5G DCI Transmission Dynamic Unit Length Parsing
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Solution Overview
Problem
In the 5G communications system, the parameters configured for downlink control information (DCI) using semi-static signaling often become inconsistent with the actual information that needs to be carried, leading to inefficiencies in data transmission.
Innovation Solution
The method involves receiving first control information with M unit lengths, where N unit lengths are effective and (M-N) unit lengths are ineffective, allowing the terminal to determine and parse only the effective unit lengths, thereby aligning preconfigured and actual transmitted information.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If semi-static signaling is used to configure DCI parameters, then DCI overhead is reduced, but the configured parameters become inconsistent with actual transmission requirements
Solution Approach 1:
The patent introduces dynamic indication mechanisms (such as indication fields in DCI or RRC signaling) that allow the terminal to dynamically determine the effective quantity of unit lengths based on actual transmission requirements. This dynamic adjustment resolves the contradiction by enabling the system to adapt parameter configurations in real-time, ensuring both low overhead and high consistency reliability.
2Adaptability or versatility
If more information is dynamically configured in DCI, then system flexibility is improved, but DCI overhead increases
Solution Approach 1:
The patent segments the DCI structure into fixed configuration parts (configured by semi-static signaling) and dynamic indication parts (transmitted in DCI). The fixed part contains basic parameters that rarely change, while the dynamic part contains indication information that allows flexible adaptation. This segmentation reduces overall overhead while maintaining system flexibility.
Solution Approach 2:
Instead of transmitting all configuration parameters dynamically, the patent transmits only the necessary indication information (partial action) that allows the terminal to derive the actual parameters from the pre-configured values. This partial transmission approach maintains flexibility while significantly reducing DCI overhead.
3Loss of information
If the terminal parses all M unit lengths, then no information is missed, but processing complexity increases when N < M
Solution Approach 1:
The patent extracts and transmits only the effective quantity of unit lengths (N) through indication mechanisms, allowing the terminal to focus parsing efforts only on the relevant N unit lengths among the total M configured unit lengths. This extraction approach ensures information completeness for effective lengths while reducing processing complexity by eliminating unnecessary parsing of ineffective lengths.
Data Source
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AI summary
Embodiments of this application disclose a control information transmission method and an apparatus, and relate to the field of communications technologies, to help resolve a problem that a DCI related parameter configured by using semi-static signaling is inconsistent with information that actually needs to be carried by using DCI. The method may include: receiving first control information, where the first control information includes M unit lengths, N unit lengths are effective unit lengths, 0 ≤ N < M, and both M and N are integers; and determining information carried in the N effective unit lengths.