Wireless Handover Delay Control for NTN Load Distribution
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Solution Overview
Problem
Wireless communication systems face challenges in managing handover loads, particularly in Non-Terrestrial Networks (NTN), where large cell sizes and satellite movements lead to simultaneous handovers by numerous UEs, causing congestion and signaling overhead.
Innovation Solution
Implementing a delay configuration for handover operations, allowing UEs to postpone their handovers by a configured time, thereby distributing handover loads and reducing congestion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If handover is executed immediately when conditions are met, then handover speed and responsiveness are improved, but cell congestion and signaling overhead increase due to simultaneous handovers by multiple UEs
Solution Approach 1:
The patent implements periodic action by introducing a handover delay timer that distributes handover executions across different time periods. Instead of all UEs executing handover simultaneously when conditions are met, each UE waits for a configured delay period before executing handover, thereby spreading the handover load over time and reducing peak congestion at the target cell.
2Object-affected harmful factors
If handover is delayed to distribute load, then cell congestion is reduced, but handover execution time and service interruption increase
Solution Approach 1:
The patent applies dynamics by making the handover delay configurable and adjustable based on network conditions. The delay timer value can be dynamically set by the network device, allowing optimization between immediate handover (no delay) and delayed handover (with delay) based on current cell congestion levels and service requirements, thus adapting to changing conditions rather than using a fixed approach.
Data Source
AI summary
The present disclosure relates to Handover load distribution. There provides a wireless device, comprising: at least one antenna; at least one radio coupled to the at least one antenna; and a processor coupled to the at least one radio; wherein the wireless device is configured to: acquire delay configuration information about a Handover to be performed by the wireless device; and perform the Handover based on the information when a Handover execution condition is met.