Riverstone Networks 9500 manual Compares TDM transport and packet aggregation

Meeting a key backhaul challenge – the rapid growth of multimedia traffic

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.

Figure 1. TDM transport versus packet aggregation

2G

3G

Cell Site
2G
3G		Overlay of Multiple Traffic
TDM Radio	TDM NxE1	TDM
Node		NxE1
Cell Site
	ATM NxE1
	Ethernet
		E1 Stacking

Cell Site
			Aggregated Packet Traffic
	Packet	TDM NxE1	Packets
Cell Site	Radio Node
		ATM NxE1
		Ethernet	“Data Aware”
			Packet Aggregation

Alcatel-Lucent 9500 Microwave Packet Radio North American Markets 3