Multi-Carrier PDSCH Scheduling With Reference SCS Slot Alignment
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Solution Overview
Problem
Current wireless communication systems lack a method to determine slots where multiple Physical Downlink Shared Channels (PDSCHs) are transmitted on different carriers with a consistent scheduling timing value (K0) when scheduled simultaneously by a single Downlink Control Information (DCI).
Innovation Solution
Determine the time units for PDSCH transmission on multiple carriers based on a reference Subcarrier Spacing (SCS) corresponding to the DCI, the maximum or minimum SCS of the carriers, or the SCS of each carrier, using a time unit offset to align transmission slots.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If one DCI schedules multiple PDSCHs on multiple carriers with different SCS, then scheduling efficiency is improved, but slot determination becomes ambiguous without a reference SCS
Solution Approach 1:
The patent introduces a reference SCS as an intermediary element that mediates between the DCI scheduling timing and the actual PDSCH transmission slots on carriers with different SCS. The reference SCS serves as a common time base that allows the terminal to consistently determine slots across multiple carriers with different numerologies, resolving the ambiguity while maintaining efficient multi-carrier scheduling
2Loss of information
If slot offset K0 is applied uniformly across carriers with different SCS, then DCI overhead is reduced, but transmission timing alignment becomes problematic
Solution Approach 1:
The patent applies local quality by allowing each carrier to have its own SCS-specific slot determination while using a unified reference SCS framework. The terminal converts the reference SCS-based slot offset into carrier-specific slot positions based on each carrier's individual SCS, enabling both uniform DCI signaling and precise local timing alignment for each carrier
Data Source
AI summary
The present disclosure provides PDSCH reception method and device, PDSCH transmission method and device, an apparatus and a medium. A terminal receives DCI for scheduling the transmission of a PDSCH on a plurality of carriers, determines a time unit where the one or more PDSCHs are transmitted on the plurality of carriers in accordance with a reference SCS or an SCS of each carrier, and receives the scheduled PDSCH in the determined one or more time units on the plurality of carriers. A base station transmits the DCI, and transmits the scheduled PDSCH in a time unit where the one or more PDSCHs are transmitted on the plurality of carriers. The terminal determines the time unit where the one or more PDSCHs are transmitted on the plurality of carriers in accordance with the reference SCS or the SCS of each carrier.