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Comtech VIPERSAT Single Hop on Demand (SHOD)

Single Hop On Demand (SHOD) switching technology does IP packet circuit switching at the application level. SHOD dynamic optimizes latency for low latency application (LLA) connections without the high costs of multiple carriers or one-to-one, multi-receiver links.

Single satellite hop technology provides less delay, ensures higher quality voice communications, and efficient use of the satellite space segment. Enhanced Quality of Service with one satellite hop gives near voice toll quality with minimum throughput delay. Increasing the QoS is as simple as adding strategically placed demodulator/routers, and enabling system policies within the VMS.

For normal data communications, the network operates in a star configuration where the remote terminal sends data packets to the hub via the shared inbound data transmissions. If the data is destined for another remote, the packet is retransmitted by the hub's outbound carrier to the destination remote. This method of re-broadcasting the packet creates a double hop doubling the circuit's latency. Normal data applications do not have a problem with the added latency. Low latency applications, however, cannot tolerate high latency connections, making double hop circuits unacceptable for these applications.

CVNI's VMS software detects when a double-hop communication configuration exists for a LLA application and tunes the modem router to listen to the opposite remote's inbound carrier directly thereby completing a single hop circuit.

SHOD dynamically provides a low latency satellite connection between remotes, thus ensuring that low LLA traffic is not assigned to double hop satellite circuits. At least one demodulator/router is required at each remote to support SHOD. Optionally more than one demodulator/router can be used at a remote if it is required to support simultaneous SHOD calls to more than one remote at a time.

SATCOM ANTENNAS - SATCOM UPCONVERTERS (BUCs) - SATCOM CHASSIS - SATCOM CONVERTERS - SATCOM HUBS - SATCOM IP PRODUCTS -SATCOM LNCs - LNAs - SATCOM MODEMS - SATCOM MONITOR and CONTROL SYSTEMS - SATCOM MULTIPLEXERS - SATCOM NETWORKING - SATCOM POWER AMPLIFIERS  - SATCOM SSPAs - SATCOM PROTECTION SWITCHES - SATCOM RECEIVERS - SATCOM ROUTERS - SATCOM TERMINALS - SATCOM TRANSCEIVERS - SATCOM UPS (UNINTERRUPTED POWER SYSTEMS)
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