Dynamic Bandwidth Part Switching for Full Duplex Unpaired Spectrum
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Solution Overview
Problem
Current wireless communication systems face challenges in dynamically switching bandwidth parts for full duplex operation in unpaired spectrum, leading to inefficiencies in resource allocation and interference management.
Innovation Solution
The implementation of dynamic bandwidth part (BWP) switching techniques allows user equipment (UE) to transmit an indication of full duplex capability, enabling base stations to adjust BWP configurations for uplink and downlink communications, optimizing resource allocation and minimizing interference by adjusting guard bands and slot offsets.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If dynamic BWP switching is implemented for full duplex operation, then resource allocation efficiency is improved, but system complexity increases
Solution Approach 1:
The patent implements dynamic BWP switching that allows the system to adaptively change bandwidth part configurations based on real-time full duplex operation requirements. The base station receives capability indications from UEs and dynamically adjusts BWP configurations for uplink and downlink, enabling flexible resource allocation while managing interference through time-varying parameter adjustments.
Solution Approach 2:
The patent changes key communication parameters including BWP configurations, subcarrier spacings, and cyclic prefix lengths to enable full duplex operation. By modifying these parameters dynamically based on UE capability indications, the system achieves improved resource allocation efficiency while the standardized parameter sets limit the complexity increase.
2Object-affected harmful factors
If guard bands are adjusted to minimize interference in full duplex mode, then interference management is improved, but frequency resource utilization deteriorates
Solution Approach 1:
The patent applies different BWP configurations to different frequency regions (uplink and downlink) within the same carrier. By assigning specific bandwidth parts with appropriate guard bands to uplink and downlink transmissions, the system locally optimizes interference management in each frequency region while maintaining overall efficient resource utilization through targeted rather than universal guard band application.
Solution Approach 2:
The patent segments the available frequency spectrum into distinct bandwidth parts for uplink and downlink operations. This segmentation allows independent optimization of each BWP, enabling guard bands to be applied only where necessary for interference management while maximizing the utilization of remaining frequency resources for actual data transmission.
3Productivity
If BWP configurations are optimized for full duplex operation, then communication efficiency is improved, but compatibility with legacy systems deteriorates
Solution Approach 1:
The patent employs a two-stage configuration approach where legacy TDD BWP configurations are established first, and then full duplex-capable BWP configurations are added subsequently. The base station receives UE capability indications and selectively activates appropriate configurations, allowing legacy systems to operate with standard TDD modes while new full duplex-capable UEs benefit from optimized configurations without requiring legacy system modifications.
Solution Approach 2:
The patent designs the BWP configuration system to serve multiple functions: it supports both traditional TDD operation modes and new full duplex operation modes within the same framework. The base station can select and activate different BWP configurations based on UE capabilities, making the system universal enough to handle both legacy compatibility requirements and advanced full duplex communication needs.
Data Source
AI summary
Methods, systems, and devices for wireless communications are described. A user equipment (UE) may communicate with a base station using a bandwidth part (BWP) configuration in a component carrier (CC). The UE may transmit an indication of a capability of the UE to operate in a full duplex (e.g., frequency division duplex (FDD)) mode on a single carrier in an unpaired frequency spectrum based on a first BWP configuration. The UE may receive an indication of a second BWP configuration for one or more slots based on transmitting the indication of the capability of the UE, the second BWP configuration including a configuration associated with an uplink BWP and a downlink BWP. The UE and the base station may then communicate according to the second BWP configuration in the one or more slots of the set of slots based on receiving the indication of the second BWP configuration.