Cisco 3825 - Manual (Page 15)

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Cisco 3825 Mobile Wireless Edge Router Software Configuration Guide
OL-15667-03
Chapter 1 Overview of the Cisco 3825 Mobile Wireless Edge Router
Introduction
Figure 1-3 Example of Cisco 3825 Router in a PWE3f
Cisco Iub Optimization over IP
The Cisco Iub Optimization over IP technology for R4/R99 (ATM) UMTS RANs improves bandwidth
efficiency by as much as 15 to 40%, corresponding to a UMTS voice call capacity gain of 18 to 67%,
depending on the type of Iub header and ATM Adaptation Layer traffic sub-cell multiplexing
performance. For R5/R6 IP UMTS RANs, Cisco provides compression and low-overhead encryption.
Intelligent Cell Site IP Services
Cisco’s RAN-O solutions also open up the possibility to deliver new profit-enhancing services. This is
achieved through the rich set of IP networking features supported in Cisco IOS Software that are now
extended to the cell site (see
Figure 1-4 on page 1-6 ).
Cell Site Points-of-Presence (POPs)
Since many cell sites are located in and around downtown areas, hotels, airports, and convention centers,
they make attractive sites for co-locating public wireless LAN (PWLAN) access points and other
wireless data overlays. Many of these wireless data radios are IP-based. IP networking features, like
Mobile IP, VoIP, IP Multicast, Virtual Private Network (VPN), and content caching, enable delivery of
new revenue-generating services over these radios. Cisco also provides a wide range of low-latency
IP-based quality of service (QoS) and traffic shaping models to allow flexible mixing of multiple traffic
types across the same backhaul network. Thus, the cell site becomes a physical point of presence or POP
from which to offer hotspot services, or voice and wired Internet service provider (ISP) services to
nearby enterprises and residences. The corresponding traffic “rides for free” on the spare backhaul
bandwidth made available by Cisco’s Abis and Iub Optimization solutions.
ATM/TDM ATM/TDM xconnect xconnect
MPLS/IP or L2TPv3
Pseudowire
Emulated Circuit
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