QoS Flow to DRB Remapping for UE Queue Overflow Prevention
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Solution Overview
Problem
Current specifications allow only the network to trigger updates of QoS flow to DRB mapping, leading to quick filling of data queues at the UE side and potential service degradation due to delays in packet delivery.
Innovation Solution
User Equipment (UE) is equipped to analyze traffic usage and initiate QoS flow to DRB remapping or packet shifting based on current or anticipated traffic, providing UE assistance information to the network for dynamic QoS adaptation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If only the network triggers QoS flow to DRB mapping updates, then network control over resource allocation is maintained, but data queues at the UE side fill up quickly causing packet delays and service degradation
Solution Approach 1:
The UE performs preliminary analysis of traffic patterns and queue status before queues become full, enabling proactive remapping decisions that prevent delays rather than reacting after congestion occurs
Solution Approach 2:
The UE provides feedback information to the network about local traffic conditions and queue status, enabling the network to make informed remapping decisions that balance network control with local optimization needs
2Adaptability or versatility
If the network maintains sole control over QoS flow to DRB mapping, then centralized resource management is achieved, but the UE cannot adapt quickly to local traffic conditions resulting in queue overflow
Solution Approach 1:
The UE autonomously analyzes its own traffic patterns and queue status, and can initiate remapping requests based on local conditions without waiting for network instructions, enabling self-service adaptation
Solution Approach 2:
The UE monitors traffic conditions in advance and prepares remapping requests before queues become full, allowing proactive adaptation to changing traffic conditions rather than reactive responses
3Productivity
If the UE initiates QoS flow to DRB remapping based on local traffic analysis, then local optimization and reduced packet delay are achieved, but network control and coordination complexity increase
Solution Approach 1:
The UE provides partial information about traffic conditions to the network, allowing the network to make remapping decisions based on combined local and global knowledge, distributing the complexity burden appropriately
Data Source
AI summary
A unit equipment (UE) configured to establish a protocol data unit (PDU) session including one or more quality of service (QoS) flows and multiple data radio bearers (DRB) for communications with a network, decode, from signals received from the network, or determine an initial mapping table for a QoS flow to DRB mapping based on a network configuration of mapping parameters, decode, from signals received from the network, or determine information regarding current or upcoming traffic on the one or more QoS flows or one or more DRBs, and configure transceiver circuitry to transmit an indication to the network based on the information regarding current or upcoming traffic on the one or more QoS flows or one or more DRBs.