Bluetooth,zigbee,6lowpan_iot_robot

Bluetooth was initially standardized to 802.15.1, and later Bluetooth came out with several versions, not standardized to 802 series
ZigBee with 6lowpan is a technology developed in the 802.15.4 Layer
ZigBee transmission is also 100 meters, it is difficult to do 1-kilometer

Sigfox This network should be used by the 802.15.4 of the MAC layer technology + plus others mature physical layer technology, but SIGFOX has its own signal amplification technology, can do the low-power long-distance, he set up a service-level network, like Mobile to do the service provider's PROFIT model!!!

Lora is not using 802.15.4, has its own MAC protocol and Physical layer protocol! 2015.3.5