Selective Mobility Handover Execution for Latency Reduction
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Solution Overview
Problem
Current mobile networks experience significant cell handover latency, ranging from 30-60 milliseconds, which hinders the achievement of ultra-reliable low-latency communication (URLLC) requirements in Next Generation networks aiming for latency in the range of a few milliseconds.
Innovation Solution
The implementation of Dual Active Protocol Stack (DAPS) and Conditional Handover (CHO) techniques, which allow simultaneous data transmission and reception during handovers, and preparing multiple candidate target cells for handover, respectively, to reduce latency and enhance handover reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If standard handover procedures are used, then network coverage and connectivity are maintained, but cell handover latency is high (30-60 milliseconds)
Solution Approach 1:
The system performs preliminary actions by establishing dual active protocol stacks and preparing conditional handover configurations before handover is actually needed. The source base station configures multiple protocol stacks and prepares target base station information in advance, so that when handover becomes necessary, the transition can occur rapidly without full setup delays.
Solution Approach 2:
The handover process is segmented into multiple independent protocol stacks that can operate simultaneously. By dividing the handover function into separate protocol layers and parallel execution paths, the system enables one stack to maintain connectivity while another establishes the new connection, thereby reducing overall handover latency.
2Reliability
If multiple handover techniques are implemented, then handover reliability is improved, but device complexity increases
Solution Approach 1:
The system implements self-service mechanisms where the user equipment automatically selects between different handover techniques based on configured conditions and current network state. The device autonomously determines whether to execute standard handover, conditional handover, or dual active protocol stack handover without requiring complex centralized control decisions, thereby managing complexity locally.
Solution Approach 2:
The handover management system is made dynamic by allowing real-time switching between different handover techniques based on network conditions, service requirements, and pre-configured parameters. The system can adaptively adjust which handover method is active, enabling flexible response to changing conditions without permanent complexity overhead.
3Loss of time
If dual active protocol stack and conditional handover are used, then handover latency is reduced, but network resource consumption increases
Solution Approach 1:
The system applies local quality by enabling dual active protocol stacks and conditional handover configurations only in specific network locations or for specific user equipment experiencing handover challenges. Rather than deploying these resource-intensive mechanisms network-wide, the system selectively activates them where needed based on local conditions such as mobility patterns, signal quality, and service requirements.
Data Source
AI summary
A device connected to a wireless network receives, from a mobile user equipment device (UE) associated with a user, a wireless network service request. The device obtains the user's subscribed mobility handover techniques, where the user's subscribed mobility handover techniques include one or more mobility handover techniques selected by the user from multiple different mobility handover techniques associated with at least one wireless network service plan. The device executes the one or more different mobility handover techniques selected by the user for maintaining wireless communication with the mobile UE as the mobile UE moves within the wireless network.