Patent ID: 8477621

Claim:
A network monitoring system comprising: one or more passive monitoring probes coupled to network interfaces, the probes capable of capturing data packets from the network interfaces, the data packets associated with messages exchanged between network nodes; and a processor receiving the captured data packets from the probes, the processor operating to: identify a plurality of A11 Registration Request messages; for each A11 Registration Request message, associate an address element with an existing ePCF (evolved Packet Control Function) node, if the address element is known, or with a new ePCF node, if the address is not known; identify a plurality of A11 Registration Reply messages; for each A11 Registration Reply message, associate an address element with an existing A11 HSGW (High Rate Packet Data (HRPD) Serving Gateway) node, if the address element is known, or with a new A11 HSGW node, if the address element is not known; identify an intra-HSGW handoff in A11 Registration Request messages having a mobility event indicator and not having HSGW H1 (Control Plane Interface) address information; correlate a source path and a target path for A11 interfaces using IMSI (International Mobile Subscriber Identity) information; and bind HSGW IP (Internet Protocol) addresses of the source and target paths to a single HSGW node entity.