Single DCI Scheduling Multiple PDSCHs in 5G NR
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Solution Overview
Problem
In 5G NR systems, it is challenging for base stations to efficiently provide resource information for multiple physical downlink shared channels (PDSCHs) to terminals through a single Downlink Control Information (DCI) message, leading to increased signaling overhead and complexity in scheduling and receiving data.
Innovation Solution
A method where a terminal monitors a physical downlink control channel (PDCCH) signal, enters an awake state to receive DCI, and assumes data reception through multiple PDSCHs based on the DCI, allowing it to obtain resource information and data using a single DCI message, thereby simplifying the scheduling and reducing signaling overhead.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If multiple separate DCI messages are used to schedule multiple PDSCHs, then resource allocation accuracy is improved, but signaling overhead increases
Solution Approach 1:
The patent combines multiple PDSCH scheduling operations into a single DCI message by introducing a PDSCH bundle concept. The base station transmits multiple PDSCHs that are bundled together and scheduled by one DCI, reducing the number of separate scheduling messages while maintaining resource allocation accuracy through unified resource indication fields in the bundled DCI structure.
Solution Approach 2:
The DCI message is enhanced to perform multiple functions simultaneously: it schedules multiple PDSCHs through bundled scheduling, indicates resource allocation for all bundled PDSCHs using unified resource indication fields, and provides transmission configuration for multiple channels. This multi-functionality reduces the need for separate DCI messages while preserving allocation precision.
2Measurement precision
If multiple separate DCI messages are used to schedule multiple PDSCHs, then scheduling control precision is improved, but device complexity increases
Solution Approach 1:
The patent merges multiple scheduling operations into a single DCI message that controls multiple PDSCHs. The terminal device receives one DCI and processes it to schedule multiple bundled PDSCHs, reducing the complexity of receiving and processing multiple separate DCI messages while maintaining scheduling control through unified resource indication and configuration fields.
Solution Approach 2:
The base station performs preliminary configuration by establishing PDSCH bundles and pre-defining resource allocation patterns. The terminal device then uses these pre-configured bundle structures to efficiently decode and execute scheduling decisions, reducing real-time processing complexity while maintaining precise scheduling control through the pre-established bundled framework.
3Loss of information
If a single DCI schedules multiple PDSCHs, then signaling overhead is reduced, but resource allocation flexibility decreases
Solution Approach 1:
The patent segments the bundled PDSCHs into individual schedulable units while maintaining their bundled relationship. Each PDSCH within the bundle can be independently configured with specific resource allocations, allowing the system to reduce signaling overhead through bundling while preserving flexibility by enabling independent resource assignment for each segmented PDSCH through fields in the unified DCI.
Solution Approach 2:
The patent introduces dynamic configuration capabilities where the base station can adjust bundle sizes, resource allocation patterns, and scheduling parameters based on channel conditions and traffic requirements. The unified DCI structure supports dynamic resource indication that can adapt to different allocation scenarios, maintaining flexibility despite the reduced number of separate DCI messages.
Data Source
AI summary
An operating method of a terminal and a base station in a wireless communication system, and a device for supporting same are disclosed. According to one embodiment applicable to the disclosure, a terminal, in which a discontinuous reception (DRX) mode is set, sets a transmission mode in which data generated from the same information by means of a base station is transmitted through physical downlink shared channels (PDSCHs), resource information by which data is transmitted through the plurality of PDSCHs is acquired, on the basis of the transmission mode, so that relevant data information is acquired.