Base Station Data Forwarding During Handover
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Solution Overview
Problem
Current handover mechanisms in mobile networks experience latency due to discontinued data transmission between User Equipment (UE) and base stations, leading to suboptimal handover performance and an inability to meet network development requirements.
Innovation Solution
The original base station maintains and forwards data transmission to the target base station during the handover process, ensuring continuous data transmission and reducing latency by transmitting uplink and downlink data packets with Hyper Frame Number (HFN) information to synchronize data packets between stations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the UE hands over from the original base station to the target base station using conventional handover mechanism, then the handover process is completed, but data transmission is discontinued causing latency and reduced handover performance
Solution Approach 1:
The original base station performs preliminary actions by forwarding data packets to the target base station before the handover is completed. The original base station sends forward data packets (including uplink and downlink data with HFN information) to the target base station in advance, so that when handover occurs, the data transmission can continue without interruption, thus reducing latency and improving handover performance
Solution Approach 2:
The patent maintains continuous data transmission during handover by having the original base station forward data packets to the target base station while the UE is still connected. This ensures that data transmission does not stop during the handover process, eliminating the discontinuation period and maintaining continuous useful action throughout the handover
2Reliability
If the original base station maintains data transmission during handover and forwards data to target base station, then data continuity is improved, but network complexity increases
Solution Approach 1:
The original base station acts as an intermediary during handover, maintaining its data transmission role while also forwarding data to the target base station. This intermediary approach allows seamless transition without requiring complex coordination between UE and base stations, as the original base station continues to handle data packets and simultaneously prepares forwarded packets for the target base station
Data Source
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AI summary
A data transmission method, a user equipment (UE), a base station and a system are provided. The method includes maintaining transmission of data of a UE by an original base station in a handover process in which the UE hands over from the original base station to a target base station; and transmitting the data to the target base station by the original base station when maintaining the transmission of the data of the UE.