Medium Access Group Assignment for Wireless Networks
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Solution Overview
Problem
Wireless communication networks face network congestion and instability due to collisions among multiple stations contending for media access and large traffic indication maps that waste medium time, particularly in IEEE 802.11 standards.
Innovation Solution
Implementing medium access group assignment, where access points collaborate to allocate non-overlapping beacon intervals and assign stations to specific groups, allowing only designated stations to transmit or receive during configured intervals, thereby compressing traffic indication maps and reducing collisions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple stations contend for media access simultaneously in a basic service set, then network coverage and connectivity are improved, but collisions occur and network stability deteriorates
Solution Approach 1:
The patent segments the basic service set into multiple medium access groups (MAGs), where each MAG is assigned to a specific beacon interval. This segmentation allows stations to be organized into groups that access the medium at different times, reducing collisions while maintaining comprehensive network coverage across all stations.
2Loss of information
If the access point includes all stations in the traffic indication map, then complete traffic information is provided, but the beacon frame becomes overly bloated and wastes medium time
Solution Approach 1:
The traffic indication map is segmented by creating separate compressed TIM elements for each medium access group. Instead of including all stations in a single TIM element, the patent divides the TIM into multiple smaller elements, each containing only the stations assigned to that specific beacon interval. This segmentation reduces the size of each TIM element while maintaining complete traffic information for each group.
Solution Approach 2:
The patent introduces a new dimension of organization by grouping stations into medium access groups and assigning them to specific beacon intervals. This dimensional change allows the TIM to be structured hierarchically, with each beacon interval having its own compressed TIM element containing only relevant stations, thereby reducing overall beacon frame size while preserving traffic information completeness.
3Reliability
If stations are assigned to specific medium access groups with designated beacon intervals, then collisions are reduced and network stability improves, but device complexity increases due to group management
Solution Approach 1:
The patent segments the station population into medium access groups and assigns each group to specific beacon intervals. This segmentation simplifies the access control mechanism by allowing stations to only monitor and contend for media during their designated beacon intervals, rather than managing complex real-time arbitration for all stations simultaneously. The group-based structure reduces the complexity of medium access coordination.
4Quantity of substance
If the access point serves a large number of stations, then network capacity and coverage are improved, but network congestion increases and performance deteriorates
Solution Approach 1:
The patent segments the large population of stations into multiple medium access groups, with each group assigned to specific beacon intervals. This segmentation allows the access point to serve a large number of stations by distributing them across multiple time slots, thereby maintaining network performance. Each group experiences reduced contention and congestion during its designated beacon interval, enabling the network to scale to support more stations without proportional performance degradation.
Data Source
AI summary
Systems and methods for implementing a medium access group assignment of stations (STAs) are disclosed. An access point (AP) device may be configured to allocate a chosen beacon interval to a medium access group (MAG). Further, the AP device may assign STAs to different MAGs. After assignment to a particular MAG, the STAs that are associated to the particular MAG may use the configured beacon interval during transmission and reception of messages.