IAB Node Security Configuration Update via Control Messages
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Solution Overview
Problem
In mobile integrated access and backhaul (IAB) scenarios of next-generation mobile communication systems, updating security configurations without random access is inefficient, leading to potential network congestion and errors during handovers, especially when multiple UEs perform handovers simultaneously.
Innovation Solution
The method involves performing security processing based on security configuration for the PDCP layer by receiving and updating security configuration information from an IAB node, allowing for secure data transmission and reception without the need for random access, using control messages and predetermined time gaps to apply new security configurations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If random access procedure is used for security configuration update, then security update can be performed, but network congestion and handover errors occur when multiple UEs perform handovers simultaneously
Solution Approach 1:
The patent applies preliminary action by pre-configuring security parameters and using predetermined time gaps before actual handover execution. The source IAB node provides security configuration information to the UE in advance, and a predetermined time gap is established before the target IAB node applies the new security configuration, preventing conflicts during simultaneous handovers
Solution Approach 2:
The patent introduces an intermediary mechanism through the source IAB node that mediates the security configuration update process. The source IAB node generates and transmits security configuration information to the UE, which then applies it at the target IAB node, eliminating the need for random access procedures and reducing network congestion
2Productivity
If security configuration is updated without random access, then network congestion is reduced, but security processing may be compromised
Solution Approach 1:
The patent implements feedback mechanisms where the UE sends handover complete messages to confirm successful application of security configuration. The source IAB node provides security configuration information that includes necessary parameters for the UE to perform security processing, and the system monitors whether the security update was successfully applied
Solution Approach 2:
The source IAB node acts as an intermediary that ensures security configuration integrity by generating and transmitting secure configuration information to the UE, which then applies it at the target IAB node without requiring random access, thus maintaining security while improving efficiency
Data Source
AI summary
The disclosure relates to a 5G or 6G communication system for supporting higher data rates after a 4G communication system such as LTE. A data transmission/reception method of a UE in a wireless communication system supporting integrated access and backhaul (IAB) communication, includes performing security processing based on security configuration for a packet data convergence protocol (PDCP) layer when transmitting and receiving data to and from an IAB node; receiving a first control message including security configuration information from the IAB node; updating the security configuration for the PDCP layer based on the security configuration information; and performing security processing on the data transmitted and received to and from the IAB node based on the updated security configuration.