X1 Lawful Interception Bulk Transfer to Prevent Timeout Congestion
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Solution Overview
Problem
The existing ETSI standard for lawful interception in telecommunication networks does not provide a mechanism to handle the transmission of large amounts of data from a network element (NE) to an administrative function (ADMF) without causing timeout issues or channel congestion on the X1 interface.
Innovation Solution
A method is introduced where the ADMF sends a bulk indicator to the NE, specifying how to transmit large amounts of task-related information, allowing the NE to determine whether to transmit the information in one bulk or split it into several bulks, with confirmation messages indicating the status of each transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If the NE transmits all task information in a single response message, then the ADMF receives complete information, but timeout and channel congestion occur on the X1 interface
Solution Approach 1:
The patent segments the large volume of task information into multiple separate messages for transmission. Instead of sending all task details in a single response message that causes timeout and congestion, the NE transmits the information in divided portions across multiple messages, thereby preventing channel overload and timeout errors while ensuring complete information delivery to the ADMF.
2Measurement precision
If the NE processes all tasks before responding, then accurate task information is provided, but the response time exceeds the standard TIME1 requirement
Solution Approach 1:
The patent applies preliminary action by having the NE prepare and transmit task information in segmented messages without waiting to complete processing of all tasks first. The NE can begin transmitting available task information while continuing to process remaining tasks, thereby providing accurate information within the TIME1 response requirement rather than waiting for complete task processing.
3Reliability
If the ADMF implements a retry mechanism after timeout, then message delivery is attempted, but loop formation and channel congestion occur
Solution Approach 1:
The patent applies preliminary anti-action by proactively preventing timeout conditions through segmented message transmission. By dividing task information into multiple smaller messages that can be transmitted within the TIME1 requirement, the system eliminates the timeout condition that would trigger retry mechanisms, thereby preventing the harmful loops and congestion that result from repeated retry attempts.
Data Source
AI summary
A lawful interception administrative function (ADMF) transmits (201) to a network element (NE) via an XI interface, a request for information pertaining to LI tasks that are associated with the NE. The request comprises a bulk indicator that indicates a procedure of transmission, from the NE to the ADMF, of said information pertaining to LI tasks. The NE determines (203), based at least on the bulk indicator, whether or not transmission of said information pertaining to LI tasks is to be performed using the procedure of transmission indicated by the bulk indicator. If it is determined that transmission of said information pertaining to LI tasks is to be performed using the procedure of transmission indicated by the bulk indicator, the NE transmits (205), to the ADMF via the X1 interface using the procedure of transmission indicated by the bulk indicator, said information pertaining to LI tasks.