Multi-Link Admission Control for Wireless Channel Usage Limits
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Solution Overview
Problem
Current Wi-Fi technologies face challenges in managing access to the wireless medium efficiently, leading to collisions and inadequate control over channel usage, particularly when multiple stations contend for access simultaneously.
Innovation Solution
Implementing admission control mechanisms in wireless networks, which set usage limits and prioritize access categories like best effort, voice, and video, by using Enhanced Distributed Channel Access (EDCA) and Traffic Specification (TSPEC) elements to manage medium access time, ensuring that stations do not exceed predefined channel usage time limits.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If DCF uses carrier-sense multiple access with collision avoidance (CSMA/CA) techniques and binary exponential backoff algorithm, then stations can access the wireless medium, but collisions still occur when multiple stations contend for access simultaneously
Solution Approach 1:
The patent applies preliminary action by performing admission control before actual medium access. The system pre-calculates and allocates medium access time parameters to stations based on their QoS requirements, ensuring that stations with granted admission control can transmit without contention. This prevents collisions by reserving channel access in advance rather than relying on backoff mechanisms during actual transmission attempts.
2Productivity
If more control over access to the wireless medium is implemented, then channel usage can be managed better, but device complexity increases
Solution Approach 1:
The patent applies parameter changes by introducing specific QoS parameters (medium access time, admission control parameters) that can be dynamically adjusted based on traffic requirements. The system modifies channel access parameters for different stations and access categories, allowing flexible control over channel usage without requiring complete redesign of the access mechanism. This enables efficient channel management through parameter optimization rather than structural complexity.
3Loss of time
If admission control is enabled to set usage limits for wireless devices, then channel usage time can be limited, but network device complexity increases
Solution Approach 1:
The patent applies feedback by continuously monitoring channel usage time and comparing it against allocated limits. The admission control mechanism tracks the actual medium access time for each station and provides feedback when limits are approached or exceeded. This enables dynamic adjustment of channel access permissions, ensuring that stations do not exceed their allocated time while maintaining simple control logic through continuous monitoring and comparison.
Data Source
AI summary
Embodiments of the present invention provide methods and devices for performing admission control in a wireless network. Admission control can be used to set usage limits for wireless devices in the network. When admission control is enabled, a wireless station does not transmit frames if the current channel usage time is greater than a predefined time limit. The admission control parameters can be specific to an access category (AC), such as best effort (BE), voice (VO), video (VI), and background (BK). According to some implementations, the admission control is performed on a link-level. According to other implementations, the admission control is performed at a multi-link device (MLD) level.