WCDMA Data Collection Using Mobile Identification Number
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Solution Overview
Problem
In WCDMA networks, searching for transmitted and received data in the Iu-PS link is complicated due to the frequent changing nature of Packet-Temporary Mobile Subscriber Identity (P-TMSI), requiring specialized equipment or network manager intervention.
Innovation Solution
A method that collects data using a Mobile Identification Number (MIN) in the Iu-PS link by reassembling ATM/AAL5 data, extracting SLR or DLR data from Connection Request or Connection Confirm messages, storing RANAP message data, and registering mobile IP addresses to capture and extract transmitted and received data using general-purpose equipment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If P-TMSI is used to identify mobile stations in Iu-PS link, then mobile station identification is achieved, but data collection becomes complicated requiring specialized equipment or network manager intervention
Solution Approach 1:
The patent introduces MIN as an intermediary identifier that bridges the gap between P-TMSI and IMSI. By capturing MIN from Gn interface messages (which are easier to access) and using it to correlate with P-TMSI in Iu-PS link data, the system enables data collection using general-purpose equipment without requiring direct P-TMSI monitoring or network manager intervention.
Solution Approach 2:
The patent creates a mapping copy between MIN and P-TMSI by capturing MIN from Gn interface messages and storing the correspondence in a database. This copy allows data collection systems to use MIN (which is easier to obtain with general-purpose equipment) instead of directly accessing P-TMSI, thereby simplifying the data collection process while maintaining accuracy.
2Reliability
If P-TMSI is used for mobile station identification, then accurate identification is achieved, but frequent changes in P-TMSI value complicate data collection and monitoring
Solution Approach 1:
MIN serves as a stable intermediary identifier that maintains reliable association with mobile stations across P-TMSI changes. By using MIN as the primary tracking identifier and correlating it with transient P-TMSI values through captured messages, the system achieves both reliable identification and ease of data collection even as P-TMSI frequently changes.
Solution Approach 2:
The patent performs preliminary capture of MIN from Gn interface messages and establishes mapping relationships before Iu-PS link data collection begins. This preliminary action ensures that when P-TMSI changes occur, the system already has the corresponding MIN values ready for correlation, eliminating the need for real-time P-TMSI monitoring and simplifying ongoing data collection.
Data Source
AI summary
Disclosed herein is a method of collecting data using a Mobile Identification Number (MIN) in a Wideband Code Division Multiple Access (WCDMA) network. The method includes the steps of (a) reassembling ATM/AAL5 data into SCCP and higher layer data in an Iu-PS interface link, and capturing the reassembled data; (b) extracting SLR or DLR data from Connection Request (CR) or Connection Confirm (CC) of the captured SCCP data, and storing reference Radio Access Network Application Part (RANAP) message data having the higher layer data in storage based on the extracted SLR or DLR data; (c) extracting a mobile IP address related to the MIN of the mobile station in the Gn interface link; and (d) registering SLR or DLR data having the mobile IP address, and, afterward, capturing and extracting transmitted and received data having the SLR or DLR data in the Iu-PS interface link.