Mobile IAB Cell Reselection Parameters for Lower Terminal Power Use
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Solution Overview
Problem
Terminals connected to mobile IAB nodes perform unnecessary cell reselection operations, which can lead to increased power consumption and inefficient network usage.
Innovation Solution
The method involves receiving a system information block (SIB) from a base station to identify if it is a mobile IAB node and performing cell reselection based on mobile IAB-specific parameters, including indicators and thresholds to prevent unnecessary reselection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If terminals perform cell reselection operation based on conventional parameters, then network coverage and connectivity are maintained, but power consumption increases and network efficiency deteriorates due to unnecessary reselection operations
Solution Approach 1:
The patent applies local quality by introducing mobile IAB-specific cell reselection parameters that are selectively applied only to mobile IAB cells. The terminal identifies mobile IAB cells using a mobile IAB indicator and applies different reselection parameters (Qoffset, TReselection) specifically to these cells, rather than using uniform conventional parameters for all cells. This localized parameter application prevents unnecessary reselection operations on mobile IAB cells while maintaining proper connectivity management.
2Productivity
If terminals apply conventional cell reselection parameters to all cells, then cell reselection operation is simplified, but network efficiency deteriorates due to unnecessary reselection on mobile IAB cells
Solution Approach 1:
The patent implements preliminary action by having the terminal identify mobile IAB cells in advance using the mobile IAB indicator before performing cell reselection operations. The terminal stores the list of mobile IAB cells and checks the indicator during cell reselection evaluation, allowing it to pre-determine which cells require special parameter application. This preliminary identification simplifies the overall operation by avoiding complex real-time decisions during reselection.
3Reliability
If terminals perform frequent cell reselection operations, then network coverage is well-maintained, but power consumption increases and terminal battery life decreases
Solution Approach 1:
The patent applies parameter changes by modifying cell reselection parameters specifically for mobile IAB cells. The network configures and provides mobile IAB-specific parameters including Qoffset (offset to cell ranking) and TReselection (reselection time threshold). These parameter changes adjust the reselection criteria to be less aggressive for mobile IAB cells, reducing the frequency of reselection operations while maintaining adequate coverage through the mobile terminal's movement characteristics.
Data Source
AI summary
The present disclosure relates to a 5G or 6G communication system for supporting higher data rates. The present disclosure relates to a method for performing cell reselection in mobile IAB. According to one embodiment of the present invention, a method by which a terminal operates in a wireless communication system may be disclosed. The method may comprise the steps of: receiving a system information block (SIB) from a base station; identifying whether the base station is a mobile integrated access and backhaul (IAB) node, on the basis of a mobile IAB indicator included in the SIB; and, when the base station for a serving cell of the terminal is a mobile IAB node, performing cell reselection on the basis of cell reselection parameters for the mobile IAB included in the SIB.