Author: Ali cloud IoT Division technical experts Wintour
technology era of IoT not the same as what they encountered and challenges, briefly summarize the problems and challenges we face Ali cloud IoT scene.
A variety of connection
Interconnection of all things, the form of connection is also undergoing changes quietly, from WIFI, 3G / 4G, BLE to NB-loT, LoRa, traditional RS232, RS485, CAN BUS and so boarded a new stage, had nothing to do with each other network form, intertwined, heterogeneous network to build a unified communications. 
The face of intelligent life, intelligent industry, Smart City, Smart Park, and some scenes pursuit of low-power, low-latency pursuit of some scenes, some scenes pursuit of throughput, facing different needs, form a single network and network agreement is difficult to meet the needs of different scenarios.
For example, in protocols:
MQTT agreement
Features a lightweight, simple, elegant PUB / SUB model is ideal for message-driven scenes, short delicate features while weak network environment and resource-constrained environment is very friendly.
The CoAP
CoA