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Streaming mode (default)
Streaming mode is most appropriate for data systems that are more sensitive to latency and/or jitter than to
occasional packet loss; for example: streaming audio or video.
Characteristics
Required parameter values (TX device)
Related commands
Streaming mode connection sequence
Events and processes in this mode are common to all of the other RF modes.
When streaming data, the firmware only observes the RB and RO parameters on the first packet.
After transmission begins, the transmission event continues without interruption until the DIN buffer is empty or the
device reaches the streaming limit (TT parameter). As with the first packet, the payload of each subsequent packet
includes up to the maximum packet size (PK parameter).
The TX (transmitting) device specifies the TT parameter as the maximum number of bytes the TX device can send in
one transmission event. After the device reaches the TT parameter threshold, the TX device forces a random delay of
1 to RN delay slots; exactly 1 delay slot if RN = 0.
The TX device sends subsequent packets without an RF initializer since RX (receiving) devices remain synchronized
with the TX device for the duration of the transmission (from preceding packet information). However, due to
interference, some RX devices may lose data (and synchronization to the TX device), particularly during long
transmission events.
Once the TX device has sent all pending data or has reached the TT limit, the transmission event ends. The TX device
does not transmit again for exactly RN delay slots if the local (for example the TX device's) RN parameter is set to a
nonzero value. The RX device(s) do not transmit for a random number of delay slots between 0 and (RN-1) if the local
(for example the RX device's) RN parameter is set to a non-zero value. These delays lessen congestion following long
bursts of packets from a single TX device, during which several RX devices may have become ready to transmit.
Multi-transmit mode
Use Multi-transmit mode for applications that require reliable delivery without using retries and acknowledgments.
Characteristics
Required parameter values (TX
device)
Related commands
XTend RF Module User Guide
Highest data throughput
Lowest latency and jitter
Reduced immunity to interference
Transmissions never acknowledged (ACK) by receiving device(s)
RR = 0
Networking (DT, MK, MY), Serial interfacing (PK, RB, RO, TT)
Reliable delivery through forcing the transmission of every RF packet.
Every RF packet is sent exactly MT + 1 times, with no delays between
packets.
Diminished throughput and increased latency.
MT ≥ 1.
Networking (DT, MK, MY, RN, TT), Serial interfacing (BR, PK, RB, RO), RF
interfacing (FS).
Streaming mode (default)
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