NXP Semiconductors JN516x-EK001, Руководство пользователя, Страница: 37 / 86

JN516x-EK001 Evaluation Kit
User Guide
JN-UG-3093 v1.5 © NXP Laboratories UK 2015 37
2. Wireless Network Concepts
Before setting up a wireless network and running the supplied demonstration, you are
advised to study the background information on wireless networks presented in this
chapter. Only the basic concepts that are essential to using the evaluation kit and
demonstration are covered here - they are:

Radio frequency - see Section 2.1

Node types - see Section 2.2

Network identification - see Section 2.3

Network formation and topology - see Section 2.4

Software stack - see Section 2.5
The concepts covered are relevant to all the wireless network protocols supported by
the JN516x-EK001 Evaluation Kit - that is, JenNet-IP, ZigBee PRO and ZigBee
RF4CE. Note that all of these protocols are built on IEEE 802.15.4, which is also
supported on its own. For a more complete introduction to wireless networks, refer to
the manual for the relevant protocol (see
Section 4.3 ).
2.1 Radio Frequency
The JN5168-based devices of the evaluation kit communicate in the 2400-MHz radio
frequency (RF) band. This is one of the standard RF bands used by the IEEE 802.15.4
wireless network protocol (on which all the supported protocols are based), and is
available for unlicensed use in most geographical areas (check your local radio
communication regulations).
The 2400-MHz band spans radio frequencies 2400 to 2483.5 MHz and is divided into
16 channels, numbered 11 to 26 (the numbers up to 10 are used for other RF bands)
- see
Figure 27 below.
The channel of operation for a network can be specified by the application or,
alternatively, the network can search for the best channel (the one with least detected
activity) at system start-up.
Figure 27: 2400-MHz RF Band
2400 MHz 2483.5 MHz
Ch11 Ch12 Ch26 Ch13 .....
5 MH
z