5G Terminal SI Request Transmission Mode Selection
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Solution Overview
Problem
In 5G communication systems, the existing methods for transmitting System Information (SI) requests via random access messages 1 (msg1) and 3 (msg3) face challenges such as high signaling overhead, energy consumption, and delay due to collisions when multiple terminals request SI simultaneously, as they do not effectively consider the content of the SI being requested.
Innovation Solution
A method and device for a terminal to determine the transmission mode of SI requests based on pre-stored or configured configuration information, classifying SI into types corresponding to different transmission modes, using msg1 for high-frequency SI and msg3 for low-frequency SI, thereby optimizing the transmission mode to reduce overhead and energy consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If the terminal transmits the other SI request via random access message 1 (msg1), then the request can be transmitted quickly, but the signaling overhead increases and energy consumption increases
Solution Approach 1:
The patent segments the other SI request into two parts: SI request information and other information. The SI request information is transmitted via msg1 for quick access, while the other information is transmitted via msg3. This segmentation allows the critical SI request to be transmitted quickly while reducing the signaling overhead on the random access channel by moving less critical data to msg3.
2Quantity of substance
If the terminal transmits the other SI request via random access message 3 (msg3), then the signaling overhead is reduced, but the transmission delay increases
Solution Approach 1:
The patent segments the other SI request into two parts: SI request information and other information. The SI request information is transmitted via msg1 for quick access, while the other information is transmitted via msg3. This segmentation allows the critical SI request to be transmitted quickly while reducing the signaling overhead on the random access channel by moving less critical data to msg3.
3Speed
If multiple terminals transmit SI requests simultaneously via msg1, then the request transmission is fast, but collisions occur causing energy consumption and delay
Solution Approach 1:
The patent segments the other SI request into two parts: SI request information and other information. The SI request information is transmitted via msg1 for quick access, while the other information is transmitted via msg3. This segmentation allows the critical SI request to be transmitted quickly while reducing the signaling overhead on the random access channel by moving less critical data to msg3.
Solution Approach 2:
The patent applies partial action by transmitting only the essential SI request information via msg1, which is sufficient for the base station to identify and respond to the SI request. The remaining other information is transmitted via msg3. This partial transmission approach reduces the amount of data subject to collision on the random access channel, thereby reducing energy consumption and delay.
4Device complexity
If the existing methods transmit SI requests without considering SI content, then the transmission process is simple, but the signaling overhead and delay increase
Solution Approach 1:
The patent segments the other SI request into two parts: SI request information and other information. The SI request information is transmitted via msg1 for quick access, while the other information is transmitted via msg3. This segmentation allows the critical SI request to be transmitted quickly while reducing the signaling overhead on the random access channel by moving less critical data to msg3.
Data Source
Figure 1A~2
Figure 3~4A
Figure 4B~4C
AI summary
Embodiments of the present disclosure provide methods and devices for transmitting SI. The method includes: when the terminal transmits an other SI request, determining a transmission mode of an other SI request according to configuration information, which is pre-stored by the terminal or configured by a base station; and transmitting the other SI request to the base station according to the transmission mode. The other SI request is used to request for at least one type of other SI and the transmission mode includes transmitting the other SI request via msg1 or msg3.