Inter-Frequency Measurement Time Determination for Dual-Mode UE
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In the 3G mobile communication system, dual mode User Equipment (UE) supporting WCDMA FDD and TDD modes face inaccuracies in inter-frequency measurement performance when performing inter-frequency measurements to TDD cells, as the measurement time calculated or indicated by existing methods does not consider the frame structure of the TDD system, leading to incomplete reception of timeslots containing system information.
Innovation Solution
A method and element for determining measurement time that ensures the whole timeslot containing the PCCPCH mapped from the broadcast channel is found within the measurement time, allowing for accurate evaluation of inter-frequency measurement performance by taking this time as the valid measurement time.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the measurement time is calculated or indicated by existing methods without considering TDD frame structure, then the measurement process is simpler, but the measurement precision deteriorates because the timeslot containing system information may not be completely received
Solution Approach 1:
The patent changes the measurement time determination from a fixed or simply indicated time to a dynamically adjusted time that accounts for TDD frame structure. Specifically, it identifies the position of timeslots containing PCCPCH within the TDD frame structure and adjusts the measurement time to ensure complete reception of these critical timeslots, thereby improving measurement precision without excessive complexity
Solution Approach 2:
The patent performs preliminary identification of the timeslot structure and PCCPCH position before executing the inter-frequency measurement. By determining the TDD frame structure and locating the timeslot containing system information in advance, the measurement process can be properly synchronized and timed to ensure complete reception of critical information
2Measurement precision
If the measurement time is extended to ensure complete timeslot reception, then the measurement precision improves, but the loss of time increases
Solution Approach 1:
The patent applies local quality by focusing the extended measurement time specifically on the critical portion - the timeslot containing PCCPCH with system information. Rather than uniformly extending measurement time across all frequencies and cells, it针对性地 (targeted) extends the time only where necessary to capture the essential system information, thereby minimizing overall time loss while ensuring measurement precision
Data Source
AI summary
The invention provides a method and an element for determining a measurement time of an inter-frequency measurement, used for the dual mode UE supporting FDD mode and TDD mode in the FDD mode to perform the inter-frequency measurement to the TDD cell. If a whole timeslot is found within the measurement time, the PCCPCH mapped from the broadcast channel bearing the system information being located in the timeslot, the measurement time is taken as the valid measurement time for measuring the measurement performance. Accordingly, a method for measuring inter-frequency is also provided. A credible valid measurement time and a credible inter-frequency measurement may be realized according to the invention. Thus, the accuracy for evaluating the measurement performance and the measurement accuracy may be improved.