Relay Terminal System Information Relaying in 5G Networks
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Solution Overview
Problem
In wireless communication systems, particularly in 5G networks, there is a challenge in efficiently relaying common signals between a base station and a remote terminal through sidelinks, especially when the remote terminal is outside the coverage area of the base station, as existing methods lack effective mechanisms for request and delivery of system information and paging messages.
Innovation Solution
A method and apparatus for a relay terminal to recognize relay requests from remote terminals, acquire system information from the base station, and transmit it to the remote terminal, as well as receive and relay paging messages, using specific identification information and transmission schemes such as PRACH sequences, unicast, broadcast, or groupcast transmission, to ensure seamless communication even when the remote terminal is out of coverage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a relay terminal relays system information and paging messages to remote terminals outside base station coverage, then communication reliability is improved, but device complexity and resource allocation difficulty increase
Solution Approach 1:
The relay terminal acts as an intermediary between the base station and remote terminals outside coverage. It receives system information and paging messages from the base station and forwards them to remote terminals, enabling communication reliability for devices that cannot directly access the base station while managing the complexity through a standardized relay mechanism.
Solution Approach 2:
The relay terminal performs multiple functions including receiving system information from the base station, relaying it to remote terminals, receiving paging messages, and forwarding them appropriately. This multi-functionality consolidates what would otherwise require separate mechanisms into a single versatile component, managing complexity while improving reliability.
2Reliability
If the relay terminal monitors all paging occasions for remote terminals, then paging reliability is improved, but power consumption increases
Solution Approach 1:
The relay terminal monitors only the necessary paging occasions required to service remote terminals under its coverage, rather than monitoring all possible paging occasions continuously. This partial monitoring approach maintains adequate paging reliability while significantly reducing the power consumption of the relay terminal.
Solution Approach 2:
The relay terminal performs paging message reception and forwarding in periodic cycles corresponding to paging occasion structures, rather than continuous monitoring. This periodic operation allows the relay terminal to enter low-power states between paging occasions while maintaining reliable paging delivery when needed.
3Productivity
If the relay terminal transmits system information on demand to remote terminals, then communication efficiency is improved, but resource allocation complexity increases
Solution Approach 1:
The relay terminal dynamically allocates resources for transmitting system information to remote terminals based on actual demand and current system conditions. Rather than using fixed resource allocation, the relay terminal adjusts transmission timing and resources adaptively, improving communication efficiency while managing allocation complexity through flexible, condition-based decisions.
Data Source
AI summary
An operation method of a relay terminal for relaying radio communication between a base station and a remote terminal may comprise: recognizing a relay request of the remote terminal for system information provided by the base station; acquiring the system information from the base station; and transmitting the system information to the remote terminal.