Sidelink BWP Deactivation for UL–SL Numerology Matching
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Solution Overview
Problem
In wireless communication systems, a numerology mismatch between uplink bandwidth parts (UL BWP) and sidelink bandwidth parts (SL BWP) can lead to inefficient operation, as existing technologies lack effective methods to manage and switch between these bandwidth parts to align numerologies.
Innovation Solution
The proposed solution involves procedures for a user equipment (UE) to selectively deactivate either the SL BWP or the active UL BWP when a numerology mismatch is detected, allowing the UE to autonomously switch to a compatible UL BWP or deactivate the SL BWP to maintain operational efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the UE maintains both UL BWP and SL BWP configurations independently, then the system supports flexible sidelink and uplink operations, but numerology mismatch occurs leading to operational inefficiency
Solution Approach 1:
The UE monitors the numerology of the active UL BWP and compares it with the configured SL BWP numerology. This feedback mechanism triggers automatic BWP switching or deactivation when a mismatch is detected, ensuring operational efficiency while maintaining flexibility through autonomous adaptation.
Solution Approach 2:
The UE autonomously manages BWP configuration by self-detecting numerology mismatches and automatically switching UL BWPs or deactivating SL BWPs without network intervention. This self-service approach resolves the contradiction by enabling the UE to adapt its own configuration to maintain operational efficiency.
2Productivity
If the UE autonomously switches between UL BWPs to match SL BWP numerology, then communication efficiency improves, but device complexity increases
Solution Approach 1:
The UE implements autonomous BWP management by automatically detecting numerology mismatches and switching to appropriate UL BWPs. This self-service mechanism improves communication efficiency through timely adaptation while containing device complexity by using standardized procedures rather than complex custom logic.
Solution Approach 2:
The system dynamically changes the active UL BWP parameters (specifically numerology) to match the SL BWP requirements. This parameter adaptation enables efficient sidelink operation by aligning numerologies without requiring complex structural changes to the device architecture.
3Reliability
If the UE deactivates SL BWP to avoid numerology mismatch, then operational reliability improves, but sidelink communication capability is reduced
Solution Approach 1:
The UE continuously monitors UL BWP numerology and provides feedback to determine whether to activate or deactivate SL BWP. This feedback-driven approach ensures operational reliability by preventing mismatches while preserving sidelink capability through conditional activation based on current UL BWP state.
Solution Approach 2:
The SL BWP activation state dynamically adapts to the active UL BWP numerology. When a matching UL BWP becomes available, the SL BWP is activated; when no match exists, it remains deactivated. This dynamic behavior maintains operational reliability while maximizing sidelink communication opportunities.
Data Source
AI summary
Apparatuses, methods, and systems are disclosed for deactivation of a bandwidth part (BWP). A base station may be configured to transmit a first configuration for one or more uplink (UL) BWPs, for a carrier of a serving cell, where at least one UL BWP of the one or more UL BWPs is an active UL BWP associated with a first numerology. The base station may be further configured to transmit a second configuration for a sidelink (SL) BWP, for the carrier of the serving cell, wherein the SL BWP is associated with a second numerology, where the SL BWP is deactivated in response to the first numerology being different than the second numerology.