Retransmission Control Method for Mobile Handover Efficiency
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Solution Overview
Problem
Conventional communication systems face inefficiencies in throughput during handovers due to the discarding and retransmission of packets, as they rely on unstable handover possibilities, leading to waste in communication resources.
Innovation Solution
A retransmission control method that acquires the time required to complete retransmissions and adjusts the order of packet retransmission and handover execution based on this time, ensuring that retransmissions are completed before or after handovers, depending on the predicted duration, to minimize resource wastage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If retransmission packets are discarded and retransmitted during handover, then handover can be completed, but throughput decreases due to packet loss and redundant transmission
Solution Approach 1:
The system performs preliminary action by determining handover necessity and predicting retransmission completion timing before actually discarding or continuing retransmission packets. This advance planning allows the system to make informed decisions about packet handling during handover, preventing unnecessary packet loss while maintaining handover capability
Solution Approach 2:
The system dynamically adjusts retransmission behavior based on real-time conditions. By continuously monitoring handover status and retransmission progress, the system can adaptively change whether to discard or retain retransmission packets, optimizing both handover performance and throughput based on current system state
2Productivity
If retransmission packets are retained during handover, then throughput is maintained, but handover efficiency decreases due to prolonged retransmission processes
Solution Approach 1:
The system performs preliminary assessment of retransmission completion timing before handover occurs. By predicting whether retransmission will complete in time, the system can proactively decide to discard packets that would otherwise delay handover, thus reducing handover time while avoiding unnecessary throughput loss
Solution Approach 2:
The system dynamically balances throughput maintenance and handover speed by adjusting retransmission packet retention based on predicted completion timing. When retransmission is predicted to complete in time, packets are retained to maintain throughput; when completion is delayed, packets are discarded to accelerate handover
3Device complexity
If conventional handover control is used without retransmission time consideration, then system complexity remains low, but communication efficiency decreases due to unstable handover possibilities
Solution Approach 1:
The system introduces feedback mechanisms by monitoring retransmission progress and handover status, then using this information to dynamically adjust packet handling decisions. This feedback loop enables the system to optimize communication efficiency during handover without requiring complex predetermined rules, as decisions are based on actual system state
Data Source
AI summary
A base station, a mobile station and a retransmission control method for enabling communication to be more efficiently performed. In a communication system comprising a base station (100) and a mobile station (200), a time period required for the retransmission of a transport packet to complete is determined, and a retransmission control is performed, based on the required time period, to change the order of executing the retransmission of the transport packet and a handover. In this way, when it is estimated that the retransmission will complete soon, the retransmission is caused to complete in a handover source system, thereby avoiding waste of communication resources used in the preceding transmission and retransmission processes. When it is estimated that the retransmission will continue for a while, the communication resources used in the preceding transmission and retransmission processes are wasted, but a more appropriate MCS can be assigned, in a handover destination system, so as to perform a retransmission, thereby enabling communication to be efficiently performed.