Support for the AS Bandwidth Modifier

Two new parameters have been added to the media profile configuration:

• sdp-bandwidth—Enable or disable the use of the AS modifier in the SDP if the req-bandwidth and sdp-rate-limit-headroom parameters are not set to valid values in a corresponding media profile. The default value is disabled. The valid values are:
  • enabled | disabled
• sdp-rate-limit-headroom—Specify the percentage of headroom to be added while using the AS bandwidth parameter while calculating the average-rate-limit (rate limit for the RTP flow). The default value is zero (0). The valid range is:
  • Minimum—0
  • Maximum—100

The following conditions apply to the use and application of these two new parameters:

• If the amount of required bandwidth is not specified in the media profile (req-bandwidth) for the media type in the m= line of the SDP, then the value specified in the AS modifier is used. The Oracle® Enterprise Session Border Controller only uses the AS value if you set the new sdp-bandwidth to enabled.
• If the average rate limit value for RTP flows is not specified in the media profile (average-rate-limit) for the media type in the m= line of the SDP, then the value specified in the AS modifier is used. The system only uses the AS value if you set the new sdp-bandwidth to enabled. When calculating the average rate rate limit that it will use based on the AS modifier, the Oracle® Enterprise Session Border Controller applies the percentage set in the sdp-rate-limit-headroom parameter.
• The Oracle® Enterprise Session Border Controller uses the value specified in the AS modifier (if sdp-bandwidth is enabled, and req-bandwidth is set to 0) along with the user-cac-bandwidth value set in the realm configuration; this works the same way that the req-bandwidth parameter does.
• The system uses the value specified in the AS modifier (if sdp-bandwidth is enabled, and req-bandwidth is set to 0) along with the max-bandwidth value set in the realm configuration; this works the same way that the req-bandwidth parameter does.