RRC Uplink Enhancement for Stable Satellite Initial Access
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Solution Overview
Problem
Satellite communication systems face significant signal path loss and low uplink transmission performance due to high satellite movement speed and long signal propagation distances, hindering stable initial access of user equipment (UE) in scenarios like space, aviation, and maritime communication.
Innovation Solution
A communication method involving the use of RRC connection setup messages to request and indicate uplink data transmission enhancements, such as transport block over multi-slot technology and transport block scaling, to improve uplink performance by reporting terminal device capabilities and determining necessary enhancements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If satellite serves as base station with high movement speed and long signal propagation distance, then coverage area is improved, but signal path loss increases
Solution Approach 1:
The patent changes the transmission parameter by enabling the terminal device to request and the network device to configure transport block over multi-slot technology, which transmits one transport block across multiple slots with repetition, thereby improving uplink transmission performance and overcoming signal path loss in satellite communication scenarios
2Adaptability or versatility
If satellite serves as base station, then communication service coverage is improved, but uplink transmission performance deteriorates
Solution Approach 1:
The patent implements preliminary action by having the terminal device report its capability to support transport block over multi-slot technology in advance during RRC connection setup, allowing the network device to pre-configure appropriate uplink transmission parameters before actual data transmission, thereby ensuring reliable uplink performance in satellite communication
3Device complexity
If conventional RRC connection setup is used without uplink enhancement, then device complexity is reduced, but initial access performance deteriorates
Solution Approach 1:
The patent segments the capability reporting process by introducing specific indication information in the RRC connection setup message that separately identifies support for transport block over multi-slot technology, allowing the network to selectively apply enhancement configurations only when needed, thus maintaining low complexity for conventional devices while improving performance for capable devices
Data Source
Figure 1A~1C
Figure 2A~2B
Figure 3A~4
AI summary
A communication method and a related apparatus are provided, and relate to the field of communication technologies. The method includes: A terminal device sends first information to a network device, and receives second information from the network device. Correspondingly, the network device receives the first information from the terminal device, and sends the second information to the terminal device. The first information is used to request uplink data transmission enhancement corresponding to the terminal device, and the first information is carried in a radio resource control RRC connection setup message of the terminal device. The second information indicates uplink data transmission enhancement corresponding to the terminal device. According to the method, the information for requesting uplink data transmission enhancement corresponding to the terminal device is carried in the RRC connection setup message, so that the network device can determine that uplink transmission performance of the terminal device needs to be enhanced. In this way, a signal path loss of a communication signal between the terminal device and the network device is overcome, and the uplink transmission performance is improved, so that the terminal device stably completes initial access.