Complementary Bandwidth Part Switching for 5G NR Latency Reduction

Resolve Bottlenecks,
Find Innovative SolutionsGenerate Solutions

Solution Overview

Problem

In 5G NR wireless communication networks, switching between bandwidth parts (BWP) is a time-consuming process, which can increase latency and hinder efficient full duplex operations.

Innovation Solution

The implementation of a user equipment (UE) and scheduling entity system that enables UE to transmit UE capability information indicating support for complementary BWPs, allowing for faster switching between an anchor BWP and a complementary BWP, reducing switching time compared to non-complementary BWPs.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If standard BWP switching is used, then communication can adapt to different duplex modes, but switching time increases latency and reduces efficiency

Engineering Contradiction:

Improveadaptability to duplex mode changesVSAvoidBWP switching time

Core Design Contradiction:

Adaptability or versatilityVSLoss of time

Solution Approach 1:

The patent configures complementary BWPs in advance with pre-established parameter sets that are optimized for rapid switching. When a duplex mode change is detected, the system can immediately switch between the anchor BWP and the pre-configured complementary BWP without performing complex reconfiguration, thereby reducing switching time while maintaining adaptability to different duplex modes

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The patent introduces a mechanism to change the switching parameter from standard switching time to reduced switching time by utilizing complementary BWP configurations. The system modifies the BWP switching parameters by selecting complementary BWPs that have compatible parameters, enabling faster switching while maintaining communication quality and adaptability

Inventive Principle:

Principle #35Parameter changes

2Adaptability or versatility

If frequent BWP switching is performed for format changes, then full duplex and half duplex operations can be adapted, but latency increases and communication efficiency decreases

Engineering Contradiction:

Improvesupport for multiple slot formatsVSAvoidcommunication efficiency

Core Design Contradiction:

Adaptability or versatilityVSProductivity

Solution Approach 1:

The system pre-configures complementary BWPs with optimized parameters for frequent format changes. When format changes occur, the UE can rapidly switch between anchor and complementary BWPs using pre-established configuration, reducing the latency impact of frequent switching while maintaining the ability to support multiple slot formats

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The patent creates a complementary BWP that is a simplified copy or variant of the anchor BWP, designed specifically for rapid switching scenarios. This complementary BWP contains essential parameters that allow the system to quickly adapt to different formats without reconfiguring the entire BWP, thereby maintaining communication efficiency during frequent format changes

Inventive Principle:

Principle #26Copying

Data Source

PatentUS11910380B2UE capabilities for supporting complementary bandwidth part operations in wireless communication

Publication Date: 2024.02.20 QUALCOMM INC

AI summary

Aspects of the present disclosure provide techniques for wireless communication using a user equipment (UE) capability indication to support complementary bandwidth part (BWP) operations. In one aspect, a UE can transmit UE capability information to indicate the ability of the UE to support complementary BWP operations, and the network can configure complementary BWP operations based on the UE capability.