Grouped Handover Parameters for NTN Service Continuity
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In non-terrestrial networks (NTN) like 5G NR, the large cell radius and satellite movement necessitate simultaneous handovers for a large number of users, leading to significant signaling overheads and challenges for service continuity due to the conventional handover method involving numerous handover commands.
Innovation Solution
A method where handover parameters are pre-configured in groups corresponding to target cells, allowing for their distribution to user equipment (UE) before handover, reducing the need for multiple handover commands and signaling overheads.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional handover method with individual handover commands is used for each user, then handover can be performed for each user, but signaling overhead increases significantly when large number of users perform handover simultaneously
Solution Approach 1:
The patent merges handover parameters for multiple target cells into a single handover parameter set that is pre-configured and sent to the UE. Instead of sending separate handover commands for each target cell, the network device consolidates parameters for multiple target cells (e.g., target cell 1, target cell 2, target cell 3) into one unified configuration, thereby reducing signaling overhead while maintaining the ability to perform handover to any of the target cells.
Solution Approach 2:
The patent applies preliminary action by pre-configuring the handover parameter set containing parameters for multiple target cells before the UE actually needs to hand over. The network device sends the complete handover parameter set in advance (e.g., via system information or RRC signaling), so that when handover is needed, the UE already has all necessary parameters ready, eliminating the need for multiple sequential handover commands and reducing signaling overhead.
2Quantity of substance
If handover parameters are pre-configured in a set for multiple target cells, then signaling overhead is reduced, but the device complexity increases due to managing multiple target cell configurations
Solution Approach 1:
The patent segments the handover parameter set into distinct groups, where each group corresponds to a specific target cell (e.g., first group for target cell 1, second group for target cell 2). Each group contains the necessary parameters for handover to that specific target cell. This segmentation allows the UE to efficiently select and use only the relevant parameter group for the intended target cell, simplifying the management complexity despite having multiple target cell configurations.
Solution Approach 2:
The handover parameter set serves multiple functions by containing parameters for multiple target cells within a single configuration. This universal structure allows the same handover parameter set to be used for handover to any of the configured target cells, eliminating the need for separate handover commands for each target cell and reducing overall system complexity.
3Measurement precision
If individual handover commands are sent to each UE, then precise handover control is achieved, but the time required for handover increases when many users handover simultaneously
Solution Approach 1:
The patent applies preliminary action by pre-configuring the handover parameter set containing parameters for multiple target cells before the UE actually needs to hand over. The network device sends the complete handover parameter set in advance (e.g., via system information or RRC signaling), so that when handover is needed, the UE already has all necessary parameters ready, eliminating the need for multiple sequential handover commands and reducing signaling overhead.
Solution Approach 2:
The patent enables dynamic selection of target cells by organizing handover parameters into groups that can be selectively activated. The UE can dynamically choose which target cell to hand over to based on current conditions, and the network can update the handover parameter set as needed, providing both precision and efficiency in handover control.
Data Source
AI summary
A method for processing handover parameters is performed by a network device. The method comprises: determining a handover parameter set, wherein the handover parameter set comprises at least one group of handover parameters, and each group of handover parameters among the at least one group of handover parameters corresponds to one target cell among at least one target cell; and sending first information for indicating the handover parameter set to a terminal.