Cisco ASR 5000 Series, Обзор продукта

Страница: 977 / 992

Cisco ASR 5000 Series Product Overview ▄
OL-22938-02
Chapter 33
Glossary
1xEV-DO. See EV-DO.
1xEV-DV. The third phase of CDMA2000 following 1xEV-DO deployment. 1xEV-DV stands for 1x Evolution - Data
Voice, and is characterized by a maximum data rate of 5.2 Mbps and the ability to support wireless Voice over IP
(VoIP) services.
1xRTT. The first phase of CDMA2000, characterized by the ability to support a maximum data rate of 1.44 Kbps.
1xRTT stands for 1x, denoting the one radio channel of 1.25 MHz in Radio Transmission Technology.
2G. The second generation of wireless technology that was characterized by its use of digital transmissions rather than
analog methods. Radio bandwidth is used for data transmissions. Data transmissions are limited to a maximum rate of
1.44 Kbps for CDMA 2G services (9.6 Kbps for GSM 2G). Radio bandwidth is consumed whenever the Mobile Node
(MN) is connected to the Internet, regardless of whether it is receiving or transmitting data. This is based on the IS-95A
standard for CDMA.
2.5G . An evolutionary step between 2G and 3G wireless services wherein two enhancements were introduced over 2G.
The first is that the MN only consumes radio bandwidth when data is being transmitted or received. The second is that
the maximum data rate increased to approximately 64 Kbps. Most 2.5G services only support data rates between 1.15
Kbps and 384 Kbps. This is based on the IS-95B standard for CDMA.
3G. The third generation of wireless technology, wherein data services are packetized, with speeds up to 2 Mbps. Based
on the CDMA2000 standards.
3GPP . Third Generation Partnership Project. A group of organizational partners from ETSI, TIA/EIA, and other
standardization bodies who are working together to define the evolution of GSM-based wireless communication core
networks.
3GPP2 . Third Generation Partnership Project 2. A second group of organizational partners from ETSI, TIA/EIA, and
other standardization bodies who are working together to define the evolution of CDMA-based wireless communication
networks
A
A10. The subscriber data portion of the R-P interface (based on GRE as defined in RFC-2784 and IP Encapsulation
Within IP as defined in RFC-2003).
A11. The control portion of the R-P interface (based on Mobile IPv4 as defined in RFC-2002).
A11 Manager. A task within the system that controls the signalling de-multiplexing tasks of the A11 interface used for
wireless communications.
AAA. Authentication, Authorization, and Accounting. The security and billing methodology used by operators to
ensure a user's identity and to determine their network usage so that they are properly billed. Often interchanged with
the Remote Authentication Dial In User Service (RADIUS) protocols.
AAA Manager . Accounting, Authentication, and Authorization Manager. software task that performs all AAA protocol
operations and functions for subscribers and context-level administrative users within the system.
ACL. Access Control List. A filtering mechanism used by many access IP routers that controls which traffic may be
received or transmitted on an interface or port.