The following information needs to be transferred from the PDN-GW, ePDG or the HSS to the DF2 in order to allow a DF2 to perform its functionality:
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target identity;
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events and associated parameters as defined in clause 12.5.1.2 and 12.5.3 may be provided;
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the target location (if available) or the IAs in case of location dependent interception; (FFS)
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date/time of Location (if target location provided);
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correlation number;
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Quality of Service (QoS) information, if available;
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encryption parameters (keys and associated parameters for decrypting CC), if available and necessary.
The PDN-GW detect packets containing packet header information in the communications path but the information needed for Packet Data Header Information reporting may need to be transferred from the PDN-GW either directly to the DF2 or via another network entity in order to allow the DF2 to perform its functionality.
The IRI should be sent to DF2 using a reliable transport mechanism.
There are several different events in which the information is sent to the DF2 if this is required. The events for interception are configurable (if they are sent to DF2) in the PDN-GW, ePDG or the HSS and can be suppressed in the DF2.
The following events are applicable to the PDN-GW:
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PMIP attach/tunnel activation;
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PMIP detach/tunnel deactivation;
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PMIP session modification;
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Start of interception with active PMIP tunnel;
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DSMIP registration/tunnel activation;
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DSMIP deregistration/tunnel deactivation;
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DSMIP session modification;
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Start of interception with active DSMIP tunnel;
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DSMIP HA Switch;
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PMIP Resource Allocation Deactivation ;
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Packet Data Header Information
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Bearer activation;
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Bearer deactivation;
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Bearer modification;
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Start of interception with active bearer.
The following events are applicable to the ePDG:
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Bearer activation;
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Bearer deactivation;
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Bearer modification:
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Start of interception with active bearer.
The following events are applicable to the HSS, which is national option:
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Serving Evolved Packet System;
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Subscriber record change;
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Registration termination;
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Location information request.
A set of elements as shown below can be associated with the events. The events trigger the transmission of the information from the nodes to DF2. Available IEs from this set of elements as shown below can be extended in the nodes, if this is necessary as a national option. DF2 can extend available information if this is necessary as a national option. When the GTP protocol is used over the s2b interface, elements from table 12.2.1.2 are included in the applicable events.
Observed MN NAI
The Network Access Identifier of the Mobile Node (target identity).
Observed IMSI
The IMSI of the target.
New observed MN NAI
The Network Access Identifier of the Mobile Node (target identity).
New observed IMSI
The IMSI of the target
Old observed IMSI of the target (if available)
Old observed MN NAI of the target (if available)
Any other IMPU or IMPI (if available) available in the diameter message associated to the target
Event type
Indicates which type of event is delivered: PMIP attach/tunnel activation, PMIP detach/tunnel deactivation, Start of interception with active PMIP tunnel, DSMIP registration/tunnel activation, DSMIP deregistration/tunnel deactivation, Start of interception with active DSMIP tunnel, DSMIP HA Switch, PMIP resource Allocation Deactivation, Serving Evolved Packet System, Subscriber record change, Registration termination, Location information request, Packet Data Header Information.
Event time
Time of the event generation in the ICE. Time stamp shall be generated relative to ICE internal clock.
Event date
Date of the event generation in the ICE.
Change Type
This indicates what has been changed (MSISDN, IMSI, or IMEI) in the Subscriber Change Record
Correlation number
The correlation number is used to correlate CC and IRI.
Network Element Identifier
Unique identifier for the ICE reporting the event.
Logical Function Information
Used to distinguish between multiple logical functions operating in a single physical network element.
Lifetime
Indicates the lifetime of the tunnel; shall be set to a nonzero value in the case of registration or lifetime extension; is set to zero in case of deregistration.
Failed attach reason
Reason for the failed attach/tunnel deactivation of the target.
Session modification failure reason
Reason for a failure of a session modification attempt for the target
Access technology type
Indicates the Radio Access Type.
Handover indicator
Provides information on whether the triggered as part of a handover.
APN
The Access Point Name used for the connection.
UE address info
Includes one or more IP addresses allocated to the UE.
Additional Parameters
Additional information provided by the UE, such as protocol configuration options.
Home Agent address
Contains the IP address of the Home Agent.
Care of Address
The Local IP address assigned to the UE by the Access Network, used as Care of Address for DSMIPv6 over S2c reference point.
HSS/AAA address
The address of the HSS/AAA triggering the PDN-GW reallocation.
Target PDN-GW address
The address of the PDN-GW which the UE will be reallocated to.
Revocation trigger
Contains the cause for the revocation procedure.
Foreign domain address
The relevant IP address in the foreign domain.
Visited network identifier
An identifier that allows the home network to identify the visited network
TS 29.273.
Requested IPv6 Home Prefix
The IPv6 Home Prefix requested by the UE.
IPv6 home prefix
The IPv6 home prefix assigned by the PDN GW to the UE.
Home address
Contains the UE Home IP address.
Destination IP Address
The IP address, including type IPv4 or IPv6, of the destination of the IP packet.
Destination Port Number
The port number of the destination of the IP packet.
Flow Label (IPv6 only)
The field in the IPv6 header that is used by a source to label packets of a flow (see RFC 3697 [41]).
Packet Count
The number of packets detected and reported (for a particular summary period).
Packet Data Summary Reason
The reason for a Packet Data Summary message being sent to the LEMF (e.g., timed out, counter expiration, end of session)
Packet Size
The size of the packet. (i.e., Total Length Field in IPv4 or Payload Length field in IPv6)
Source IP Address
The IP address, including type IPv4 or IPv6, of the source of the IP packet.
Source Port Number
The port number of the source of the IP packet.
Sum of Packet Sizes (for a particular summary period)
The sum of values contained in the Total Length fields of the IPv4 packets or the sum of the values contained in the Payload Length fields of the IPv6 packets.
Summary Period
Includes the dates and times of the first and last packets in a particular packet data interval.
Transport Protocol (e.g., TCP)
The identification of the transport protocol of the packet or packet flow being reported.
Any User-Data (AVP Name):
any change in the profit and identities of the target (if available in the Diameter message)
Any Associated-Identities (AVP Name):
any change of any associated identities of the target
Request direction:
Information if the serving node is requesting to the HSS, or requested by the
HSS.
Other update:
carrier specific of target's data that are in the intercepted diameter messages
Other Public User Identities
Other IMPU or IMPI that was allocated to Target and will be deregistered (if available)
Requesting node identifier
(I CSCF; AS) that are interfaced directly in the HSS and transmitting a diameter message from a network
Requesting network node identifier
such as IP-SM-GW Id, GMSC Id, SGSN Id, MME Id GMLC Id (country identifier is included in such request) that are in the different diameter messages related to location request for information (to route the right SMS or Call attempt, or GMLC based location request, to the right node on which is attached the target.)
Requesting node type
(IP-SM-GW AS, GMSC, SGSN, MME, GMLC) (if available)