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Virtual Fiber Backbone:

 

Wireless transmission is achieved today by two main technologies such as point-to-point line-of-sight communications or  Wireless Local Area Network (WLAN).

Point-to-point line-of-sight communications mostly used for wireless broadband services and high data traffic backhaul over proprietary microwave wireless transmission technologies, however these two wireless links are not interoperable with other vendors technologies, once two such nodes get too far apart they can no longer communicate, and may result in frequency congestion in highly populated areas that prevent any throughout scalability in case the microwave line is not sufficient. Current Microwave backhaul  solutions can deliver certain throughput dictated by the proprietary microwave radio design of the specific vendor, where the main limitation of those systems is that they can only form single stream of data over single radio link, since it is impossible to run several radio links to the same direction in a line of sight, due to cross talk.

 

For wider area communications, Wireless Local Area Network (WLAN) is used. WLANs are often known by their commercial product name Wi-Fi. These systems are used to provide wireless access to other systems on the local network such as other computers, shared printers, and other such devices or even the internet. Typically a WLAN offers much better speeds and delays within the local network than an average consumer's Internet Access.  WLAN may use in mesh multi-path, multi-hop wireless local area network (WLAN) for outdoor. This wireless mesh network is managed at the layer 3 to to enable  network connectivity between sites over WLAN mesh networks . Current Wireless mesh networks are limited by the capacity of the wireless link , without the ability to scale throughput through aggregation of several links to transmit single IP stream, and in case of failure traffic need to reroute through alternate route using software base L3 protocols.

 

Ethernity offers solution that can connect multiple wireless links to form transmission of 10Gbps of wireless, where each link is directed in a way that will prevent interference between adjacent wireless links, with a potential maximum connectivity of 12 wireless links in a star connectivity, as depicted in the diagrams below

 

                 

        Figure 1 : Scalable Transmission over three wireless links

 

               

     Figure 2 : 10 Gbps transmission using 10 wireless links

A common solution to transmit higher throughput on multiple lower throughput links is LAG ( Link aggregation) , but again a single  IP stream can be tramitted on a single  wireless  link, since otherwise , it will result with packet reorder.

Ethernity offers unique packet transmission technology for carrier grade scalable 10G mesh wireless backbone in point to point and mesh network offering the use of off the shelf wireless technology with maximum availability and scalability.

This results with a scalable solution that can use off the shelf wifi technology running the same frequency that will result with dramatic CAPEX and OPEX reduction.

Ethernity solution runs packets or single IP stream over multiple links with the ability to transmit those packets over standard switches and construct the data to a single stream using packet reordering technology and jitter buffer.

Furthermore this technology results with maximum service availability , since in the case of wireless link or area failure , the stream was not lost and only suffer from certain bandwidth reduction , versus other mesh solution that will need to use routing protocols to reroute the traffic over other connection/links.

The above point to point solution can evolve to connect multiple points in a mesh topology, such that a single gateway device constructs original data stream coming from multiple sources. The solution includes two main devices :

  1. CPE that connect several stream sources , or links being part of a mesh , and routes data packets coming from other wireless links towards the gateway. Each CPE includes carrier Ethernet features such as QoS, OAM and CFM.
  2. Gateway – a single gateway that supports cluster of multiple CPEs that routes streams towards the right CPE, and collects fragments of packets from multiple CPEs to form the original stream

 

The below diagram describes the multi point  to point Ethernity’s wireless mesh networks.

 

           

      

          Figure 3 :  Multi Point  to Point 10 - 100G wireless backbone

    

       Virtual fiber backbone demo

   

     Video clip demo based on Ethernity Hardware is available under the following link :

        http://www.youtube.com/watch?v=RTX7lMtz27s

 

    In Summary Ethernity wireless mesh solution results with :  

 

  • 10Gbps wireless virtual connection – delivers packet transmission over multiple wireless links through maximum network availability while maintaining end to end network delay on flow by flow bases. 
  • Scalable throughput - Ethernity wireless backbone solution offers  multi point to point scalable wireless network through the ability to connect as many wifi links per virtual connection  together with single gateway to construct the original streams coming from multiple routes
  • Maximum Availability -  Supports scalable and maximum mesh network availability without the need to reroute the entire traffic in case of link failure. With Ethernity solution certain link or area  failure only decreases momentarily the throughout
  • Lossless - Equipped with 50ms buffering to enable retransmission in cased of failure in one of the links
  • Fiber Less to The Home – Fiber to the curve with directional wireless to home
  • Sourcing standard Wi-Fi - Use standard Wi-Fi technology without the need to cope with high operational cost of proprietary microwave technology
  • Data offload - Offers Wi-Fi offload and data traffic conversion to standard Carrier Ethernet network

 

       Ethernity's CEO TV interview on the Virtual Fiber Backbone

 

        http://www.youtube.com/watch?v=bnSAK5hO8FM

 

 

 

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