Cell Reselection Indicator Reduces UE Power and System Load
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Solution Overview
Problem
The existing cell reselection procedure in wireless communication systems, which relies solely on signal measurement by user equipment (UE), leads to unnecessary system load and power consumption, as it does not effectively consider system factors like camp load and traffic load, thereby impacting the quality of service, especially in scenarios with high mobility.
Innovation Solution
A method is introduced where the UE performs cell reselection based on a cell reselection indicator and priority, allowing the base station to control the procedure by providing criteria that reduce unnecessary cell searches and optimize power consumption, thereby managing system load more efficiently.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If cell reselection is performed using only signal measurement by UE, then cell selection based on signal quality is achieved, but system load increases and power consumption increases
Solution Approach 1:
The base station performs preliminary actions by calculating cell load information and determining cell reselection indicators before the UE performs cell reselection. The BS provides cell reselection indicators to UEs, which include information about system load conditions. This allows UEs to make informed cell reselection decisions without performing exhaustive signal measurements on all cells, thereby reducing power consumption while maintaining reliable cell selection.
2Reliability
If cell reselection is performed using only signal measurement by UE, then cell selection based on signal quality is achieved, but system load increases
Solution Approach 1:
The base station acts as an intermediary between multiple UEs and the cell reselection process. Instead of each UE independently measuring all cells (which creates high system load), the BS collects cell load information, calculates cell reselection indicators, and provides this information to UEs. This intermediary role distributes the computational burden and reduces overall system load while maintaining cell selection quality.
3Reliability
If cell reselection is performed using only signal measurement by UE, then cell selection based on signal quality is achieved, but unnecessary cell search operations occur
Solution Approach 1:
The base station performs preliminary actions by calculating cell load information and determining cell reselection indicators before the UE performs cell reselection. The BS provides cell reselection indicators to UEs, which include information about system load conditions. This allows UEs to make informed cell reselection decisions without performing exhaustive signal measurements on all cells, thereby reducing power consumption while maintaining reliable cell selection.
Solution Approach 2:
Instead of requiring UEs to perform complete signal measurements on all possible cells (excessive action), the invention uses partial information provided by the base station in the form of cell reselection indicators. These indicators contain sufficient information for UEs to make cell reselection decisions without performing full measurements on all cells, thus reducing unnecessary cell search operations while maintaining selection quality.
Data Source
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AI summary
A method of performing a cell reselection procedure in a wireless communication system includes evaluating priorities of a serving cell and neighbor cells, each of which use different frequency bands, performing inter-frequency measurement on a neighbor cell which has a higher priority than the serving cell, performing the inter-frequency measurement on a neighbor cell which has an equal or lower priority than the serving cell, when a signal characteristic of the serving cell is less than a threshold, and performing cell reselection according to the priorities.