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    Supported Attributes in Change of Authorization (CoA) Messages

    The following tables list the RADIUS attributes and 3GPP VSAs supported by the MobileNext Broadband Gateway in RADIUS Change of Authorization (CoA) messages. CoA messages contain information for dynamically changing user session authorizations. They are typically used to change associated policies, filters, or QoS attributes.

    RADIUS IETF Attributes Supported in CoA Messages

    Table 1 lists the RADIUS attributes supported by the broadband gateway in CoA messages.

    Table 1: RADIUS IETF Attributes Supported in CoA Messages

    Attribute Number

    Attribute Name

    Description

    Content

    1

    User-Name

    The username received in the Access-Request message, or a substitute username provided by the RADIUS server.

    If a value for the User-Name attribute is 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

    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

    44

    Acct-Session-ID

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

    The broadband gateway performs the CoA action on the user session indicated by this attribute.

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

    3GPP VSAs Supported in CoA Messages

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

    Table 2: 3GPP VSAs Supported in CoA Messages

    Attribute Number

    Attribute Name

    Description

    Content

    26/10415/1 (3GPP type 1)

    3GPP-IMSI

    IMSI for this user.

    UTF-8 encoded string

    26/10415/2

    3GPP-Charging-Id

    Charging ID for this PDP context/EPS bearer.

    Integer

    26/10415/5

    3GPP-GPRS-Negotiated-QoS-Profile

    QoS profile to be applied by the broadband gateway for the PDP context/EPS bearer as the CoA action.

    UTF-8 encoded string

    Published: 2011-11-23