Base Station Data Retransmission via Predictive Resource Allocation
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Solution Overview
Problem
Existing data retransmission technologies in LTE architecture face inefficiencies due to inadequate resource allocation and resulting delays, particularly in scenarios where data units are not delivered promptly, leading to fragmentation and increased signaling back-and-forth.
Innovation Solution
A base station method that determines undelivered data units, calculates their sizes, and allocates sufficient radio resources for retransmission, reducing signaling and delay by ensuring complete data unit retransmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the base station waits for status report PDUs to trigger retransmission, then resource allocation can be confirmed, but transmission delay increases and productivity decreases
Solution Approach 1:
The base station proactively allocates radio resources for retransmission before receiving status report PDUs, by predicting which data units may need retransmission based on current transmission status and channel conditions. This preliminary resource allocation eliminates waiting time and accelerates the retransmission process while maintaining reliability through selective prediction of undelivered data units.
2Productivity
If the base station allocates radio resources for retransmission, then transmission delay is reduced, but resource waste occurs if data units are already delivered
Solution Approach 1:
The base station dynamically adjusts the resource allocation parameters by calculating the probability that each data unit needs retransmission based on delivery confirmation status and channel conditions. Resources are allocated selectively to data units with high probability of needing retransmission, optimizing the balance between retransmission speed and resource efficiency through parameter-based decision making.
3Reliability
If the base station sends polling requests to obtain status reports, then delivery confirmation is obtained, but signaling transmission increases and device complexity rises
Solution Approach 1:
Instead of sending polling requests for all data units, the base station sends polling requests only for a subset of data units that are most likely to need retransmission based on current transmission status and channel conditions. This partial action approach obtains sufficient delivery confirmation information while significantly reducing signaling overhead and system complexity.
Data Source
AI summary
The invention provides a base station and a data retransmission method thereof. The data retransmission method includes the following steps: determining whether at least one data unit is delivered; in response to the at least one data units being undelivered, calculating data sizes corresponding to undelivered data units; determining a resource grant indication according to the data sizes, the resource grant indication being related to radio resources required for resending the undelivered data units; and sending the resource grant indication. In this way, the data units have a higher chance to be completely retransmitted, and signaling transmission can be reduced, thereby reducing transmission delay.