Method and system for correlating IP layer traffic and wireless layer elements in a UMTS/GSM network
View Patent ↗The present invention relates to a correlation module for correlating IP layer traffic and wireless layer network elements in a network. According to an example embodiment, the correlation module includes an RNC analyzer, a Gn snoop unit, and/or a mapping unit. The RNC analyzer is configured to collect wireless layer network element information from at least one RNC. The Gn snoop unit is configured to collect wireless layer network element information and IP layer traffic information from at least one Gn interface between a serving GPRS support node and a gateway GPRS support node. The mapping unit is configured to map the IP layer traffic and the wireless layer network elements in the network based on the collected IP layer traffic information and the collected wireless layer network element information. A method of correlating IP layer traffic and wireless layer network elements in a network is also disclosed.
1. A correlation module for correlating IP layer traffic and wireless layer network elements in a network, the correlation module comprising:
a processing device including,
a Radio Network Controller (RNC) analyzer configured to collect first wireless layer network element information from at least one RNC and create an association between user location information and the RNC based on the collected first wireless layer network element information,
an interface snoop unit configured to collect second wireless layer network element information and Internet Protocol (IP) layer traffic information from at least one interface between a serving General Packet Radio Services (GPRS) support node and a gateway GPRS support node, wherein the interface snoop unit is configured to collect the second wireless layer network element information and the IP layer traffic information by decoding and deriving context information from messages sent across the at least one interface such that the context information is passed through the interface snoop unit, and
a mapping unit configured to map the IP layer traffic and the wireless layer network elements in the network based on the collected IP layer traffic information, the passed context information, and the created association between the user location information and the RNC,
wherein the first wireless layer network information collected by the RNC analyzer and the passed context information each include a Service Area Identity or Cell Global Identification field, and the mapping unit is configured to use the Service Area Identity or Cell Global Identification field as a common field to map the IP layer traffic and the wireless layer network elements in the network.
2. The correlation module of claim 1 , wherein the first wireless layer network element information collected by the RNC analyzer includes provisioning data that identifies at least one Service Area Identity or Cell Global Identification served by each RNC.
3. The correlation module of claim 2 , wherein the RNC analyzer creates an association between the user location information and the RNC by creating a table from the provisioning data that maps each identified Service Area Identity or Cell Global Identification to its corresponding serving RNC.
4. The correlation module of claim 1 , wherein the passed context information is Packet Data Protocol (PDP) Context information from GPRS Tunneling Protocol messages sent across each interface.
5. The correlation module of claim 4 , wherein the passed context information collected by the interface snoop unit includes a Service Area Identity or a Cell Global Identification, and at least one of an International Mobile Subscriber Identity, an International Mobile Equipment Identity, an End User Address, a Tunnel Endpoint Identifier, and a Serving GPRS Support Node (SGSN) Address.
6. The correlation module of claim 1 , wherein the mapping unit maps at least one mobile station to a corresponding RNC.
7. The correlation module of claim 6 , wherein the mapping unit further maps the at least one mobile station and the corresponding RNC to at least one of a corresponding International Mobile Subscriber Identity, End User Address, Tunnel Endpoint Identifier, and Serving GPRS Support Node (SGSN) Address.
8. The correlation module of claim 1 , wherein the mapping unit continually updates the mapping of the IP layer traffic and the wireless layer network elements.
9. The correlation module of claim 8 , wherein the continually updating is based on at least one of Update Packet Data Protocol (PDP) Context or Delete PDP Context information collected from the at least one interface by the interface snoop unit.
10. A method of correlating IP layer traffic and wireless layer network elements in a network, the method comprising:
collecting, by a processing device, first wireless layer network element information from at least one Radio Network Controller (RNC);
creating, by the processing device, an association between user location information and the RNC based on the collected first wireless layer network element information;
collecting, by the processing device, second wireless layer network element information and Internet Protocol (IP) layer traffic information from at least one interface between a serving General Packet Radio Services (GPRS) support node and a gateway GPRS support node, wherein the collecting second wireless layer network element information and the IP layer traffic information includes decoding and deriving context information from messages sent across the at least one interface such that the context information is passed through the at least one interface; and
mapping, by the processing device, the IP layer traffic and the wireless layer network elements in the network based on the collected IP layer traffic information, the passed context information, and the created association between the user location information and the RNC,
wherein the first wireless layer network information and the passed context information each include a Service Area Identity or Cell Global Identification field, and the mapping uses the Service Area Identity or Cell Global Identification field as a common field to map the IP layer traffic and the wireless layer network elements in the network.
11. The method of claim 10 , further comprising:
identifying at least one Service Area Identity or Cell Global Identification served by each RNC based on provisioning data included in the collected first wireless layer network element information.
12. The method of claim 11 , the creating step including,
creating a table from the provisioning data that maps each identified Service Area Identity or Cell Global Identification to its corresponding RNC.
13. The method of claim 10 , wherein the passed context information is Packet Data Protocol (PDP) Context information.
14. The method of claim 13 , wherein the PDP Context information includes a Service Area Identity or a Cell Global Identification, and at least one of an International Mobile Subscriber Identity, an International Mobile Equipment Identity, an End User Address, a Tunnel Endpoint Identifier, and a Serving GPRS Support Node (SGSN) Address.
15. The method of claim 1 , wherein the mapping step maps at least one mobile station to a corresponding RNC.
16. The method of claim 15 , wherein the mapping step further maps the at least one mobile station and the corresponding RNC to at least one of a corresponding International Mobile Subscriber Identity, End User Address, Tunnel Endpoint Identifier, and Serving GPRS Support Node (SGSN) Address.
17. The method of claim 10 , further comprising:
continually updating the mapping of the IP layer traffic and the wireless layer network elements.
18. The method of claim 17 , wherein the continually updating step is based on at least one of Update Packet Data Protocol (PDP) Context or Delete PDP Context information collected from the at least one interface.