New wireless network technology for core technology of Internet of Things

Wireless Mesh Network, the Chinese name wireless mesh network , alias " multi-hop " network , it is a new wireless network technology completely different from the traditional wireless network .

Wireless mesh network, a mesh Routers (routers) and mesh Clients (client), wherein the mesh Routers configured backbone network and a wired internet network and is connected, is responsible for providing multi-hop wireless network connections for mesh clients.

In conventional wireless LAN (WLAN), each of the client to access the network by both a and AP (Access Point) radio link connected to form a local BSS (Basic Service Set). Users must first access a fixed access point (AP) if they want to communicate with each other . This network structure is called a single-hop network .

In a wireless mesh network, any wireless device node can act as both an AP and a router. Each node in the network can send and receive signals , and each node can directly communicate with one or more peer nodes. The greatest benefit of this structure is: If the last AP due heavy traffic congestion occurs, then the data can be automatically re-routed to a smaller neighboring node traffic transmission. And so on, the packet can continue to be routed to the next node closest to it according to the network , until it reaches the final destination. This access method is multi-hop access .

In fact, the familiar Internet is a typical example of a Mesh network. For example, when we send an E-mail , the e -mail does not arrive directly in the recipient's mailbox , but is forwarded from one server to another through the router, and finally reaches the user's mailbox after multiple route forwarding. In the process of forwarding , the router generally selects the most efficient transmission path so that the email can reach the user's mailbox as soon as possible. The wireless mesh network has the redundancy mechanism and rerouting function provided by the distributed network. In wireless Mesh network, if you want to add a new device, simply connect the power on it, it can configure itself automatically, and determine the best multi-hop transmission path. When adding or moving devices, the network automatically discovers topology changes and automatically adjusts communication routes to get the most efficient transmission path .

The ST BlueNRG series introduces the mesh concept for intelligent control without dead angle.