RLC Status Reservation for Seamless Handover in Ultra-Dense Networks
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Solution Overview
Problem
In ultra-dense mobile communication networks, frequent handovers between transmission nodes lead to unnecessary resets of the Radio Link Control (RLC) layer, resulting in data loss and reduced system efficiency and user experience due to redundant retransmissions.
Innovation Solution
A method that reserves RLC status information and cached data during handovers, allowing the target node to provide a continuous data service by maintaining the RLC status to the greatest extent possible, thereby avoiding resets and reducing retransmissions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the RLC layer is reset during handover in ultra-dense networks, then the handover process follows standard procedures, but data loss occurs and system efficiency decreases due to redundant retransmissions
Solution Approach 1:
The patent applies preliminary action by establishing data forwarding tunnels and transferring RLC status information and cached data from the source eNB to the target eNB before the handover is completed. This ensures that the target eNB already has the necessary data and status information ready, eliminating the need to reset the RLC layer and avoiding data loss and redundant retransmissions.
Solution Approach 2:
The patent uses an intermediary mechanism by introducing a data forwarding tunnel between the source eNB and target eNB. This tunnel acts as an intermediary channel to transfer user data and RLC status information during handover, ensuring continuity of data transmission without resetting the RLC layer at the user equipment.
2Stability of the object's composition
If the RLC layer status is maintained during handover, then data transmission continuity is improved, but the complexity of the handover process increases
Solution Approach 1:
The patent applies segmentation by dividing the handover process into distinct phases: data forwarding tunnel establishment, RLC status information transfer, and handover execution. The RLC layer maintenance is segmented as a separate function handled through the data forwarding tunnel, while the main handover process continues independently. This modular approach manages complexity by organizing complex operations into manageable segments.
3Loss of information
If data forwarding is implemented during handover, then data loss is minimized, but the handover preparation time increases
Solution Approach 1:
The patent applies continuity of useful action by establishing the data forwarding tunnel and transferring RLC status information in parallel with other handover preparation activities, rather than sequentially. The data forwarding operates continuously during the handover process, ensuring that data transmission remains uninterrupted while minimizing the overall handover preparation time.
Data Source
AI summary
A method for processing information and a device for processing information are provided. The method for processing information is applied to a first node. The method includes: receiving, by the first node, an indication message from a network side, wherein the indication message indicates a user equipment under the first node to hand over to a second node; and negotiating, by the first node, with the second node to reserve radio link layer control protocol (RLC) status information and cached data of all bearers of the user equipment, so that the second node provides a continuing data service to the user equipment based on the reserved information.