Radio Link Control PDU Prioritization for Timer-Sensitive Delivery
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing communication networks face inefficiencies in managing the prioritization of radio link control (RLC) protocol data units (PDUs), leading to unnecessary discarding of PDCP SDUs due to discard timers, which wastes network resources, increases latency, and negatively impacts user experience.
Innovation Solution
The implementation of prioritization mechanisms within the RLC layer to identify and prioritize delay-critical RLC PDUs, including retransmission over initial transmission, based on discard timers and PDU set importance, ensuring efficient handling of delay-sensitive data.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If RLC PDUs are transmitted without prioritization, then the transmission process is simple, but delay-critical data is discarded due to timer expiry leading to increased latency and reduced reliability
Solution Approach 1:
The patent applies preliminary action by assigning priority levels to RLC PDUs before transmission based on their delay sensitivity. The RLC layer identifies delay-critical PDUs and marks them with higher priority indicators in advance, ensuring they are transmitted first when resources are available, thus preventing timer expiry and data loss without adding complex real-time decision-making mechanisms.
Solution Approach 2:
The patent implements local quality by differentiating the treatment of individual RLC PDUs based on their specific delay requirements. Instead of uniform transmission, each PDU is assigned a priority level (e.g., high, medium, low) based on its associated QoS parameters and delay budget, allowing the system to apply appropriate transmission strategies to each PDU locally while maintaining overall system simplicity.
2Loss of time
If prioritization mechanisms are implemented to handle delay-critical data, then latency is reduced and reliability improves, but the RLC layer complexity increases
Solution Approach 1:
Priority indicators are assigned to RLC PDUs in advance during the packetization process, based on QoS parameters and delay budgets from upper layers. This preliminary classification eliminates the need for complex real-time priority decisions during transmission, reducing latency while keeping the prioritization mechanism simple and manageable.
Solution Approach 2:
The patent changes the parameter of priority indication by introducing simple priority levels (high, medium, low) derived from QoS parameters and delay budgets. This parameter transformation converts complex QoS requirements into straightforward priority markers that can be easily processed by the RLC layer, reducing computational complexity while effectively managing transmission latency.
3Loss of energy
If all RLC PDUs are treated equally, then the processing is straightforward, but network resources are wasted due to unnecessary discarding of delay-sensitive data
Solution Approach 1:
The patent applies local quality by treating each RLC PDU differently based on its delay sensitivity characteristics. PDUs are classified into priority levels according to their QoS requirements, allowing the system to focus network resources on delay-critical data while using simpler handling for non-critical data, thus improving resource efficiency without significantly complicating processing.
Solution Approach 2:
Priority classification is performed in advance during PDU generation, marking delay-sensitive PDUs with high priority indicators before they enter the transmission queue. This preliminary action ensures that network resources are efficiently allocated to critical data without requiring complex real-time analysis, maintaining processing simplicity while reducing resource waste.
Data Source
AI summary
The present application relates to devices and components including apparatus, systems, and methods for prioritization and scheduling of radio link control (RLC) protocol data units (PDUs).