UE Occasion Validation for SBFD Overlap Handling
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Solution Overview
Problem
Existing wireless communication systems face challenges in identifying valid occasions for uplink transmissions when overlapping occasions occur, particularly in subband full duplex (SBFD) operations, as legacy UEs may incorrectly consider physical uplink shared channel (PUSCH) occasions valid despite overlaps with SBFD random access channel (RACH) occasions or network energy saving configurations.
Innovation Solution
A user equipment (UE) identifies the validity of occasions by applying validity rules to determine if a first occasion, such as a random access channel (RO) or physical uplink shared channel (PO), overlaps with a second occasion, and transmits uplink transmissions based on these rules, distinguishing between SBFD-aware and legacy occasions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If legacy UEs use traditional occasion validation methods, then compatibility with existing systems is maintained, but incorrect validity determination occurs in SBFD operations leading to transmission errors
Solution Approach 1:
The patent introduces a new validity rule parameter specifically for SBFD operations that changes the validation logic from traditional legacy rules. This parameter-based approach allows the UE to correctly identify invalid occasions in SBFD mode while maintaining compatibility with legacy operations, resolving the contradiction between reliability and adaptability.
Solution Approach 2:
The validity determination mechanism is made dynamic by allowing the UE to switch between different validity rules based on the operational mode (SBFD or legacy). This dynamic adaptation enables accurate occasion validation in SBFD operations while preserving backward compatibility with legacy systems.
2Reliability
If the UE identifies overlapping occasions as invalid, then transmission reliability is improved, but the number of available transmission occasions decreases
Solution Approach 1:
The patent applies different validity judgments to different occasions based on their specific characteristics. Not all overlapping occasions are treated uniformly - the validity rule specifically evaluates the local context of each occasion (e.g., whether it's an SBFD RO/PO overlap) to determine validity. This localized quality assessment maintains transmission reliability while preserving useful transmission opportunities.
Data Source
AI summary
Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may identify a first occasion that at least partially overlaps in one or more of time or frequency with a second occasion, wherein the first occasion is a random access channel occasion (RO) or a physical uplink shared channel occasion (PO), and the second occasion is an RO or a PO. The UE may identify a validity of the first occasion in relation to the second occasion based at least in part on a validity rule. The UE may transmit an uplink transmission in the first occasion or the second occasion based at least in part on the validity of the first occasion in relation to the second occasion. Numerous other aspects are described.