Cell Reselection Using Operating Modes to Avoid Wake-Up Energy Loss
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Solution Overview
Problem
The challenge in cell reselection processes is selecting an appropriate cell with energy-saving features to minimize energy consumption in base stations, as waking up sleeping devices for data transmission in energy-saving cells increases energy consumption.
Innovation Solution
A method for cell reselection in terminal devices that considers operating modes of neighboring cells, allowing flexible selection to avoid energy-saving cells that require waking up devices for data transmission, using parameters such as cell priorities and operating modes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If base stations adopt energy-saving modes with AAU shutdown and power amplifier shutdown, then energy consumption is reduced, but data transmission requires waking up devices which increases energy consumption
Solution Approach 1:
The terminal device performs preliminary cell reselection before data transmission begins by evaluating operating mode parameters of neighboring cells. This preliminary action allows the terminal to camp on cells with favorable operating modes (non-energy-saving modes) in advance, avoiding the need to wake up sleeping devices during data transmission and thus preventing additional energy consumption while maintaining transmission reliability
2Ease of manufacture
If terminal devices select cells based on signal quality alone, then cell selection is simple, but energy consumption cannot be optimized
Solution Approach 1:
The patent changes the selection parameters from traditional signal quality-only criteria to include operating mode parameters (first parameters) that indicate whether a cell is in an energy-saving mode. By modifying the cell selection criteria to incorporate these additional parameters, the terminal device can identify and select cells with non-energy-saving operating modes, thereby reducing network energy consumption while maintaining a relatively simple selection process
3Loss of energy
If base stations implement energy-saving features like AAU shutdown, then operational costs decrease, but device complexity increases due to wake-up requirements
Solution Approach 1:
The operating mode parameter acts as an intermediary information element that conveys the energy-saving status of a cell to the terminal device. This intermediary parameter enables the terminal to make informed cell selection decisions without needing to understand or manage the complex wake-up mechanisms of base station devices, thus reducing device complexity while achieving energy savings
Data Source
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AI summary
A cell reselection method and an apparatus are provided. The method includes: obtaining a plurality of first parameters related to operating modes, where the operating mode is related to a transmission resource of a network device to which a first cell belongs and/or a function supported by the network device, and the first cell includes a serving cell of a terminal device and/or a neighboring cell of the serving cell; and performing cell reselection based on the first parameters.