Broadcast Traffic Scheduling With Threshold-Based WLAN Queues
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Solution Overview
Problem
Existing wireless communications systems face challenges in efficiently scheduling broadcast traffic across multiple radio access technologies, leading to delays and poor user experience due to bottlenecks in local area networks, particularly when multicast and broadcast services are delay-sensitive.
Innovation Solution
A method where a wide area network modem provides MBS information to a local area network scheduler, establishing separate background access category queues and using threshold values to prioritize and manage broadcast traffic, ensuring appropriate quality of service.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If broadcast traffic is transmitted through WLAN scheduler without separate queue management, then network simplicity is maintained, but delay sensitivity of multicast and broadcast services deteriorates
Solution Approach 1:
The patent segments broadcast traffic into a separate background access category queue distinct from unicast traffic queues. This segmentation allows the scheduler to independently manage broadcast traffic parameters (such as delay sensitivity and priority) without being constrained by unicast traffic scheduling decisions, thereby reducing broadcast traffic delay while maintaining overall scheduler functionality.
2Adaptability or versatility
If broadcast data is transmitted to all UEs regardless of solicitation status, then service coverage is maximized, but network resource efficiency deteriorates
Solution Approach 1:
The patent implements dynamic transmission decisions based on real-time queue threshold monitoring. When broadcast queue occupancy exceeds a predefined threshold, the system adaptively switches between transmission modes: transmitting only to solicited UEs when resources are constrained, and transmitting to all UEs when resources are abundant. This dynamic adjustment optimizes network resource efficiency while maintaining service coverage flexibility.
3Reliability
If queue threshold management is implemented for broadcast traffic, then quality of service is improved, but scheduling complexity increases
Solution Approach 1:
The patent manages scheduling complexity by monitoring and adjusting a key parameter - the queue occupancy threshold - rather than implementing complex multi-dimensional scheduling algorithms. The threshold parameter dynamically controls transmission decisions, enabling QoS guarantees through simple threshold-based triggers that compare current queue occupancy against predefined limits, thus maintaining reliability while avoiding excessive scheduling complexity.
4Productivity
If broadcast transmissions are discontinued when queue exceeds threshold, then resource allocation efficiency is improved, but service continuity deteriorates
Solution Approach 1:
The patent implements a feedback mechanism where the scheduler continuously monitors broadcast queue occupancy and compares it against threshold values. When the threshold is exceeded, feedback triggers a transmission suspension to solicited UEs while maintaining transmission to unsolicited UEs. This feedback-based control ensures resource allocation efficiency by pausing non-critical transmissions while preserving service continuity through alternative transmission paths.
Data Source
AI summary
Methods, systems, and devices for wireless communications are described that provide for broadcast communications that originate at a wide area network to be provided to a local area network (LAN), that uses a different radio access technology, to complete the broadcast communications to a user equipment (UE). A device that receives the broadcast communications, such as a customer premises equipment (CPE) may decode broadcast data from the broadcast communications and provide the broadcast data to a LAN scheduler along with one or more parameters associated with the broadcast data. The LAN scheduler may establish a separate background access category (AC) queue for the broadcast data, and may transmit data from the broadcast AC queue based on one or more threshold values.