Wireless Networks

WiFi IEEE 802.11 a/b/g/n

Introduction

Wireless broadband solutions are ideal for providing high-speed connectivity and delivering valuable data, voice and video services to residents in difficult-to-reach and underserved communities worldwide.
Wireless technology can be an ideal solution for public and private operators, rural municipalities and public safety.
These solutions working on unlicensed bands of 2.4GHz and 5GHz enable the quick and cost-effective deployment of wireless broadband in rural areas, eliminating the high cost and long lead times of trenching and building wire-line infrastructure. When rough terrain or outlying location prohibits the development of hard communication networks, then wireless broadband is the solution which offer unique attributes for bringing last-mile connectivity to rural areas.

Our HiperLAN and WiFi solution

Our HiperLAN and WiFi radio link are the most flexible and scalable platform capable to enable service providers to compete successfully and profitably in the global wireless broadband marketplace. Our equipments operates on ISM Unlicensed band of 2.4 and 5 GHz offering the best cost-performance ratio connectivity option. The system offers execellent perfomance in line of sight (LOS) situations and non line of sight (NLOS) environments, being the platform perfect for applications such as high speed internet access, video surveillance, intercative gaming, control and remote monitoring of other systems.
Our Network components are streamlined with built-in installation and deployment assistance.
Based on open operating system the device integrates advanced IP features as an advanced firewall, a complete suite of routing protocol (BGP, OSPF), NAS capabilities to communicate with Radius AAA server, a built-in PPPoE and PPTP concetrator functionality.



Technical Description

Our equipments acts in multiple configuration:

• Peer-to-Peer L2 bridge
• Peer-to-Peer with routing functionality
• PMP Base Station with multiple sectors

• Device architecture based on AMD 500MHz chipset with 256MB DRAM and Mini-PCI RF modules
• Support UP 2 x Full Standard IEEE 802.11 abgnh
• 1 X 10/100 BASE-TX (Cat. 5, RJ-45) Ethernet Interface
• Channel Bandwidth 5MHz / 10MHz / 20MHz / 40MHz
• Wireless Mode: Station, StationWDS, AP Bridge, ad-hoc, HotSpot with Captive Portal
• Maximum Tx Power up to +24dBm
• Protocol SNMP,DHCP,NAT,OSPF,OLSR
• Security feature WEP/WPA/802.1X
• QoS based on WMM 802.11e
• Management with Http(s) GUI and full control through SSH session
• Integrated or Detachable antenna
• Powered by passive POE 7-20V
• Local storage on compact flash
• Temperature range -20C to +70C (System PCB optimized for low/hi-temp)

WiMAX

Introduction

WiMax (Worldwide Interoperability for Microwave Access) is a wireless broadband technology, which supports point to multi-point (PMP) broadband wireless access.
WiMAX is described in IEEE 802.16 Wireless Metropolitan Area Network (MAN) standard. It will provide a wireless alternative to conventional DSL and Cable Internet, especially in all that areas which are difficult to reach. What about the differences with WiFi 802.11a/b/g technology? While WiFi 802.11a/b/g uses Carrier Sense Multiple Access with Collision Avoidance (CSMA/CA) to transmit packets, WiMAX uses Time Division Multiple Access (TDMA). With CSMA/CA, all stations share the same radio channel and contend for access.
For example when an 802.11 station (client) needs to send a packet, the station first listens for other transmissions and then attempts to send frames when no other station is transmitting. If another station happens to be transmitting, all other stations will wait until the channel is free. A problem is that CSMA/CA causes stations to wait for an indefinite period of time, which in communications terms is referred to as asynchronous access. With this mode of operation, there are no regular time relationships associated with medium access. As a result, there's no guarantee of when a particular station will be able to send a packet. The lack of regular access to the medium draws down the efficiency of the system, which is not good when supporting voice and video information. The use of TDMA in WiMAX, offers a regular time relationship for network access. TDMA systems dynamically assign each station a time slot based on the station's need for throughput. The stations then transmit at regular intervals during their respective time slots, making more efficient use of the medium and improving support of voice and video applications applying efficient way QoS policy.
WiMax, is the second-generation protocol, allowing higher data rates over long distance, efficient use of bandwidth, and avoids interference almost to a minimum.

Our WiMAX solution

We provide a complete end-to-end Broadband Wireless Access (BWA) solution for both licensed and license-exempt frequencies enabling internet service providers to deliver high speed data and voice quality services. This solution is compliant with the IEEE 802.16-d standard and fully interoperable with third-party WiMAX equipment. We finally bring to the market a high performance and cost-effective WiMAX standard system for carrier-class deployments in all kinds of scenarios. Voice and data access in developing countries and areas with limited or no wireline infrastructure benefit from WiMAX technology. Quickly deployed, this solution is applied to a full range of applications from connecting buildings (for consumer and corporate purposes) to connecting individuals - anytime, anywhere.

Base Station Technical Description

ARBA-550 is, carrier-class WiMAX 802.16d base station for wireless access solution.
ARBA-550 is cost-effective and interoperable platform, enabling reduced Total Cost of Ownership (TCO). It is modular and scalable, and features flexible installation capabilities to enable a tailored solution to meet operator needs.
The highly scalable architecture of this Base Station has been optimized to maximize the functionality, offering:
• Extensive QoS control on multiple differentiated services and users
• Total control on the network parameters
• ARQ, data encryption
• Advanced management interfaces
• High power base stations.
ARBA-550 is an easy to install and low power consumption solution perfectly suited for rural WiMAX deployments, supporting solar-based power supply. Thanks to the use of wider channel bandwidths of up to 10MHz, this solution is able to provide an outstanding throughput-coverage performance comparable to expensive licensed band high power base stations.