Data Forwarding in Carrier Aggregation Handover
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Solution Overview
Problem
Existing data transmission methods based on carrier aggregation between base stations face challenges in achieving accuracy and continuity during handovers, leading to data loss and reduced user experience.
Innovation Solution
A data forwarding method involving a primary base station sending messages to a secondary base station to initiate handover and confirm data forwarding to a target base station, with the secondary base station instructing user equipment to acquire data from the target base station, ensuring seamless handover and continuous data transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If carrier aggregation for cells between base stations is used to improve data throughput, then user data transmission speed is improved, but data accuracy and continuity during handover deteriorates
Solution Approach 1:
The patent applies preliminary action by having the source base station forward data to the target base station before the handover is completed. The data forwarding is initiated in advance based on handover indication information, ensuring that data is already available at the target base station when the user equipment switches, thereby preventing data loss and maintaining transmission continuity.
Solution Approach 2:
The patent implements feedback mechanisms through data forwarding confirmation information and handover completion notifications. The target base station sends confirmation information back to the source base station to verify data forwarding status, and the network controller receives handover completion notifications to track the handover process, enabling real-time monitoring and coordination to ensure data accuracy during handover.
2Ease of operation
If existing data transmission method is used during handover in carrier aggregation, then handover process is simplified, but data loss occurs reducing user experience
Solution Approach 1:
The patent introduces the network controller as an intermediary that coordinates the data forwarding process during handover. The network controller receives handover execution notifications from the source base station, determines the appropriate target base station, and manages the data forwarding confirmation process. This intermediary role ensures data continuity while maintaining relatively simple handover operations at the base station level.
3Reliability
If data forwarding confirmation mechanism is implemented, then data transmission accuracy is improved, but communication overhead increases
Solution Approach 1:
The patent applies partial action by implementing data forwarding confirmation only for specific data packets that require verification during handover, rather than for all data transmissions. The confirmation mechanism is selectively activated based on handover conditions, providing sufficient data accuracy assurance while minimizing unnecessary communication overhead for routine data transmissions.
Data Source
AI summary
Embodiments of the present invention provide a data forwarding method, device, and communications system, which relate to the field of communications and can achieve accuracy and continuity of data transmission during carrier aggregation for cells between base stations. The method includes: sending, by a primary base station, a first message to a secondary base station, where the first message is used to instruct the secondary base station to perform handover, and the first message includes an identifier of a target base station; confirming, by the primary base station, that the secondary base station forwards data to the target base station; and sending, by the primary base station, a second message to a user equipment, where the second message is used to instruct the user equipment to acquire the data from the target base station. The embodiments of the present invention are used for data forwarding.