Satellite Cell Selection Using Dwell Time and Signal Quality
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Solution Overview
Problem
In satellite communication systems, the mobile nature of satellites results in discontinuous coverage regions, making cell selection and reselection challenging due to fixed base station positions in ground communication systems.
Innovation Solution
A satellite communication method that involves receiving target information including dwell time from satellites, allowing user equipment to perform cell selection or reselection based on this information, using signal quality parameters and additional factors to optimize cell choice.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If satellites are used for communication, then coverage area is improved, but cell selection becomes difficult due to discontinuous coverage
Solution Approach 1:
The satellite broadcasts target information including dwell time before the user equipment performs cell selection. This preliminary provision of timing information enables the user equipment to anticipate when satellite cells will be available in different regions, making cell selection feasible despite the discontinuous and mobile nature of satellite coverage.
Solution Approach 2:
The patent introduces dwell time as a dynamic parameter that varies with satellite position and movement. Instead of static cell selection based on fixed base station positions, the system dynamically adjusts cell selection decisions based on the satellite's current dwell time in each region, allowing adaptive selection that accounts for satellite mobility.
2Ease of operation
If cell selection is performed without dwell time information, then operation is simple, but communication availability deteriorates
Solution Approach 1:
Dwell time information acts as an intermediary parameter that bridges the satellite's mobile coverage and the user equipment's cell selection process. This intermediate information layer enables reliable communication availability by providing the timing context needed to make informed cell selection decisions without complicating the basic operation.
3Adaptability or versatility
If satellites move continuously, then coverage flexibility is improved, but coverage continuity deteriorates
Solution Approach 1:
The patent treats satellite coverage as periodic action by utilizing dwell time - the periodic intervals when the satellite passes over or near specific regions. By scheduling cell selection around these periodic dwell events, the system maintains coverage continuity despite the satellite's continuous movement, transforming mobility into a predictable periodic pattern.
Data Source
AI summary
A satellite communication method, includes: receiving target information sent by at least one satellite; in which, the target information at least includes dwell time defining when cells of the at least one satellite dwells in one or more regions; and performing cell selection or cell reselection at least based on the target information.