Base Station Flow Control via Radio Environment Feedback
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Solution Overview
Problem
The existing flow control mechanism in distributed transmission, such as dual connectivity in LTE-advanced systems, is inefficient as it requires time for the master base station to determine an appropriate data transfer amount based on feedback from the secondary base station, leading to suboptimal throughput due to data depletion or retransmission timeouts.
Innovation Solution
Implementing a system where the distribution source base station acquires radio environment information from the distribution destination base station or user equipment to control data transfer amounts dynamically, allowing for prompt adjustment of data division ratios based on communication quality, thereby improving flow control efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the master base station waits for feedback from the secondary base station to determine data transfer amount, then flow control accuracy is improved, but transmission speed deteriorates due to time delay
Solution Approach 1:
The master base station performs preliminary estimation of the data transfer amount to the secondary base station based on historical information and current radio environment, before receiving actual feedback. This allows the system to proactively adjust data division ratios without waiting for feedback cycles, thereby improving transmission speed while maintaining acceptable flow control accuracy through subsequent feedback-based corrections
2Productivity
If data is accumulated in base stations for distributed transmission, then throughput is improved, but retransmission timeouts occur when too much data accumulates
Solution Approach 1:
The system implements a feedback mechanism where the master base station receives acknowledgment information from the secondary base station about data reception status and radio environment conditions. Based on this feedback, the master base station dynamically adjusts the data transfer amount and division ratio to the secondary base station, preventing both data depletion (which reduces throughput) and excessive accumulation (which causes retransmission timeouts), thereby simultaneously improving throughput and reliability
3Productivity
If the master base station dynamically adjusts data division ratio based on radio environment information, then flow control efficiency is improved, but system complexity increases
Solution Approach 1:
The master base station dynamically changes the data division ratio parameter based on received radio environment information from the secondary base station. By adjusting this key parameter in response to measured radio conditions (such as channel quality, interference levels, and load conditions), the system achieves efficient flow control without requiring complex architectural changes, thereby improving flow control efficiency while limiting the increase in system complexity to simple parameter adjustments
Data Source
AI summary
A technique of promptly implementing appropriate flow control in distributed transmission is provided. An aspect of the present invention relates to a base station serving as a distribution source base station in distributed transmission in which transmission target packets are divided and transmitted from a plurality of base stations to a user equipment, wherein the base station includes a feedback information acquiring unit that acquires radio environment information of a distribution destination base station in the distributed transmission; and a communication control unit that controls the distributed transmission according to the radio environment information.