Wireless Interface ECN Marking for Congestion Detection
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Solution Overview
Problem
Wireless networks often experience congestion without effective explicit congestion notification (ECN) on wireless network interfaces, leading to dropped packets and degraded link quality, particularly in ECN-capable endpoints.
Innovation Solution
Implementing ECN marking and signaling techniques on wireless network interfaces, such as the Uu interface, by user equipment (UE) and network nodes to detect and indicate congestion status, allowing for ECN-capable communication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If ECN marking and signaling techniques are implemented on wireless network interfaces, then communication performance is improved and packet drops are reduced, but device complexity and processing overhead increase
Solution Approach 1:
The patent applies preliminary action by pre-configuring ECN marking criteria and thresholds in the UE before actual congestion occurs. The network entity provides ECN marking criteria that include thresholds for packet error rate, latency, and resource utilization. When these pre-set conditions are met during operation, the UE can immediately mark packets with ECN information without requiring complex real-time analysis, thus improving reliability while keeping processing complexity manageable.
2Measurement precision
If ECN status detection and marking is performed based on multiple criteria, then congestion detection accuracy is improved, but processing time and computational resources increase
Solution Approach 1:
The patent implements partial action by selectively applying ECN marking based on prioritized criteria. The UE evaluates multiple congestion indicators (packet error rate, latency, resource utilization) but applies marking thresholds that focus on the most critical conditions first. The network entity configures specific marking criteria that allow the UE to make accurate congestion detection decisions without exhaustively processing all possible parameters, thus maintaining detection accuracy while reducing processing time.
3Productivity
If ECN information is marked on IP packets and transmitted to network entities, then network congestion management is improved, but overhead and resource consumption increase
Solution Approach 1:
The patent applies local quality by implementing ECN marking at specific strategic points in the network rather than universally. The UE marks packets with ECN information locally based on its own congestion conditions and the pre-configured criteria received from the network entity. This localized approach allows congestion management to be effective where needed without requiring all network nodes to perform complex ECN processing, thus improving overall network productivity while minimizing energy consumption.
Data Source
AI summary
Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may receive an internet protocol (IP) packet. The UE may identify a quality of service (QOS) flow associated with the IP packet. The UE may detect an uplink explicit congestion notification (ECN) status associated with the QoS flow based at least in part on header information associated with the IP packet. The UE may transmit an indication of the uplink ECN status to a core network entity. The UE may perform one of: marking the IP packet with uplink ECN information based at least in part on uplink ECN criteria, or transmitting, to a radio access network (RAN) network entity, an indication that at least one of the uplink ECN criteria is met or that none of the uplink ECN criteria is met. Numerous other aspects are described.