Multi-stage Segmented Downlink Control Information Overhead Reduction
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Solution Overview
Problem
Current wireless communication systems face challenges in reducing overhead associated with transmitting downlink control information, particularly in next-generation 5G networks, where redundant data transmissions occur due to the repetition of common downlink control information across multiple channels.
Innovation Solution
The system implements multi-stage segmentation of downlink control information, identifying and transmitting common information only once, while incremental information is sent separately across different channels, reducing redundant data transmissions and overhead by optimizing the transmission frequency and domain.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If common downlink control information is transmitted across multiple channels, then reliability of control information delivery is improved, but overhead and redundant data transmissions increase
Solution Approach 1:
The patent segments downlink control information into common information and UE-specific information. The common information is transmitted once in a first downlink control channel, while UE-specific information is transmitted in subsequent downlink control channels. This segmentation eliminates redundant transmissions of common information across multiple channels while maintaining reliable delivery through the structured transmission approach.
2Reliability
If downlink control information is transmitted multiple times across different channels, then coverage and delivery assurance are improved, but power consumption in user equipment increases
Solution Approach 1:
By segmenting control information into common and UE-specific portions, the system transmits common information only once initially, reducing the number of times user equipment must decode and process control information. This segmentation directly reduces power consumption while maintaining delivery assurance through the structured transmission of remaining UE-specific information.
Solution Approach 2:
The patent applies partial action by transmitting only the necessary UE-specific information in subsequent channels after the common information has been transmitted once. This avoids excessive action (re-transmitting all common information) while ensuring sufficient delivery assurance through the partial re-transmission of only needed information.
3Reliability
If all downlink control information is retransmitted in each channel, then completeness of information is ensured, but spectral efficiency decreases
Solution Approach 1:
The patent segments downlink control information to transmit common information only once and UE-specific information in subsequent channels. This segmentation ensures completeness by including all necessary information in the first transmission and supplementing with only the necessary UE-specific portions in subsequent transmissions, thereby maximizing spectral efficiency by avoiding redundant transmissions.
Solution Approach 2:
The patent extracts the common information from repeated transmissions across multiple channels. By taking out the common information and transmitting it only once initially, the system eliminates redundancy while maintaining completeness through the extraction and separate transmission of only the necessary UE-specific information in subsequent channels.
Data Source
AI summary
Various embodiments disclosed herein provide for multi-stage segmentation of downlink control information. Downlink control information can arrive at a user equipment on more than one channel, setting up and configuring data channels for different base stations, or data channels for the same base station but where the data channels are in different frequency domains or time domains. The downlink control information segmentation system disclosed herein can determine when downlink control information for the user equipment is common across a plurality of downlink control channels, and ensure that the downlink control information is sent just one time, to avoid redundant data transmissions and increased overhead.