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APPENDIX A
Super G
SuperG™ is an assemble of solutions that are Atheros® properties .They allow you to obtain
performances far superior to the IEEE802.11g standard .
Performance Security
Atheros® chip which has been purposely
developed for the property technology of
SuperG™, reaches a performance boost never
seen before , reaching results that are even
doubled contrasted with the ones from
IEEE802.11g devices .
The integration of an all-hardware engine which
allows the use of the best Wi-Fi protected access
(WPA) avoiding any loss of performance is an
highly relevant characteristic .
Technologies and Performances:
• Packet Bursting. It is a particular technique of transmission that aims to enlarge the throughput
reducing the usual overhead of the wireless transmissions. Every transmission is divided from
the following one by a period called Distributed Interframe Space (DIFS). After this weft all
the devices contend for the access. On the contrary when you use the Packet Bursting
technique you can have more transmissions taking place in a unique sequence.
• Fast Frames (dynamic transmit optimisations). This technique aims to enlarge the throughput
increasing the number of bits sent by frame and reducing the frame time itself. Both the
algoritmi for the contest and the frame structure itself have been improved in order to increase
the performances. This means that in every 802.11 frame they put no longer a single Ethernet
package of 1500 byte, instead the frame structure results from a range of elaborations aiming to
obtain optimum condition for the transmission speed.
• Data Compression. In the chip there is implemented an engine that uses a compression
algoritmo of the Lempel Ziv kind (similar to the Winzip one ). Any kind of transmission is
first compress , then transmitted and at last decompress by the receiver , in a totally clear way
for the user. It’s clear that , depending on the data sent , the earnings will be limited or relevant
• Turbo Mode .The range provided by different channels is being unified in order to double the
data rate. The Turbo Mode integrates the possibility to go back to a traditional use of the
channels in order to permit to the IEEE802.11g devices to operate correctly.With the Turbo
Mode the only channel used is number 6. The AD-Hoc mode is not supported with the Turbo
one.