Unleash the potential of IoT and create a low-power managed network system
It is now possible to connect low-power nodes to the Internet with a variety of different wireless technologies.
In all wireless technologies, communication in the Sub-1 GHz band enables the farthest range with lower total system cost and complexity. At the same time, Sub-1 GHz is more suitable for indoor environments such as offices, buildings and homes, and has the lowest power consumption.
However, if you want to unlock the full potential of the Internet of Things (IoT), it is not enough to just create a link connecting the node to the Internet.
Cloud management systems for diagnostics and automation require a single control of a large number of sensors. Central servers in factories, buildings, and retail must implement large-scale program management and automation to reduce maintenance costs.
Consumers at home need a central hub similar to the security system's alarm panel to ensure that the data flow of the various low-power sensors and nodes is consistent and ready to connect to the Internet.
As a solution for IoT, wireless connectivity meets the needs of system deployment for a large number (from tens to hundreds) of "live" nodes. This also means that the purpose of the definition technique is to identify the type of data transmitted by the nodes in different scenarios.
So how can we take advantage of Sub-1 GHz as a wireless communication link and realize this potential while transforming it into a connectivity “system†solution?
We need to provide a network infrastructure to ensure that a large number of nodes can be easily built and maintained, and that communications are secure. All nodes must search for a connectable network and use this network for communication. Their roles and services must scale over time while maintaining link maintenance.
We must ensure the reliability of the node when transmitting and receiving data, and make full use of the transmission space to avoid data communication congestion and network failure. This can ultimately lead to a bad user experience or affect the battery life of the node itself.
In a variety of scenarios, we need to be able to serve different types of traffic specifications. For example, in a common sensor network like a diagnostic system, data is reported to a central hub. On the other hand, in a retail network, for example, most of the data will be sent to peripherals, such as retail servers that send updated pricing information to the terminal.
While satisfying the above conditions, it is also necessary to maintain low-power operation and enter a sleep mode when the node is not in the data communication state. However, seeking the best power consumption also means reducing the "boot" time of transmission and reception as much as possible, and using the least amount of power in the active mode.
Finally, we must be able to communicate with the Internet via the IP to the local data communication within the Sub-1 GHz network.
Designers now face the design challenges of trying to meet all of these requirements by the new TI 15.4-Stack software solution. The software developed by TI provides IoT with a true application-based Sub-1 GHz connectivity solution.
Figure 1: The new TI 15.4 Stack is a standard Sub-1 GHz wireless network solution
TI 15.4-Stack is a software development kit (SDK) running on the SimpleLinkTM Sub-1 Ghz CC1310 wireless microcontroller (MCU). Based on the proven IEEE 802.15.4 standard, it is capable of performing the 'g' revision of the operational specifications of the Sub-1 GHz band in North America and Europe (developed by FCC and ETSI, respectively).
The IEEE 802.15.4 standard is used as the data link layer for many common network interconnection standards currently on the market, such as 6LoWPAN, Wi-SUN, ZigBee®, Thread, and WHART. The stability of the wireless infrastructure is guaranteed by features such as air mediation (implemented via CSMA-CA), acceptance, retransmission, and built-in AES security.
In order to improve the robustness and reliability of the link, TI developed a frequency hopping mechanism for the US FCC band. This mechanism relies on the Wi-Sun FAN standard, and TI optimizes its low-power operation. Applications can benefit directly from the robustness of the link, which provides lower data latency and lower power consumption (avoiding retransmissions).
The TI 15.4 Stack software can be configured for asynchronous or synchronous operation, for battery-powered sensors on the one hand, and for receiving coordinated downlink traffic with low-power nodes for different applications. Type of demand.
In addition, the TI 15.4 Stack software is based on TI-RTOS and comes with a complete set of application examples for sensors and collector devices. Both applications have a logical link controller module that operates on the 802.15.4 standard and includes network and device management programs.
This provides a complete reference solution for users of software that solves the design challenges of building a hostable low-power network. TI 15.4 Stack software supports device deployment from 10s to 100s based on selected configurations.
The TI 15.4 Stack software also includes a Linux-based gateway software that can execute local network controller and collector applications. Through the gateway software, data entered by Sub-1 GHz peripheral nodes can be monitored and activated in a web browser interface.
This new software is based on TI's low-power development platform, including: TI SimpleLink CC1310 LaunchPadTM development kit and SitaraTM AM335x processor BeagleBone Black development board. With the support of the BoosterPackTM development kit ecosystem and plug-in modules and the TI-RTOS framework, users can easily scale their applications.
Using narrowband modulation to achieve the best sensitivity and immunity with limited external crystal cost, TI 15.4 Stack software unlocks all the benefits of Sub-1 GHz wireless in IoT.
By providing a fully referenced system solution for low-power managed networks, users can easily integrate Sub-1 GHz wireless functionality into their existing networks.
Creating web applications with a large number of low-power nodes, covering the entire building, the entire house, or the parking lot area is now more than just a task for wireless technology experts.
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