RAN Congestion Detection via Queue Reporting for L4S Services
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Wireless communication networks face inefficiencies in detecting and communicating Radio Access Network (RAN) congestion, particularly for Low Latency, Low Loss, Scalable (L4S) services, due to the high cost and impracticality of existing congestion detection systems like Explicit Congestion Notification (ECN).
Innovation Solution
A method involving a wireless access node that measures downlink data transmission queue status, generates a queue report, and wirelessly transfers it to a user device, which then sends uplink signaling to a congestion control application server, enabling effective congestion control in RANs for L4S services.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If existing congestion detection systems like ECN are implemented, then congestion detection accuracy is improved, but system cost and complexity increase significantly
Solution Approach 1:
The patent replaces expensive, complex ECN systems with simple queue status measurements and basic reporting mechanisms. The access node monitors queue status using straightforward metrics (queue depth, transmission rate comparisons) and sends simple reports to user devices, which then convey congestion information to servers. This disposable-like simplicity eliminates the need for complex ECN infrastructure while maintaining effective congestion detection.
2Reliability
If ECN is deployed across the large number of RANs, then congestion detection capability is improved, but implementation cost becomes prohibitive
Solution Approach 1:
The access node performs self-service congestion detection by autonomously measuring its own queue status and generating reports without requiring external ECN infrastructure. The user device then self-services the congestion information transmission by sending queue report indications to the server. This self-service approach eliminates deployment costs across RANs while maintaining reliable congestion detection capability.
3Ease of manufacture
If simple queue status reporting is used, then system cost is reduced, but congestion detection effectiveness for L4S services may be insufficient
Solution Approach 1:
The patent implements a feedback loop where the access node continuously measures queue status, sends reports to the user device, which then transmits congestion information to the server. The server uses this feedback to adjust data transmission rates dynamically, ensuring L4S service requirements are met. This feedback mechanism compensates for the simplicity of the reporting system by enabling precise congestion-responsive rate adaptation.
Data Source
AI summary
Various embodiments comprise a wireless access node to inhibit access point data congestion. In some examples, the wireless communication network comprises node circuitry and radio circuitry. The radio circuitry wirelessly exchanges user data with a wireless user device for a low latency data service. The node circuitry exchanges the user data with a network user plane. The node circuitry measures a queue status for downlink data transmission to the wireless user device. The node circuitry generates a queue report that indicates the queue status. The radio circuitry wirelessly transfers the queue report to the wireless user device. The wireless user device receives the queue report and wirelessly transfers uplink signaling indicating the queue report to the wireless access node for delivery to a congestion control application server.