Threshold-Based Buffer State Reporting in LTE User Equipment
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Solution Overview
Problem
Current wireless communication systems, particularly in UTRAN LTE, face inefficiencies in uplink packet scheduling due to lack of a priori knowledge of data in user equipment (UE) buffers, leading to wasteful use of bandwidth and resources, as they cannot optimally allocate radio resources without knowing the available data.
Innovation Solution
Implementing a threshold-based buffer reporting scheme that groups logical channel flows by traffic priority, determines aggregate data flows, compares them with threshold values to generate indication values, and transmits these values from the UE to the base station, enabling efficient Quality of Service (QoS)-aware packet scheduling with reduced signaling overhead.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If blind scheduling is used without buffer state information, then device complexity is reduced, but resource utilization efficiency deteriorates
Solution Approach 1:
The patent extracts only the essential buffer state information (threshold-based indicators) from the complete buffer status and transmits it to the base station. This selective extraction provides sufficient scheduling information while keeping the reporting mechanism simple and efficient, resolving the contradiction between simplicity and effectiveness.
Solution Approach 2:
The patent transforms continuous buffer state parameters into discrete threshold-based indication values. By comparing buffer levels against predefined thresholds and reporting only the resulting indication values, the system achieves efficient scheduling with minimal signaling overhead, balancing complexity and resource utilization.
2Measurement precision
If complete buffer state information is reported, then scheduling accuracy is improved, but signaling overhead increases
Solution Approach 1:
The patent extracts only the essential buffer state information (threshold-based indicators) from the complete buffer status and transmits it to the base station. This selective extraction provides sufficient scheduling information while keeping the reporting mechanism simple and efficient, resolving the contradiction between simplicity and effectiveness.
Solution Approach 2:
Instead of reporting complete buffer state information, the patent reports partial information that is sufficient for effective scheduling decisions. The threshold-based indication values provide the necessary scheduling accuracy without the overhead of complete buffer status reporting.
3Reliability
If QoS-aware scheduling is implemented, then service quality is improved, but device complexity increases
Solution Approach 1:
The patent segments logical channel flows into different priority groups (higher priority and lower priority) and applies separate threshold configurations for each group. This segmentation enables QoS-aware scheduling by treating different traffic types differently, while keeping the complexity manageable through structured grouping and separate threshold management.
Solution Approach 2:
The patent applies different threshold values and reporting configurations to different priority groups of logical channel flows. By tailoring the buffer reporting parameters to the specific QoS requirements of each traffic type, the system achieves QoS-aware scheduling with optimized complexity for each service category.
Data Source
AI summary
Methods, apparatus and computer program products are provided. A method includes: providing at least one logical channel flow, wherein each logical channel flow of the at least one logical channel flow has an associated traffic priority; grouping the at least one logical channel flow by the associated traffic priority to form at least one group; determining an aggregate data flow for at least one group; comparing the determined aggregate data flow with at least one threshold value to obtain an indication value; and transmitting the indication value from a user equipment to a base station.