Cell Search Optimization Using Historical Access Data
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Solution Overview
Problem
In next-generation communications systems, such as 5G, terminal devices face inefficiencies in cell search due to uncertainty and discontinuity of base station distribution, leading to increased time and power consumption during the process of accessing base stations with different frequencies.
Innovation Solution
A cell search method where terminal devices obtain historical access information from nearby devices to determine the presence of cells at a location, adjusting search parameters such as search carrier frequency, location change threshold, maximum search times, and search period to optimize cell search efficiency, thereby reducing unnecessary searches and power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If terminal devices perform cell search multiple times due to uncertainty and discontinuity of base station distribution, then the probability of finding cells is improved, but time consumption and power consumption increase
Solution Approach 1:
The patent applies preliminary action by having terminal devices obtain historical access information from nearby devices before performing cell search. This pre-acquisition of location and access data allows terminal devices to predict likely cell locations and frequencies, reducing the need for multiple exhaustive searches and thereby decreasing search time while maintaining success rate
Solution Approach 2:
The patent implements feedback mechanisms where terminal devices share their location information and cell access results with nearby devices. This creates a collective knowledge base that continuously improves search efficiency through feedback loops, allowing the system to learn from past access patterns and optimize future searches
2Reliability
If terminal devices perform cell search multiple times due to uncertainty and discontinuity of base station distribution, then the probability of finding cells is improved, but power consumption increases
Solution Approach 1:
By acquiring historical access information before cell search, terminal devices can pre-identify potential cell locations and frequencies, reducing the number of search operations required and thereby lowering power consumption while maintaining reliable access
3Productivity
If terminal devices search for cells without adjusting search parameters, then the search process is simple, but search efficiency is low
Solution Approach 1:
The patent applies parameter changes by dynamically adjusting search parameters such as search frequency ranges and location thresholds based on historical access information. This allows the system to optimize search efficiency for different scenarios while managing complexity through systematic parameter adaptation
Data Source
AI summary
A cell search method and a communications apparatus are provided. The method includes the following: before searching for a cell, a terminal device may determine, with reference to historical access information of another terminal device, whether there is a cell at the location, and adjust, based on a determining result, a value of a search parameter used to search for a cell. For example, if there is a cell, the terminal device may adjust the search parameter to accelerate a search. If there is no cell, the terminal device may perform no search, or adjust the search parameter to reduce an unnecessary cell search performed by the terminal device, so that power consumption of the terminal device can be reduced.