Base Station Scheduling for 5G Round-Trip Delay Thresholds

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Solution Overview

Problem

Existing communication systems in 5G networks struggle to dynamically adjust round-trip delay threshold times based on the dynamic nature of uplink and downlink data processing times, leading to potential delays exceeding the predetermined threshold, especially in applications requiring low latency like industrial robotics and IoT systems.

Innovation Solution

Implementing a resource controller in the base station that dynamically adjusts uplink and downlink delay threshold times using the Earliest Deadline First (EDF) method, calculating remaining times and reallocating communication resources to ensure timely transmission of data within the round-trip delay threshold by updating priorities based on actual processing times and application-specific requirements.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Device complexity

If the delay threshold time is determined from a history of past communication, then the communication resource allocation can be simplified, but the round-trip communication may not be completed within the predetermined delay threshold time

Engineering Contradiction:

Improvecommunication resource allocation complexityVSAvoiddelay threshold time compliance

Core Design Contradiction:

Device complexityVSReliability

Solution Approach 1:

The patent applies dynamics by making the delay threshold time adjustable rather than fixed. The base station dynamically adjusts the delay threshold time based on the actual processing time of uplink data at the server. When the processing time is longer than expected, the delay threshold time is extended accordingly, allowing round-trip communication to complete within the new threshold. This dynamic adjustment resolves the contradiction by adapting the threshold to actual conditions rather than relying on historical averages.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The patent implements feedback by having the base station monitor the actual processing time of uplink data at the server and use this information to adjust the delay threshold time. The base station receives feedback about server processing performance and continuously optimizes the delay threshold setting. This feedback mechanism ensures that the delay threshold accurately reflects current system conditions, improving reliability while maintaining reasonable allocation complexity.

Inventive Principle:

Principle #23Feedback

2Ease of operation

If the communication priority is determined based on a predetermined delay threshold time, then the resource allocation process is straightforward, but the end-to-end communication may exceed the delay threshold

Engineering Contradiction:

Improveresource allocation process simplicityVSAvoidend-to-end communication delay

Core Design Contradiction:

Ease of operationVSLoss of time

Solution Approach 1:

The patent makes the delay threshold time dynamic rather than predetermined. The base station adjusts the delay threshold based on actual server processing times observed in real-time. This dynamic adjustment allows the system to maintain simple priority-based resource allocation while ensuring that communication deadlines are realistic and achievable, preventing time loss due to overly aggressive threshold settings.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The patent changes the parameter of delay threshold time from a fixed predetermined value to a variable that adapts to actual system conditions. By monitoring server processing performance and adjusting the threshold parameter accordingly, the system maintains operational simplicity while optimizing communication timing to prevent delays.

Inventive Principle:

Principle #35Parameter changes

3Reliability

If the timing for generation of transmission data and size of transmission data are unknown until generation, then resource allocation must be conservative, but this leads to inefficient resource utilization

Engineering Contradiction:

Improvecommunication completion guaranteeVSAvoidresource utilization efficiency

Core Design Contradiction:

ReliabilityVSProductivity

Solution Approach 1:

The patent applies preliminary action by having the base station proactively adjust the delay threshold time before round-trip communication begins. Based on historical data and current system state, the base station sets an appropriate delay threshold that accounts for expected server processing times. This preliminary setting allows for more aggressive and efficient resource allocation while maintaining reliability, as the threshold is already optimized rather than being overly conservative.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The patent uses feedback mechanisms to monitor actual communication performance and adjust resource allocation strategies accordingly. By observing actual processing times and communication outcomes, the base station continuously refines its resource allocation decisions, improving productivity while maintaining the reliability needed to ensure communication completion within adjusted thresholds.

Inventive Principle:

Principle #23Feedback

Data Source

PatentUS12520287B2Base station and storage medium

Publication Date: 2026.01.06 KK TOSHIBA

AI summary

According to one embodiment, a base station includes a communication circuit and a controller. The communication circuit receives and transmits uplink data and downlink data. The controller calculates a downlink remaining time based on a first time when the communication circuit receives a resource allocation request, a second time when the communication circuit receives the uplink data, a third time when the communication circuit receives the downlink data, and a round-trip delay threshold time, and determines a fourth time when the communication circuit will transmit the downlink data to the terminal based on the downlink remaining time.