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    Supported Attributes in Accounting Interim Update Messages

    The following tables indicate how the MobileNext Broadband Gateway processes RADIUS attributes and 3GPP VSAs in RADIUS accounting Interim-Update messages. An accounting Interim-Update message is sent by the broadband gateway when it receives an Update PDP Context Request message from the SGSN. It is used to update information related to the PDP context.

    RADIUS IETF Attributes Supported in Interim-Update Messages

    Table 1 lists the RADIUS attributes supported by the broadband gateway in Interim-Update messages.

    Table 1: RADIUS IETF Attributes Supported in Accounting Interim-Update Messages

    Attribute Number

    Attribute Name

    Description

    Content

    1

    User-Name

    The username provided to the broadband gateway by the user in the Protocol Configuration Options (PCO) received during the IP-CAN session establishment procedure.

    If the PPP PDP type is used, it is provided to the broadband gateway by the user during the PPP authentication phase.

    If no username is available, then the option specified for the user-name parameter in the anonymous-user statement of the APN configuration is used instead.

    If a value for the User-Name attribute was received in the Access-Accept message, it takes precedence over any other value for the username.

    String

    4

    NAS-IP-Address

    IPv4 address of the broadband gateway for communication with the RADIUS server.

    IPv4 address

    6

    Service-Type

    Type of service the user has requested or the type of service to be provided.

    Value indicating the service type, as specified in RFC 2865

    7

    Framed-Protocol

    Type of protocol for the user.

    Value indicating the protocol, as specified in RFC 2865

    25

    Class

    Unmodified identifier received in the Access-Accept message.

    String

    30

    Called-Station-Id

    Identifier for the target network (APN).

    APN (UTF-8 encoded characters)

    31

    Calling-Station-ID

    Identifier for the mobile station (MS), configurable on a per-APN basis.

    MSISDN in international format, UTF-8 encoded decimal characters

    32

    NAS-Identifier

    Identifier of the NAS originating the request.

    String

    40

    Acct-Status-Type

    Type of accounting message.

    Integer

    41

    Acct-Delay-Time

    Number of seconds the broadband gateway has been trying to send this accounting record.

    32-bit unsigned integer

    42

    Acct-Input-Octets

    Number of octets sent by the user for the IP-CAN bearer

    32-bit unsigned integer

    43

    Acct-Output-Octets

    Number of octets received by the user for the IP-CAN bearer

    32-bit unsigned integer

    44

    Acct-Session-ID

    User Session identifier, unique for every bearer under the session.

    Broadband gateway Gn IP address (IPv4 or IPv6) and Charging-ID, concatenated in a UTF-8-encoded hexadecimal value

    45

    Acct-Authentic

    Method by which the user was authenticated: whether by RADIUS, the NAS itself, or another remote authentication protocol.

    Integer:

    1 - RADIUS

    2 - Local

    3 - Remote

    46

    Acct-Session-Time

    Duration of the session, in seconds.

    Integer

    47

    Acct-Input-Packets

    Number of packets sent by the user.

    Integer

    48

    Acct-Output-Packets

    Number of packets received by the user.

    Integer

    52

    Acct-Input-Gigawords

    How many times the Acct-Input-Octets counter has wrapped around 2^32 over the course of this PDP session.

    32-bit unsigned integer

    53

    Acct-Output-Gigawords

    How many times the Acct-Output-Octets counter has wrapped around 2^32 over the course of this PDP session.

    32-bit unsigned integer

    55

    Event-Timestamp

    Time that this event occurred on the NAS, in seconds, since January 1, 1970 00:00 UTC.

    32-bit unsigned integer

    123

    Delegated-IPv6-Prefix

    IPv6 prefix to be used.

    Value indicating the prefix, as specified in RFC 4818

    3GPP VSAs Supported in Interim-Update Messages

    Table 2 lists the 3GPP vendor-specific attributes (VSAs) supported by the broadband gateway in Interim-Update messages.

    Table 2: 3GPP VSAs Supported in Accounting Interim-Update Messages

    Attribute Number

    Attribute Name

    Description

    Content

    26/10415/1 (3GPP type 1)

    3GPP-IMSI

    IMSI for this user.

    String

    26/10415/2

    3GPP-Charging-Id

    Charging ID for this PDP context/EPS bearer.

    String

    26/10415/3

    3GPP-PDP Type

    For a GGSN, this indicates the type of PDP context; for example, IP or PPP.

    For a P-GW, this indicates the PDN type: IPv4, IPv6, or IPv4v6.

    String

    26/10415/4

    3GPP-CG-Address

    Charging gateway IP address.

    IPv4 address, or 0.0.0.0 if no charging gateway is configured on the broadband gateway

    26/10415/5

    3GPP-GPRS-Negotiated-QoS-Profile

    QoS profile applied by the broadband gateway for the PDP context/EPS bearer.

    UTF-8 encoded string

    26/10415/6

    3GPP-SGSN-Address

    For a GGSN, this represents the SGSN IPv4 address that is used by the GTP control plane for the handling of control messages.

    For a P-GW, this represents the IPv4 address of the S-GW, trusted non-3GPP IP access or ePDG that is used on S5/S8, S2a or S2b for the handling of control messages.

    This attribute may be used to identify the PLMN to which the user is attached.

    IPv4 address

    26/10415/7

    3GPP-GGSN-Address

    For a GGSN, this represents the GGSN IPv4 address that is used by the GTP control plane for the context establishment.

    For a P-GW, this represents the P-GW IPv4 address that is used on the S5/S8, S2a, S2b or S2c control plane for the IP-CAN session establishment.

    The address is the same as the GGSN/P-GW IPv4 address used in the CDRs generated by the broadband gateway.

    IPv4 address

    26/10415/8

    3GPP-IMSI-MCC-MNC

    The MCC and MNC extracted from the user’s IMSI (first 5 or 6 digits, as applicable from the presented IMSI).

    String

    26/10415/9

    3GPP-GGSN-MCC-MNC

    The MCC and MNC of the network to which the broadband gateway belongs.

    String

    26/10415/10

    3GPP-NSAPI

    Identifier for a particular PDP context for the associated PDN and MSISDN/IMSI, from creation to deletion.

    For a P-GW, this identifies the EPS bearer ID if it is known to the P-GW.

    String

    26/10415/12

    3GPP-Selection-Mode

    Selection mode for this PDP context/EPS bearer, received in the Create PDP Context/Session Request message.

    String

    26/10415/13

    3GPP-Charging-Characteristics

    For a GGSN, this contains the charging characteristics for this PDP context, received in the Create PDP Context Request message (only available in R99 and later releases).

    For a P-GW, this contains the charging characteristics for the IP-CAN bearer.

    String

    26/10415/18

    3GPP-SGSN-MCC-MNC

    The MCC and MNC extracted from the RAI from the Create PDP Context Request and Update PDP Context Request messages.

    String

    26/10415/21

    3GPP-RAT-Type

    The Radio Access Technology type that is currently serving the user equipment.

    Integer

    26/10415/22

    3GPP-User-Location-Info

    Information about where the user equipment is currently located (for example, SAI or CGI).

    Octet string

    26/10415/23

    3GPP-MS-TimeZone

    The offset between UTC and local time in steps of 15 minutes of where the MS currently resides.

    Octet string

    Published: 2011-11-23