Comtech EF Data CDD-880, Installation And Operation Manual

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F–1
Appendix F. dMESH (VMS
DYNAMIC MESH) SOLUTIONS
F.1 dMesh (Dynamic Mesh) Overview
VMS v3.x.x VIPERSAT Management System User Guide (CEFD P/N MN/22156)
Mesh connectivity minimizes the requirement for communications that are routed through a
hub and re-routed back to the remote segments of an Advanced VSAT Network. The benefit of a
mesh circuit is that it reduces the time it takes to establish and maintain communications
between remote sites. This eliminates double hop scenarios, provides less latency, and improves
Quality of Service (QoS) between remote AVSAT locations; geostationary satellite single hop link
latency is thereby maintained for real-time applications such as VoIP and videoconferencing.
This is not a new concept – it has been implemented for many years in terrestrial microwave
applications.
Although there are many satellite modem manufacturers producing new generations of
products, few provide the means to address point-to-point or point-to-multipoint mesh
connectivity or offer premium commercial-grade services between AVSAT locations. Mesh
offerings are typically limited to TDM/TDMA and DAMA solutions, or “best-effort” service for
circuit-switched voice as well as limited VoIP and data throughput.
Comtech EF Data leverages the concept of Bandwidth-on-Demand (BoD) by taking advantage of
Dynamic Single Channel per Carrier (dSCPC) in a mesh environment and adapting it to Comtech
EF Data’s Advanced VSAT Network platform. This adds dynamic point-to-multipoint SCPC mesh
circuits to the network’s existing hub and remote link, and DVB-S2 outbound and VersaFEC
dSCPC to the return link. Comtech EF Data manages these elements, and provides BoD in a mesh
environment through its Vipersat Management System (VMS), the software switching engine
behind our Vipersat technology.