Traffic Flow Compliance Control for Wireless Latency
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Solution Overview
Problem
Current wireless communication networks face challenges in hosting low-latency services due to latency spikes and jitter caused by congestion, which existing techniques struggle to address effectively, especially when non-compliant traffic flows consume excessive radio resources.
Innovation Solution
A controller is implemented to monitor and manage traffic flows by determining compliance with recommended bitrates, performing mitigating actions such as packet discarding or scheduling priority adjustments to ensure compliant behavior, thereby protecting the system from non-compliant flows and reducing congestion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If L4S traffic flows are given higher scheduling priority to achieve low latency, then latency is reduced, but non-compliant flows may consume excessive radio resources causing congestion
Solution Approach 1:
The patent implements a feedback mechanism where the network monitors the actual bitrate of L4S traffic flows against recommended bitrates. When non-compliance is detected (actual bitrate exceeds recommended bitrate), the network sends feedback signals to the application server to adjust the traffic flow, thereby preventing excessive resource consumption while maintaining priority scheduling
Solution Approach 2:
The patent introduces dynamic compliance verification that continuously monitors traffic flow behavior. The scheduling priority and resource allocation are dynamically adjusted based on compliance status - compliant flows maintain high priority, while non-compliant flows have their priority reduced or are throttled, allowing the system to adapt to changing traffic conditions
2Loss of time
If congestion marking is used to signal applications to lower throughput, then latency spikes are reduced, but non-compliant applications may not respond causing continued resource exhaustion
Solution Approach 1:
The patent introduces an intermediary compliance verification mechanism between the congestion marking system and the application server. This intermediary monitors whether applications actually respond to congestion markings by verifying if their throughput is reduced as expected. If applications fail to comply, the intermediary takes additional control actions to enforce throughput reduction
Solution Approach 2:
The patent performs preliminary compliance verification before allowing L4S traffic to proceed with high priority scheduling. By checking whether applications have the capability and willingness to respond to congestion signals in advance, the system prevents non-compliant applications from causing congestion in the first place
3Reliability
If dedicated bearers are set up for L4S traffic to differentiate from MBB traffic, then low-latency service quality is improved, but system complexity increases
Solution Approach 1:
The patent makes the compliance verification and monitoring mechanism universal, applicable to all L4S traffic flows regardless of their specific bearer configuration. The same compliance verification logic and feedback mechanisms are used across different bearer types, reducing the need for separate complex management systems for each bearer type
Data Source
AI summary
There is provided mechanisms for handling a traffic flow in a wireless communication system. A method is performed by a controller. The method comprises monitoring a traffic flow on a bearer between an application server and a user equipment in the wireless communication system. The traffic flow is scheduled by a scheduler. The method comprises determining whether or not the traffic flow fulfils a compliance requirement. The compliance requirement pertains to a recommended bitrate is maintained for the traffic flow. The method comprises performing a mitigating action for the traffic flow when the traffic flow fails to fulfil the compliance requirement.