Buffer Size Threshold for PDU Discard in Wireless UEs
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Wireless communication systems face challenges in managing traffic congestion, particularly when the bandwidth available to a user equipment (UE) becomes less than the data rate provisioned for its steady state traffic, leading to the need for protocol data unit (PDU) discard.
Innovation Solution
Implementing a method where a UE discards PDUs based on a buffer size threshold, rather than available bandwidth, to manage congestion. This approach involves receiving an indication of the buffer size threshold and discarding PDUs when the buffer size meets or exceeds this threshold, using criteria such as PDU set importance or remaining time.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the UE discards PDUs based on available bandwidth, then congestion management is achieved, but processing complexity and latency increase due to complex calculations
Solution Approach 1:
The patent changes the parameter used for PDU discard decision from available bandwidth to buffer size threshold. This parameter substitution simplifies the discard mechanism by using a directly measurable buffer size value instead of requiring complex bandwidth calculations, thereby reducing processing complexity while maintaining congestion management effectiveness
Solution Approach 2:
The UE autonomously monitors its own buffer size and independently makes discard decisions when the threshold is exceeded, without requiring complex network coordination or calculations. This self-service approach simplifies processing by enabling the UE to autonomously manage congestion based on local buffer state
2Reliability
If the UE uses available bandwidth for PDU discard decisions, then congestion is managed, but latency increases due to complex calculations
Solution Approach 1:
The patent substitutes the parameter for discard decision from available bandwidth (requiring complex real-time calculations) to buffer size threshold (a directly measurable value). This change eliminates computational delays and reduces latency in PDU discard decisions while maintaining effective congestion management
3Reliability
If the UE tracks available bandwidth for congestion management, then PDU discard decisions can be made, but processing resources are consumed by complex calculations
Solution Approach 1:
The patent changes the tracked parameter from available bandwidth (requiring complex continuous calculations consuming processing resources) to buffer size threshold (a simple directly measurable value). This parameter substitution significantly reduces processing resource consumption and energy usage while maintaining congestion management capability
Solution Approach 2:
The UE uses its own buffer size information for autonomous discard decisions, eliminating the need for complex network-assisted bandwidth calculations. This self-service mechanism conserves processing resources by relying on locally available buffer state information
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 indication of a buffer size threshold associated with a buffer of the UE. The UE may discard one or more protocol data units (PDUs) from the buffer based at least in part on a buffer size of the buffer satisfying the buffer size threshold. Numerous other aspects are described.