Riverstone Networks 9500 - Manual (Page 3)

Alcatel-Lucent 9500 Microwave Packet Radio North American Markets 3
To remain competitive in the rapidly
changing mobile marketplace, operators
need to deliver profitable new services
while reducing backhaul costs. Users
are expanding their demands beyond
basic voice and data services like instant
messaging and email; they want more
delay-sensitive applications, such as
media streaming and real-time multi-
media. To support these services,
broadband wireless technologies,
including High-Speed Download
Packet Access (HSDPA) and EVDO,
are providing higher transmission
speeds and packet interfaces. However, backhaul networks must
also evolve to meet these new band-
width demands at acceptable cost
points. IP transport offers a valuable
solution to help operators transform
networks and better manage growing
broadband traffic.
The Alcatel-Lucent 9500 MPR offers
a revolutionary way of transporting
packets natively. Using an innovative
approach to deliver the quality of
service required for each traffic type
dramatically reduces operating
expenditures (OPEX) and improves
the connectivity of Ethernet and
legacy T1 base stations. As a result,
the network can easily and efficiently
accommodate rapid growth in
multimedia traffic, with smooth
migration from TDM to IP.
Native transport of packet traffic
produces a clear gain in scarce radio
resources; while packet solutions can
absorb TDM traffic efficiently, TDM
solutions cannot handle packet
traffic cost-effectively.
Figure 1 compares TDM transport
and packet aggregation.
Meeting a key backhaul challenge –
the rapid growth of multimedia traffic
Packet
Radio Node
Aggregated Packet Traffic
Packets
Ethernet
“Data Aware”
Packet Aggregation
ATM NxE1
TDM NxE1
Cell Site
Cell Site
Cell Site
Cell Site
TDM Radio
Node
Overlay of Multiple Traffic
TDM
NxE1
Ethernet
2G
3G
E1 Stacking
ATM NxE1
TDM NxE1
2G
3G
Figure 1. TDM transport versus packet aggregation