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Anleitung Zusammenfassung
The Alcatel-Lucent 9500 MPR allows mobility, utility and public service providers to efficiently accommodate rapid growth in data and multimedia traffic because packets are handled natively and transmission is adapted to the propagation conditions and quality required by different types of services. 2 Alcatel-Lucent 9500 Microwave Packet Radio North American Markets 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 multimedia. 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 bandwidth 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 The need for IP transformation The growing demand for new broadband services requires more connectivity and additional ports at cell sites. Packet traffic growth drives bandwidth requirements higher (20 Mb/s to 30 Mb/s per cell site); it also has different capacity and quality constraints than voice traffic As mobile network infrastructure evolves, IP-native base stations will have Ethernet interfaces rather than T1. This change in physical interface brings new challenges to backhaul networks. Because the transition will not happen overnight, backhaul networks must migrate gracefully while supporting a mixed payload of legacy TDM and growing packet traffic. The evolution of microwave radio from TDM to packet technologies enables data-aware transport, which can support new high-bandwidth services while leveraging existing technologies. IP transformation typically seeks to achieve four major goals: • Gradual transformation of the network, focusing on areas where compelling events force investment in a solution • Return on investment in less than two years (as a result of OPEX savings) • Minimized OPEX despite capacity increases; requires optimizing the use of scarce resources and aggregating all services over a single pipe, with no overlays • Use of a multi-vendor model with standard protocols and no proprietary equipment Data traffic is growing fast, but revenues are not increasing at the same pace; this creates a need to find more efficient ways to transport the additional packet traffic Figure 2 shows the evolution of traffic and revenue. IP TransForMaTIon DrIvers • The need for additional connectivity to introduce new broadband technologies and services, such as HSDPA, EVDO, Wireless Fidelity (WiFi) hotspots, and Worldwide Interoperability for Microwave Access (WiMAX) • Increased bandwidth requirements for new packet- based services (20 Mb/s to 30 Mb/s per cell site) • Ethernet interfaces to eliminate the need for separate overlay networks to support Ethernet connectivity and backhaul Figure 2. Traffic and revenue evolution with a massive introduction of broadband services Traffic and Revenue Divergence Time Revenues Voice Era Data Era Packet Traffic Alcatel-Lucent 9500 Microwave Packet Radio North American Markets An innovative, truly packet product The Alcatel-Lucent 9500 MPR helps ensure optimal performance for all types of backhauling technologies and enables smooth evolution of existing TDM-based networks to an all-IP network. It aggregates any kind of incoming traffic, including Second Generation (2G), Third Generation (3G) and WiMAX. Performance and low latency are improved for each service, and synchronization can be achieved along the entire backhauling network...