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Sigma KEE - CellNetwork
KB Term: 
A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
cellular 行动网路
Relationships      
Parents WirelessNetwork A ComputerNetwork that uses some sort of communication not over a Cable at some point during every transmission.
Children 2GNetwork
 3GNetwork
 4GNetwork
 5GNetwork
 CDMA NetworkCode-division multiple access (CDMA) is a channel access method used by various radio communication technologies. CDMA is an example of multiple access, where several transmitters can send information simultaneously over a single communication channel. This allows several users to share a band of frequencies (see bandwidth). To permit this without undue interference between the users, CDMA employs spread spectrum technology and a special coding scheme (where each transmitter is assigned a code). (from Wikipedia)
 EDGE Network
 EVDO Network
 GPRS network
 GSM network
 HSPA NetworkHigh Speed Packet Access (HSPA) is an amalgamation of two mobile protocols, High Speed Downlink Packet Access (HSDPA) and High Speed Uplink Packet Access (HSUPA), that extends and improves the performance of existing 3G mobile telecommunication networks using the WCDMA protocols. A further improved 3GPP standard, Evolved High Speed Packet Access (also known as HSPA+), was released late in 2008 with subsequent worldwide adoption beginning in 2010. The newer standard allows bit-rates to reach as high as 337 Mbit/s in the downlink and 34 Mbit/s in the uplink. However, these speeds are rarely achieved in practice. (from Wikipedia)


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