NEXT GENERATION BACKHAUL NETWORKS
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1 NEXT GENERATION BACKHAUL NETWORKS AVIAT NETWORKS Presented By Vishnu Sahay 1
2 Visionary Adaptive Agile 2 AVIAT NETWORKS May 18, 2010 By Your Side
3 Evolving Backhaul Requirements Base Stations with 50 Mbit/s or more can now be anticipated thanks to 3G and 4G HSPA/LTE and WiMAX Applications Current BTS capacity is limited to a few T1/E1 s based on voice TDM traffic In between BTS capacity needs to evolve, especially where a mix of data and voice traffic needs to be transported 3 AVIAT NETWORKS May 18, 2010
4 Cost Effective Solutions Needed Going forward best solution is carrier ETHERNET scalable, flexible, QOS, MPLS PBB-TE Given existing BTS backhaul networks - which are based on TDM - need cost effective solutions to expand capacity to transition to full Ethernet solutions 4 AVIAT NETWORKS May 18, 2010
5 Ethernet vs TDM Cost: Ethernet delivers more cost-effective bandwidth than other technologies Scalability: Ethernet supports speeds from a few Mbit/s to many Gbit/s Flexibility: Ethernet supports easy convergence of mobile backhaul with other network applications, including network security QoS: Ethernet supports operator prioritization of traffic, e.g. voice vs. non-real time data 5 AVIAT NETWORKS May 18, 2010
6 Landscape: Network Migration Plans and Today s Microwave Systems All TDM Today Network migration path All IP TDM IP Region of Effectiveness Region of Effectiveness TDM ONLY Radio Legacy TDM radio Legacy systems Optimized for TDM Not designed for IP poor efficiency HYBRID Radio Native TDM, Native IP Transport for effective migration to IP IP ONLY Radios New IP radio Built to carry IP Typically no native TDM (force use of pseudowire) 6 AVIAT NETWORKS May 18, 2010
7 Mixed Mode Growth by overlaying Ethernet on to existing TDM; maximizing existing infrastructure and preparing for growth beyond it 7 AVIAT NETWORKS May 18, 2010
8 All-Ethernet and Pseudo-wires Replace existing TDM with Ethernet but provide for existing TDM connections using Pseudowire Loss of overhead and synchronization is an issue Economics of replacement is an issue 8 AVIAT NETWORKS May 18, 2010
9 Eclipse Multi-Transport Technology Options BSC RNC MGW BSC NodeB TDM NodeB NATIVE TDM IPoTDM ML-PPP HYBRID BSCNodeB ETHERNET/IP TDMoIP Pseudowire ALL-IP BSC NodeBeNodeB 9 AVIAT NETWORKS May 18, 2010
10 Hybrid Microwave Radio HYBRID Microwave Radio Enables Seamless Migration While Supporting ALL-IP Future Hybrid Enables: 1. All - TDM 2. All - IP 3. Emulated TDM over IP OR Any combination of the three All-IP IP-only HYBRID Microwave Radios combine traditional microwave requirements with new IP features all in a single platform Native TDM HYBRID Radio TDM Native IP Flexible Bandwidth Allocation P W E IP/Ethernet Integrated Pseudowire 10 AVIAT NETWORKS May 18, 2010
11 Example Trade-Off Available DS1 Wayside Channels 11 AVIAT NETWORKS May 18, 2010
12 Equipment Capabilities Required for Ethernet Operations The extended packet switch plane should support multiple GigE user interfaces It should also provide for pseudowires to enable transport of legacy PDH service over the packet switched network Network Synchronization IEEE 1588 v2 A hybrid approach should also be retained to allow for some TDM for traffic requiring high synchronization not available by pseudo-wire. 12 AVIAT NETWORKS May 18, 2010
13 Other Capabilities Required for Backhaul IP/MPLS and edge routers for connection to the core network Bandwidth optimization and traffic aggregation Higher order modulation, e.g. 256 QAM Adaptive Coding and Modulation (ACM) Cross Polarization Interference Cancellation (XPIC) and Co- Channel Dual Polarized (CCDP) links Resilient Ring Protection technology (e.g. RSPW), Virtual LAN Capability, Advanced OAM, etc 13 AVIAT NETWORKS May 18, 2010
14 Multi-Protocol Label Switching Accepts multiple protocols, including IP, ATM, Frame Relay and transport layers such as Ethernet, SDH, PDH, SONET Encapsulates protocol, destination and other relevant information for onward transmission Requires edge routers for traffic ingress and egress 14 AVIAT NETWORKS May 18, 2010
15 Data Optimization/Traffic Aggregation Reducing or compressing data can provide dramatic capacity efficiencies on backhaul connections; 2G and 3G circuit-switched connections are converted to packet-based data and aggregated (multiplexed) using the aggregation capabilities of a layer 2 Ethernet switch Aggregation permits dynamic use of trunk capacity for data when voice traffic is reduced 15 AVIAT NETWORKS May 18, 2010
16 Higher Order Modulation Higher order modulation yields maximum througmb.s in hput per channel, e.g MHz with 256 QAM 365 Mbit/s in 56 MHz with 256 QAM 1 STM-1 (63 E-1) in 28 MHz for SDH signals These capacities can be doubled using XPIC with co-channel dual polarization (CCDP) 16 AVIAT NETWORKS May 18, 2010
17 Adaptive Modulation Permits high data rate throughput during clear air and high reliability voice and other time sensitive traffic during clear air In clear air 256 QAM; in fades, down to QPSK 17 AVIAT NETWORKS May 18, 2010
18 XPIC and Co-Channel Dual Polarized links The XPIC option provides two parallel communication links on the same RF channel. Both vertical and horizontal polarizations used with CCDP 18 AVIAT NETWORKS May 18, 2010
19 Conclusion Due to rapid growth in demand for mobile back haul generated by 3G and 4G the call for increased capacity in existing networks is anticipated Ultimately IP/Ethernet based backhaul links will be required to meet capacity demands To grow from existing plant cost effective growth solutions are needed This presentation has discussed how some manufacturers have prepared for this evolution through the use of hybrid network solutions in which systems can evolve from native TDM to pseudowire TDM and from IP over TDM to IP only. 19 AVIAT NETWORKS May 18, 2010
20 ADDITIONAL SLIDES
21 Comparison of Radio Architectures CAPABILITY TDM ONLY IP-ONLY HYBRID High TDM throughput YES NO YES High System Gain YES NO YES Low TDM latency YES NO YES High Redundancy YES YES YES Scalable TDM interfaces YES NO YES High IP Throughput NO YES YES Synchronization in All Packet Network Easy migration to IP without antenna upgrade MPLS or Carrier Ethernet Support All indoor or split mount options with common IDU NO NO Risky Packet Sync YES Keeps TDM Sync NO NO YES YES YES YES NO YES YES Integrated pseudowire NO Maybe YES New security features NO Maybe YES 21 AVIAT NETWORKS May 18, 2010
22 What is a HYBRID Microwave Radio? All Indoor or Split Mount with Same IDU Native TDM Transport Supports ALL-TDM Scalable TDM Interfaces Low latency Transport of TDM Full Reliability and Redundancy HYBRID Microwave Radio PWE Integrated Pseudowire Native IP Transports All-IP Synchronization Distribution over All- IP Transport Gigabit Transport Capacity New Security Features L2 Networking Options (MPLS, IP, Carrier Ethernet) HYBRID Microwave Radios combine traditional microwave requirements with new IP features all in a single platform 22 AVIAT NETWORKS May 18, 2010
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