Base Station Notification for Timely D2D Resource Updates
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
UEs using D2D resource configurations from second cells face battery power consumption due to frequent reading of unchanged system information or miss updated configurations due to infrequent reading, leading to expired resource configurations.
Innovation Solution
A second base station sends indication messages to a first base station, which then notifies the UE to acquire updated system information of the second cell, allowing timely updates without frequent periodic checks.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the UE frequently reads the system information of the second cell, then the UE can acquire updated D2D resource configurations in time, but the battery power of the UE is consumed, shortening the standby time
Solution Approach 1:
The second base station monitors whether the UE has successfully acquired the system information and provides feedback by sending indication messages to notify the UE of updates, replacing the UE's active periodic reading mechanism with a passive notification-based approach
Solution Approach 2:
The second base station acts as an intermediary between the system information and the UE, actively pushing update notifications to the UE through the first base station, thereby eliminating the need for the UE to continuously monitor and read system information
2Use of energy by moving object
If the period in which the UE reads the system information of the second cell is set to be relatively long, then the battery power of the UE is conserved, but the D2D resource configuration of the second cell may have changed but is not read by the UE in time, resulting in the UE using an expired D2D resource configuration
Solution Approach 1:
The second base station performs preliminary actions by monitoring system information changes and preparing indication messages in advance, notifying the UE before the UE would naturally need to read the updated system information, ensuring the UE always has valid configuration without frequent reading
3Reliability
If the UE periodically reads the system information of the second cell, then the UE can maintain valid D2D resource configuration, but the operation complexity and signaling overhead increase
Solution Approach 1:
The system transitions from a UE-initiated periodic reading mechanism to a base station-driven feedback mechanism where the second base station actively notifies the UE of changes, simplifying the UE's operation while maintaining configuration validity
Solution Approach 2:
The second base station serves itself by monitoring its own system information changes and automatically generating notification messages, eliminating the need for complex UE-side periodic reading and processing mechanisms
Data Source
Figure 1~2
Figure 3~5
Figure 6~7
AI summary
The present invention discloses an information notification method, a user terminal, a first base station, and a second base station. UE receives a notification message that is sent by a first base station by using a managed first cell, where the notification message is used to instruct the UE to acquire system information of a second cell managed by a second base station; and the UE acquires, according to the received notification message, the system information of the second cell managed by the second base station. A D2D resource configuration of the second cell changes but is not read by the UE in time, resulting in a problem that the UE uses an expired D2D resource configuration.