Multi-Cell DCI Encoding for Spatially Scheduled Wireless Links
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Solution Overview
Problem
Existing wireless communication systems face challenges in supporting multi-cell scheduling and indicating spatial parameters or scheduled cells for uplink and downlink transmissions, which are crucial for efficient resource allocation and interference management in next-generation mobile communication systems.
Innovation Solution
The method involves joint-encoding first and second information related to a scheduled cell and spatial parameters within downlink control information (DCI) to facilitate uplink or downlink scheduling, enabling clear configuration of transmission and reception in the scheduled cell even without explicit TCI information.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If separate fields are used in DCI for scheduled cell information and spatial parameters, then clarity and reliability of parameter indication is improved, but control information overhead and device complexity increase
Solution Approach 1:
The patent combines multiple pieces of information (scheduled cell information, spatial parameters, TCI states) into a single unified field within DCI. This merging approach reduces the number of separate fields needed, thereby reducing control information overhead and simplifying processing while maintaining reliable parameter indication through the integrated field structure
Solution Approach 2:
The unified field in DCI serves multiple functions simultaneously: it indicates the scheduled cell, provides spatial parameters, and conveys TCI state information. This multi-functional design eliminates the need for separate dedicated fields for each parameter type, reducing overall complexity while ensuring all necessary information is conveyed reliably
2Loss of information
If explicit TCI information is always included in DCI, then transmission configuration clarity is improved, but control information overhead increases
Solution Approach 1:
The patent pre-configures TCI states and spatial parameters through higher-layer signaling before actual transmission. This preliminary configuration allows the DCI to reference pre-established parameters rather than including all details explicitly, thereby reducing DCI overhead while ensuring transmission configuration clarity through the pre-defined TCI states
Solution Approach 2:
The unified field in DCI acts as an intermediary that references pre-configured TCI states and spatial parameters. Instead of directly embedding all configuration details in DCI, the field serves as a pointer or reference to previously established configurations, reducing information overhead while maintaining clarity through the intermediary reference mechanism
Data Source
AI summary
Disclosed are a method and a device for uplink or downlink transmission/reception supporting multi-cell scheduling in a wireless communication system. According to an embodiment of the present disclosure, a method for performing uplink transmission or downlink reception by a terminal in a wireless communication system may comprise: a downlink control information (DCI) reception step of receiving, on a first cell, DCI for scheduling of an uplink physical channel or a downlink physical channel, wherein the DCI includes first information related to a scheduled cell, and second information related to a spatial parameter for the scheduled uplink physical channel or downlink physical channel; and a step of, on the basis of the DCI, performing transmission of the uplink physical channel or reception of the downlink physical channel on the scheduled cell, wherein the first information and the second information are joint-encoded by one or more fields included in the DCI.