Inter eNB Carrier Aggregation Throughput Measurement via X2 Delay Estimation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current technologies lack a feasible method to measure Inter eNB Carrier Aggregation throughput effectively, particularly in scenarios where data transmission involves multiple Component Carriers across different eNBs, due to complexities in scheduling and transmission delays across the X2 interface.
Innovation Solution
The proposed solution involves determining and calculating the throughput by measuring the size of PDCP SDU volumes transmitted between primary and secondary cells, estimating transmission delays, and comparing final points in time to calculate effective throughput, while minimizing the load on the X2 interface through averaging and efficient reporting mechanisms.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If data transmission is performed across multiple Component Carriers from different eNBs in Inter eNB Carrier Aggregation, then throughput capacity is improved, but measurement complexity and scheduling difficulty increase due to X2 interface transmission delays
Solution Approach 1:
The patent segments the throughput measurement process into distinct components: separating PDCP SDU volume measurement at the eNB from UE throughput reporting, dividing data volume tracking into first and second data volumes with corresponding secondary parts, and splitting timing measurements into first and second initial points in time and first and second primary final points in time. This segmentation allows complex Inter eNB CA throughput measurement to be handled through manageable, modular measurement steps.
Solution Approach 2:
The patent introduces an intermediary measurement mechanism where the network side (eNB) performs PDCP SDU volume measurements and timing measurements, then provides this measurement information to the UE. The UE uses this intermediary measurement data along with its own scheduling information to calculate the final throughput. This intermediary approach bridges the complexity gap between network-side control and UE-side reporting.
2Measurement precision
If detailed throughput measurement is performed for Inter eNB Carrier Aggregation, then measurement precision is improved, but message exchange frequency and X2 interface load increase
Solution Approach 1:
The patent implements partial measurement action by having the network side perform only PDCP SDU volume measurements and timing measurements, while the UE performs the final throughput calculation using its own scheduling information combined with network-provided measurement data. This partial division of measurement tasks achieves precise throughput measurement without requiring the network to handle complete measurement processing, thereby reducing message exchange frequency and X2 interface load.
3Area of stationary object
If carrier aggregation of up to five 20 MHz Component Carriers is configured, then bandwidth and data rate are improved, but transmission coordination and scheduling complexity increase
Solution Approach 1:
The patent segments the carrier aggregation measurement process by separately tracking data volumes for different Component Carriers (first data volume and second data volume), measuring timing for each carrier independently (first and second initial points in time, first and second primary final points in time), and calculating throughput for each carrier separately. This segmentation enables efficient coordination of up to five 20 MHz Component Carriers by handling each carrier's measurement and scheduling independently while maintaining overall system throughput optimization.
Data Source
AI summary
Method, comprising determining sizes of first and second data received at PCell for transmission to UE and of secondary parts of the first and second data transmitted from PCell to SCell for transmission to UE; deciding first and second initial times of the transmission of the respective data; deciding first and second primary final times indicating an end of transmission of the respective primary parts; monitoring an indication of a throughput of SCell; obtaining a transmission delay from PCell to SCell; estimating first and second secondary final times based on transmission delay, size of the respective secondary part, and the throughput; identifying first and second latest final times among the respective primary and secondary final times; calculating first and second throughputs of the transmission of the respective data based on the size of the respective data and a respective duration between the respective initial time and latest final time.