GSSTP: a signalling transport protocol for DVB‐S2 GSE‐only transmission systems

Abstract

SUMMARYThe current signalling framework for Digital Video Broadcasting systems is based on MPEG-2 encoded Program Specific Information and System Information tables that rely on the transport stream. It is expected that in the near future, this architecture will be replaced by one based on the Generic Stream Encapsulation protocol, paving the way for the convergence of DVB-S2 broadcast transmission networks and IP infrastructure. This paper presents a new lightweight Generic Stream Signalling Transport Protocol, which can be used to realise a transmission system based only on the Generic Stream Encapsulation and that efficiently supports filtering of Program Specific Information and System Information tables.

Cryptographic transforms for a lightweight and efficient DVB link-layer security extension

“…On the other hand, security at the base-band frame layer has the advantage of low bandwidth costs and of being transparent to the link-layer protocol format. When DVB-SI and DVB-RCS Forward Link Signaling (FLS) control information is encapsulated into ULE/GSE packets [17], or when a newer signaling mechanism is adopted [22], base-band frame layer security can be simulated at the link layer by using the packet length confidentiality service and enlarging the outer packet size to that of the base-band frame, which allows to retain compatibility as well as the link-layer security solution's high flexibility and functionality at little bandwidth overhead. This scheme can now be trivially turned into a base-band frame layer security solution by omitting the static protocol base header of the outer encapsulation packet (e.g., as per signaling via the base-band frame header's SYNC byte), reducing bandwidth overhead to a minimum while permitting all security functionality to be efficiently shared between both layers.…”