EN-DC Cell Reselection Priority Handling for Efficient Frequency Use
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Solution Overview
Problem
Existing methods for cell reselection in evolved-universal terrestrial radio access network (E-UTRAN) new radio-dual connectivity (EN-DC) terminals do not effectively utilize cell reselection priority configuration information broadcasted by base stations, leading to inefficient frequency management.
Innovation Solution
A method for performing cell reselection by terminals using cell reselection priority configuration information broadcasted from base stations through system information, enabling effective frequency management.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If terminals use existing cell reselection methods without prioritized configuration information, then cell reselection can be performed, but frequency management efficiency is poor and battery consumption is high
Solution Approach 1:
The base station performs preliminary actions by broadcasting cell reselection priority configuration information before the terminal performs cell reselection. This allows the terminal to have advance knowledge of which frequencies to prioritize, reducing unnecessary measurements and computations, thereby improving frequency management efficiency and reducing battery consumption.
2Productivity
If terminals perform cell reselection without prioritized frequency information, then cell reselection is possible, but network efficiency is reduced
Solution Approach 1:
The base station provides prioritized frequency information in advance through system information broadcasting. This preliminary action enables terminals to quickly identify suitable frequencies for reselection without extensive searching, reducing cell reselection time and improving overall network efficiency.
3Productivity
If base stations broadcast detailed cell reselection priority information, then terminals can perform efficient cell reselection, but system information complexity increases
Solution Approach 1:
The patent applies local quality by providing cell reselection priority information specifically for inter-frequency and inter-RAT scenarios where it is most needed. The base station broadcasts priority configurations for specific frequency bands and radio access technologies rather than all possible frequencies, reducing system information complexity while maintaining cell reselection efficiency for critical cases.
Data Source
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AI summary
The present disclosure relates to a communication method and system for converging a 5th-Generation (5G) communication system for supporting higher data rates beyond a 4th-Generation (4G) system with a technology for Internet of Things (IoT). The present disclosure may be applied to intelligent services based on the 5G communication technology and the IoT-related technology, such as smart home, smart building, smart city, smart car, connected car, health care, digital education, smart retail, security and safety services. A method performed by a terminal is provided. The method includes receiving, from a base station, a message for releasing a radio resource control (RRC) connection, the message including information indicating to apply alternative cell reselection priority information for a cell reselection, receiving, from a cell of the base station, system information associated with the cell reselection, in case that the system information includes cell reselection priority information and the alternative cell reselection priority information, performing the cell reselection for evolved-universal terrestrial radio access (E-UTRA) frequency and inter-radio access technology (RAT) frequency by applying the alternative cell reselection priority information to the E-UTRA frequency, and in case that inter-RAT cell is selected, deleting the information indicating to apply the alternative cell reselection priority information.