DCI Format Alignment for Lower-Complexity NR Scheduling
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Solution Overview
Problem
The complexity and energy consumption of detecting downlink control information (DCI) in terminal devices are high due to varying DCI formats, which affects communication efficiency and resource utilization in new radio systems.
Innovation Solution
A method and apparatus that adjust DCI detection by aligning DCI sizes and formats based on transmission direction and service load information, reducing blind detection complexity and energy consumption through techniques like zero padding and truncation, and optimizing DCI transmission using SPS resources.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the terminal device detects DCI in different formats with different sizes, then the scheduling flexibility and service adaptability are improved, but the detection complexity and energy consumption increase
Solution Approach 1:
The patent changes the parameter of DCI size by introducing size alignment between different DCI formats. Different DCI formats (e.g., format 0_0, 0_1, 1_0, 1_1) are padded or truncated to have the same size, allowing the terminal to detect DCI with uniform parameters while maintaining the ability to support various service types through format indicators and field interpretations.
2Adaptability or versatility
If the terminal device detects DCI in different formats with different sizes, then the scheduling flexibility is improved, but the energy consumption increases
Solution Approach 1:
The patent uniformizes the size parameter of different DCI formats through padding or truncation operations. This allows the terminal device to perform blind detection with a fixed size expectation, reducing the computational energy required for processing variable-sized DCI messages while preserving scheduling flexibility through format-specific field interpretations.
3Device complexity
If DCI sizes are aligned across different formats, then the detection complexity is reduced, but the DCI payload capacity may be reduced
Solution Approach 1:
The patent applies size alignment by padding shorter DCI formats with dummy bits or truncating longer formats to a common size. This parameter change simplifies detection complexity while the actual information capacity is preserved through proper field interpretation and format identification mechanisms that distinguish between padded and meaningful bits.
Data Source
AI summary
A terminal device receives first information from a network device, where the first information indicates transmission direction information and/or service load information. The terminal device receives downlink control information DCI from the network device based on the first information. The network device may configure a DCI transmission mode by using the first information based on a characteristic of a to-be-transmitted service of the terminal device.