DCI Processing for Multi-Cell Scheduling via Codepoint Configuration
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Solution Overview
Problem
In new radio (NR) systems, when downlink control information (DCI) needs to schedule multiple serving cells simultaneously, existing technologies face challenges in enabling user equipment (UE) to accurately parse the scheduling information without modifying the DCI format.
Innovation Solution
A method and device where a network device configures serving cell indexes or codepoint information within a configuration parameter or bitfield of the DCI, allowing the UE to parse scheduling information for multiple serving cells without altering the DCI format, by using carrier indicator fields and codepoint information to indicate scheduling details.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the DCI format is modified to include scheduling information for multiple serving cells, then the scheduling capability is improved, but the device complexity and protocol compatibility deteriorate
Solution Approach 1:
The patent applies universality by enabling a single DCI format to perform multiple functions: it can schedule one serving cell or multiple serving cells depending on the configuration. The target bitfield in the DCI can be configured to indicate either a single serving cell index or multiple serving cell indexes, making the DCI structure universal for different scheduling scenarios without requiring separate DCI formats.
Solution Approach 2:
The patent uses parameter changes by configuring the interpretation of the target bitfield in the DCI based on higher-layer parameters. When multiple serving cells are scheduled, the codepoint information in the target bitfield is configured to indicate multiple serving cell indexes. This parameter-based configuration allows the same DCI format to adapt to different scheduling needs without structural modification.
2Adaptability or versatility
If the DCI format is modified to accommodate multiple serving cells, then the scheduling versatility is improved, but the ease of operation and implementation deteriorate
Solution Approach 1:
The DCI format is designed to be universal, capable of indicating either single or multiple serving cells through configurable parameters. The target bitfield can be interpreted differently based on configuration, allowing the same format to serve multiple purposes without requiring separate formats for single-cell and multi-cell scheduling.
Solution Approach 2:
The system uses self-service by allowing the configuration parameters to automatically determine how the target bitfield should be interpreted. When multi-cell scheduling is configured, the codepoint information naturally maps to multiple serving cell indexes, and the UE autonomously parses the information according to the configured interpretation rules without requiring additional signaling or complex processing.
3Measurement precision
If codepoint information is configured to indicate multiple serving cells, then the scheduling information accuracy is improved, but the information overhead increases
Solution Approach 1:
The patent applies parameter changes by configuring the codepoint information in the target bitfield to represent multiple serving cell indexes when multi-cell scheduling is enabled. The same bitfield structure is used, but its interpretation changes based on configuration parameters, allowing accurate indication of multiple cells without increasing the physical size of the DCI message.
Solution Approach 2:
The patent uses partial action by utilizing only the necessary portion of the codepoint information space required for the configured scheduling scenario. When multiple serving cells are scheduled, the codepoints are configured to map to the specific set of schedulable serving cells, using only the required number of bits to represent the needed information without allocating excessive overhead for all possible cell combinations.
Data Source
AI summary
Embodiments of the present disclosure provides a method for processing downlink control information, including: receiving, by a UE, DCI sent by a network device; determining a first serving cell according to a CIF value in the DCI, and determining a target serving cell scheduled by the DCI according to a configuration parameter of the first serving cell, where the configuration parameter includes one or more serving cell indexes; or, determining, according to codepoint information corresponding to a target bitfield in the DCI, scheduling information of the target serving cell scheduled by the DCI, where the codepoint information corresponding to the target bitfield in the DCI is used to indicate scheduling information of one or more schedulable serving cells.