Wireless Backhaul Solutions

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1 A White Paper from Telco Systems Wireless Backhaul Solutions

2 According to Infonetics, there are 3 major factors forcing a migration to packet backhaul. The first is found in the rapidly increasing numbers of mobile subscribers, expected to reach 4.4 billion worldwide in The second is an explosion in mobile data and video use requiring providers to significantly increase bandwidth offering. Last, heavy competition will force operators to upgrade their network capacity to improve and add new subscriber services including BTS/NodeBs, WiMAX and LTE. The report by Infonetics, Mobile Backhaul Equipment, Installed Base, & Services Market Outlook also states that by 2011, service providers using PDH, ATM over PDH or SONET/SDH for their mobile backhaul connections will be paying roughly 3X to 40X as much in service charges per connection as those using, DSL, coax cable, or PON. It s obvious that these providers will be looking for transit operators who can offer a hybrid approach to mobile backhaul using current TDM technology for 2G and 3G voice, and packet technology for the growing data and video services.

3 Wireless Backhaul Cell sites need to support all types of radios T1, and, and both 2G and 3G services. In fact 80% of 3G cell sites are collocated with 2G cell sites. While transport providers are migrating to based radios to support new handsets which have an data stream, they also need to support older handsets (2G and 3G). Telco Systems offers a variety of options for delivering a flexible wireless backhaul solution to cell sites or microwave radio sites using native, TDM over, over PDH, or over SONET. hese solutions fit transparently into the provider s network offering a cost effective means to deliver IP services and achieve higher bandwidth efficiencies while retaining their existing infrastructure. Migration to IP/ According to some industry estimates, deployment of new 3G and 3.5G wireless networks will require two to four incremental of traffic. For providers and operators alike, this is not an effective solution. Additional mean high tariffs as well as more complex management. Migrating to is becoming increasingly recognized as the best transport technology to address these high-speed requirements. over SONET over SONET (EoS) offers a convenient and standardsbased method of combining and TDM-based services over existing Fiber networks. The majority of base stations have T1 or T3 connections today; SONET solutions that support EoS facilitates backhaul of these T1/T3 services while offering expansion to newer -based services. In addition to service flexibility, This paper will look at each of these solutions with a focus on how operators can achieve an efficient and cost-effective migration to without cannibalizing existing services. SONET provides for the highly resilient network requirements prominent with service provider, utility and government microwave radio applications. over PDH PDH (Plesiochronous Digital Hierarchy) refers collectively to T1/E1 and T3/E3 circuits which provide traditional copper-based services. EoPDH enables and IP services to be delivered over the PDH network. It utilizes the existing copper plant to enable high bandwidth without extensive infrastructure changes. EoPDH offers up to up to 45Mbps (28 T1 s or one T3). Utilizing EoPDH offers multiple revenue generating services over a single UNI including internet access, managed VoIP, access to a managed IP VPN, and E-Line and E-LAN VPNs. It enables next generation radio access networks from cell sites to interface to existing microwave radio equipment and PDH backhaul circuits. Finally, it addresses the underserved sub-10mbps business services market that currently rely on the existing copper access (TDM) network. migration typically begins at the endpoints by adding base stations. This diagram shows Telco Systems EdgeLink Mini-Mux 2000 connected to 2G and 3G base stations with copper T1/E1 circuits and EoPDH. These circuits are combined into a single or 4 separate T1/E1s and fed into the TDM transport network to support 2G and 3G/3.5G handsets. An existing SONET site uses the EdgeLink OTM 1000 for over SONET as well as T3. As bandwidth demands dictate and service availability increases, newer cell sites may be constructed for IP traffic to support newer handsets and radios. TDM over Circuit emulation sends TDM traffic over in either a structure-agnostic mode where T1/E1 frames are sent intact, including the CRC, or a structured mode where individual timeslots can be sent to different destinations. Encapsulation of the traffic can be IP packets, packets or MPLS VLL. Timing is delivered using either external or internal timing mechanisms and derived timing can be exported to other TDM ports (BITS from GPS). There is also an optional cellular-grade clock recovery over packet. 3

4 Cell Site Interconnectivity Most cell sites utilize T1 circuits. In order to avoid the high tariffs associated with each T1 connection, transport providers backhaul multiple circuits into a single or connection. The EdgeLink Mini-Mux 2000 combines the functionality of a Add Drop Multiplexer (ADM) with support for. Using the latest in standards-based over PDH (EoPDH) technology, the Mini-Mux 2000 maps into T3 or T1 facilities allowing operators to fully leverage existing T1 networks as well as. The Mini-Mux 2000 supports point-to-point, linear add/drop, or ring add/drop topologies. In a linear add/drop radio network, typically deployed by utilities and in various government applications to provide voice and data services to remote locations, up to 28 DS1s can terminate at the head end. Alternatively, where a full is not required, NxT1 spurs from higher capacity radio chains can be provisioned to improve T1 service provisioning at remote locations. to for Remote Microwave Radio Some radio sites are located on mountain tops where line of site transmission is possible to achieve long distances. Managing these sites can be a challenge, especially during inclement weather. Telco Systems T-Marc service demarcation solutions enable remote management of radios. Advanced Layer 2 Networking using Telco Systems Access allows total flexibility in deployment, provisioning, and delivery of services. Using attributes such as transparent Operations, Administration and Maintenance (OAM) and remote system management, the T-Marc family provides an optimal solution for remote radio sites. Similar to a T-carrier/E-carrier CSU/DSU, this solution enables proactive fault management by performing remote troubleshooting, loopbacks, and statistics collection for performance management. Microwave Radio Network Extension Remote Location Remote Location Ring Remote Location This all microwave network extends the reach of your network, aggregates your traffic to reduce operational costs, and validates your service quality with loopbacks, and embedded testheads for delay, jitter, and latency. Main Office Voice Switch microwave radio rings may be deployed where resiliency is a key requirement, especially critical for utilities, government, and many enterprise networks where there is a need to bypass leasing T1 s. This Mini-Mux 2000 solution offers significant saving over SONET, while providing sub-50msec resiliency in a ring topology. Remote management capabilities saves truck rolls for circuit churn. 4

5 Wireless Backhaul Solutions from Telco Systems Fiber Access and Aggregation Gig-E, 10 Gig-E, 10/100/1000BTX, CES (T1/E1, OC3) Point to Point, Ring, Mesh, etc Products: T-Metro, T5C, T5C-XG Pseudowire (CES) Gig-E, 100BFX, 10/100/1000BTX, T1/E1 Point to Point. Point to Network, Ring Products: T-Metro, T-Marc Intelligent Demarcation Gig-E, 100BFX, 10/100/1000BTX, T1/E1 Point to Point. Point to Network, Ring Products: T-Marc Microwave Links DS1,, OC3, STM-1 or Radios Terminal, LADM or Ring EoPDH, EoS,, T1/E1,, STS-1, CES Products: MM2000, MM840, T5C, T-Metro, T-Marc, OTM1000 Fiber TDM Access SONET OC3 or STM1 Terminal, LADM or Ring Drop ports EoS, and/or T1/E1 Products: MM840, ExMux II, OTM1000, ELHub For more information om wireless backhaul solutions, contact Telco Systems at or call us at , or toll-free in the US at

6 Telco Systems, Inc., a BATM Company 2 Hampshire Street, Suite 3A Foxboro MA USA (USA) While every reasonable effort has been made to ensure accuracy and completeness, the authors assume no responsibility for the use of any information contained herein. All trademarks are the property of their respective owners. Copyright 2008 Telco Systems. All rights reserved.

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