Inter-DU Handover Pre-Configuration for Low-Latency Mobility
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Solution Overview
Problem
Existing mobility management in telecommunications networks involving distributed units (DUs) lacks efficient mechanisms for pre-configuring handover preparation information, leading to increased latency in inter-DU mobility procedures.
Innovation Solution
Implementing a system where a central unit (CU) transmits handover preparation information to a target DU before the initiation of a handover, enabling the DU to perform a random access procedure and trigger inter-DU mobility upon receiving a request, thereby reducing latency by preparing the necessary context and bearers in advance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If handover preparation information is configured in advance at the target DU, then mobility latency is reduced, but device complexity increases
Solution Approach 1:
The patent applies preliminary action by having the CU transmit handover preparation information to the target DU before the actual handover occurs. This includes pre-configuring bearer information, QoS parameters, and other mobility-related data at the target DU in advance, so that when handover is triggered, the UE can be rapidly transferred with minimal latency.
2Productivity
If handover preparation information is transmitted to target DU before handover, then handover efficiency is improved, but information transmission overhead increases
Solution Approach 1:
The patent implements partial action by selectively transmitting only the necessary handover preparation information to the target DU, rather than all possible data. The CU determines which specific parameters and bearer information are needed based on the service requirements and mobility scenario, thereby reducing unnecessary information overhead while still achieving efficient handover.
3Speed
If pre-configuration of handover information is implemented, then mobility speed is improved, but control complexity increases
Solution Approach 1:
The patent uses the CU as an intermediary that manages the complexity of pre-configuring handover information. The CU receives mobility requirements from the network, determines appropriate handover preparation data, transmits it to the target DU, and coordinates the actual handover execution. This intermediary role simplifies the overall control architecture while enabling fast mobility.
Data Source
AI summary
Embodiments of the present disclosure relate to mobility with pre-configuration of handover preparation information at distributed unit (DUs). According to embodiments of the present disclosure, a central unit (CU) of a base station comprises a transceiver configured to communicate with a network; and a processor communicatively coupled to the transceiver and configured to perform operations. The operations comprise transmitting, to a second DU of the base station, handover preparation information for inter-DU mobility of a user equipment (UE); after transmitting the handover preparation information, receiving a request for the inter-DU mobility from a first DU of the base station serving the UE; and in accordance with a determination that the request for the inter-DU mobility is accepted, triggering the inter-DU mobility.