Packet Transmission Control via Priority Evaluation for Retransmission Data
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Solution Overview
Problem
The Proportional Fairness scheduling algorithm in mobile communications systems struggles to control packet allocation based on the presence of retransmission data and priority classes, leading to potential delays and increased error rates in upper layers.
Innovation Solution
A packet transmission control apparatus and method that incorporate a priority determination portion to generate an evaluation function considering the presence/absence of retransmission data and the number of data transmissions, allowing for adaptive packet allocation by adjusting priorities based on these factors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If Proportional Fairness scheduling is used to allocate packets based on transmission quality, then system throughput is improved, but packet allocation cannot be controlled based on retransmission data presence and priority classes
Solution Approach 1:
The patent applies dynamics by making the scheduling algorithm adaptable and changeable. The base station dynamically adjusts packet allocation based on real-time conditions including retransmission data presence, priority classes, and transmission quality. The evaluation function incorporates multiple variable factors that can be adjusted dynamically to optimize both throughput and allocation control flexibility.
Solution Approach 2:
The patent changes parameters by introducing multiple evaluation criteria beyond just transmission quality. The evaluation function includes parameters for retransmission data presence ( RETXn), priority classes (PCn), and transmission quality (Rn), allowing the system to adjust packet allocation based on changing parameter values to achieve both high throughput and flexible control.
2Device complexity
If packets are allocated without considering retransmission data presence, then scheduling simplicity is maintained, but delays and error rates in upper layers increase
Solution Approach 1:
The patent applies preliminary action by having the base station evaluate and identify retransmission data presence before making allocation decisions. The evaluation function proactively considers RETXn status, priority classes, and transmission quality in advance, allowing the system to prioritize packets that need retransmission before they cause delays or errors in upper layers.
Solution Approach 2:
The patent uses feedback by continuously monitoring transmission quality, retransmission data presence, and priority class information. This feedback is incorporated into the evaluation function, allowing the scheduling algorithm to adapt its decisions based on real-time system state, thereby improving upper layer reliability without excessive complexity.
3Device complexity
If priority allocation is not considered in packet scheduling, then scheduling simplicity is maintained, but packet transmission priority management becomes ineffective
Solution Approach 1:
The patent merges multiple scheduling considerations into a single unified evaluation function. By combining transmission quality (Rn), retransmission data presence ( RETXn), and priority class (PCn) into one comprehensive evaluation metric, the system achieves effective priority control without requiring separate complex scheduling algorithms for each factor.
Data Source
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AI summary
A disclosed packet transmission control apparatus that controls packet transmission to plural radio terminals includes a priority determination portion that determines a packet assignment priority in accordance with at least one of presence/absence of retransmission data and the number of data transmissions, and a radio terminal selection portion that selects a radio terminal to be a communications party in accordance with the priority.