BII Technology

BII® (/Bee/, Broadband for Industrial Internet) is an innovative {patented} long-range wireless broadband technology developed by Doodle Labs. It focuses on high throughput data communication over long range and provides frequency flexibility to operate in licensed and license free bands.

BII leverages state-of-the-art COFDM/MIMO technology used by IEEE 802.11 standard and extends it to meet the challenges of Industrial IoT applications. It is carrier grade and is field proven in some of the most demanding environments in the world by Fortune 100 companies. The mix of feature rich networking, long-range capabilities, choice of frequency bands, extensibility, and native IP architecture makes BII a state-of-the-art wireless communication technology for many Industrial IoT use cases.

Industrial IoT Connectivity Landscape

As the world becomes further connected and new applications arise, a diverse set of requirements emerge for wireless connectivity. Many technologies and standards have been developed to optimize for different applications and their corresponding requirements (e.g. range, power, speed). No single technology can meet the needs of each application.

WiFi is the uncontested choice for license free, high speed WLAN category. Bluetooth and a few variants of IEEE 802.15.4 are considered for very short-range applications. On the other end, LoRA, SIGFOX, and NB-IOT are discussed for the extremely long-range, low power, low throughput sensor connectivity.

BII has been designed to fill the gap for long-range and high-throughput communications. In particular, it marries the benefits of WLAN and cellular technologies.

WLAN or Cellular? Best of both.

BII combines the best of WiFi and cellular to offer an efficient, flexible, and economical connectivity solution ideal for Industrial IoT applications, whether indoor or outdoor and installed in public, private, or hybrid networks.

Public cellular LTE networks are often considered for Industrial IoT applications due to their easy access. For applications requiring broadband performance at medium to long ranges (about 100+ meters), the only possibility was to use public cellular networks. Large cellular networks are built for connecting very large numbers of people and to carry voice + data traffic. Their capacity is shared and hence they can only provide lower speed, low QoS, and high latency to each user. These networks are already struggling to keep up with the explosion of the data requirements from smartphone users and sharing these networks for demanding Industrial IoT traffic would not be the most ideal situation. Moreover, they have bad price-performance ratios given their high monthly recurring costs.

BII addresses this pain point by taking the COFDM/MIMO technology specified in 802.11 and optimizing operating parameters to create a new technology profile (i.e. waveform) that performs at long distances. All the benefits of WiFi, such as high QoS, low latency, and high speeds are extended to distances typically reserved for cellular technology.

BII fine tunes numerous physical and MAC layer parameters to achieve interference-resistant, robust, wireless broadband communication while preserving all the benefits of the 802.11 standard and its large ecosystem.

Application-Specific Optimizations

As Industrial IoT applications have become more demanding, they require more sophisticated networking capabilities. Instead of applying a single profile for different use cases – like generic WiFi would — BII creates a technology profile best suited to each use case.

For example, rapidly moving mobile vehicles require low latency communications, which are served by BII’s URLLC (ultra reliable low latency channel). As reliability is critical in most industrial applications, BII includes features such as MIMO, multipath, forward error correction, and ACK-retransmits.

For highly sensitive applications, BII features over the air 256-bit AES encryption into the profile. Our radios (BII nodes) are compliant with Federal NIST standards (e.g. FIPS 140-2 Level, NSA Type 1) and are deployed in numerous US Department of Defense programs of record.

Special Frequency Bands for All Markets​

A powerful feature of BII is that the frequency band and channel size are software defined. The BII waveform can operate in any frequency band between 100 MHz ~ 6 GHz. The channel size can be software defined between 3-40 MHz as required by the application’s throughput requirements. The ability to define the channel size coupled with auto adjusting bit coding rates allows BII to be spectrum efficient and operate at the maximum signal-to-noise ratio possible. In some international markets only small amounts of spectrum are available (traditionally reserved for cellular), so the 3 MHz channel size opens up the potential to use BII technology.

Key BII Features

State-of-the-art Performance RF
  • Long range and high throughput
  • Available in 100 MHz – 6 GHz frequency range in form factor compatible models
  • Interference resistant COFDM/MIMO for improved link quality in difficult RF environments;
  • Exceptional Multipath performance for NrLOS obstructions
  • Adaptive radio modulations from BPSK up to 64QAM, with continuous per packet optimization to maximize link performance in dynamic environments
  • Software defined channel size for efficient re-use of spectrum
  • Software defined operating frequency for global applications
  • Time Division Duplexing (TDD) for bi-directional traffic
  • Convolutional coding, Forward Error Correction (FEC), ACK-retransmits, Maximal Ratio Combining, Spatial Multiplexing, Beam forming and Space Time Block Coding for robust data transmission over noisy spectrum and dynamic directional orientation due to roll and pitch of mobile vehicles
  • Fast handoff for mobile applications
Performance Networking
  • Ultra-Reliable Low Latency Channel (URLLC) for Command and Control as well as optimized video streaming channel on the same radio link
  • End-to-end IP architecture for Unicast and Multicast traffic
  • 256-bit AES encryption for over the air data

Prism WiFi Technology

Industrial and Federal OEMs often have a range of wireless spectrum they prefer to use, especially given the environmental noise at WiFi frequencies. The traditional issue with communication systems at licensed-band frequencies has been their limited customer base, which has limited the amount of development investments. In turn, the licensed band communication systems tend to be limited in performance, inflexible, and expensive.

Doodle Labs took the approach of using 802.11 standards and chipsets as a starting block rather than designing licensed-band systems from scratch. From there, super heterodyne technology, whose principles have been around since World War 2, is used to shift the operating frequency of traditional WiFi (2.4 and 5 GHz) to any frequency between 100 MHz and 6 GHz. We call this Prism-WiFi technology, which brings all the benefits of Long-Range WiFi protocol to licensed-band spectrum. The Prism-WiFi has earned NSA’s most demanding certifications and has been employed in numerous DoD Program of Records.

Over the years, the Prism-WiFi technology has matured and can provide high performance and cost-effective SDR solution. Doodle Labs engineers have a systematic way to optimize performance at target frequencies. Doodle Labs can achieve COFDM/MIMO operation in as small as 3 MHz channels. Small channel sizes allow broadband connectivity in unique channel plans and private spectrum.