UE Cancellation Sequence for Subband Full Duplex Interference
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Solution Overview
Problem
Current wireless communication systems face inefficiencies in managing overlapping transmissions within the same time and frequency resources, leading to collisions and interference, particularly in Subband Full Duplex (SBFD) operations, where determining the optimal transmission or cancellation of signals based on subband alignment and priority is complex.
Innovation Solution
A method where User Equipment (UE) in a wireless communication system is configured to perform transmissions based on specific rules, determining whether to perform or cancel transmissions based on subband alignment and priority, allowing for efficient handling of collisions by canceling or suspending transmissions that overlap with different subbands, and prioritizing transmissions within aligned subbands.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If transmissions are performed in overlapping time-frequency resources, then resource utilization increases, but collisions and interference occur
Solution Approach 1:
The patent divides the frequency band into multiple subbands and applies different transmission rules to each subband. Specifically, it segments the overlapping resources into first subband resources and second subband resources, allowing independent handling of transmissions in each segment. This enables the system to maintain high resource utilization while preventing collisions through subband-specific cancellation rules.
Solution Approach 2:
The patent applies different transmission quality rules to different subbands. In the first subband, transmissions are cancelled to avoid interference, while in the second subband, transmissions are maintained. This local differentiation of transmission quality allows the system to optimize resource utilization in certain subbands while ensuring reliability in others, resolving the contradiction between productivity and reliability.
2Reliability
If transmissions are cancelled to avoid collisions, then interference is reduced, but resource utilization decreases
Solution Approach 1:
Instead of cancelling transmissions uniformly across all resources, the patent segments the frequency band into subbands and applies selective cancellation only where necessary. By identifying first subband resources (where cancellation occurs) and second subband resources (where transmission continues), the system minimizes the impact on overall resource utilization while maintaining transmission reliability.
Solution Approach 2:
The patent changes the transmission parameter (cancellation vs. continuation) based on the subband identifier. When the subband identifier indicates a first subband, transmissions are cancelled; when it indicates a second subband, transmissions are maintained. This parameter-based differentiation allows the system to balance reliability and resource utilization dynamically across different frequency resources.
3Reliability
If subband-specific transmission rules are applied, then collision handling is improved, but system complexity increases
Solution Approach 1:
The patent uses the subband identifier as a key parameter to determine transmission behavior. The network device configures the UE with subband-specific rules, and the UE simply checks the subband identifier to decide whether to cancel or maintain transmissions. This parameter-driven approach improves collision handling while keeping the implementation relatively simple, as it avoids complex real-time calculations and relies on pre-configured rules.
Solution Approach 2:
The UE autonomously determines whether to cancel or maintain transmissions based on the subband identifier and pre-configured rules, without requiring continuous network intervention. This self-service mechanism simplifies the overall system complexity by distributing the decision-making logic to the UE, allowing it to handle collisions independently according to the configured subband-specific rules.
Data Source
AI summary
Methods, systems, and apparatuses are provided for cancellation sequence in a wireless communication system, comprising a User Equipment (UE) being configured with or scheduled to perform a first transmission in a first resource and to perform a second transmission in a second resource, wherein the first resource overlaps with the second resource in time domain, not performing the first transmission in the first resource and performing the second transmission in the second resource if the first resource is not within a Uplink (UL) subband and the second resource is within the UL subband, and performing the first transmission in the first resource and not performing the second transmission in the second resource if the first resource is within the UL subband and the second resource is within the UL subband.