目前看，LoRa是一个在IOT方案领域替换GSM的初步可行方案，主要从距离和功耗两个考虑方面。
介绍如下：
http://www.lora-alliance.org/What-Is-LoRa/Technology
http://www.rfwireless-world.com/Terminology/LoRa-technology-basics.html
http://www.rfwireless-world.com/Terminology/IoT-wireless-technologies.html
芯片厂商目前也已经有了量产的芯片可供评估，成本在1-2个美金。
http://www.microchip.com/design-centers/wireless-connectivity/embedded-wireless/lora-technology
http://www.semtech.com/wireless-rf/lora.html