Control Information Transmission Method for 5G Terminal Complexity
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Solution Overview
Problem
The existing communication systems, particularly in LTE and future 5G networks, face complexity due to numerous transmission modes and schemes, leading to frequent RRC reconfigurations and increased blind detection complexity in terminals, necessitating a redesign of the air interface for improved flexibility and reduced user equipment complexity.
Innovation Solution
A new control information transmission method and device that simplifies control information formats and transmission schemes, allowing for dynamic switching between different transmission schemes based on feedback, using explicit or implicit indication of transmission schemes within the control information formats, and defining specific formats for downlink and uplink data transmissions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple transmission modes and schemes are supported in LTE and 5G systems, then system adaptability and versatility are improved, but terminal complexity and blind detection complexity increase
Solution Approach 1:
The patent segments the transmission schemes into distinct types (first transmission scheme and second transmission scheme) with different reference signal configurations. By dividing the complex set of transmission modes into manageable segments with clear differentiation through reference signal time difference measurements, the terminal can selectively process only the relevant schemes rather than handling all possible modes, thus reducing complexity while maintaining adaptability.
Solution Approach 2:
The patent changes the parameter of reference signal time difference measurement to distinguish between different transmission schemes. Instead of requiring the terminal to blindly detect multiple transmission modes, the system uses parameter changes in reference signal configuration (time difference thresholds) to implicitly indicate the transmission scheme type, thereby reducing terminal processing complexity while preserving system versatility.
2Adaptability or versatility
If frequent RRC reconfigurations are performed to adapt to different transmission modes, then system flexibility is improved, but processing time and overhead increase
Solution Approach 1:
The patent introduces dynamic switching between transmission schemes based on real-time channel conditions and reference signal measurements. Instead of relying on frequent RRC reconfigurations, the system dynamically adapts the transmission scheme selection based on measured reference signal time differences and threshold comparisons, enabling faster adaptation without the overhead of complete RRC reconfiguration procedures.
Solution Approach 2:
The patent implements a feedback mechanism where the terminal measures reference signal time differences and feeds this information back to determine the appropriate transmission scheme. This feedback-based adaptation allows the system to respond to changing conditions without requiring full RRC reconfiguration, thereby reducing processing time and overhead while maintaining system flexibility.
3Loss of information
If multiple DCI formats are defined for different transmission modes, then control information completeness is improved, but device complexity and processing overhead increase
Solution Approach 1:
The patent makes the first DCI format universal by enabling it to carry control information for both the first transmission scheme and the second transmission scheme. This multi-functional design eliminates the need for separate DCI formats for different transmission modes, thereby maintaining control information completeness while significantly reducing device complexity and processing overhead.
Solution Approach 2:
The patent merges the functionality of multiple DCI formats into a single first DCI format that can indicate different transmission schemes through reference signal time difference measurements. By combining what were previously separate control information formats into one unified structure, the system maintains complete control information while reducing the complexity of format differentiation and processing.
Data Source
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AI summary
The present invention discloses a control information transmission method and an apparatus. In one solution of the present invention, control information that is sent by a control information sending device is associated with one of at least two transmission schemes, and the control information includes information used to indicate a transmission scheme type, so that a control information receiving device can determine the corresponding transmission scheme based on the control information. In another solution of the present invention, a control information sending device sends, based on a type of a control channel used to send control information, the control information by using a control information format corresponding to the type of the control channel, where a first control channel is corresponding to P first-type control information formats, a second control channel is corresponding to Q second-type control information formats, and the two types of control information formats differ in at least one of a quantity of control information formats, a maximum bit quantity of a control information format, and a minimum bit quantity of a control information format.