A Framework for an IP-Based DVB Transmission Network

Table 4

Potential methods to fulfill the GSE-only signalling requirements.

GSE-only signalling requirement	Prospective methods
IP interoperability	Encapsulation of an IP packet as GSE payload.
	Any of the ND&S methods described in Section 5.2.
	Any unidirectional transport protocol.
Separation of network and content signalling	Any methods for GSE signalling identification described in Section 5.1 enabling filtering at GS-L1/L2.
	Transport protocol with a payload type field.
Extensible syntax	XML syntax.
Similar, or higher, bandwidth efficiency to that of current TS signalling	GSE extension headers to indicate compression.
	IP/UDP header compression.
	XML compression.
	New optimised lightweight transport protocol.
Coexistence with MPEG-2 TS services	Encapsulation of TS packet over GSE.
	Encapsulation of TS packet over UDP/IP/GSE.
Signalling security	GSE security extensions.
	Transport protocol with a field to indicate payload encryption.
	XML encryption.
QoS and timing reconstruction	Timestamps in RTP extension header.
	QoS descriptors in XML.
	Signalling repetition rates.
Enable service discovery and service description metadata	Any of the ND&S methods described in Section 5.2.
	XML syntax.
Provides easy identification of signalling in GSE streams	Any methods for GSE signalling identification described in Section 5.1 enabling filtering at GS-L1/L2.