Data Retransmission

The following figures illustrate the details on the retransmission cycle and highlights on the consumption values for one retransmission cycle. The following table provides details about the settings for profiling the retransmission scenario in the WLR089 device.

Table 1. Profile Retransmission Settings in the WLR089 Device
Attribute	Value
TX Data Rate	DR0 and DR5
RX1 delay	1s (considered from end of TX)
RX1 data rate	Same as TX data rate
RX2 delay	2s (considered from end of TX)
RX2 data rate	DR0
Number of retransmissions (retx)	2
TX power⁽¹⁾	1 (default)
Note: 1.The TX power from the preceding table resembles the offset value from the TX power table as per the RP2-1.0.2 LoRaWAN® Regional Parameters. Calculate the actual TX power value at the radio level for the above offset value using the following equation. Figure 1. Actual TX Power Actual TX⁢ Power⁢ = MAX⁢ EIRP⁢−2⁢ dB=16−2=14⁢ dBm

To perform this scenario, disable the RX1 and RX2 receive windows on the network server side to restrict the ack reception in the WLR089 device receive windows, and the MLS proceeds to perform the retransmission cycle.

Note: Consider the packet type as a confirmed type because the retransmission feature is only applicable to the confirmed type data transmission.

The following table provides the plot reference that signifies the scenario and MAC state at that instance inside all the data retransmission plots.

Table 2. Scenario and MAC_STATE
	Scenario	MAC_STATE
A	Transmission of uplink	TX_OCCURING
B	RX1 delay	BEFORE_RX1
C	RX1 receive window	RX1_OPEN
D	RX2 delay	BETWEEN_RX1_RX2
E	RX2 receive window open	RX2_OPEN
F	Retransmission delay	RETRANSMISSION_DELAY

The following figure illustrates the data retransmission with time delta on one retransmission cycle at DR0.

Figure 2. Data Retransmission with Time Delta on Retransmission Cycle 1 at DR0

The following figure illustrates the data retransmission with time delta on one retransmission cycle at DR5.

Figure 3. Data Retransmission with Time Delta on Retransmission Cycle 1 at DR5

The following figure illustrates the data retransmission with time delta on the retransmission delay slot at DR0.

Figure 4. Data Retransmission with Time Delta on Retransmission Delay Slot at DR0

The following figure illustrates the data retransmission with time delta on the retransmission delay slot at DR5.

Figure 5. Data Retransmission with Time Delta on Retransmission Delay Slot at DR5

The following figure illustrates the zoomed-in plot of retransmission cycle 1 with time delta on the transmission of the uplink slot at DR0.

Figure 6. Retransmission Cycle 1 Zoom in Plot with Time Delta on Transmission of Uplink Slot at DR0

The following figure illustrates the zoomed-in plot of the retransmission cycle 1 with time delta on the transmission of the uplink slot at DR5.

Figure 7. Retransmission Cycle 1 Zoom in Plot with Time Delta on Transmission of Uplink Slot At DR5

The following figure illustrates the zoomed-in plot of the retransmission cycle 1 with time delta on the RX1 delay slot at DR0.

Figure 8. Retransmission Cycle 1 Zoom in Plot with Time Delta on RX1 Delay Slot at DR0

The following figure illustrates the zoomed-in plot of the retransmission cycle 1 with time delta on the RX1 delay slot at DR5.

Figure 9. Retransmission Cycle 1 Zoom in Plot with Time Delta on RX1 Delay Slot At DR5

The following figure illustrates the zoomed-in plot of the retransmission cycle 1 with time delta on the RX1 reception window slot at DR0.

Figure 10. Retransmission Cycle 1 Zoom in Plot with Time Delta on RX1 Reception Window Slot at DR0

The following figure illustrates the zoomed-in plot of the retransmission cycle 1 with time delta on the RX1 reception window slot at DR5.

Figure 11. Retransmission Cycle 1 Zoom in Plot with Time Delta on RX1 Reception Window Slot at DR5

The following figure illustrates the zoomed-in plot of the retransmission cycle 1 with time delta on the RX2 delay slot at DR0.

Figure 12. Retransmission Cycle 1 Zoom in Plot with Time Delta on RX2 Delay Slot at DR0

The following figure illustrates the zoomed-in plot of the retransmission cycle 1 with time delta on the RX2 delay slot at DR5.

Figure 13. Retransmission Cycle 1 Zoom in Plot with Time Delta on RX2 Delay Slot at DR5

The following figure illustrates the zoomed-in plot of the retransmission cycle 1 with time delta on the RX2 reception window slot at DR0.

Figure 14. Retransmission Cycle 1 Zoom in Plot with Time Delta on RX2 Reception Window Slot at DR0

The following figure illustrates the zoomed-in plot of the retransmission cycle 1 with time delta on the RX2 reception window slot at DR5.

Figure 15. Retransmission Cycle 1 Zoom in Plot with Time Delta on RX2 Reception Window Slot at DR5

The following tables provide the consumption values in each instance of retransmission, including the retransmission delay and total power consumption for one transmission cycle.

Table 3. Transmission of Uplink Instance – MAC_STATE: TX_OCCURING
Attribute	Measured Value		Units
Attribute	DR0	DR5	Units
Total duration	1488	65.40	ms
Average current	34.77	33.54	mA
Peak current	35.14	35.45	mA
Total charge	51737.76	2193.52	mA×ms

Table 4. Retransmission Delay Instance – MAC_STATE: RETRANSMISSION_DELAY
Attribute	Measured Value		Units
Attribute	DR0	DR5	Units
Total duration	2290	2215	ms
Average current	1.415	1.415	mA
Peak current	1.806	1.826	mA
Total charge	3240.35	3134.26	mA×ms

Table 5. RX1 Delay Instance – MAC_STATE: BEFORE_RX1
Attribute	Measured Value		Units
Attribute	DR0	DR5	Units
Total duration	953.4	931.1	ms
Average current	1.411	1.419	mA
Peak current	1.789	4.317	mA
Total charge	1345.25	1321.24	mA×ms

Table 6. RX1 Receive Window Open Instance – MAC_STATE: RX1_OPEN
Attribute	Measured Value		Units
Attribute	DR0	DR5	Units
Total duration	270.1	84.41	ms
Average current	13.54	13.65	mA
Peak current	15.79	15.08	mA
Total charge	3657.16	1152.20	mA×ms

Table 7. RX2 Delay Instance – MAC_STATE: BETWEEN_RX1_RX2
Attribute	Measured Value		Units
Attribute	DR0	DR5	Units
Total duration	737.3	946.9	ms
Average current	1.417	1.417	mA
Peak current	1.739	1.739	mA
Total charge	1044.76	1341.76	mA×ms

Table 8. RX2 Receive Window Open Instance – MAC_STATE: RX2_OPEN
Attribute	Measured Value		Units
Attribute	DR0	DR5	Units
Total duration	271.6	266.4	ms
Average current	13.51	13.74	mA
Peak current	15.59	14.27	mA
Total charge	3669.32	3660.34	mA×ms

The following is the MAC state sequence for one retransmission cycle:

RETRANSMISSION_DELAY + TX_OCCURING + BEFORE_RX1 + RX1_OPEN + BETWEEN_RX1_RX2 + RX2_OPEN

Table 9. Total Consumption in One Retransmission Cycle
Attribute	Measured Value		Units
Attribute	DR0	DR5	Units
Total duration	6645	4530	ms
Average current	9.891	2.841	mA
Peak current	35.14	35.45	mA
Total charge	65725.70	12869.73	mA×ms