Multi-SIM MDT Transfer Before RRC Connection Setup
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Solution Overview
Problem
In multi-SIM mobile devices, existing MDT technologies fail to efficiently collect and transmit MDT information from SIM cards that are not in a connected state, leading to incomplete network performance data at the base station.
Innovation Solution
A method for a multi-SIM device to determine and transmit MDT information from SIM cards or memory before establishing an RRC connection, using indication signals to coordinate data transfer and ensure timely collection by the base station.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If the terminal only transmits MDT information from the actively connected SIM card, then the transmission process is simple, but the MDT information is incomplete and delayed
Solution Approach 1:
The terminal performs preliminary actions by determining and preparing MDT information from multiple SIM cards before establishing the RRC connection. The terminal identifies which SIM cards have MDT information stored and prepares this information in advance, so that when the base station requests MDT information, it can immediately transmit comprehensive data from all SIM cards without delay or incomplete information.
2Reliability
If the terminal determines MDT information from multiple SIM cards before connection, then the base station obtains complete data, but the processing time and complexity increase
Solution Approach 1:
The terminal performs self-service by autonomously determining which SIM cards contain MDT information and preparing this information before the base station requests it. The terminal independently identifies the relevant SIM cards, retrieves their MDT information, and has it ready for transmission, eliminating the need for the base station to manage multiple SIM card queries and reducing overall processing time.
3Speed
If the terminal sends MDT information after RRC connection establishment, then the connection setup is straightforward, but the MDT information transmission is delayed
Solution Approach 1:
The terminal performs preliminary action by determining and preparing MDT information from multiple SIM cards before the RRC connection is established. This advance preparation ensures that when the base station requests MDT information immediately after connection, the terminal can transmit complete data without delay, achieving fast transmission without increasing connection management complexity.
Data Source
AI summary
A method for sending MDT information, is implemented in a terminal, wherein a plurality of SIM cards are arranged in the terminal, the method includes: determining first MDT information stored in SIM cards other than a first SIM card among the plurality of SIM cards and/or a memory of the terminal, before the first SIM card establishes an RRC connection with a base station; and sending, by the terminal, the first MDT information to the base station.