This field contain the Network Identifier part of the Access Point Name (APN). This APN is sent to the S-GW by the MME and is relayed to the P-GW in the Create PDP Context Request message. The APN string consists of alphabetic characters ("A..Z", "a..z"), digits ("0..9") and the dash "-".

Format

IA5string

Length

1-63 bytes

An index indicating how the APN was selected.

The following APN selection mode indexes are possible:

0: MS or network provided APN, subscribed verified

1: MS provided APN, subscription not verified

2: Network provided APN, subscription not verified

Format

Enumerated

Length

1 byte

This field contains a reason for the closure of the CDR.

Supported values:

Format

Integer

Length

1 byte

Lists the charging characteristics applied to the PDP context by the S-GW. The S-GW accepts the charging characteristics from the MME or use its own configured values.

Format

Octet string

Length

2 bytes

This field specifies how the Charging Characteristics was selected.

Supported values:

Format

Enumerated

Length

1 byte

This field is a charging identifier, which can be used together with the P-GW address to identify all records involved in a single bearer context. The Charging ID is generated by the P-GW during bearer context activation and is transferred to the context requesting S-GW.

Format

Integer

Length

1-5 bytes

This field is included in the CDR when the bearer context is released and when the option "gtpp attribute diagnostics " is configured. Only the choice of "gsm0408Value" is used.

Format

Choice (gsm0408 only)

Choice (networkSpecificCause only for GTPP custom34 and custom35 dictionaries)

Length

3 bytes

This field contains the duration in seconds for the record. For partial records, only the interval described by the "recordOpeningTime" and the "last ChangeTime" in the "ListOfTrafficVolumes" is counted. The value is reset for each new partial CDR. This value is converted from the internal representation in milliseconds to an integer value representing only seconds. The mechanism for this conversion (ceiling and round-off) can be configured.

Format

Integer

Length

1-5 bytes

This field indicates that PDN address has been dynamically allocated for that particular IP CAN bearer (PDN connection). This field is missing if address is static. Dynamic address allocation might be relevant for charging e.g. as one resource offered and possibly owned by network operator. The presence of this field indicates that the Served PDP Address was dynamically assigned during context activation.

Format

Boolean

Length

1 byte

This list includes one or more Traffic Volume containers related to a "Change of Charging Condition". The maximum number of containers is configurable.

Format

Sequence

Length

Variable

Indicates if the IP-CAN bearer is used for IMS signaling. It is only present if the IP-CAN bearer is an IMS signaling bearer. A IP-CAN bearer for IMS signaling is determined via the "IM CN Subsystem Signaling Flag" conveyed via the "Activate PDP context request" message from the MS to the network (refer to TS 24.008).

Format

Null

Length

Zero

This field contains 1-16 Serving Node control plane IP used during this record (max of 15 Serving Node Changes). This is a list of IP addresses. If the PLMN-ID of the MME is same after Handover to new MME, one more IP address is added to the list. If the list is overflowed, with configured number of IP addresses, a CDR with "serving node Change" as cause for record closure will be generated. The serving node addresses, listed here map to the serving node types listed in the field "Serving node Types" in sequence.

Format

Octet String containing list of IPv4 or IPv6 addresses

Length

The length can vary based on whether the encoded IP address is IPv4 or IPv6.

This field contains a unique sequence number associated with the NodeId field and independent of the bearer context. For each Node ID, this number with range 1..4294967295 is allocated sequentially for each CDR. This along with a Node ID uniquely identifies a CDR. For SGW-CDRs, this field is included only when the command gtpp attribute local-record-sequence-number is configured.

Format

Octet String

Length

1-5 bytes

This field indicates if the PDN connection has a low priority, i.e. for Machine Type Communication.

Format

Important

This attribute field is currently available only in custom24 and custom35 GTPP dictionaries for SGW-CDRs when the CLI command "gtpp attribute lapi " is configured in GTPP Server Group Configuration mode.

Null

Length

0 Byte

The "Time Zone" IE that the MME may provide to the S-GW during the PDN context activation/modification procedure.

Format

Octet String

Length

2 bytes

This field contains an identifier string for the node that had generated the CDR.

The NodeID field is a printable string of the ndddSTRING format:

n: The first digit is the Sessmgr restart counter having a value between 0 and 7.

ddd: The number of the sessmgr instance generating the CDR.

STRING: This is a configured Node-ID-Suffix having any string from 1 to 16 characters, defined using the gtpp attribute node-id command.

If this node-id-suffix is not configured, the S-GW uses the GTPP context name as the Node-id-suffix (truncated to 16 characters).

This field is included only when the command gtpp attribute local-record-sequence-number is configured.

Format

IA5string

Length

5-20 bytes

This field defines the PDN connection (IP-CAN session) identifier to identify different records belonging to same PDN connection. This field includes Charging Id of first IP-CAN bearer activated within the PDN connection. Together with P-GW address this uniquely identifies the PDN connection.

Format

Integer

Length

1-5 bytes

This field indicates PDN type (i.e. IPv4, IPv6 or IPv4v6).

For custom24 Dictionary:

       Spare '1111'          PDP Type Organization Value 

NOTE: In LTE, only IETF is supported.

-- OCTET 2: PDP/PDN Type Number

        Bits 
        3    2    1 
        0    0    1        IPv4 
        0    1    0        IPv6 
        0    1    1        IPv4/IPv6 
        Bits 8-4 of octet are spare and are coded as zero. 

For custom34 and custom35 Dictionaries:

       Always 0x01 

-- OCTET 2: PDP/PDN Type Number

        IPV4 0x21 
        IPV6 0x57 
        IPV4/IPV6 0x8D 

Format

Octet string

Length

2 bytes

This field is the serving P-GW IP address for the Control Plane. If both an IPv4 and an IPv6 address of the P-GW is available, the P-GW includes the IPv4 address in the CDR. This is a choice attribute and the CDR can contain the binary format or the ASCII format in the CDR.

Format

Octet string

Length

The length can vary based on whether the encoded IP address is IPv4 or IPv6.

Holds the value of RAT Type, as provided to S-GW and P-GW, described in TS 29.274 for eGTP case.

This field is provided by the SGSN/MME and transferred to the S-GW/P-GW during the IP-CAN bearer activation/modification.

Format

Integer

Length

1 byte

A set of network operator/manufacturer specific extensions to the record.

This field is used to report a maximum of three RAN cause codes and packet counts.

Important

This field is operator-defined and is not encoded in any S-GW CDR dictionary until release v14.0.

Format

Sequence

Length

Variable Length Format

This field contains the time stamp when a PDP context is activated in SGSN or when a subsequent record is opened after a partial record.

The timestamp is determined based on the internal timer which has an accuracy of 10ms. Depending on the configured mechanism (ceiling, floor, round-off), this is translated into the timestamp which only shows the full seconds.

The format is shown below.

TimeStamp ::= OCTET STRING (SIZE(6))

The contents of this field are a compact form of the UTC Time format containing local time plus an offset to universal time. Binary coded decimal encoding is employed for the digits to reduce the storage and transmission overhead.

-- e.g. YYMMDDhhmmssShhmm

-- where

-- YY = Year 00 to 99 BCD encoded

-- MM = Month 01 to 12 BCD encoded

-- DD = Day 01 to 31 BCD encoded

-- hh = hour 00 to 23 BCD encoded

-- mm = minute 00 to 59 BCD encoded

-- ss = second 00 to 59 BCD encoded

-- S = Sign 0 = "+", "-" ASCII encoded

-- hh = hour 00 to 23 BCD encoded

-- mm = minute 00 to 59 BCD encoded

Format

BCD encoded octet string

Length

9 bytes

A running sequence number with range 1.. 4294967296 used to link partial records generated by the S-GW for a specific IP-CAN bearer context (characterized with the same Charging ID and P-GW address). This field is not present if the first record is also the final record.

Format

Integer

Length

1-5 bytes

This field identifies the type of the record.

SGW-CDR (sgwPDPRecord) 84 (0x54)

Format

Integer

Length

1 byte

This fields contains the International Mobile Equipment Identity (IMEISV) of the equipment served, if available.

The structure of the IMEI is defined in TS 23.003.

The IMEI is composed of the following elements:

If SV is not available, a filler digit "f" is added after the spare digit to fill up the last byte. Spare digit: this digit is zero, when transmitted by the MS.

Format

BCD encoded octet string

Length

8 bytes

This field contains the International Mobile Subscriber Identity (IMSI) of the served party. The IMSI is formatted in accordance with 3GPP TS 23.003.

Example for Coding: (Set by SGSN)

3GPP TS 23.003 (CCITT Rec. E 212) 
ServedIMSI ::= OCTET STRING (SIZE(1..8)) 
-- subscriber identification IMSI 
-- octet 1..8: <= 15 digits TBCD-String (twisted) 
-- substructure (without spares or fillers): 
-- 3 digits - mobile country code (MCC) 
-- 2 digits - mobile network code (MNC) 
-- <= 10 digits - mobile subscriber identification number (MSIN) 
-- first and intermediate octet = 2 digits 
-- last octet = 2 digits or 1 digit + 1 fill digit H'F 
-- 

-- example: 
-- IMSI: '262025600010020' 
-- filled: '262025600010020F' 
-- encoded: H'62 02 52 06 00 01 20 F0 

Format

BCD encoded octet string

Length

3-8 bytes

This field tracks the Mobile Station (MS) ISDN number (MSISDN) of the subscriber which is transparently copied from the Create Session Request message.

The MSISDN is TBCD encoded as shown in the example below:

3GPP TS 23.003 (CCITT Rec. E 213)

ServedMSISDN ::= OCTET STRING (SIZE(1..9))

MSISDN in CDR is 1:1 copy of the MSISDN sent in GTP-V2 message. MSISDN value contains only the actual MSISDN number (does not contain the "nature of address indicator" octet, which indicates "international number" as in 3GPP TS 29.002) and is encoded as TBCD digits (i.e. digits from 0 through 9 are encoded "0000" to "1001"). When there is an odd number of digits, bits 8 to 5 of the last octet are encoded with the filler "1111".

Example:

encoded: 00H' 94 71 02 04 30 50

Format

BCD encoded octet string

Length

1-9 bytes

This field contains the IP address for the PDN connection (PDP context, IP-CAN bearer) if available. This is a network layer address of type IP version 4 (PDN Type is IPv4) or IP version 6 (PDN Type is IPv6 or IPv4v6). The address for each bearer type is allocated either temporarily or permanently (see "Dynamic Address Flag"). This parameter is present except when both the bearer type is PPP and dynamic address assignment is used.

NOTE: IP address allocated for the PDP context / PDN connection, if available, i.e. IPv4 when PDN Type is IPv4 or IPv6 when PDN Type is IPv6 or IPv4v6.

Format

Octet string

Length

The length can vary based on whether the encoded IP address is IPv4 or IPv6.

This field contains the IPv4 address for the PDN connection (PDP context, IP-CAN bearer) when dual-stack IPv4v6 is used, and the IPv6 address is included in Served PDP Address or Served PDP PDN Address.

This field is not included if the PDP/PDN address is IPv4 or IPv6. By default, this field is not sent, even if the PDP Type is IPv4v6; this field must be enabled using the gtpp attribute served-pdp-pdn-address-extension CLI command.

Important

Note that this field is not part of the 3GPP 32.298 Release 6 and 7 specifications. This field is an Rel.9 attribute and it can be present in Rel.7 or Rel.8 dictionary if enabled through the gtpp attribute served-pdp-pdn-address-extension CLI command.

Format

Octet string

Length

8 bytes

This field denotes the PLMN identifier (MCC and MNC) of the P-GW used. This field is present in CDRs if the P-GW PLMN-ID is available in the CSR message from Serving Node (MME).

The MCC and MNC are coded as described for "Routing Area Identity" in TS 29.060.

Format

Octet string

This field contains one or several serving node types in control plane of S-GW or P-GW, which have been connected during the record. The serving node types listed here map to the serving node addresses listed in the field "Serving node Address" in sequence.

The possible values are:

ServingNodeType    ::= ENUMERATED 
{ 
                sGSN            (0), 
                pMIPSGW      (1), 
                gTPSGW        (2), 
                ePDG            (3), 
                hSGW            (4), 
                mME              (5) 
} 

NOTE: In the SGW-CDR, the possible values are SGSN(0) and MME(5).

Format

Sequence of serving Node Type

Length

Variable length format (Based on number of nodes connected during this period).

This field is the serving S-GW IP address for the Control Plane. If both an IPv4 and an IPv6 address of the S-GW is available, the S-GW includes the IPv4 address in the CDR. This is a choice attribute and the CDR can contain the binary format or the ASCII format in the CDR.

Format

Octet string

Length

The length can vary based on whether the encoded IP address is IPv4 or IPv6.

This field is present only in the SGW-CDR to indicate that this is the first record after an S-GW change. In this case, it is set to TRUE ("FF")

Format

Boolean

Length

1 byte

This field contains the time when the IP-CAN session starts at the S-GW/P-GW, available in the CDR for the first bearer in an IP-CAN session.

The timestamp is determined based on the internal timer which has an accuracy of 10ms. Depending on the configured mechanism this is translated into the timestamp which only shows the full seconds.

The format is shown below.

TimeStamp ::= OCTET STRING (SIZE(6))

The contents of this field are a compact form of the UTC Time format containing local time plus an offset to universal time. Binary coded decimal encoding is employed for the digits to reduce the storage and transmission overhead

-- e.g. YYMMDDhhmmssShhmm

-- where

-- YY = Year 00 to 99 BCD encoded

-- MM = Month 01 to 12 BCD encoded

-- DD = Day 01 to 31 BCD encoded

-- hh = hour 00 to 23 BCD encoded

-- mm = minute 00 to 59 BCD encoded

-- ss = second 00 to 59 BCD encoded

-- S = Sign 0 = "+", "-" ASCII encoded

-- hh = hour 00 to 23 BCD encoded

-- mm = minute 00 to 59 BCD encoded

Format

BCD encoded octet string

Length

9 bytes

This field contains the time when the IP-CAN session is terminated at the S-GW/P-GW, available in the CDR for the last bearer in an IP-CAN session.

The timestamp is determined based on the internal timer which has an accuracy of 10ms. Depending on the configured mechanism (ceiling, floor, round-off) this is translated into the timestamp which only shows the full seconds.

The format is shown below.

TimeStamp ::= OCTET STRING (SIZE(6))

The contents of this field are a compact form of the UTC Time format containing local time plus an offset to universal time. Binary coded decimal encoding is employed for the digits to reduce the storage and transmission overhead

-- e.g. YYMMDDhhmmssShhmm

-- where

-- YY = Year 00 to 99 BCD encoded

-- MM = Month 01 to 12 BCD encoded

-- DD = Day 01 to 31 BCD encoded

-- hh = hour 00 to 23 BCD encoded

-- mm = minute 00 to 59 BCD encoded

-- ss = second 00 to 59 BCD encoded

-- S = Sign 0 = "+", "-" ASCII encoded

-- hh = hour 00 to 23 BCD encoded

-- mm = minute 00 to 59 BCD encoded

Format

BCD encoded octet string

Length

9 bytes

This field contains the User CSG Information (UCI) status of the user accessing a CSG cell. Closed Subscriber Group identifies a group of subscribers who are permitted to access one or more CSG cells of the PLMN as a member of the CSG.

Length

Varies

This field contains the User Location Information as described in TS 29.274 for eGTP case (e.g. CGI, SAI, RAI, TAI and ECGI).

The field is provided by the SGSN/MME and transferred to the S-GW/P-GW during the IP-CAN bearer activation/modification.

User Location Information contains the location (e.g. CGI/SAI, ECGI/TAI or RAI) where the UE is located and used during the transfer of the data volume captured by the container (applicable only to the SGW-CDR). This is included in the Traffic data container only if previous container's change condition is "user location change". Note the user location information in SGW-CDR main level contains the location where the UE was when PGW-CDR was opened.

The flags ECGI, TAI, RAI, SAI and CGI in octet 1 indicate if the corresponding fields are present in the IE or not. If one of these flags is set to "0", the corresponding field is not present at all. The respective identities are defined in 3GPP TS 23.003.

The following subclauses specify the coding of the different identities. For each identity, if an Administration decides to include only two digits in the MNC, then bits 5 to 8 of octet 7 are coded as "1111".

CGI field:

The Location Area Code (LAC) consists of 2 octets. Bit 8 of Octet 9 is the most significant bit and bit 1 of Octet 10 the least significant bit. The coding of the location area code is the responsibility of each administration. Coding using full hexadecimal representation is used.

The Cell Identity (CI) consists of 2 octets. Bit 8 of Octet 11 is the most significant bit and bit 1 of Octet 12 the least significant bit. The coding of the cell identity is the responsibility of each administration. Coding using full hexadecimal representation is used.

SAI field:

The Location Area Code (LAC) consists of 2 octets. Bit 8 of Octet 9 is the most significant bit and bit 1 of Octet 10 the least significant bit. The coding of the location area code is the responsibility of each administration. Coding using full hexadecimal representation is used.

The Service Area Code (SAC) consists of 2 octets. Bit 8 of Octet 11 is the most significant bit and bit 1 of Octet 12 the least significant bit. The SAC is defined by the operator.

RAI field:

The Location Area Code (LAC) consists of 2 octets. Bit 8 of Octet 9 is the most significant bit and bit 1 of Octet 10 the least significant bit. The coding of the location area code is the responsibility of each administration. Coding using full hexadecimal representation is used.

The Routing Area Code (RAC) consists of 2 octets. Only Octet 11 contains the RAC. Octet 12 is coded as all 1's (11111111). The RAC is defined by the operator.

TAI field:

The Tracking Area Code (TAC) consists of 2 octets. Bit 8 of Octet 9 is the most significant bit and bit 1 of Octet 10 the least significant bit. The coding of the tracking area code is the responsibility of each administration. Coding using full hexadecimal representation is used.

ECGI field:

The E-UTRAN Cell Identifier (ECI) consists of 28 bits. Bit 4 of octet 10 is the most significant bit and bit 1 of Octet 11 is the least significant bit. The coding of the E-UTRAN cell identifier is the responsibility of each administration. Coding using full hexadecimal representation is used.

Format

Octet string

Length

6 -34 bytes

Note that the length varies depending on the type of identity.