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Published: June 2009
35 Pages (PDF)
Author: Frank Ohrtman
Single-user $ 495 US
Company-wide $ 1,995 US
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Single-user
$ 495 US
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Company-wide
$ 1,995 US
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Overview
It is imperative that WiMAX service providers build and maintain their
own "middle mile" infrastructure backhaul networks. This is especially
true of rural areas where the incumbent telephone company has the only
"middle mile" connection to the outside world. Any service provider
that might pose a competitive threat to the incumbent would be wise to
avoid relying on that incumbent competitor for their vital connection to
an IP backbone. In addition, any service provider vying for federal grants
or loans to build new "last mile" broadband access would be wise
to demonstrate to federal officials that they have constructed an independent
middle mile that provides a "diverse path" or a redundant connection
to the Internet for the communities to be served.
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Key Findings
- Building a Last Mile broadband network without a diverse and robust Middle
Mile to support it will be a waste of grant dollars. Wireless backhaul
solutions such as licensed microwave and gigabit Ethernet solutions provide
very cost effective alternatives to expensive fiber optic cabling (and
trenching).
- Wireless backhaul solutions are just as reliable as fiber optic cable
- Wireless backhaul networks can be planned in a matter of days as opposed
to years for fiber optic cabling
- Wireless Middle Mile infrastructure may be an important priority for the BTOP
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Target Audience
- BTOP grant applicants
- Public sector IT directors
- Incumbent telecom operators
- WiMAX solution providers
- Vendors for WiMAX and/or the enterprise industries
- Enterprise personnel responsible for computing and communications
- Investors in the WiMAX space and/or enterprise automation
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Table of
Contents
Executive Summary 4
Wireless Middle Mile Solutions 5
Backhaul Requirements 9
Licensed Microwave Wireless Backhaul Solutions 10
Licenses protect the links 11
Gigabit Ethernet Wireless Backhaul Solutions 13
60 GHz: Millimeter-wave 13
80 GHz: E-Band 13
Advantages of the 60 and 80 GHz Bands 14
Very Narrow Beamwidth 14
Range and Throughput 15
Security 16
Quality of Service (QoS) 17
Interference mitigation 18
Frequency Reuse 19
Rain fades 19
Reliability/availability 20
Ease of Licensing: E-Band in the US 20
Conclusion 20
Architecture for Middle Mile Infrastructure Networks 22
Considerations?? 22
Backhaul Architectures 23
Star 23
Mesh 24
Ring 27
Consecutive Point Network 29
Conclusion 32
About the Author 33
Tables
Table 1 Comparison of wireless backhaul technologies 5
Table 2 comparisons pf beamwidths for wireless backhaul solutions 15
Table 3 Range and throughput parameters for 60 and 80 GHz backhaul solutions 15
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Frank Ohrtman has almost 20 years experience in VoIP and wireless applications. He is the president of WMX Systems, LLC, a Denver, Colorado-based consulting and systems integration firm. Mr. Ohrtman learned to perform in-depth research and write succinct analyses during his years as a Navy Intelligence Officer (1981-1991) during which he specialized in electronic intelligence and electronic warfare. He is a veteran of U.S. Navy actions in Lebanon (awarded Navy Expeditionary Medal), Grenada, Libya (awarded Joint Service Commendation Medal), and the Gulf War (awarded National Defense Service Medal).
His telecommunications career began with selling VoIP gateway switches for Netrix Corporation to long distance bypass carriers. He went on to promote softswitch solutions for Lucent Technologies (Qwest Account Manager) and Vsys (Western Region Sales Manager). His consulting clients include national governments and tier one telephone companies.
Mr. Ohrtman is a Gerson Lehrman Group Scholar (http://www.glgcouncils.com) and serves as Dean of WiMAX for Applied Learning Solutions (http://www.e-als.com). He is a regular blogger and contributor to WiMAX.com (http://www.wimax.com) and annual presenter at WiMAX World (http://www.wimaxworld.com) as well as local Cisco Users Groups. Mr. Ohrtman serves as an advisor to Bush Telecommunications Pty Ltd and the Rural Broadband Consortium of Australia.
Mr. Ohrtman holds a Master of Science degree in Telecommunications from Colorado University College of Engineering (master's thesis: "Softswitch As Class 4 Replacement-A Disruptive Technology"), a Master of Arts degree in International Relations from Boston University and a Bachelor of Arts, Political Science, from University of Iowa
Frank may be reached at Frank@MindCommerce.com
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