Network Switching via Direct Path Indication to Avoid PDCP Re-establishment
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In current network switching methods for data duplication transmission in NR, the change of security keys during network switching causes interruptions in the PDCP entity, leading to inefficiencies in data transmission.
Innovation Solution
A network switching method that involves obtaining indication information to switch data packet receiving and sending paths directly between nodes, avoiding PDCP re-establishment by switching interfaces, thereby maintaining continuous data transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If data duplication transmission is performed based on a unique PDCP entity with security key change during network switching, then security is improved, but service interruption occurs due to PDCP re-establishment
Solution Approach 1:
The patent segments the PDCP entity into multiple independent PDCP entities (first PDCP entity and second PDCP entity), each capable of maintaining its own security key independently. This allows the system to switch between entities without requiring re-establishment, thereby maintaining data transmission efficiency while ensuring security through key changes during network switching.
2Reliability
If PDCP re-establishment is performed to change security key during network switching, then security is maintained, but service interruption is caused
Solution Approach 1:
The patent establishes a second PDCP entity with its own security key in advance before network switching occurs. When network switching is needed, the system can immediately switch to the pre-configured second PDCP entity without performing time-consuming re-establishment procedures, thus maintaining security while avoiding service interruption.
3Device complexity
If a single PDCP entity is used for data duplication transmission, then device complexity is reduced, but network switching efficiency deteriorates due to re-establishment operations
Solution Approach 1:
The patent merges multiple PDCP entities (first PDCP entity and second PDCP entity) into a unified data transmission system that can operate seamlessly together. Both entities are configured with appropriate security keys and can handle data transmission simultaneously or alternately, allowing efficient network switching without re-establishment while maintaining a relatively simple overall structure.
Data Source
AI summary
Provided are a network switching method, a network node, a chip and a communication system, the method comprising: a first node acquires indication information, the indication information being used to indicate to the first node to switch a receiving path and/or a transmitting path of a data packet of the first node; and the first node receives and/or transmits the data packet according to the indication information. In the implementations of the present disclosure, the first node directly switches the receiving path and/or the transmitting path of the data packet thereof by means of the indication information, which avoids a reconstruction operation of a PDCP entity of the first node during the switching process of the first node, thereby avoiding an interruption in the service of the PDCP entity, and improving the data transmission efficiency.