Cisco Headend System Release 2.7 Installation Guide
Chapter 7 Provision DTACS
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78-4036705-01 Rev D
Provisioning a Broadcast Service Group
A Broadcast Service Group (BSG) is a group of QAM channels that service a subset
of the DTA device population. A single QAM channel can be associated with a single
BSG. All QAM channels within a BSG illuminate a single RF plant. This section
contains the procedures necessary to provision a BSG.
of the DTA device population. A single QAM channel can be associated with a single
BSG. All QAM channels within a BSG illuminate a single RF plant. This section
contains the procedures necessary to provision a BSG.
Note: BSG provisioning is also known as QAM localization.
BSG Overview
Some sites do not have a single homogeneous RF downstream plant frequency plan.
Consequently, sites with multiple frequency plans require a separate, unique set of
SI data flows for each unique RF plan.
Consequently, sites with multiple frequency plans require a separate, unique set of
SI data flows for each unique RF plan.
These RF plans are called downstream plant regions (DPR). These DPRs are referred
to as a logical construct within the DTACS called broadcast service groups (BSGs).
To support a video network with multiple DPRs, several constraints must be
addressed.
to as a logical construct within the DTACS called broadcast service groups (BSGs).
To support a video network with multiple DPRs, several constraints must be
addressed.
Billing System: The billing system associates a rate code with a specific service
package. The service package is passed to the DTACS, which uses the package to
define a set of services (channel lineups) for DTA client devices. However,
service packages and their associated channel lineup information as defined on
the billing system are not aware of any anomalies that may exist in the plant that
affect delivery of those services. Therefore, locating the DTA client devices
within the video network for the purpose of supplying it with a valid set of
services is necessary.
package. The service package is passed to the DTACS, which uses the package to
define a set of services (channel lineups) for DTA client devices. However,
service packages and their associated channel lineup information as defined on
the billing system are not aware of any anomalies that may exist in the plant that
affect delivery of those services. Therefore, locating the DTA client devices
within the video network for the purpose of supplying it with a valid set of
services is necessary.
VCT ID: A video network with several different frequency plans (DPRs) needs
to reuse the same VCT ID (authorization code) for each of these DPRs. However,
the channel maps associated with a redundant VCT ID (which is used by more
than one DPR) may have differing content.
to reuse the same VCT ID (authorization code) for each of these DPRs. However,
the channel maps associated with a redundant VCT ID (which is used by more
than one DPR) may have differing content.
QAMs: For DTA client devices to located services on QAMs, all QAM carriers
within a DPR must be associated with a single BSG. This means that no QAM RF
channels are shared between two different BSGs. ("BSG straddle" is when a QAM
carrier illuminates two BSGs. This is strictly forbidden.) All QAMs involved in
delivering content to DTA client devices are assumed to be localized at the edge
of the network.
within a DPR must be associated with a single BSG. This means that no QAM RF
channels are shared between two different BSGs. ("BSG straddle" is when a QAM
carrier illuminates two BSGs. This is strictly forbidden.) All QAMs involved in
delivering content to DTA client devices are assumed to be localized at the edge
of the network.
Note: The channel map of a BSG is determined by the channel map of the DNCS
Hub ID that is associated with the BSG.
Hub ID that is associated with the BSG.