NXP Semiconductors JN517x-DK005, Руководство пользователя

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JN517x-DK005 Development Kit
User Guide
JN-UG-3121 v1.1 © NXP Semiconductors 2017 17
1.3 Internet of Things (IoT)
The ‘Internet of Things’ (IoT) refers to the concept of electrical devices being
connected via the Internet, irrespective of their basic functionality. This allows the
devices to be remotely controlled and monitored from other devices on the Internet -
for example, from a PC, tablet or smart phone.
The IoT idea includes the possibility of connecting a WPAN, such as a ZigBee
network, to the Internet. In this case, the WPAN may have a single connection to the
Internet shared by all the nodes of the network, but the nodes will be individually
accessible from the Internet. The Internet connection for a WPAN is provided by a
device called an IoT Gateway. A basic system is shown in
Figure 7 below.
1.3.1 IoT Gateway
The IoT Gateway allows commands and data to be passed between the Internet and
WPAN domains, in both directions. The device runs a protocol stack for each of its two
sides, which are as follows:

IP Host: This side runs an IP stack to send/receive data packets to/from the
Internet - this is normally an IPv6 stack.

Control Bridge: This side runs a wireless network protocol stack to send/
receive data packets to/from the WPAN - this may be an IEEE 802.15.4-based
stack, such as the ZigBee PRO stack. This part of the Gateway usually acts as
a WPAN node, such as a Co-ordinator or Router.
The two stacks are connected within the IoT Gateway. The basic architecture of an
IoT Gateway is illustrated in
Figure 8 below.
Figure 7: WPAN Connected to IoT