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To do so, the most important issue was the best harmony of hardware and software.
So, to come true them, the following development task had been progressed.
A. Hardware : FPGA chip, which is charge of MAC function for high speed WLAN
bridge.
B. Software : Device Driver and WLAN bridge software module, which is charge of
MAC function for high speed WLAN bridge.
C. System : Test set which above H/W and S/W are applied.
In conclusion, J-MAC technology is self-developed MAC protocol by JMP Systems
Co., Ltd., and the main objective is to improve transmission ability up to2 times than
existed WLAN system.
3. Significance of J-MAC protocol
WLAN worldwide standard, IEEE 802.11 is created through study and examination of
numbers of scholar and high technicians who work for the best technical companies.
So, IEEE 802.11 has technical profundity and without full understanding and practical
experience about IEEE 802.x -worldwide standard of WLAN technology, network
technology, Ethernet, bridge and internet protocol-it is very hard to approach to
IEEE 802.11.
The number of companies who develop IEEE 802.11b WLAN's MAC protocol is a few
in the world, and most of those companies use their firmware as it is. That is, it is
said that this field has very high technical barrier, H/W and S/W should be most
suitable harmonic.
At present, for most of WLAN products,Intersil's MAC chip and Firmware is utilized.
So, their real data speed is limited to 4.8Mbps, which is existed indoor WLAN data
speed. In conclusion, when outdoor WLAN bridge is needed, indoor-purpose AP is
used with very expensive antennas and real performance is poor.
J-MAC technology was created based on 1) full understanding about theory about
