3GPP for GSM Carriers
UMTS: WCDMA, HSPA and SAE/EPS/LTE
The 3GPP project is responsible for the 3G specifications for GSM systems known as the "Universal Mobile Telecommunications System" (UMTS). Initially using the WCDMA air interface, it supports AAC music, AMR speech and MPEG-4 and H.264 video using the .3GP file extension. WCDMA was followed by HSPA (High-Speed Packet Access) technologies that have been deployed in the U.S. starting with HSDPA in 2005 (see HSPA).
Based on Release 8 of HSPA, future UMTS implementations include (1) a new IP core network that goes by two names: "System Architecture Evolution" (SAE) and "Evolved Packet System" (EPS), and (2) an air interface based on an OFDMA downlink and FDMA uplink, called "Long Term Evolution" (LTE). The SAE/EPS/LTE implementations are expected in the 2010 time frame. For more information, visit www.3gpp.org. See WCDMA, HSPA and GSM.
3GPP2 for CDMA Carriers
CDMA2000 and UMB
The 3GPP2 project is responsible for the 3G specifications for CDMA2000 systems. It supports the same audio and video formats as 3GPP plus the addition of QCELP speech in files with the .3G2 extension. For more information, visit www.3gpp2.org.
Expected in 2009, "Ultra Mobile Broadband" (UMB) is the next-generation data transmission for CDMA2000. With download speeds of at least 100 Mbps, UMB uses the OFDMA air interface and is expected to be compatible with CDMA2000 1X and EV-DO networks. See CDMA2000, IMT-2000 and IP Multimedia Subsystem.
![]() | Reproduced with permission from Computer Desktop Encyclopedia. Copyright (c) 1981-2008 The Computer Language Company Inc. All rights reserved. |
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