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Mediation Policy

InterStream uses the term mediation to describe premium service offerings that allow Internet Service Providers to maximize their billable capacity. Thus, this term is used because traditional telecommunications systems referred to this process as "mediation and billing."

Mediation Policies are set by broadband providers to conform with their Terms of Service (ToS) and Acceptable Use Policies (AUP). Generally, existing broadband service provider ToS/AUP agreements do not clearly or objectively specify the bandwidth capacity offered and usage requirements for service. InterStream will provide templates for these ToS/AUP agreements that correspond to specific mediation policies. These may be implemented via the mediation system. The table, below, will help clarify potential policy implementations:

ToS / AUP Agreement

Mediation Policy Parameter
(see Kurtz Diagram)

Required / Optional under Proposed MBA?

Broadband users will receive burstable to κ Mbps but not under τ Mbps sustained bandwidth with a maximum of 100 mS latency and 6% packet loss. Optionally, a flow may be throttled if it consumes sustained bandwidth for more than σ seconds when congested (sufficient bandwidth not available). This parameter is based upon use of a proprietary specification for specifying best-effort bandwidth service levels.
Appropriate for HTTP(s) and other "bursty-use" applications.

Best-Effort Bandwidth under a maximum packet loss and latency


Broadband users will receive sustained media grid service to ν Mbps with less than 0.1% packet loss and a blocking probability of less than 0.10%.

Media Grid - High Bandwidth Sustained Transfer
(FTP, ISTP, etc.) Services


Broadband consumers will receive throttled (non-sustained) bandwidth at maximum of Ζ Kbps.

Throttled P2P /
Sustained (> σ seconds) Transfer Bandwidth

Not Yet Specified*

Broadband consumers will receive interactive service (VoIP/Video Conf.) bandwidth at ψ Mbps with less than 0.01% packet loss and less than 30 mS latency.

Interactive Service Bandwidth


Broadband consumers will receive ultra-low latency (SAN, storage) bandwidth up to β Mbps with less than 0.001% packet loss and less than 10 mS latency.

Storage and other ultra-low latency / packet loss Bandwidth


where κ, τ, ν, σ, ψ, Ζ, and β are metrics specified by the broadband service provider to individual customers based on their offered capacity

Note: All of the service models under the ToS/AUP need not be specified by the broadband service provider.
InterStream will likely only require that Mediation Policies for Best-Effort and Media Grid Bandwidth be specified under the MBA, initially.

This table proposes representative metrics for stream blocking probability, packet loss percentages and latency for potential services.
The InterStream Technical Working Group and Oversight board will set these requirements during pilot development

*Near the completion of Phase II of the Pilot Mediation Policies for Throttled P2P Bandwidth may be required.
The IOB may set these policies after reviewing pilot implementation statistics.

For a Visual Representation of this Sample Mediation Policy Click Here

Mediation Policies will be set through the Media Grid management portal. In addition, the portal will provide ISPs and network operators with the ability to receive reports and metrics for management and settlement of their peering and transit agreements.

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Page last modified on June 25, 2012, at 02:15 PM PST