Split DCI Transmission for 5G Signaling Overhead Reduction
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Solution Overview
Problem
In the 5G network architecture, the existing method for transmitting Downlink Control Information (DCI) struggles to meet the diverse transmission requirements of different types of control information, resulting in high signaling overhead.
Innovation Solution
The proposed solution involves using two distinct DCIs with different formats and information lengths/content to carry different types of control information, allowing the terminal device to send or receive target data based on a combination of control information from both, while optimizing the transmission cycle to reduce signaling overhead.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a single DCI is used to transmit all control information, then the terminal device can obtain one DCI corresponding to the terminal device, but it is very difficult to meet the transmission requirements of different types of control information and results in high signaling overhead
Solution Approach 1:
The patent divides control information into two separate DCIs: first DCI contains first control information (e.g., scheduling information for data transmission), and second DCI contains second control information (e.g., power control information). This segmentation allows each DCI to be optimized for its specific purpose, meeting different transmission requirements while reducing overall signaling overhead compared to a single comprehensive DCI.
2Reliability
If different types of control information are transmitted on one DCI, then the terminal device can perform operations on data channel according to control information, but the signaling overhead increases and transmission requirements cannot be met
Solution Approach 1:
The patent segments control information into two distinct DCIs with different formats and structures. The first DCI is optimized for data scheduling with fields like resource allocation and modulation scheme, while the second DCI is optimized for power control with fields like power offset and path loss reference. This segmentation improves reliability by meeting specific transmission requirements for each control information type without creating a complex unified structure.
Solution Approach 2:
Each DCI is designed with local quality optimized for its specific function. The first DCI contains control information fields appropriate for data transmission scheduling, while the second DCI contains fields appropriate for power control. This localized optimization ensures that each type of control information is transmitted with the appropriate structure and parameters, improving overall system reliability.
3Productivity
If control information is transmitted with fixed transmission cycle, then the terminal device can regularly detect DCI, but it cannot optimize the sending cycle for different types of control information
Solution Approach 1:
The patent enables dynamic transmission cycles for different DCIs. The first DCI can be transmitted at a first transmission cycle optimized for data scheduling requirements, while the second DCI can be transmitted at a second transmission cycle optimized for power control requirements. This dynamic approach allows the system to adjust the frequency of each control information type independently, improving productivity by matching transmission cycles to actual needs while reducing signaling overhead by avoiding unnecessary transmissions.
Data Source
AI summary
Provided in the embodiments of the present invention are a wireless-network-based communication method, terminal device, and network device. The method comprises: a terminal device detecting first downlink control information (DCI) sent by a network device; a terminal device detecting second DCI sent by a network device; the terminal device joining control information of the first DCI and second DCI so as to send or receive target data. In the embodiments of the present invention, the first DCI and second DCI may carry different types of control information; separately transmitting the first DCI and second DCI satisfies the requirements for transmission of different types of control information; insofar as the requirements for transmission of different types of control information are satisfied, different types of control information are transmitted to the terminal device, such that the terminal device can send or receive target data.