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CISCO CONFIDENTIAL

Cisco BTS 10200 Softswitch — Release Notes for Release 3.3 V04

OL-1835-04

New and Changed Information

Commercial voice communications capability requires a very high level of transport and signaling

performance, including:

• Absolute minimum packet delay/loss, session setup latency time, and post pickup delay.

• Provide accounting for QoS resources on a per-session basis.

• Both two-phase (reserve-commit) and single phase (commit) QoS activation models.

• Prevent (or minimize) abusive QoS usage.

• Reclamation of QoS resources for dead/stale sessions.

The DOCSIS 1.1 specification provides the network layer QoS mechanisms responsible for classifying,

policing, scheduling, and marking packets once the traffic flows are established by the DQoS signaling

protocols. The role of DQoS is the coordination between call signaling (NCS/MGCP), which controls

access to the voice application service, and resource management, which controls access to DOCSIS

network-layer resources. This coordination ensures that users are authenticated and authorized before

receiving access to the enhanced QoS associated with the service. It also ensures that network resources

are available end-to-end before alerting the destination MTA.

The main function of the Cisco BTS 10200 is the Gate Controller function as defined in the DQoS

specification. In this role it ensures that enhanced QoS is provided only to authorized users and the use

of resources is properly accounted for, consistent with the conventions of providers that are part of the

Public Switched Telephone Network (PSTN), in which charging occurs only after the called party picks

up. This includes prevention of utilization of reserved resources for purposes other than the session to

which they are assigned.

Features supported in this release include:

• MTA/RGW signaling (NCS)—additional parameters required for DQoS. The Cisco BTS 10200 is

enhanced to handle large number of MTA’s.

• Gate control signaling (COPS)—a new interface to the Cisco BTS 10200. It covers the messaging

and parameters required for the CMS/GC to CMTS interface supporting DQoS and CALEA related

functions.

• Admission control for up stream and downstream traffic—allows service providers to provision

the necessary parameters and/or the alternative policies as a Gate Controller, such as session class

for normal voice calls or overlapping session class for emergency calls. Session classes can further

enable pre-emption of already reserved resources, where the policy for pre-emption is provisioned

by the service provider.

• Call scenarios supported:

–

On-net to on-net call without gate coordination.

–

On-net to off-net call without gate coordination.

–

Off-net to on-net call without gate coordination.

• Residential Gateway (RGW) support.

–

DQoS capable PacketCable MTA

–

Non-DQoS capable PacketCable MTA

• Resource control—ensures that the use of resources is properly accounted for. This function is

performed by CMTS with the resource control data provided by the Cisco BTS 10200, such as

session class, maximum sessions allowed, maximum bandwidth allowed, and so on.

• Dynamic binding of resources—specifically support of the call waiting feature. CMTS is directed

by the CMS/CA to switch resource between gates. This function is initiated by the MTA with the

information provided by the BTS over the NCS interface. The provided resource ID will be used by

the MTA to perform RSVP signaling which triggers the resource binding over the DOCSIS link.

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