Carrier Segmentation for Control Information Transmission Reliability
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Solution Overview
Problem
High-frequency carrier signals in communications systems face significant path loss and decreased channel receiving quality due to atmospheric and vegetation factors, which cannot be adequately compensated by existing beamforming and retransmission technologies, resulting in poor reliability and quality of control information transmission.
Innovation Solution
A method where a base station sends control information on a lower-frequency carrier and data on a higher-frequency carrier, with the control information indicating the time intervals for data transmission, thereby reducing large-scale loss and improving reliability by leveraging the lower path loss of the lower-frequency carrier.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If beamforming technology is used to transmit common channel or signal on high-frequency carrier, then antenna gain is increased, but coverage of all user equipments in entire cell cannot be ensured and beam cannot be excessively narrow
Solution Approach 1:
The patent segments the transmission system into two separate carriers: a first carrier for control information transmission and a second carrier for data transmission. This segmentation allows each carrier to be optimized for its specific function, with the first carrier using lower frequency for broad coverage and the second carrier using higher frequency for high capacity, resolving the contradiction between antenna gain and coverage area.
2Reliability
If retransmission combining technology is used to enhance reliability of common channel or signal transmission, then transmission reliability is improved, but transmission time is increased and efficiency is reduced
Solution Approach 1:
The patent segments transmission functions across two carriers, placing reliability-critical control information on the first carrier and high-speed data on the second carrier. This allows reliability to be enhanced without significant time penalty for control information, while data transmission benefits from the higher speed of the second carrier.
3Productivity
If high-frequency carrier is used for data transmission, then transmission capacity is increased, but path loss increases and channel receiving quality decreases
Solution Approach 1:
The patent divides the transmission system into two carriers with different frequency characteristics. The first carrier operates at lower frequency for control information with lower path loss, while the second carrier operates at higher frequency for data transmission with higher capacity. This segmentation allows the system to simultaneously achieve low path loss and high capacity.
4Speed
If control information is transmitted on high-frequency carrier, then transmission speed is increased, but reliability and quality of transmission deteriorate due to large-scale loss
Solution Approach 1:
The patent segments control information transmission from data transmission by using separate carriers. Control information is transmitted on the first carrier with lower frequency and higher reliability, while data transmission uses the second carrier with higher frequency and higher speed. This resolves the contradiction between transmission speed and reliability for control information.
Data Source
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AI summary
A control information transmission method, a base station, and user equipment are disclosed. The transmission method includes: sending, by a base station, first control information on a second carrier, where the first control information is used by the base station to send data on a first carrier according to the first control information; and sending, by the base station, the data on the first carrier according to the first control information; where duration of a transmission time interval of the first carrier is less than duration of a transmission time interval of the second carrier. A base station sends data on a first carrier, and sends first control information on a second carrier. Because a frequency of the second carrier is less than a frequency of the first carrier, a large-scale loss on the second carrier is less than a large-scale loss on the first carrier. Therefore, sending the first control information on the second carrier improves reliability of transmission of the first control information.