Buffer Status Report Indicator for New QoS Flow Detection
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Solution Overview
Problem
In next-generation radio access networks, there is a challenge in distinguishing the arrival of a packet belonging to a new Quality of Service (QoS) flow on the default bearer from existing QoS flows, which hinders the scheduler's awareness of new QoS flows and affects proper resource allocation.
Innovation Solution
A method and apparatus are introduced to trigger a Buffer Status Report (BSR) when data from a new QoS flow arrives, with an indication of the new QoS flow included in the report, allowing the scheduler to recognize and manage new QoS flows efficiently, such as by prioritizing or duplicating the first packet of the new flow.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If the scheduler uses traditional buffer status reporting mechanisms, then the reporting process is simple and straightforward, but the scheduler cannot distinguish new QoS flows from existing flows, leading to improper resource allocation
Solution Approach 1:
The patent embeds a new indicator field within the existing buffer status report structure. This indicator, which signals the presence of new QoS flow data, is nested inside the traditional BSR format, allowing the scheduler to detect new flows without requiring a completely new reporting mechanism. The indicator acts as a nested element that triggers special handling while maintaining compatibility with existing BSR processing.
Solution Approach 2:
The patent modifies only the specific portion of the buffer status report that needs to convey new information about QoS flows, rather than redesigning the entire reporting structure. By adding a localized indicator field that specifically marks new QoS flow data, the solution maintains the simplicity of the overall BSR mechanism while introducing targeted functionality to resolve the information loss problem.
2Adaptability or versatility
If the network maintains backward compatibility with existing LTE systems, then deployment costs are reduced and interoperability is improved, but new QoS flow identification capabilities are not available
Solution Approach 1:
The patent designs the buffer status report indicator to serve multiple functions: it identifies new QoS flows in 5G NR systems while maintaining compatibility with existing LTE infrastructure. The indicator can be interpreted differently by different network elements - 5G gNBs recognize it as a signal for new flow identification, while legacy LTE systems continue to process the BSR as before, thus achieving multi-functionality and broad adaptability.
Solution Approach 2:
The patent introduces the new QoS flow indicator in advance within the buffer status report mechanism, allowing the network to prepare for and handle new QoS flows before they fully impact system operation. This preliminary inclusion of the indicator enables smooth transition and compatibility maintenance, as the infrastructure is pre-configured to handle both old and new requirements.
3Reliability
If the system triggers buffer status reports only for existing QoS flows, then signaling overhead is minimized, but new QoS flows remain undetected by the scheduler
Solution Approach 1:
The patent applies partial action by adding only the necessary minimum element - a single indicator field - to the buffer status report rather than implementing comprehensive new flow detection mechanisms. This partial modification is sufficient to enable new QoS flow identification while keeping signaling overhead minimal. The indicator is triggered only when needed (when new flows are detected), avoiding excessive signaling for every BSR transmission.
Data Source
AI summary
Systems, methods, apparatuses, and computer program products for buffer status reporting and efficient handling of new quality of service (QoS) flows on the default bearer in next generation (NG) radio access networks (RAN) are provided.