamically adjusts the restricted access window parameters (such as window size, timing, and frequency allocation) based on real-time network conditions, station types, and traffic demands. This dynamic adaptation optimizes resource allocation to minimize collisions while accommodating diverse station requirements.
2Use of energy by moving object
If restricted resources such as bandwidth, time, and power are used to achieve efficient power saving, then power consumption decreases, but resource allocation complexity and transmission rate may be limited
Solution Approach 1:
The patent applies different resource allocation strategies and restricted access window configurations to different station types and service categories. For example, power-saving stations receive different allocations compared to real-time service stations, optimizing power efficiency for each group without uniformly limiting all stations.
Solution Approach 2:
The patent changes key parameters such as RAW timing, frequency allocation, and modulation schemes based on power saving requirements and network conditions. By adjusting these parameters dynamically, the system achieves power efficiency while maintaining manageable allocation complexity through standardized parameter sets.
3Object-affected harmful factors
If grouped station access is implemented to reduce collisions and achieve power saving, then collision reduction and power efficiency improve, but system setup complexity and configuration overhead increase
Solution Approach 1:
The patent creates universal grouping mechanisms where stations are categorized into standard groups (e.g., by service type, traffic priority, or power saving mode) that can be applied across different network scenarios. This universal approach reduces configuration overhead by using standardized group definitions rather than custom configurations for each station.
Solution Approach 2:
The patent performs preliminary station grouping and restricted access window assignment during network initialization or registration phases. By pre-configuring groups and their associated RAW parameters before actual data transmission begins, the system reduces real-time configuration overhead and simplifies ongoing resource management.
Data Source
AI summary
Provided is a method and apparatus for allocating resources in a wireless local area network (WLAN) system, the method including determining a restricted access bandwidth (RAB) interval based on at least a bandwidth or a partial bandwidth among a plurality of bandwidths, and setting a restricted access window (RAW) of a time domain based on the RAB interval.