Definition
To assist receivers in optimizing service discovery, the Generic Stream Encapsulation (GSE) Logical Link Control information can indicate the application system type used on top of IP by conveying an appropriate value of the Application_System_ID.
Key fields
- “Application System Specification Name” – name of an Application System Specification (e.g. “ACME Internet TV 1.0”)
- “Application System Specifier” – name of the organization specifying the “Application System Specification Name” mentioned above (e.g. “ACMEcast, Inc.”)
Allocation template
| 0x0000 to 0x001F | Reserved |
| 0x0020 to 0x7FFF | Reserved for registration to standardized systems |
| 0x8000 to 0xFFFF | Reserved for general registration |
Notes:
In the standardized systems registration range, allocations shall only be made for application systems which are defined and/or adopted as such by DVB, and which are fully described in a publicly available document from a recognized standardization body.
In the general registration range, separate allocations for different versions of the same application system specification
shall only be made if and when a receiver would otherwise not be able to detect the version used from the contents of
the application system streams themselves, or from private data carried in GSE LLC descriptors bearing an application_system_id field. Application system specifiers should thus design their specifications such that receivers
can detect the version used without the use of separate Application_System_ID values.