Relay Radio Terminal Paging Message Handling
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Solution Overview
Problem
Current relay radio terminals in mobile communication systems face challenges in effectively relaying paging messages and system information between a base station and a remote radio terminal, particularly in determining when both the relay radio terminal and the remote radio terminal are called, and in managing system information updates across established end-to-end radio links.
Innovation Solution
A relay radio terminal is configured to receive paging messages and system information from a base station and determine whether to relay this information to a remote radio terminal based on specific conditions, such as the inclusion of its own identifier in the message, the presence of an indicator for its own call, and the establishment or update of an end-to-end radio link, allowing for efficient communication in both idle and connected modes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the relay radio terminal relays all paging messages received from the base station to the remote radio terminal, then the remote terminal can be properly notified, but the relay terminal may incorrectly process messages not intended for it, increasing processing overhead and potential errors
Solution Approach 1:
The relay terminal applies different processing rules to different paging messages based on local conditions. It checks whether its own identifier is included in the paging message and applies specific relay logic only when appropriate, rather than uniformly relaying all messages. This localized processing approach reduces unnecessary operations while maintaining reliable message delivery.
Solution Approach 2:
Instead of the conventional approach where the relay terminal relays all received paging messages, this invention inverts the logic by having the relay terminal selectively relay only those messages where its own identifier is included or where specific relay conditions are met. This inversion reduces processing complexity while maintaining reliability.
2Reliability
If the relay radio terminal continuously monitors for system information updates to relay to the remote terminal, then the remote terminal receives timely updates, but the relay terminal consumes more energy and processing resources
Solution Approach 1:
The relay terminal monitors for system information updates periodically rather than continuously. It checks for updates at specific intervals or triggered by specific events (such as when the end-to-end radio link is established or updated), reducing energy consumption while ensuring timely delivery of critical updates to the remote terminal.
Solution Approach 2:
The relay terminal performs preliminary checks to determine whether system information updates need to be relayed before actually conducting the relay operation. By evaluating conditions such as whether the end-to-end radio link is established and whether the remote terminal is reachable, the terminal avoids unnecessary monitoring and processing, thereby reducing energy consumption while maintaining update timeliness.
3Reliability
If the relay radio terminal establishes an end-to-end radio link with the remote terminal before relaying system information, then information accuracy is ensured, but the connection establishment time delays the information delivery
Solution Approach 1:
The relay terminal performs preliminary actions to establish or verify the end-to-end radio link with the remote terminal before relaying system information. By checking whether the link is already established or can be quickly verified, the terminal ensures information accuracy while minimizing the time delay. If the link is already established, no additional setup time is required.
Solution Approach 2:
The relay terminal applies partial action by establishing the end-to-end radio link only when necessary for system information relay, rather than maintaining continuous links for all operations. This selective approach ensures information accuracy when needed while reducing overall connection establishment time and resource consumption.
Data Source
AI summary
A relay radio terminal according to a first aspect performs a process for relaying communication between a base station and a remote radio terminal in a mobile communication system. In a state in which the relay radio terminal is in an idle mode and an end-to-end radio link between the relay radio terminal and the remote radio terminal is established, the controller is configured to perform a process of receiving, from the base station, a paging message including an identifier of the remote radio terminal as a call destination in a paging reception opportunity of the relay radio terminal, and a process of determining whether not only the remote radio terminal but also the relay radio terminal is called, in response to reception of the paging message.