Two-Stage DCI Multiplexing for PDSCH Resource Management
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Solution Overview
Problem
Current wireless communication systems, particularly in 5G NR, face challenges in efficiently managing downlink control information (DCI) to optimize resource allocation and decoding processes for physical downlink shared channels (PDSCH).
Innovation Solution
The implementation of a two-stage downlink control information (DCI) system, where a first stage DCI provides information on time and frequency resources for a PDSCH, and a second stage DCI includes decoding information for the PDSCH. This system allows for multiplexing of the second stage DCI with the PDSCH and overlapping in time, enabling efficient resource management and decoding.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the second stage DCI is multiplexed with the PDSCH and overlapping in time, then resource management efficiency is improved and processing overhead is reduced, but the complexity of decoding the PDSCH increases due to the need to handle overlapping control information
Solution Approach 1:
The DCI is divided into two stages: first stage DCI containing common control information and second stage DCI containing decoding information. This segmentation allows the control information to be distributed across different time resources, enabling multiplexing with PDSCH while maintaining manageable decoding complexity through structured information organization.
Solution Approach 2:
The patent introduces a temporal dimension by allowing the second stage DCI to overlap in time with the PDSCH. This dimensional approach enables efficient resource utilization by multiplexing control information with data channels in the time domain, improving productivity without proportionally increasing decoding complexity.
2Device complexity
If the second stage DCI is multiplexed with the PDSCH, then processing overhead is reduced, but the reliability of control information delivery may be compromised due to potential interference
Solution Approach 1:
The decoding information is extracted into a separate second stage DCI that can be multiplexed with the PDSCH. This extraction allows the control information to be transmitted efficiently without requiring separate dedicated resources, reducing processing overhead while maintaining reliability through proper resource allocation and interference management.
Solution Approach 2:
The first stage DCI acts as an intermediary that provides common control information and enables the second stage DCI to be multiplexed with the PDSCH. This intermediary structure facilitates efficient resource sharing while maintaining the reliability of control information delivery through hierarchical information organization.
3Productivity
If a two-stage DCI system is implemented, then decoding efficiency is improved, but the complexity of the control information structure increases
Solution Approach 1:
The control information structure is segmented into two distinct stages with specific functions. The first stage handles common control information while the second stage handles decoding information. This segmentation improves decoding efficiency by providing structured, hierarchical information that can be processed in stages, reducing the overall complexity of handling control information.
Solution Approach 2:
The first stage DCI is transmitted in advance to provide common control information before the second stage DCI. This preliminary action enables the receiver to prepare for decoding the PDSCH, improving overall decoding efficiency while the structured two-stage approach keeps the control information complexity manageable through clear temporal separation.
Data Source
AI summary
Apparatus, methods, and computer program products for wireless communication are provided. An example method may include receiving, from a network node, a first stage downlink control information (DCI) associated with a second stage DCI, where the first stage DCI comprises information regarding a set of time and frequency resources associated with a physical downlink shared channel (PDSCH), and where the second stage DCI includes decoding information associated with the PDSCH. The example method may further include receiving, from the network node based on the information regarding the set of time and frequency resources, a transmission including the second stage DCI and the PDSCH, where the second stage DCI is multiplexed with the PDSCH, and where the second stage DCI is overlapping in time with the PDSCH. The example method may further include decoding the PDSCH based on the second stage DCI.