[NetEase Smart News, August 16th] The Bluetooth Special Interest Group (SIG) released the Bluetooth network specification in mid-July, and its announcement heralded something more than the new wireless specification. This initiative formally established the latest major developments in mesh technology, which will increase its application in the Internet of Things.
The coverage of this technology on home and networked commercial devices is expanding and is dominated by a few mesh network standards or protocols. In 2004, the ZigBee Alliance first announced a low-power mesh network. Now you can find it in smart home solutions, including connected lighting products from Philips and Osram, and smart meters widely deployed in the United States and the United Kingdom. . The second-generation agreement launched in 2015, Threads, was launched in 2015 with Nest and Google as founding members and achieved great success.
There are more products on the market
Due to the availability of reliable low-power IP network connectivity, thread-enabled products have just been introduced. Companies like Eero are encouraging other vendors to develop mesh applications that are integrating their threading infrastructure with its grid-based Wi-Fi network. With Google, Samsung, Netgear, Linksys and Luma products, Wifi networks are becoming more and more common at home, which further increases the popularity of network usage.
Since the Internet of Things is full of mesh networking options, what else does Bluetooth need? This seems to indicate that they may be confusing when they join this field because the market is not sure which type of network should be used for each new type of IoT development. Each low-power grid technology has its advantages and best applications, so we will not have a unique grid standard.
In addition, the Internet of Things and Bluetooth technology provide developers with more tools to make it more popular.
However, Bluetooth technology connects 8.2 billion devices today and it is expected that by 2021, Bluetooth devices will be used for 60% of wireless devices (according to the ABI esearch study). There are also many different versions of Bluetooth, ranging from classic "one-to-one" communications to continuous voice/audio streaming or device-to-device data transmission to "one-to-many" broadcasts. Bluetooth is their latest product: adding "many-to-many" communications to large-scale networking applications such as asset tracking, home and building automation, lighting, beaconing, and smart metering.
Zigbee and threads pass information through a routing technique. In this technique, a message jumps from one node to another to reach the final destination. However, the Bluetooth network uses a "managed gushing out" technique in which every device in the network sends information to other nodes. Although it may be easier and more flexible to deploy on simpler applications, it also increases the latency and power consumption of some large-scale networks.
Why aggregate on the grid?
Although it is interesting to discuss the advantages of zigbee/thread routing and Bluetooth networking technology, developers only want to understand the answer to a question: "Why are so many wireless standards aggregated on the grid?" Let's consider the grid to the Internet of Things The benefits:
Extended range - In a star network topology, all devices must be within the radio range of the central device. Our mobile phone and Wi-Fi experience this: our calls may be lost, or our Wi-Fi connection is lost when we are out of range. For grids with other device routing messages, they can communicate even when they are not within range of each other.
Self-healing networks - Many early home wireless technologies supported multi-hop performance, but network settings were manually set during network installation. Radio conditions and environments change over time, and the grid provides autonomous self-healing by allowing multiple paths between the source and destination.
Enhanced network reliability - A well-designed and well-operated mesh network provides reliability because it can better bypass faulty or intermittent connections.
Scalability - As the network grows to hundreds of devices, having a single hub connection point can be problematic. Using a grid to build a larger, scalable network allows you to increase the network propagation radio load.
Improve energy efficiency and battery life - For devices that transmit frequently, transmission power is an important factor in battery life calculations. The grid enables these devices to use the lower transmit power and the powered routers to reliably handle communication problems.
A mesh system does not automatically solve all IoT problems. How the Bluetooth network behaves in a large-scale network in the real world remains to be seen. We need to see more actual operation of the Bluetooth domain to assess its feasibility, reliability, scalability, and performance. Interoperability especially becomes what really matters in the network. To date, Bluetooth-enabled products are usually point-to-point solutions, with one vendor controlling applications at both ends. However, in real-world grid applications, we will see multiple products from different manufacturers that need to interoperate with seamless message routing and security.
Just as Zigbee and threads solve the problems of interoperability and application layer challenges, Bluetooth networks will evolve to meet the needs of the growing and evolving IoT ecosystem. This gives developers and end users a new set of solutions for larger networks. (From: readwrite.com 牱耄   îºåºµ îºåºµ îºåºµ çŠç¬® çŠç¬® çŠç¬® çŠç¬® çŠç¬® çŠç¬® #
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