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Institute for Information Transmission Problems of Russian Academy of Sciences
Wireless Router RAPIRA
RAPIRA is a system for implementing distributed wideband wireless networks providing an access to the Internet, telephony, and other public networks. With RAPIRA one can build corporative networks integrating video, voice, telemetry, etc.
RAPIRA is developed by the Institute for Information Transmission Problems of the Russian Academy of Sciences.
Product Highlights
- Point – to – (multi)Point configuration
Brief description
Wireless Router RAPIRA is an outdoor device and can operate under hard weather and temperature conditions. This feature allows one to place the device in immediate vicinity of antenna using a short feeder (low signal fading).
RAPIRA operates at 2.3 – 2.5 GHz and at 4.9 – 6.1GHz.
Maximum bit rate – up to 108Mbps. Effective bit rate – 45Mbps. Maximum link radius for point-to-point link – 50km (with amplification of dish aerial 32dB and bit rate 6Mbps). Special XR mode using low bit rate (3-0.25Mbps) is supported, which increases device’s sensitivity by 10-13dB in the case of signal drop. In Access Point mode, RAPIRA allows up to 250 clients.
RAPIRA is a four-in-one device supporting functionality of a Wireless Bridge, a Router, a Firewall and a VPN PPtP Access Server.
Supported topologies
RAPIRA admits arbitrary topology networks: point-to-point backbones, long-distance lines with retransmission, point-to-multipoint cellular networks (with a single base station covering variety of clients).
Point - to - Point
Point –to -MultiPoint
Repeaters Line
Wireless equipment
The following equipment can be used for abovementioned topologies networks:
- Wireless Router RAPIRA with one or two wireless interfaces
- Directional planar antenna, amplification 20-26dB
- Beam dish aerial (narrow-directional parabolic antenna), amplification 28-34dB
- Antenna with pie diagram (30-120 degrees) in the
horizontal plane, amplification
14-17dB - Boosters with output 0.25-1 watts
Wireless Router RAPIRA is a multi-purpose device. It supports functionality of a Wireless Access Point, Wireless Client or WDS Repeater. For RAPIRA with two wireless interfaces, the interfaces can be independently configured to perform in different modes, e.g. Access Point mode and Client mode.
Depending on chosen topology and calculated line parameters, RAPIRA is supplemented with a pie diagram antenna(s) for a base station or a directional antenna(s) for a wireless client or for a point-to-point link. Thus a system to be install at every point of the network results.
Typical link distances and bit rates
Typical link distances and bit rates are calculated assuming free space signal propagation, 99.95% (ITU 530-8) link availability and external 25dBi antenna.
We assume that the transmitter antenna and the receiver antenna are within line of sight (LOS) and adequately adjusted, no noises at operating frequency, all connectors are properly assembled, and 8D-FB feeder is not longer than 1m.
Table 1 Maximum point-to-point link range
Dish aerials with amplification of 30dB and 0.9m in diameter are used.
Table 2 Access Point – Client link
For client, dish aerials (narrow-directional parabolic antenna) with amplification of 30dB are used. For access point, pie diagram antenna (16dB, 7x60 degrees) is used. We give an approximate calculation for downstream (from access point to client) and upstream (from client to access point).
Nearby clients in urban zone can operate out of the field of vision (NLOS). Operation ability for a client should be determined experimentally.
Technical specifications
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