UE Measurement Reporting for Carrier Aggregation Delay
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Solution Overview
Problem
In wireless communication systems, it takes time for user equipment (UE) in RRC_IDLE or RRC_INACTIVE states to report measurement results, which delays the addition of suitable secondary cells for carrier aggregation or dual connectivity, leading to inefficient network performance.
Innovation Solution
The UE performs additional measurements upon receiving a request for RRC connection establishment or resume, or upon receiving a paging message, and reports the results immediately upon entering the RRC_CONNECTED state, minimizing power consumption and enabling timely addition of secondary cells for carrier aggregation or dual connectivity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If the UE performs measurement in RRC_IDLE or RRC_INACTIVE state and waits to report results after connection establishment, then the UE can conserve power by not continuously measuring, but the network experiences delay in adding secondary cells for carrier aggregation or dual connectivity
Solution Approach 1:
The UE performs measurement operations in advance while in RRC_IDLE or RRC_INACTIVE state, before the RRC connection is established. The measurement results are stored and ready for immediate reporting upon connection establishment, eliminating the need to wait after connection is formed. This preliminary action resolves the contradiction by preparing measurement data beforehand, thus avoiding both continuous power consumption and post-connection delay.
2Productivity
If the UE continuously measures neighbor cells to enable timely addition of secondary cells, then the network performance is improved, but the UE power consumption increases
Solution Approach 1:
Instead of continuous measurement, the UE performs periodic measurements at specific intervals or triggers. The measurement is activated only when needed (e.g., when connection establishment is anticipated or required), and remains inactive otherwise. This periodic approach maintains network performance by ensuring measurements are available when required, while dramatically reducing power consumption by avoiding continuous operation.
Data Source
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AI summary
Provided are a method of performing measurement and a device supporting the method. According to one embodiment of the present invention, a method for performing measurement in a wireless communication system includes: receiving a request of establishment or resume of a radio resource control (RRC) connection from an upper layer; and performing the measurement on neighbor cell according to the request. Further, the method for performing measurement in a wireless communication system includes: receiving a paging message including identity of the UE from a network; and performing the measurement on neighbor cell, upon receiving the paging message.