沧浪之水

Release 99: Completed. First deployable version of UMTS. Enhancements to
GSM data (EDGE). Majority of deployments today are based on Release 99.
Provides support for GSM/EDGE/GPRS/WCDMA radio-access networks.

Release 4: Completed. Multimedia messaging support. First steps toward using
IP transport in the core network.

Release 5: Completed. HSDPA. First phase of IMS. Full ability to use IP-based
transport instead of just Asynchronous Transfer Mode (ATM) in the core network.

Release 6: Completed. HSUPA. Enhanced multimedia support through
Multimedia Broadcast/Multicast Services (MBMS). Performance specifications for
advanced receivers. WLAN integration option. IMS enhancements. Initial VoIP
capability.

Release 7: Completed. Provides enhanced GSM data functionality with Evolved
EDGE. Specifies HSPA Evolution (HSPA+), which includes higher order modulation
and MIMO. Provides fine-tuning and incremental improvements of features from
previous releases. Results include performance enhancements, improved spectral
efficiency, increased capacity, and better resistance to interference. Continuous
Packet Connectivity (CPC) enables efficient “always-on” service and enhanced
uplink UL VoIP capacity as well as reductions in call set-up delay for PoC. Radio
enhancements to HSPA include 64 QAM in the downlink DL and 16 QAM in the
uplink. Also includes optimization of MBMS capabilities through the
multicast/broadcast single-frequency network (MBSFN) function.


Release 8: Under development. Comprises further HSPA Evolution features such
as simultaneous use of MIMO and 64 QAM. Includes work item for dual-carrier
HSPA (DC-HSPA) where two WCDMA radio channels can be combined for a
doubling of throughput performance. Specifies OFDMA-based 3GPP LTE. Defines
EPC.

Release 9: Expected to include HSPA and LTE enhancements.


Release 10: Expected to specify LTE Advanced that meets the requirements set
by ITU’s IMT-Advanced project.

Technorati : telecom

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