Half-Duplex Multi-Carrier UE Collision Handling in SBFD
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Solution Overview
Problem
Current wireless communication systems face challenges in efficiently managing collisions between uplink and downlink transmissions on multiple component carriers in half-duplex multi-carrier user equipment (UE) configurations, particularly in Subband Full Duplex (SBFD) deployments, where existing standards lack effective prioritization mechanisms, leading to inflexible scheduling and potential errors.
Innovation Solution
The method involves a half-duplex UE receiving TDD configurations from a base station and applying a set of priority rules to select between uplink and downlink transmissions or receptions in time slots and symbols, allowing for collision handling and prioritization based on semi-static and dynamic configurations, ensuring efficient resource allocation and minimizing errors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If existing standard prioritization mechanisms are used in half-duplex multi-carrier UE configurations, then scheduling simplicity is maintained, but scheduling flexibility is limited and errors may occur due to inability to effectively handle collisions between uplink and downlink transmissions
Solution Approach 1:
The patent segments the prioritization mechanism into multiple hierarchical levels: first determining whether a collision exists between uplink and downlink transmissions, then applying different prioritization rules based on the type of transmission (uplink or downlink), and finally selecting specific resources based on configured priorities. This segmented approach enables flexible collision handling while maintaining manageable complexity through structured decision-making processes.
Solution Approach 2:
The patent implements dynamic prioritization by allowing the network to configure different priority levels for uplink and downlink transmissions on different component carriers. The UE dynamically adjusts its transmission/reception behavior based on real-time collision detection and configured priority rules, enabling adaptive scheduling that responds to changing network conditions and traffic requirements.
2Reliability
If collision handling mechanisms are implemented in half-duplex multi-carrier UE, then transmission errors are reduced, but processing time and complexity increase
Solution Approach 1:
The patent applies preliminary action by pre-configuring priority rules and parameters through RRC signaling before collisions occur. The network provides the UE with configured priorities for different component carriers and transmission types in advance, enabling the UE to quickly resolve collisions using pre-established rules rather than making complex decisions in real-time, thus reducing processing time while maintaining high reliability.
Solution Approach 2:
The patent enables self-service by allowing the UE to autonomously detect collisions between uplink and downlink transmissions and independently apply prioritization rules based on configured parameters. The UE determines which transmission to prioritize without requiring real-time network intervention, reducing processing time and enabling rapid collision resolution while maintaining transmission reliability through systematic prioritization.
Data Source
AI summary
In an aspect of the disclosure, a method, a computer-readable medium, and an apparatus are provided. The apparatus may be a UE. In certain configurations, the UE receives, from a base station, a plurality of time division duplexing (TDD) configurations of time slots and symbols for a plurality of component carriers (CCs). The CCs include a first CC and a second CC. The UE determines, according to the TDD configurations, whether a collision exists between an uplink (UL) transmission on the first CC and a downlink (DL) reception on the second CC for each of the time slots and the symbols. The UE selects one of the UL transmission and the DL reception for one of more of the time slots and the symbols with the collision based on a plurality of priority rules.