PLMN Reselection Measurement Reporting to Prevent Misrouted 5G Results
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Solution Overview
Problem
In conventional wireless communication systems, terminals in idle or inactive states may report measurement results to a new Public Land Mobile Network (PLMN) that is not related to the previously measured PLMN during reselection, leading to potential misreporting of measurement data.
Innovation Solution
The method involves identifying connection failures with the primary cell, storing cell and beam level measurement information, and transmitting this information to the base station in a specific order, ensuring that only relevant measurement results are reported.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If the terminal performs early measurement reporting during PLMN reselection, then the measurement speed and responsiveness are improved, but the accuracy and relevance of measurement results deteriorate due to potential misreporting to unrelated PLMNs
Solution Approach 1:
The terminal performs PLMN identification and comparison before transmitting measurement results. The network configures the terminal with a list of PLMNs for which early measurement is intended, and the terminal checks whether the detected PLMN matches any in the configured list before reporting, preventing misreporting to unrelated PLMNs
Solution Approach 2:
The network provides feedback by configuring the terminal with a specific list of PLMNs (targetPLMN-IdentityList) for which measurement reporting should be performed. This feedback mechanism ensures the terminal only reports measurements for the intended PLMNs, maintaining result accuracy while enabling fast reporting
2Productivity
If the terminal reports measurement results to any detected PLMN, then the reporting process is simplified and faster, but the reliability of the measurement reporting system deteriorates due to irrelevant data being reported
Solution Approach 1:
The network pre-configures the terminal with a list of target PLMNs (targetPLMN-IdentityList) before the terminal begins measurement and reporting. This preliminary configuration ensures that the terminal has clear criteria for determining which PLMN measurements should be reported, maintaining both efficiency and reliability
Solution Approach 2:
The invention introduces a new parameter (targetPLMN-IdentityList) that changes the reporting behavior from unconditional to conditional. By adding this parameter to the measurement configuration, the system maintains fast reporting while ensuring only relevant measurements are reported to the correct PLMNs
Data Source
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AI summary
The present disclosure relates to a communication method and system for converging a 5th-Generation (5G) communication system for supporting higher data rates beyond a 4th-Generation (4G) system with a technology for Internet of Things (IoT). The present disclosure may be applied to intelligent services based on the 5G communication technology and the IoT-related technology, such as smart home, smart building, smart city, smart car, connected car, health care, digital education, smart retail, security and safety services. The present invention relates to a method performed by a terminal in a wireless communication system. The method includes identifying a failure of connection with a primary cell (PCell) serving the terminal; storing cell level measurement information for the PCell and beam level measurement information for the PCell; transmitting, to a base station, a first message including an indicator indicating that reporting of information related to the connection failure is available; receiving, from the base station, a second message requesting the information related to the connection failure; and in response to the second message, transmitting, to the base station, a third message including the stored cell level measurement information and the stored beam level measurement information, wherein at least one measurement value for at least one reference signal related to the PCell is arranged in descending order and stored in the beam level measurement information.