GSE: A flexible, yet efficient, encapsulation for IP over DVB‐S2 continuous generic streams

Abstract

SUMMARYThe second-generation specification for Digital Video Broadcast over Satellite, DVB-S2, defines an improved and adaptive physical layer. A new framing structure at the link layer, known as the generic stream (GS), is introduced offering an alternative to the well-known MPEG transport stream (TS). This paper presents the requirements for and the design of an encapsulation protocol to transport IPv4 and IPv6 datagrams and other network protocol packets directly over DVB-S2 using this GS profile. The resulting generic stream encapsulation (GSE) is a novel method that provides flexible encapsulation with support for fragmentation. A flexible extension header format allows GSE to carry additional header information, suitable for enhanced features, such as link layer encryption and IP header compression. The paper assesses GSE performance by simulation using realistic traffic profiles and attenuation fading. This demonstrates considerable improvement in efficiency compared with the MPE/MPEG-2 TS, especially when used with adaptive coding and modulation (ACM). Although designed for DVB-S2 systems, the new encapsulation is suitable for other second-generation physical layer standards.

Interconnection Architecture of Cross-Layer Protocols to Provide Internet Services in VSAT Based Satellite Communication Systems

“…GSE는 가변적인 임의의 패킷들을 다루기 위해 만 들어진 L2 표준이다 [7] . GSE는 자체적으로 이후 DVB-S2는 다시 GSE 프레임들을 generic stream으로 받아서 baseband FRAME (BB-FRAME) [4] U. Reimers and A. Morello, "DVB-S2, the …”

DVB-T2: The Second Generation of Terrestrial Digital Video Broadcasting System

“…Constant or variable length packets, where the format is known by the modulator. This format is intended to broadcast IP content without using TS-MPE (Multi-Protocol Encapsulation) [4].…”

A Framework for an IP-Based DVB Transmission Network

“…The GS may be used to carry packets of different sizes, eliminating the TS packet format. The GS is, primarily, expected to be used for network services, where IP packets and other network-layer protocols can be efficiently encapsulated using the Generic Stream Encapsulation, GSE, protocol [14,15].…”

“…GSE supports flexible fragmentation, adapting the encapsulated data to a range of possible physical-layer frame sizes. GSE offers a higher encapsulation efficiency (2%-5% better than the TS counterpart when padding is used for data packets [14]). In addition, GSE is extensible, which allows implementing additional features through its extension headers [16], for example, security, header compression, and timestamps.…”

“…(a) Assign a Well-Known Mandatory Type Field [13,14]. A mandatory Type field directly precedes the GSE PDU ( Figure 4 [22], but this has limited use for discovery.…”