Full Duplex UE Bandwidth Switching Without Latency

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Solution Overview

Problem

Existing wireless communication systems face challenges in adapting operating bandwidth with reduced latency, particularly in full duplex communication systems, leading to lower spectrum efficiency due to switching delays when changing bandwidths.

Innovation Solution

Configuring multiple resource bandwidths within an active bandwidth part (BWP) with distinct time and frequency resource configurations allows UEs to switch between these bandwidths without incurring switching delays, enabling reduced or zero latency adaptations.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If traditional bandwidth switching is used in full duplex systems, then bandwidth adaptation is achieved, but switching delays reduce spectrum efficiency

Engineering Contradiction:

Improvebandwidth adaptation capabilityVSAvoidswitching delay

Core Design Contradiction:

Adaptability or versatilityVSLoss of time

Solution Approach 1:

The patent applies preliminary action by pre-configuring multiple bandwidth parts (BWPs) with distinct time and frequency resource configurations before switching is needed. The network entity configures multiple BWPs in advance, and the UE prepares to switch between them without incurring switching delays when bandwidth adaptation is required, as the target configuration is already established and ready for immediate activation.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The patent implements dynamics by enabling dynamic switching between multiple pre-configured bandwidth parts based on real-time communication needs. The system allows the UE to adaptively switch between different BWP configurations (with distinct time and frequency resources) without fixed timing constraints, making the bandwidth adaptation flexible and responsive to changing channel conditions and traffic requirements.

Inventive Principle:

Principle #15Dynamics

2Productivity

If bandwidth switching is performed in existing systems, then operating bandwidth is changed, but spectrum efficiency decreases due to switching delays

Engineering Contradiction:

Improvespectrum efficiencyVSAvoidswitching delay

Core Design Contradiction:

ProductivityVSLoss of time

Solution Approach 1:

The network entity configures multiple bandwidth parts with distinct time and frequency resource allocations in advance. When bandwidth adaptation is needed, the UE can immediately switch to a pre-configured BWP without experiencing switching delays, as the target configuration is already prepared and validated, thereby maintaining high spectrum efficiency during bandwidth transitions.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The patent ensures continuity of useful action by designing the BWP switching mechanism to eliminate gaps or delays during bandwidth transitions. The distinct time and frequency resource configurations of multiple BWPs allow seamless switching without interrupting the communication flow, ensuring that spectrum utilization remains continuous and efficient throughout the bandwidth adaptation process.

Inventive Principle:

Principle #20Continuity of useful action

Data Source

PatentEP4082242B1Bandwidth operation for full duplex user equipment

Publication Date: 2026.04.22 QUALCOMM INC

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AI summary

Techniques and apparatus for adapting bandwidth operation for full duplex user equipments (UEs) are described. One technique involves a base station (BS) determining a plurality of resource bandwidths (BWs) within an active BWP that are available to be used for communications by one or more UEs. An indication of at least one resource BW of the plurality of resource BWs is signaled to a UE. Communications between the BS and the UE are performed on the at least one resource BW.