Homework 4 03-18-2006

Why are the wireless application mentioned above
not doable by GPRS/3G, or Wi-Fi in terms of their
specifications?



3G/GPRS --- ~ /~2Mbps
1.傳輸速率及資料量小, 其他已執行尚ok.

Wi-Fi --- 2.4G/11Mbps -802.11b/g, 5G/54Mbps -802.11g
1.傳輸範圍小約300m,傳輸速率小無法行動通訊且不支援Qos,.

WiMAX --- 2-6GHz/75Mbps -802.16e
1.傳輸距離可達50公里,支援Qos,基地台架設成本比3G便宜