A market survey and analysis presentation from Frost and Sullivan on “WiMax” and “Wireless Sensor Network” were conducted in my company this morning. A hugely disappointment, nothing special and nothing new, the presentation was mainly for top management peoples without any technical knowledge. It seems that the presenter thought that the target audiences are all marketing peoples. It must be a joke! He said that he doesn’t know the operators in Malaysia which offers cellular service.
Well, the conclusion for his presentation:
WiMax – 802.16d (fixed) will be died and look for research in 802.11e (mobile and fixed)
WSN – ZigBee will be in leading position compared to the other standards.
ZigBee Protocol is similar to the one used by WiFi, known as CDMA/CA. Find out more from this web-site. Interesting stuff.....
2 comments:
Err... Zigbee not the same as WiFi. The can have TDMA as well as CSMA. And the CSMA algorithm is slightly different if I remember correctly.
Anyway, maybe the consultant thought it was a Malaysian company so can play play a bit. You better write and complain to his boss.
Quote from ZigBee Standard:
The IEEE 802.15.4-2003 MAC sub-layer controls access to the radio channel using a CSMA-CA mechanism. Its responsibilities may also include transmitting beacon frames, synchronization and providing a reliable transmission mechanism.
Quote from IEEE standard:
The CSMA-CA algorithm shall not be used for the transmission of beacon frames, acknowledgment frames, or data frames transmitted in the CFP.
If referring to the IEEE 802.15.4 standard, the algorithm is different with WiFi. You are correct.
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