Single DCI Multi-PDSCH Scheduling in 5G NR
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Solution Overview
Problem
In current 5G NR systems, it is challenging for base stations to provide resource information for multiple physical downlink shared channels (PDSCHs) to terminals through a single Downlink Control Information (DCI) message, leading to difficulties in scheduling and transmitting data efficiently across multiple PDSCHs.
Innovation Solution
The method involves a terminal receiving a sync signal and downlink control information (DCI) from a base station, using this information to acquire mode and resource details for multiple PDSCHs, allowing the base station to schedule and transmit data across these channels efficiently with reduced signaling overhead by configuring resource information within a single DCI message.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If resource information for multiple PDSCHs is provided through separate DCI messages, then scheduling accuracy is improved, but signaling overhead increases
Solution Approach 1:
The patent combines resource information for multiple PDSCHs into a single DCI message by introducing a joint grant structure that includes multiple resource allocation fields. This allows the base station to schedule multiple downlink shared channels using one DCI instead of multiple separate DCI messages, thereby reducing signaling overhead while maintaining scheduling accuracy through structured resource allocation fields within the unified DCI.
Solution Approach 2:
The patent creates a universal DCI structure that can simultaneously convey resource information for multiple PDSCHs. The joint grant includes multiple resource allocation fields that can accommodate different PDSCH configurations, making the single DCI message capable of performing the function of multiple separate DCI messages while reducing overall signaling overhead.
2Loss of information
If resource information for multiple PDSCHs is consolidated in a single DCI, then signaling overhead is reduced, but scheduling complexity increases
Solution Approach 1:
The patent segments the joint grant into distinct resource allocation fields, each corresponding to a specific PDSCH. This segmentation allows the base station and terminal to separately process resource information for each PDSCH within the unified DCI structure, reducing scheduling complexity by providing clear delimiters and structured organization for multiple resource allocations.
Solution Approach 2:
The patent introduces an intermediary joint grant structure that mediates between the base station's scheduling decisions and the terminal's resource allocation. This joint grant acts as an intermediate layer that organizes multiple PDSCH resource informations in a structured manner, simplifying the scheduling process by providing a standardized format for multi-PDSCH resource allocation.
3Adaptability or versatility
If multiple DCI messages are used for scheduling multiple PDSCHs, then resource allocation flexibility is improved, but processing time increases
Solution Approach 1:
The patent merges multiple resource allocation operations into a single joint grant that can simultaneously allocate resources for multiple PDSCHs. This consolidation allows the terminal to receive all necessary resource information in one DCI message, reducing processing time by eliminating the need to receive and process multiple separate DCI messages while maintaining resource allocation flexibility through the structured joint grant format.
Solution Approach 2:
The patent performs preliminary organization of multiple PDSCH resource allocations within the joint grant structure before transmission to the terminal. By pre-structuring the resource information for multiple PDSCHs in a single DCI message, the base station enables the terminal to process all resource allocations simultaneously rather than sequentially, thereby reducing processing time while preserving allocation flexibility.
Data Source
AI summary
The present disclosure discloses a method of operating a terminal and a base station in a wireless communication system and an apparatus supporting same. According to an embodiment applicable to the present disclosure, a terminal may establish a connection with a base station on the basis of a synchronization signal/physical broadcast channel (SS/PBCH) block received from the base station. Then, the terminal is set to a transmission mode in which data generated from identical information is transmitted by the base station through a plurality of physical downlink shared channels (PDSCHs), and on the basis of the aforementioned, the terminal may obtain resource information through which the data is transmitted through the plurality of PDSCHs, and obtain related data information.