Wireless Communication PUSCH SCS Switching for SBFD Interference Control
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In the 5G NR system, the existing SCS configuration for PUSCH in SBFD scenarios is inflexible, leading to potential interference and inefficiencies in uplink and downlink spectrum resource utilization, and requires frequent RRC message updates.
Innovation Solution
A method for configuring a first BWP with a first information block set that determines a first SCS configuration, allowing for two SCS configurations, enabling flexible scheduling and reducing interference by using a target SCS configuration that affects time domain resources and information transmission timing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a single SCS configuration is used for PUSCH in SBFD scenarios, then the system configuration is simple, but scheduling flexibility and interference avoidance are insufficient
Solution Approach 1:
The patent introduces dynamic SCS configuration where the PUSCH can switch between first SCS configuration (from BWP configuration) and second SCS configuration (from DCI indication). This dynamic switching capability allows the system to adapt to different scheduling scenarios in SBFD, enabling flexible resource allocation while maintaining manageable configuration through structured selection between predefined options.
Solution Approach 2:
The patent changes the SCS parameter from fixed to variable by allowing two different SCS configurations. The first SCS configuration is derived from BWP parameters, while the second SCS configuration is indicated through DCI, enabling parameter variation based on scheduling needs. This parameter change resolves the contradiction by providing adaptability without requiring complete reconfiguration of the system.
2Adaptability or versatility
If RRC messages are updated frequently to adapt to SBFD scenarios, then configuration flexibility is improved, but signaling overhead increases
Solution Approach 1:
The patent segments the SCS configuration into two independent parts: first SCS configuration embedded in BWP RRC parameters and second SCS configuration carried in DCI. This segmentation allows the system to maintain flexible configuration through RRC while using efficient DCI for dynamic adjustments, reducing the need for frequent RRC updates and minimizing signaling overhead.
Solution Approach 2:
The first SCS configuration is prepared in advance through BWP RRC configuration, providing a baseline setting. The second SCS configuration is pre-defined in DCI options, allowing quick switching without requiring full RRC reconfiguration. This preliminary preparation reduces signaling overhead by avoiding frequent comprehensive RRC message updates.
3Reliability
If existing PUSCH configuration schemes are used in SBFD, then compatibility with current systems is maintained, but interference between uplink and downlink increases
Solution Approach 1:
The patent applies local quality by allowing different SCS configurations for different PUSCH transmissions within the same BWP. The first SCS configuration maintains compatibility with existing BWP-based systems, while the second SCS configuration enables interference avoidance in specific SBFD scenarios. This localized differentiation resolves the contradiction by maintaining overall compatibility while addressing specific interference issues.
Solution Approach 2:
The DCI acts as an intermediary mechanism that selects between first and second SCS configurations. Instead of directly changing RRC configurations, the system uses DCI as an intermediate to indicate the appropriate SCS configuration for each transmission, maintaining compatibility while avoiding interference through flexible, on-demand configuration selection.
Data Source
Figure 1~3
Figure 4~7
Figure 8~12
AI summary
The present application discloses a method and apparatus for wireless communication. A node first receives a first information block set, the first information block set being used for configuring a first BWP, the first information block set comprising a BWP information unit, and the BWP information unit being used for determining a first SCS configuration; and then sends a first PUSCH; the first PUSCH depending on the first information block set, the first PUSCH depending on a target SCS configuration, the target SCS configuration candidates comprising the first SCS configuration and a second SCS configuration, and the second SCS configuration being different from the first SCS configuration. The present application is directed at a full-duplex system, improves an SCS configuration method and application method, and further ensures overall performance of the systems on the basis flexible use of spectrum resources while improving the overall performance of the system.