Regional Channels & Data Rates

LoRaWAN US915 Uplink Channels

All channels in 0-63 in US915 have a bandwidth of 125 KHz, encoding of 4/5 bit encoding, and permit data rates (DR) 0-3.

Helium uses sub-band 2 as detailed in the table below. (The channel frequencies described in MHz.)

Sub-band

Channels

1

902.3

902.5

902.7

902.9

903.1

903.3

903.5

903.7

0-7

2 (Helium)

903.9

904.1

904.3

904.5

904.7

904.9

905.1

905.3

8-15

3

905.5

905.7

905.9

906.1

906.3

906.5

906.7

906.9

16-23

4

907.1

907.3

907.5

907.7

907.9

908.1

908.3

908.5

24-31

5

908.7

908.9

909.1

909.3

909.5

909.7

909.9

910.1

32-39

6

910.3

910.5

910.7

910.9

911.1

911.3

911.5

911.7

40-47

7

911.9

912.1

912.3

912.5

912.7

912.9

913.1

913.3

48-55

8

913.5

913.7

913.9

914.1

914.3

914.5

914.7

914.9

56-63

In addition, there are channels number 64-72 which have a bandwidth of 500 kHz, encoding of 4/5 bit encoding, permitting data rate 4 only.

Helium uses channel 70.

Channel

Frequency (MHz)

64

903.0

65 (Helium)

904.6

66

906.2

67

907.8

68

909.4

69

911.0

70

912.6

71

914.2

LoRaWAN US915 Uplink Data Rates

The uplink data rates correspond to specific configurations as details below. Note how the BW of DR0-3 match the channels on which it is tolerated (0-63). Similarly, DR4 is only tolerated on channels 64-72.

Max application payload is given assuming the absence of the optional FOpt MAC Control field.

Data Rate (DR)

Spreading Factor (SF)

BW (kHz)

Physical bit/s

Max Application Payload

0

10

125

980

11

1

9

125

1,760

53

2

8

125

3,125

125

3

7

125

5,470

242

4

8

500

12,500

242

LoRaWAN US915 Downlink Channels

Channel

Frequency (MHz)

0

922.3

1

923.9

2

924.5

3

925.1

4

925.7

5

926.3

6

926.9

7

927.5

LoRaWAN US915 Data Rates & Spreading Factors

Max application payload is given assuming the absence of the optional FOpt MAC Control field.

Data Rate

Spreading Factor (SF)

BW (kHz)

Physical bit/s

Max Application Payload

8

12

500

980

53

9

11

500

1,760

125

10

10

500

3,900

242

11

9

500

7,000

242

12

8

500

12,500

242

13

7

500

21,900

242