Relay Node Connection Reconfiguration for Integrity Failure
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Solution Overview
Problem
In wireless communication systems, particularly in LTE-based networks, there is a challenge in effectively reconfiguring connections to a Base Station (BS) at a Relay Node (RN) due to integrity failures caused by unauthorized data modification, which affects the Hyper Frame Number (HFN) and Packet Data Convergence Protocol (PDCP) Sequence Number (SN) synchronization.
Innovation Solution
A method is introduced where an indicator for integrity failure is set, and messages are transmitted to reset specific parameters like HFN and PDCP Sequence Number to predetermined values, specifically 0, to reestablish a secure connection, using Radio Resource Control (RRC) connection reestablishment messages and PDCP reconfiguration commands.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If connection reestablishment procedure is performed at Relay Node, then connection security is improved, but parameter synchronization between Relay Node and Base Station deteriorates
Solution Approach 1:
The Base Station performs preliminary actions by sending reconfiguration messages to the Relay Node before the connection reestablishment is complete. These messages include commands to reset HFN and PDCP SN parameters, ensuring that both nodes are synchronized before data transmission resumes. This preliminary coordination prevents parameter desynchronization that would otherwise occur during the reestablishment process.
Solution Approach 2:
The system implements feedback mechanisms where the Relay Node reports the cause of integrity failure (including HFN and PDCP SN mismatch) to the Base Station. The Base Station then uses this feedback information to send targeted reconfiguration messages to the Relay Node, adjusting parameters dynamically based on the actual failure conditions detected during connection reestablishment.
2Reliability
If HFN and PDCP SN are reset to predetermined values, then integrity verification reliability is improved, but data transmission continuity deteriorates
Solution Approach 1:
The Base Station sends reconfiguration messages to the Relay Node before the connection reestablishment is complete. These messages include commands to reset HFN and PDCP SN parameters, ensuring that both nodes are synchronized before data transmission resumes. This preliminary coordination prevents parameter desynchronization that would otherwise occur during the reestablishment process.
Solution Approach 2:
The system maintains continuity of useful action by preserving the reconfiguration state after connection reestablishment. The Relay Node continues to use the updated HFN and PDCP SN values even after the reestablishment procedure completes, ensuring that integrity verification remains reliable and data transmission can resume without further interruptions. This extends the useful action beyond the immediate reestablishment event.
Data Source
AI summary
The present invention relates to a method of processing a signal in a wireless communication system. In particular, the method comprises steps of setting an indicator indicating that an integrity failure occurs and transmitting a first message associated with a connection reestablishment including the indicator to a network. The integrity failure means that data is inserted or replaced by an unauthorized third party.