Remote Terminal System Information Request via Relay
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Solution Overview
Problem
In communication systems, remote terminal devices without valid system information stored may face challenges in requesting necessary system information, especially when they are not on a bandwidth part configured with a common search space.
Innovation Solution
The method involves sending a system information request message from a remote terminal device to a network device or a relay terminal device, carrying a requested system information identifier, to obtain the required system information.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a remote terminal device sends an RRC message to request system information, then the terminal device can obtain necessary system information, but the communication overhead increases and the complexity of the communication protocol increases
Solution Approach 1:
The patent introduces a relay terminal device as an intermediary between the remote terminal device and the network device. The relay terminal device receives system information from the network device and forwards it to the remote terminal device, enabling the remote terminal to obtain system information without directly interacting with the network device, thus reducing protocol complexity while maintaining reliability
Solution Approach 2:
The relay terminal device performs multiple functions: it acts as a normal terminal for communication with the network device, simultaneously serves as a relay for system information transmission to remote terminals, and manages the system information caching and forwarding processes. This multi-functionality reduces the need for separate dedicated mechanisms
2Reliability
If the terminal device is on a BWP without common search space configured, then the terminal device cannot search for system information through normal means, but the terminal device still needs to obtain system information for cell access
Solution Approach 1:
The relay terminal device serves as an intermediary that bridges the gap between the remote terminal device on the BWP without common search space and the network device. It receives system information from the network device and forwards it to the remote terminal device, enabling information retrieval despite the lack of common search space configuration
Solution Approach 2:
The network device performs preliminary action by broadcasting system information before the remote terminal device needs it. The relay terminal device caches this preliminary information and makes it available to the remote terminal device, ensuring system information is available when needed without requiring the remote terminal to perform search operations
Data Source
AI summary
A method for requesting system information is performed by a remote terminal device, and includes: sending a system information request message, in a case that no valid system information is stored in the remote terminal device, wherein the system information request message carries a requested system information identifier.