Idle Mode Cell Reselection via Redistribution Parameters
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Solution Overview
Problem
Current wireless communication systems, such as LTE, face challenges in efficient cell reselection, particularly in idle mode, which affects load balancing and increases power consumption due to unnecessary frequency movements of user equipment (UEs).
Innovation Solution
A method for user equipment to perform cell reselection in idle mode by receiving system information containing redistribution parameters, triggering a redistribution procedure, and selecting a redistribution target based on current and previous redistribution statistic information, minimizing power consumption and optimizing load balancing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If user equipment performs frequent cell reselection to maintain connectivity, then network coverage and connectivity are improved, but power consumption increases due to unnecessary frequency movements
Solution Approach 1:
The system performs preliminary cell reselection in idle mode before the UE needs to connect, using redistribution parameters and statistic information to pre-position UEs on appropriate frequencies. This preliminary action prevents last-minute reselection movements that would consume power, while ensuring connectivity is maintained when needed.
Solution Approach 2:
The system uses redistribution statistic information as feedback to monitor and adjust cell reselection behavior. By analyzing historical reselection data and current network conditions, the system optimizes frequency selection to maintain connectivity while minimizing unnecessary movements that waste power.
2Use of energy by moving object
If user equipment stays on current frequency to save power, then power consumption is reduced, but load balancing deteriorates causing network congestion
Solution Approach 1:
The system performs preliminary load distribution by sending redistribution parameters to UEs in idle mode, guiding them to select target frequencies that balance network load. This preliminary action distributes traffic evenly across the network before congestion occurs, maintaining network efficiency while UEs remain stationary and consume less power.
Solution Approach 2:
UEs autonomously perform cell reselection by themselves using redistribution parameters and statistic information, without requiring network-controlled handovers. This self-service mechanism allows UEs to independently optimize their frequency selection for both power saving and load balancing, contributing to overall network efficiency.
3Speed
If cell reselection is performed without considering redistribution statistics, then reselection speed is improved, but load balancing capability deteriorates
Solution Approach 1:
The system performs preliminary calculations and preparations for cell reselection by providing UEs with pre-computed redistribution parameters and statistic information. This preliminary action enables UEs to make fast reselection decisions using ready-made data, achieving both high reselection speed and effective load balancing without real-time network intervention.
Data Source
AI summary
Disclosed are a method and apparatus for performing a cell reselection by a user equipment in idle mode in a wireless communication system. The present invention includes receiving system information containing redistribution parameters, triggering a redistribution procedure, and selecting a redistribution target based on the redistribution parameters. Particularly, the redistribution parameters contain current redistribution statistic information and the redistribution target is selected based on the current redistribution statistic information.