Scheduling Request Handling During Bandwidth Part Changes

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Solution Overview

Problem

In wireless communication systems, particularly in NR, there is no existing solution for handling ongoing scheduling requests when a terminal's Band Width Part (BWP) configuration changes.

Innovation Solution

A method and terminal configuration that determine if a BWP change is occurring during a scheduling request process, allowing the terminal to perform the scheduling request according to the SR configuration on the changed BWP, using either random access or dedicated scheduling request resources based on available configurations.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If multiple BWPs are configured for the terminal in NR system, then the network side can allocate bandwidth efficiently according to terminal capability, but there is no solution for handling ongoing SR process when BWP changes

Engineering Contradiction:

Improvebandwidth allocation adaptabilityVSAvoidscheduling request process reliability

Core Design Contradiction:

Adaptability or versatilityVSReliability

Solution Approach 1:

The patent applies dynamics by making the BWP configuration changeable during operation. The network can dynamically switch between different BWPs based on terminal capability and network conditions, while the SR process adapts to the current active BWP, ensuring the scheduling request mechanism remains functional throughout BWP transitions.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The patent uses parameter changes by modifying the active BWP parameters (bandwidth, frequency location) while maintaining the SR mechanism. When BWP changes occur, the SR process automatically adapts to the new BWP configuration, ensuring continuous operation without interruption or failure.

Inventive Principle:

Principle #35Parameter changes

2Productivity

If BWP is changed during SR process, then bandwidth can be optimized for current data needs, but the ongoing SR process may fail or become inconsistent

Engineering Contradiction:

Improvebandwidth utilization efficiencyVSAvoidSR process consistency

Core Design Contradiction:

ProductivityVSReliability

Solution Approach 1:

The patent applies preliminary action by ensuring the SR configuration is prepared to handle BWP changes. The terminal and network are pre-configured with multiple BWP options and SR parameters, allowing the SR process to seamlessly transition to the new BWP without interruption, maintaining both productivity and reliability.

Inventive Principle:

Principle #10Preliminary action

3Measurement precision

If dedicated SR resources are allocated on each BWP, then SR can be performed accurately on the correct BWP, but the system complexity increases

Engineering Contradiction:

ImproveSR resource allocation accuracyVSAvoidSR configuration complexity

Core Design Contradiction:

Measurement precisionVSDevice complexity

Solution Approach 1:

The patent applies universality by creating an SR mechanism that works across multiple BWPs. Instead of completely separate SR configurations for each BWP, the system uses a unified SR framework that automatically adapts to the active BWP, reducing complexity while maintaining accurate resource allocation on the correct BWP.

Inventive Principle:

Principle #6Universality (Multi-functionality)

Data Source

PatentUS11825480B2Method and terminal for performing scheduling request

Publication Date: 2023.11.21 DATANG MOBILE COMM EQUIP CO LTD

AI summary

Embodiments of the present application relate to a method and a terminal for performing a scheduling request (SR). The method includes determining, by a terminal, that a band width part (BWP) changes during a process of reporting the SR; and performing, by the terminal, the SR according to an SR configuration on the changed BWP.