Uplink Time-Stamped Buffer Status Reporting for 5G Scheduling
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Solution Overview
Problem
Current 5G wireless communication systems lack an efficient procedure for flexibly transferring uplink packet arrival timing information from user equipment to network entities, leading to increased signaling overhead and inaccurate scheduling, particularly in applications requiring stringent latency and reliability, such as URLLC and TSC.
Innovation Solution
Implement an enhanced buffer status report (eBSR) procedure that dynamically transfers uplink timing information with minimal signaling overhead by configuring user equipment to time-stamp UL packets relative to a reference point, allowing network entities to perform efficient resource allocation and QoS monitoring.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional buffer status report procedures are used, then signaling overhead is reduced, but uplink timing information transfer accuracy deteriorates
Solution Approach 1:
The network entity pre-configures multiple buffer status report formats with different timing information structures before the UE needs to report. This allows the UE to select the most appropriate format without real-time negotiation, reducing signaling overhead while ensuring accurate timing information is transmitted when needed.
Solution Approach 2:
The system dynamically selects buffer status report formats based on current traffic conditions and timing requirements. Different formats are used for different scenarios (e.g., periodic vs. event-triggered reporting), allowing the system to adapt to varying accuracy requirements while minimizing unnecessary signaling.
2Productivity
If flexible uplink timing information transfer is implemented, then scheduling accuracy improves, but device complexity increases
Solution Approach 1:
The buffer status report is segmented into multiple formats, each optimized for specific timing information requirements. The UE segments its report based on what the network has pre-configured, avoiding the need to implement all possible format variations and reducing device complexity while maintaining scheduling efficiency.
Solution Approach 2:
A single buffer status report mechanism serves multiple functions by supporting different formats within the same reporting procedure. The UE can use the same uplink resources and timing advance values for different report types, reducing the need for separate mechanisms and lowering overall system complexity.
3Adaptability or versatility
If multiple buffer status report formats are supported, then adaptability to different traffic patterns improves, but signaling overhead increases
Solution Approach 1:
The system changes parameters within the buffer status report structure (such as timing offset values, periodicity indicators, and format selection bits) to adapt to different traffic patterns. This allows multiple traffic types to be supported using a unified reporting framework, avoiding the need for completely separate signaling procedures for each traffic pattern.
Data Source
AI summary
According to one example embodiment, a method may include receiving, by a user equipment, at least one buffer status report configuration from a network entity. The method may further include measuring, by the user equipment, at least one uplink packet arrival time according to the received at least one buffer status report configuration. The method may further include selecting, by the user equipment, at least one buffer status report format. The method may further include transmitting, by the user equipment, at least one uplink time-stamped buffer status report to the network entity according to the selected at least one buffer status report format.