Wirnet iBTS
Document title : Installation and
Maintenance Manual
Version : 2.0
Author : SNI
Date : 04/12/2018
Classification
This document is the strict property of Kerlink and shall not be either copied nor sent without express
written authorization of Kerlink
Internal Use
Kerlink m2m technologies reserved rights
Confidential
Kerlink – 1 rue Jacqueline Auriol – 35235 THORIGNÉ-FOUILLARD
Page 137 / 221
Strict confidential
Channelization
200KHz
Max EIRP (920.6-923.4MHz)**
500mW (27dBm)
Max conducted power (920.6-923.4MHz)**
250mW (24dBm)
Max EIRP (923.6-928MHz)*
40mW (16dBm)
Max conducted power (923.6-928.0MHz)*
20mW (13dBm)
Carrier sense (LBT) 920.6-922.2MHz**
5ms / -80dBm
Carrier sense (LBT) 922.4-923.4MHz**
128uS / -80dBm
Carrier sense (LBT) 923.6-928.0MHz*
128uS / -80dBm
Transmit duration (920.6-922.2MHz)**
< 4s
Transmit duration (922.4-923.4MHz)**
<400ms
Transmit duration (923.6-928.0MHz)*
<400ms
Pause duration (920.4-922.2MHz)
> 50 ms
Pause duration (922.4-923.4MHz)
> 10*Tx duration
Pause duration (923.6-928.0MHz)
> 10*Tx duration
*: ARIB STD-T108 Convenience Radio Station
**: ARIB STD-T108 Specified low power radio station
The frequency plan and channel allocation is defined for Japan in the LoRaWAN specification
and the regional parameters as defined in [1] and [2], according to “AS 923MHz” plan.
The full frequency plan proposed by Kerlink is the following:
Figure 83 : Channels allocation proposal in Japan
Note:
In the above figure:
Upstream and downstream channels are in orange: 38 channels, 200KHz spacing,
125KHz BW
Upstream channels in medium orange:
