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Tuesday, February 08, 2011

Mobile Multihop Relay


As WiMax spreads over the planet, poorly served areas can benefit from relays WiMAX 802.16j will fill every nook and cranny (sample: equipment DragonWave Inc.). Steve.

...forwarding traffic between wireless network nodes is also an interesting method to fill coverage holes and to improve in building coverage. At first, it might seem illogical that sending a data packet over the air interface more than once actually increases the data rate. In practice, however, transmitting the packet over two or more links with a high signal to noise ratio is better than only transmitting it once but very slowly because the signal quality is low.

The longest distance they have bridged with their kit so far at 50 MBit/s hiltop to hiltop was 75km. Another impressing number.
...Like all wireless systems, microwave links don't like things such as rain and snowfall. E1 based microwave links therefore need a security margin in order not to fail under such conditions. In the world of Ethernet, however, this margin can be translated into higher speeds when conditions are fine and the automatic link adaptation during rain and snowfall by automatically lowering the data rate. By prioritizing VoIP packets, it can be ensured that voice calls are not impacted by this while background priority traffic such as web browsing gets slower during such times
WirelessMoves: Microwave Backhaul
WiMax described paper10.pdfPublish Post