HSBRA: fast roaming High Speed Broadband Radio Access Reicom Wireless products and technologies
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HSBRA™ (High Speed Broadband Radio Access) is a set of filtering, equalization, digital conditioning and management of the radio signal at Layer 1 & 2 of the ISO-OSI model, that gives any radio transceiver a better hearing, regardless of its modulations, while moving at any speed. A radio with a better hearing translates into a radio that, on equal modulation, performs better in LOS & NLOS condition, range and can provide broadband services in much harsher environments; in fact HSBRA™ optimizes and manages all the electromagnetic channel phenomena like fading, shadowing and Doppler spread.

HSBRA™ Baseband is not a proprietary solution: it is the way, at Reicom, we manage the radio signal and IEEE data packets that is very innovative and does make the difference with other radio manufacturers.

HSBRA™ is the “core” of the physical layer of Reicom radios from the antenna up to LLC (Logical Link Control). HSBRA™ OFDM Baseband introduces some new features in management of low level physical signal that enables Reicom transceiver to hook the “network signal” in 94 µsec or make “hard handover” in 273 µsec at LLC level. These capabilities combined with other FPGA coded algorithms and IP give Reicom transceivers the capability to instantaneously establish real and perfectly operative link with other transceivers and, after this, to keep this connection stable, time deterministic and highly resilient to the surrounding interference phenomena (shadowing, fading, Doppler spread, etc..).

 

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HSBRA  

Thanks to its timing, stability, reliability and deterministic broadband performances, HSBRA™ makes a difference in every Vehicle to Vehicle (V2V) and Vehicle to Infrastructure (V2I) applications, addressing both safety e non safety critical applications.
The physical layer of the HSBRA™ supports joint time, frequency synchronization and adaptive channel estimation. The channel estimated at the beginning of a packet frame is updated during reception in order to cope with channel variability.

HSBRA™ features apply to both well known modulation, i.e. IEEE 802.11 a/b/g/n and new emerging ones, e.g. IEEE 802.11p, DSRC and IEEE 802.20. It can also apply to IEEE 802.16 (WiMax) as well as to 3G and the new LTE mobile networks from phone carriers and operators.

Thanks to the HSBRA™ broadband baseband, all IEEE standard 802.11 a/b/g/n/p radios can:

  • At least triplicate the wireless coverage
  • Work perfectly in tunnels and in indoor environments
  • Achieve astonishing results in NLOS conditions (urban environments)
  • Achieve outstanding PER (Packet Error Rate) in the order of 0,004, or 1 packet loss every 4.000.000
  • Achieve impressive QoS (Quality of Service) comparable to copper wire or fiber optic links
 

Last but not least, the HSBRA™ performances are coming from usage of Reicom SDR radio fitted with one single antenna and therefore working in half-duplex mode. This initial configuration has been selected because it brings with it simpleness (one antenna equals one hole in the roof of the vehicle) and reduction of installation costs. Nonetheless HSBRA™ works also on MIMO architecture solutions that are under development.

HSBRA™ also plays an important role in enhancing Reicom wireless security; blending together part of Layer 2 of the HSBRA™ with the higher Layers 3 and 4, of the Clancast™ protocol stack, Reicom radio can support hardware based coding and encryption algorithms that, in real time, scramble and encrypt data using state of the art solutions, like AES 128 and 256 bit encryption, as well as MIL compliant data scramble encoding schemas.

HSBRA™ Baseband is a fast, predictive and “Eco-Wireless” core radio engine that manages the output power of each transceiver in continuous manner, using only the right energy needed in any specific conditions. This saves power and gives the products equipped with Reicom technology the possibility to contribute to a “Eco-Wireless” deployment.

HSBRA

  Physical and MAC layer: IEEE 802.11 standard based
  Interoperability: IEEE 802.11 Wi-Fi, license free
  Future standards: IEEE 802.11p and DSRC ready
  Digital OFDM class Baseband: it includes a specific set of IP and algorithms synthesized within FPGA and processed, electronically, at the maximum speed today possible by the modern silicon. Among these there are specific convolutional coding algorithms, puncturing e depuncturing algorithms, a full state Viterbi convolutional decoder, a real time hardware interleaver against burst noise and an hardware scrambler for data whitening, an automatic front-end auto calibration algorithm that works together with an automatic power back-off algorithm, a specific IP for the heuristic prediction of the radio channel status.
  LOS & NLOS: stable, reliable and deterministic broadband link
  Eco-Wireless: continuous automatic output RF power adaptation
  Hardware encryption: absolute security of wireless link
  Geopositioning: Real Time 2D and 3D tracking for military and special applications

 

Sample of HSBRA performances on Reicom SDR tested @ over 300 Km/h VALUE

Maximum radiated power

From 20 dBm up to 33 dBm E.I.R.P.

Mobile communication range
with omnidirectional antenna

1-2 Km in NLOS, up to 3 km in LOS

Transmit Power Control (TPC)

Continuous according to vehicle distance, speed...

MAC algorithm

Full CSMA/CA in Hybrid MESH network; TDMA for Government and military application

Modulation scheme

BPSK, QPSK, 16 QAM, 64QAM over OFDM

Data rates

3/6/9/12/18/24/27 Mbps tested @ 370 Kph

Communication mode

Half-duplex (single antenna): unicast, multicast, cell broadcast

Channel duty cycle

Worldwide standard: 1%

Hook-up time

94 µsec

Hand-over (roaming) time

273 µsec @ LLC Level, 1 msec overall at application level

Channel switching time

From 27 µsec up to 200 µsec according to IEEE modulation, frequency and regulamentation

PER

0.004, Typical 0.01

QoS 99%

Antenna

One antenna for both transmitting & receiving, MIMO supported

Tested in mobility with Reicom OFDM SDR Radio Platform
     
 
     
 
   
   
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