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Latency can vary from tens of milli-seconds to several seconds.
ZiXi Zixi protocol can start benefit from one provide a delay of a single frame (30ms), while increasing the latency will to provide more robustness for the error-recovery.
In low latency (below 1500ms) the error recovery is based on a hybrid approach of FEC and ARQ. FEC will add overhead of up to 30% (adaptive–without congesting the network).
To allow sufficient error-recovery it is recommended to set the Latency at least 3 times larger than the RTT (i.e Latency >= 3* RTT).
Latency can be set to any value, we can propose recommend two common modes:
- Interactive mode - 500ms
- Non-interactive mode – 4000ms
Latency below 1500ms will add an FEC overhead of up to 30%.