The latest version of Bluetooth 5.0 (BT5) will significantly expand the reach of personal area networks (PANs) and mesh networks and further challenge Zigbee technology in the field of home and building automation. In the long term, vendors and analysts have called for interconnection across different networks to enable interoperability in the emerging Internet of Things (IoT).
The Bluetooth SIG, in one fell swoop, raised BT5's peak transmission rate from 1 Mbits / s to 2 Mbits / s and its connection range from 30 meters to 100 meters. According to the Bluetooth SIG, when it officially released the BT5 and mesh networking specifications, these enhanced capabilities and greater volume of broadcast data will make "our app-paired-to-device Mode to "connectionless" IoT service development. "
Chip designed for BT5 also must expand the physical layer is expected before the end of this year can begin shipping. The hitherto unknown BT mesh specification will be compatible with existing chips and is expected to appear earlier.
Andrew Zignani, analyst at ABI Research, a market research firm, said the move allowed Bluetooth to extend beyond homes and courtyards, using smartphones or tablets as controllers, eliminating the need to use home gateways like Zigbee Device.
Through the mesh network, Bluetooth is even able to penetrate applications such as smart buildings and smart cities. However, he added, "It must also be gradually integrated into IoT gateways or hubs of various wireless technologies including Wi-Fi, ZigBee, Thread and Z-Wave" to fully implement IoT.
"Coverage is paramount and faster and better for smart homes and buildings," said Eran Sandhaus, vice president of wireless at Cypress Semiconductor. Cypress also recently acquired Broadcom's IoT business.
Cypress has now begun to sample a new Bluetooth chip, through the built-in boost power amplifier to extend the connection range to 400 meters, but the price is higher power consumption. "The market is looking for higher-than-expected demand for long-range Bluetooth," Sandhaus stressed, and customers will use the chips to control everything from home patio sprinklers to parking meters.
In order to expand the transmission range, BT5 will use a more sophisticated receiver design than a Cypress-developed transmitter. The specification also supports a higher 8x broadcast data transfer rate, improving its indoor location app and mesh networking applications.
Zignani of ABI Research pointed out that mesh networking specifications will significantly extend the range and number of nodes that Bluetooth supports, as well as take advantage of the information shared across the nodes for a variety of smart applications.
Compared with ZigBee and Thread used by the way, mesh network will use other easier way to build. However, Zignani points out that the trade-off is that "all nodes receive and transmit information, and are even irrelevant, meaning that the device must spend more time waking up and transferring information that is not necessarily needed, adding network power Load. "
The result is "the delay is not too serious ... While it consumes more power, you can move the information farther and more easily." Cypress's Sandhaus added that these enhanced capabilities will Making Bluetooth more and more capable of competing with Zigbee for consumer and business sensor nodes and other applications.
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