background image
Bionic Buffalo Tech Note #108: DSM-CC Data Carousel and Module Identification
Bionic Buffalo Tech Note #108
DSM-CC Data Carousel and Module Identification
last revised Tuesday 2003.09.22 
©2003 Bionic Buffalo Corporation. All Rights Reserved.
Tatanka and TOAD are trademarks of Bionic Buffalo Corporation
Introduction
The DSM-CC specification (ISO/IEC 13818-6) describes several data items which can be used to
identify data carousels and modules. This Tech Note discusses and summarizes their use.
The following discussion applies to the data carousel scenario only, and not to flow-controlled or non-
flow-controlled download scenarios. 
Available Identification Mechanisms 
The carousels and modules offered by servers may be identified in various ways. These include:
Variable
Identifies
Control
Messages?
Data
Msgs?
Remarks
serverId
server address
Download
Server
Initiate
only
no
associates a specific combination of
compatibilityDescriptor
 and
privateData
 with a server address 
transactionId
session
yes
no
versioning mechanism for
DownloadInfoIndication
 messages,
changed whenever the message content
changes 
downloadId
scenario in
progress
from server
only
yes
identifies a single instance of a scenario in
progress; unique within the network; not
for multiplexing 
compatibility
Descriptor
applicable
hardware or
software
configuration
yes
no
may be used for implementation-specific
purposes 
Page 1 of 5