Cell Discovery Method for Targeted Signal Measurement
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Solution Overview
Problem
Current cell discovery methods in radio communications systems require user equipment to perform large-scale, power-consuming searches for neighboring cells, which inefficiencies and high power consumption.
Innovation Solution
A method where base stations exchange and broadcast radio frequency information to guide user equipment in performing targeted signal strength and quality measurements, reducing the search scope and conserving power by instructing measurements only when matching frequency information is detected.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If user equipment performs large-scale blind search and measurement on neighboring cells, then cell discovery capability is improved, but power consumption increases
Solution Approach 1:
The base station performs preliminary actions by determining handover area frequency information in advance and providing it to user equipment before the actual cell search and measurement process begins. This allows user equipment to limit its search to specific frequencies rather than performing blind large-scale searches across all possible frequencies, thereby reducing power consumption while maintaining cell discovery capability
Solution Approach 2:
The patent applies local quality by making the cell search and measurement process targeted rather than uniform. User equipment performs measurement only on specific frequencies identified as relevant to the handover area, rather than uniformly searching all frequencies. This localized approach to measurement reduces overall power consumption while maintaining effective cell discovery in the handover region
2Measurement precision
If user equipment performs comprehensive signal measurement on all neighboring cells, then handover accuracy is improved, but search time increases
Solution Approach 1:
The patent extracts only the relevant frequency information needed for handover from the complete set of possible frequencies. The base station determines and provides handover area frequency information that identifies which specific frequencies are relevant, allowing user equipment to extract and measure only those signals rather than comprehensively measuring all possible neighboring cells across all frequencies, thus reducing search time while maintaining handover accuracy
Solution Approach 2:
The base station performs preliminary analysis to identify handover area frequency information before instructing user equipment to measure. This preliminary action filters out irrelevant frequencies in advance, so user equipment doesn't waste time searching frequencies that won't lead to handover opportunities, thereby reducing overall search time while preserving measurement precision on relevant cells
Data Source
AI summary
A cell discovery method, device, and system are disclosed, which relate to the radio communications field, so as to purposefully perform small-scale search and measurement, thereby improving the search efficiency and saving power. The method includes: after receiving first radio frequency information of a handover area and second radio frequency information reported by a user equipment served by a cell of a first base station, detecting, by the first base station, whether the second radio frequency information matches the first radio frequency information; if match, sending a measurement instruction message to the user equipment that reports the second radio frequency information, so as to instruct the user equipment to measure signal strength and/or signal quality of a cell at a frequency of a cell of a second base station or only of the cell of the second base station. Solutions disclosed are used for cell search and discovery.