Thread network

One 、OpenThread resources

There are two types of OpenThread file ：

GitHub — Focus on setting 、 How to build a sample platform 、 How to use tools

openthread.io — Focus on OpenThread News and features 、 Use cases 、 guide 、API Reference resources

Two 、Thread The Internet Basics

https://openthread.io/guides/thread-primer

1、Thread The Internet Base directory

1. What is? Thread？
2. Node roles and types
3. IPv6 Addressing
4. Network discovery and formation
5. Router selection

stay Thread In the network , Nodes are divided into two forwarding roles ：Router and End Device.

2、Thread The Internet Of role

（1）Router

Router The behavior of nodes is as follows ：

1. Forward packets for network devices
2. Provide secure access for devices trying to join the network commissioning service
3. Always turn on its transceiver

（2）End Device

End Device The behavior of nodes is as follows ：

1. Mainly with single Router communicate
2. Does not forward packets to other network devices
3. You can turn off its transceiver to reduce power consumption

（3） Summary

Thread The device can be Router（ Father ） or End Device（ Son ）

Thread The device can be FTD（ maintain IPv6 Address mapping ）, It can also be MTD（ Send all messages to its parent node ）

REED It can be upgraded to Router,Router It can also be downgraded to REED

Every Thread Each network partition has one Leader To manage Router

Border Router Used to connect to Thread And other networks

One Thread The network may consist of multiple partitions

3、IPv6 Addressing

Thread The network consists of three domains ：Link-Local、Mesh-Local and Global

Thread The device has a variety of unicasts IPv6 Address

RLOC It means that the device is Thread Location in the network

ML-EID For Thread The device is unique , And should be used by the application

Thread Use multicast to forward data to node groups and Router Group

When the destination is RLOC When unknown ,Thread You can use anycast

3、 ... and 、OpenThread Simulate the first Thread The Internet

（https://openthread.io/codelabs/openthread-simulation#0）

Here it is Codelab in , You learned how to ：

1. Startup and management OpenThread Simulation Docker Containers
2. simulation Thread The Internet
3. Verify thread nodes
4. Use OpenThread Daemon management Thread The Internet

Four 、 take OpenThread Porting to a hardware platform

take OpenThread Porting the stack to a new hardware platform involves several steps （https://openthread.io/guides/porting）：

1. Set up the build environment
2. Definition CMake The rules
3. Implement the platform abstraction layer API
4. Realize advanced functions （ Hardware abstraction layer ）
5. Verify port
6. Certification and readme documents
7. Hardware platform requirements