Single-DCI Scheduling of PDSCH/PUSCH Across Multiple Serving Cells

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Solution Overview

Problem

Existing wireless communication systems face inefficiencies in scheduling multiple downlink and uplink transmissions across multiple cells, leading to increased signaling overhead and blind decoding costs due to the need for multiple Downlink Control Information (DCI) transmissions.

Innovation Solution

Implementing a mechanism that allows a base station to schedule multiple downlink and uplink transmissions across multiple cells using a single DCI, optimizing the HARQ process number field to indicate specific HARQ processes for each scheduled cell, and enhancing scheduling-related procedures such as HARQ, Time Domain Resource Allocation, and Bandwidth Part configurations.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If multiple DCI transmissions are used to schedule downlink and uplink transmissions across multiple cells, then scheduling flexibility and coverage are improved, but signaling overhead and blind decoding costs increase

Engineering Contradiction:

Improvescheduling flexibilityVSAvoidsignaling overhead

Core Design Contradiction:

Adaptability or versatilityVSLoss of information

Solution Approach 1:

The patent combines multiple DCI transmissions into a single DCI message that schedules multiple PDSCH and PUSCH transmissions across multiple cells. This merging approach reduces signaling overhead by eliminating redundant scheduling information while maintaining the ability to schedule multiple cells simultaneously, directly resolving the contradiction between scheduling flexibility and signaling overhead.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The single DCI format is designed to serve multiple functions by scheduling downlink and uplink transmissions across multiple cells simultaneously. This multi-functional DCI structure allows the system to maintain high scheduling flexibility and adaptability while reducing the number of separate DCI messages needed, thereby reducing signaling overhead.

Inventive Principle:

Principle #6Universality (Multi-functionality)

2Ease of operation

If multiple DCI transmissions are used to schedule multiple cells, then cell-specific scheduling control is improved, but processing complexity and blind decoding requirements increase

Engineering Contradiction:

Improvescheduling controlVSAvoidblind decoding complexity

Core Design Contradiction:

Ease of operationVSDevice complexity

Solution Approach 1:

The patent merges multiple cell-specific scheduling controls into a single DCI message that contains scheduling information for multiple cells. This approach reduces blind decoding complexity by requiring the UE to decode only one DCI message instead of multiple separate DCI transmissions, while still maintaining cell-specific scheduling control through dedicated fields within the unified DCI structure.

Inventive Principle:

Principle #5Merging (Combining)

3Reliability

If separate DCI transmissions are used for each cell, then transmission reliability per cell is improved, but overall system throughput and latency are degraded

Engineering Contradiction:

Improvetransmission reliabilityVSAvoidsystem throughput

Core Design Contradiction:

ReliabilityVSProductivity

Solution Approach 1:

The patent combines scheduling for multiple cells into a single DCI transmission, which improves system throughput by reducing signaling overhead and processing delays. The unified DCI structure maintains transmission reliability through robust error correction and acknowledgment mechanisms that cover all scheduled cells, preventing the need for separate reliability checks that would increase latency.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The single DCI format enables continuous scheduling of multiple cells without the interruptions and delays associated with multiple separate DCI transmissions. This continuity improves overall system throughput by eliminating gaps between scheduling decisions while maintaining reliable transmission through coordinated HARQ processes across all scheduled cells.

Inventive Principle:

Principle #20Continuity of useful action

Data Source

PatentEP4250615B1Method, user equipment and base station for performing multiple receptions or transmission on multiple serving cells

Publication Date: 2025.10.29 SHARP KK

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AI summary

A method and a user equipment (UE) for reporting LTE capability for small data transmission (SDT) are provided. The method includes: receiving control information for scheduling a plurality of physical downlink shared channels (PDSCHs) or a plurality of physical uplink shared channels (PUSCHs) on the plurality of serving cells; and performing, based on the control information, receptions of the plurality of PDSCHs on the plurality of serving cells or transmissions of the plurality of PUSCHs on the plurality of serving cells. The control information includes a plurality of fields, and the plurality of fields include at least one of a hybrid automatic repeat request (HARQ) process number field, a PDSCH-to-HARQ timing indicator field, and a time domain resource allocation (TDRA) field, and the TDRA field is used to allocate time domain resources for all of the plurality of PDSCHs or all of the plurality of PUSCHs.