Solution Detail
VSAT/Modem, Ground Station, TCP Proxy, SD-WAN and Application QoE
Repeatably validate end-to-end satellite paths, components and applications with reduced dependence on satellite airtime. Test VSATs, modems, stations, TCP proxies, SD-WAN, QoS, servers and real traffic.
Core Emulation Equipment
Products
4
Scenarios
11
Evidence
PCAP
Why
Satellite systems include terminals, VSATs, modems, antennas, stations, gateways, TCP proxies, SD-WAN, security, QoS and applications. Passing an isolated ideal-lab test does not establish stability across orbital conditions, high RTT, bandwidth variation, rain fade, interference, outages, handovers and concurrent workloads.
Satellite airtime is expensive, limited and hard to repeat; weather, orbit, beams, interference and load change. Following Apposite's satellite testing approach, labs should assess full-path throughput, delay, loss, response and QoS, while isolating individual VSATs, modems, proxies and gateways to locate bottlenecks.
3GPP NTN covers satellites, HAPS and UAS; LEO/MEO/GEO differ in delay, coverage and handover. Satellite services mix voice, video, web, files, telemetry, command applications, IoT, maintenance and tunnels. Use real workloads and background load beyond ping or one iperf stream.
Topology
How
Model endpoints, VSAT, modem, emulated satellite segment, ground station, gateways, proxies, security and servers. ChaosBridge supplies link conditions, Traffic Generation supplies packets and PCAPs, real endpoints provide interactions, BestPerf measures quality and Flow Hunter records sessions.
Model GEO high RTT, MEO moderate delay and LEO lower delay with more frequent handovers/path changes. Apply dynamic delay, bandwidth changes, bursts, brief outages, rain-fade/interference effects, asymmetry and recovery to check session availability.
Run voice, video, web, transfers, telemetry and IoT on real endpoints. Increase background streams, sizes, rates and bursts. Inspect throughput, delay amplification, loss recovery, TCP efficiency, response time, queues and protection of voice/telemetry.
Test components separately on controlled links: forwarding, buffers, compression and recovery; proxy acceleration at high BDP; SD-WAN routing/failover across satellite/MPLS/broadband/5G; and gateway QoS under load. Reuse profiles to compare equipment and settings.
Flow Hunter observes DNS/TLS/HTTP, media, tunnels, TCP retransmissions, recovery and QoS around stations/gateways. Export anomalies, replay through Traffic Generation and apply the satellite profile with ChaosBridge. Separate hardware supplies simultaneous generated load for regression, vendor review and pre-airtime validation.
Product Stack
Core Emulation Equipment
Optional Supporting Tools
NetAccura Traffic Generation
Generate L2-L3 test streams. Software models also replay Ethernet PCAPs, rewrite IPv4 addresses and TCP/UDP ports, and multiply traffic for performance, security detection and issue reproduction. Stop all transmit tasks before switching modes. Simultaneous generation and replay require separate devices.
BestPerf
Actively measure RTT, directional loss, jitter, micro-outages, TCP goodput and quality under load to establish link baselines.
Flow Hunter
Capture passively through mirrored ports or TAPs for L2-L7 analysis, session investigation, protocol-stage diagnosis and PCAP export.
Result
Reserve costly, limited and nonrepeatable satellite tests for final confirmation. Perform selection, application validation, QoS tuning and issue reproduction in the lab first.
Assess full-path requirements and isolate VSAT, modem, station, proxy, SD-WAN or security devices to distinguish link, device, policy and application limits.
Check availability, recovery and QoS for voice, video, web, transfers, telemetry and mission applications under delay, loss, rain-fade effects, congestion, outages and handovers.
Deliver more than throughput or delay figures: include topology, parameters, timelines, quality curves, key sessions, anomalies, PCAP extracts and retest results. Development, testing, operations, vendors and customers can discuss the same evidence rather than relying on screenshots, verbal descriptions and repeated debate.
References
3GPP NTN covers satellites, HAPS and UAS, with propagation delay, moving beams and different orbital characteristics.
Explains the relationship between end-to-end TCP throughput, RTT, bottleneck bandwidth, buffering and user experience.
RTP provides end-to-end transport for real-time audio and video. RTCP provides quality feedback, synchronization and transmission monitoring.
Next Step
NetAccura can create a test topology, parameter table and POC plan based on your links, models, application protocols, available PCAPs and SLA goals.