Relay Terminal System Information Filtering
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Solution Overview
Problem
In cellular communication networks, terminal devices often receive unnecessary system information via relay terminal devices, leading to increased signaling interactions and resource waste due to the lack of knowledge about the specific system information required by the terminal devices.
Innovation Solution
A method where a first terminal device determines the system information required by a second terminal device based on obtained indication information, allowing it to send only the necessary information, reducing signaling interactions and resource waste by using multicast or broadcast messages for efficient information transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the relay terminal device forwards all system information to the terminal device, then the terminal device can receive complete system information, but signaling overhead increases and resources are wasted
Solution Approach 1:
The patent extracts and identifies the specific system information types required by the terminal device through indication information, then forwards only those specific types rather than all system information. This extraction approach reduces signaling overhead while ensuring the terminal device receives exactly what it needs.
Solution Approach 2:
The patent applies local quality by customizing the system information forwarding based on the specific requirements of each terminal device. Different terminal devices receive different subsets of system information according to their individual needs, rather than a uniform approach for all devices.
2Loss of information
If the relay terminal device forwards all system information, then no information is missing, but signaling interactions increase
Solution Approach 1:
The patent extracts only the necessary system information types based on indication information from the terminal device, eliminating unnecessary signaling interactions. This extraction ensures information completeness for the specific device while improving overall signaling efficiency.
Solution Approach 2:
The patent performs preliminary identification of required system information types through indication information before the actual forwarding process. This preliminary action allows the relay terminal device to prepare and forward only the necessary information, reducing subsequent signaling interactions.
3Adaptability or versatility
If unicast messages are sent to each terminal device, then individual information requirements are met, but resource waste occurs
Solution Approach 1:
The patent merges the information delivery process by using group casting or broadcasting to send system information to multiple terminal devices simultaneously. This combining approach maintains adaptability to individual requirements while significantly reducing resource consumption compared to separate unicast transmissions.
Solution Approach 2:
The patent makes the system information forwarding mechanism universal by implementing a standardized indication information exchange protocol that works for different terminal device types and requirements. This universal approach allows the same mechanism to serve multiple devices with different information needs efficiently.
Data Source
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AI summary
Embodiments of the present invention provide a method for transmitting system information and a terminal device. The method includes: obtaining, by a first terminal device, first indication information; determining, by the first terminal device based on the first indication information, system information SI required by a second terminal device, where the second terminal device communicates with a base station via the first terminal device; and sending, by the first terminal device, a message including target SI to the second terminal device, where the target SI is at least some or all of the SI required by the second terminal device. In the embodiments of the present invention, the first terminal device can determine, based on the obtained first indication information, the system information SI required by the second terminal device, so that the first terminal device does not send system information SI not required by the second terminal device to the second terminal device. This reduces signaling interactions between the first terminal device and the second terminal device, reduces signaling overheads, and avoids resource waste.