Radio Terminal MDT Configuration for Unlicensed Band RSSI
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current mobile communication systems, particularly in the 3GPP framework, face challenges in optimizing network performance through Minimization of Drive Tests (MDT) functions, especially when utilizing unlicensed frequency bands for LTE communication, as they lack efficient methods for measuring radio environment conditions and reporting location information effectively.
Innovation Solution
A radio terminal and processor configuration that supports MDT by receiving configuration information for RSSI measurements in unlicensed frequency bands, performing these measurements, and transmitting results along with location information to the network, including features like average RSSI calculation, threshold comparisons, and auxiliary data transmission, to enhance network optimization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If MDT function is implemented to measure radio environment and report location information, then network optimization capability is improved, but the system lacks efficient methods for measuring RSSI in unlicensed frequency bands and reporting location information effectively
Solution Approach 1:
The base station pre-configures the terminal with measurement parameters including RSSI measurement frequency bands (particularly unlicensed bands), measurement windows, and location information acquisition methods before the terminal performs measurements. This preliminary configuration enables the terminal to efficiently conduct measurements without requiring complex real-time negotiation, thus improving measurement efficiency while enhancing network optimization capability
Solution Approach 2:
The patent introduces a structured measurement report as an intermediary carrier that consolidates RSSI measurement results, location information, and timing data. This report format serves as a mediator between the terminal's measurement capabilities and the base station's optimization needs, enabling efficient information exchange and resolving the difficulty in effective reporting
2Measurement precision
If configuration information includes RSSI measurement window settings, then measurement precision is improved, but device complexity increases
Solution Approach 1:
The base station determines and configures the RSSI measurement window parameters (start time, duration, frequency) in advance before the terminal performs measurements. This preliminary determination of measurement timing and parameters allows the terminal to simply execute pre-specified measurement tasks rather than making complex decisions, thereby achieving precise measurements while keeping terminal complexity low
Solution Approach 2:
The patent enables dynamic adjustment of measurement parameters (frequency band, measurement window timing, averaging period) through base station configuration. By changing these parameters adaptively based on network conditions, the system achieves high measurement precision without requiring the terminal to have fixed complex measurement logic for all scenarios
Data Source
AI summary
A radio terminal according to one embodiment supports MDT. The radio terminal comprises: a receiver configured to receive configuration information from a network, the configuration information setting an RSSI measurement in an unlicensed frequency band and an acquisition of location information of the radio terminal; a controller configured to perform the RSSI measurement and the acquisition of the location information, based on the configuration information; and a transmitter configured to transmit an RSSI measurement result together with the location information, to the network.