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Standards such as IEEE 802.11, Bluetooth, Zigbee, etc. are growing in popularity and customers often have questions as to how Linx narrowband solutions compare. Engineers sometimes lump wireless solutions into the same category, when in fact, they differ greatly in approach and purpose. Consider, for example, a brief summary of three of the most popular standards today:
- 802.11 products, designed for wireless ethernet applications, can reach tens of meters in range, and achieve data rates from 5.5Mbit/s to 54Mbit/s
- Bluetooth, a subset of the 802.15 wireless personal area network (WPAN) standard, has a range up to 10 meters (although this can be extended at the expense of increased power consumption) and a data rate of around 1Mbit/s
- ZigBee has a range up to 75 meters and a data exchange rate of 250kbit/s using 2.4GHz (10 channels), 40kbit/s at 915MHz (6 channels), and 20kbit/s at 868MHz (single channel)
From this quick summary of just three standards, even a lay person can see that there are significant differences between wireless architectures. Engineers without deep expertise in each RF standard may find themselves ill-equipped to analyze competing technologies or implement the chosen solution.
It would be a misconception to view standards-based solutions as similar to Linx products. Linx RF modules are intended to meet the needs of a distinctly different market. While there is some overlap in targeted applications, the standards above are generally not comparable or competitive within the low-power narrowband marketplace served by Linx. Let’s take a brief look at why that is.
In the electronics industry, standards are often implemented to ensure consistency, compatibility, and interoperability. A standard often defines a wide range of attributes, including physical, electrical, protocol, and security features. Standards provide a common framework to allow powerful, secure wireless communication between network participants. For data transfer at high rates among multiple devices, complex network topologies, or to allow a high degree of interoperability among multiple product suppliers, a standards-based solution may be ideal.
But standards can also limit design flexibility by locking engineers into rigid hardware or software frameworks. The standards listed above are all designed for a network environment and employ complex and confining physical specifications. Even highly qualified engineers may find hardware attributes and complexity cumbersome or unworkable for simple RF applications. Standards-based protocols are also often inappropriate or overkill for the simple transfer of low-speed serial data, analog signals such as voice, or the pulse trains of many RKE devices. These limitations decrease design flexibility and increase the level of engineering and test expertise.
Unlike standards-based solutions, Linx modules provide a compelling blend of simplicity, versatility, low-power consumption, cost-effectiveness, and a transparent interface which does not require a particular packet structure or manipulate the data in any way. This gives a designer total freedom in defining protocol and device interaction. Solutions from 1-to-1 links to complex networks with thousands of nodes may be realized, and proprietary or standardized data structures implemented. In all cases, the simplicity and transparency of the physical hardware greatly lowers the barrier of entry in comparison to standards-based solutions. Most importantly, engineers of all skill levels can quickly and cost-effectively bring wireless products to market and quickly return to their primary engineering focus.
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