Walk by not possible with lora.
Walk by is used with short range wireless, transmitting very often, for example Wireless MBus mode T1 transmitting every 8 seconds. You have short range (100meters to 500meters) so you need to walk around.
LoRa is long range, you need not move, just install a base station in a high site 24h/7d and it will receive data in a big area of several kilometers.
LoRa looks like Wireless MBus mode N.