Group UE Handover for Wireless Network Energy Saving
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current wireless communication systems face challenges in efficiently managing handovers of user equipment (UEs) when a base station turns off a cell, leading to unnecessary signal transmission and latency, particularly in scenarios where simultaneous handover commands are required for multiple UEs.
Innovation Solution
The method involves UEs receiving configuration information and validity conditions for a target cell from the base station in advance, allowing them to perform seamless handovers upon receiving a signal indicating the impending cell turn-off, thereby reducing network congestion and latency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If the base station turns off a cell to save network energy consumption, then energy efficiency is improved, but handover latency and network congestion increase
Solution Approach 1:
The base station performs preliminary actions by notifying UEs of the upcoming cell turn-off in advance through system information blocks or dedicated signaling. This allows UEs to prepare for handover before the cell is actually turned off, reducing handover latency by eliminating the need for reactive handover procedures after cell shutdown.
Solution Approach 2:
The handover process is segmented into distinct phases: notification phase (base station informs UEs of upcoming turn-off), preparation phase (UEs evaluate target cells and prepare handover parameters), and execution phase (actual handover occurs). This segmentation allows energy-saving operations to proceed systematically while managing handover latency through controlled timing.
2Device complexity
If simultaneous handover commands are issued to multiple UEs, then handover execution is simplified, but network congestion and signal transmission overhead increase
Solution Approach 1:
The base station provides preliminary handover configuration information to multiple UEs simultaneously before the actual handover executes. This includes target cell identifiers, handover parameters, and timing information. By preparing UEs in advance with all necessary handover data, the actual handover execution requires minimal additional signaling, reducing transmission overhead while maintaining simplified management.
Solution Approach 2:
The base station uses template-based handover configuration messages that can be replicated and distributed to multiple UEs. Instead of crafting individualized handover commands for each UE, the system employs standardized handover information structures that can be efficiently copied and transmitted to groups of UEs, reducing signaling overhead while maintaining individualized handover execution.
Data Source
AI summary
The disclosure relates to a 5G or 6G communication system for supporting a higher data transmission rate. A method performed by a user (UE) in a wireless communication system according to an embodiment of the disclosure may include receiving a radio resource control (RRC) message including information related to a target cell for a handover, valid condition information of the target cell, and information indicating a handover type from a base station, receiving information related to turnoff of a serving cell from the base station, and performing the handover, based on configuration information regarding the target cell and valid condition information of the target cell.