2.5G

CDMA Glossary

CDMA — 2.5G

 

 

 

 

 

 

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Information on 2.5G

One of the major limitations of second generation cellular communications systems is that data can only be transferred after a connection has been established. This is inefficient if only small amount of data is transferred, and in situations where data is transferred in bursts. 2.5G cellular systems allow a mobile station to be "always-online" for sending and receiving packet data. This allows efficient transfer of small amounts of data, without the overhead of establishing a connection for each transfer. It also efficiently supports bursty data transfers, avoiding the need to allocate capacity to a connection that cannot be reallocated by the network if the connection chooses not to use it. The two major forms of 2.5G enhancements to second-generation cellular systems are the General Packet Radio Service (GPRS) and Enhanced Data Rates for Global Evolution (EDGE).


Other topics in our resources on CDMA related to 2.5G include: 
 
  • first generation cellular (1G)
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  • second generation cellular (2G)
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  • third generation cellular (3G)

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