UE Capability Signaling for Multiple PDSCH Scheduling
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Solution Overview
Problem
In wireless communication systems, user equipment (UE) faces performance degradation due to incorrect identification of non-overlapping and overlapping regions in multiple physical downlink shared channels (PDSCHs), leading to inappropriate demodulation scheme usage and increased complexity and power consumption.
Innovation Solution
The UE transmits capability signaling to the network entity indicating support for scheduling multiple PDSCHs with the same time domain resource allocation (TDRA) or frequency domain resource allocation (FDRA), allowing the network entity to schedule PDSCHs accordingly, ensuring accurate demodulation scheme usage and reducing UE complexity and power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the UE uses DMRS to determine non-overlapping and overlapping regions, then the UE can identify regions for different demodulation schemes, but the UE may incorrectly identify boundaries leading to performance degradation
Solution Approach 1:
The network entity performs preliminary scheduling of multiple PDSCHs with identical TDRA/FDRA before the UE needs to identify overlapping regions. By pre-configuring the resource allocations to be identical, the boundary identification problem is eliminated entirely, as there is no ambiguity about which resources overlap.
Solution Approach 2:
The invention changes the scheduling parameters by requiring identical TDRA (time domain resource allocation) and/or FDRA (frequency domain resource allocation) for multiple PDSCHs. This parameter constraint transforms the problem from one requiring complex boundary detection to one where boundaries are inherently well-defined by the identical allocation parameters.
2Productivity
If the UE handles multiple PDSCH scheduling without capability signaling, then the network entity cannot optimize scheduling, but the UE must handle all possible scheduling scenarios increasing complexity and power consumption
Solution Approach 1:
The UE provides capability feedback through capability signaling to the network entity, indicating whether it supports multiple PDSCH scheduling with same TDRA and/or FDRA. This feedback mechanism allows the network entity to adapt its scheduling decisions to the UE's capabilities, optimizing both network productivity and UE complexity management.
Solution Approach 2:
The scheduling system becomes dynamic through capability-based adaptation. The network entity can switch between different scheduling modes (with or without same TDRA/FDRA constraints) based on the UE's reported capabilities, allowing the system to optimize performance for each UE while managing complexity appropriately.
3Adaptability or versatility
If the network entity schedules multiple PDSCHs without capability signaling, then resource allocation flexibility is limited, but the UE may receive inappropriate scheduling increasing power consumption
Solution Approach 1:
The capability signaling provides feedback that enables the network entity to adapt its scheduling flexibility to match UE capabilities. When a UE indicates support for same TDRA/FDRA scheduling, the network can utilize this flexibility; otherwise, it uses more conservative scheduling, preventing the UE from having to process inappropriate high-complexity schedules that would increase power consumption.
Data Source
AI summary
Various aspects of the present disclosure generally relate to wireless communication. A UE capability for a multiple physical downlink shared channel (PDSCH) scheduling may be signaled from a UE to a network entity. A UE capability signaling may indicate whether the UE supports a multiple PDSCH scheduling being associated with a same time domain resource allocation (TDRA) and/or a same frequency domain resource allocation (FDRA). The network node may schedule the multiple PDSCHs, via a multiple user multiple-input multiple-output (MU-MIMO) PDSCH scheduling or a multiple downlink control information (multi-DCI) multiple transmission reception point (mTRP) PDSCH scheduling, based at least in part on the UE capability signaling. The network entity may guarantee that co-scheduled PDSCHs have the same TDRA and/or the same FDRA, which may be based at least in part on the UE capability signaling.