The Wireless Transmission Blog is #One

Today is the 1st anniversary of this blog!

It has come a long way in its first year and it is still the only blog that specializes in wireless transmission!

In the past year the blog has received more than 45,000 visitors. Topics have ranged from “Small Cell Mobile Backhaul: The LTE Capacity Shortfall” to “Just How Recyclable is my Radio?” and it has the luxury of a wide range of contributors.

The post that received the most hits was “What is Asymmetrical Link Operation?” and the post that received the most comments was “The World’s Longest All-IP Microwave Link”?
Thanks to the contributors and the people who took the time to comment.

We are looking forward to more insightful posts in 2012 including a daily commentary from Mobile World Congress in February. Stay tuned.

Aviat Networks

The Impact of Streaming Video on Wireless Network Services

Video call between Sweden and Singapore, on So...

Sustained video streaming, such as a video call over a mobile network, strains the stat mux paradigm of oversubscribing Ethernet microwave backhaul. However, proper management can ensure a consistent, high-quality user experience can be maintained. Image via Wikipedia (author: Kalleboo)

Mobile backhaul networks today support Ethernet microwave transport for 3G and 4G wireless technology services alongside legacy 2G and 3G TDM-based microwave equipment. However, as late as 2009 these wireless network services were solely TDM transport. One of the primary benefits of moving to Ethernet microwave transport has been the inherent statistical multiplexing (stat mux) gains. Stat mux relies on the fact that not everyone is “talking” at the same time and when they do, their IP radio packet sizes are variable, whereas networks based on TDM have to be provisioned statically for peak rates to individual wireless microwave sites.

With the advent of Ethernet, the typical practice is to oversubscribe all the wireless network services (based on individual peak rates) knowing that there is a statistical improbability of hitting the peak rate across all your wireless communication towers at the same exact moment.

Now enter video streaming where data is “streamed” between two wireless communication points over a sustained period (e.g., 30-second YouTube video clips, Skype HD Video Conferencing, Netflix movies). The sustained aspect of these video streams begins to strain the overall stat mux paradigm. Not only does video remain sustained but also it uses large-size IP radio packets that do not vary greatly. VoIP does the same thing, but the effect is much less significant as the overall bandwidth utilization is much lower.

Oversubscription becomes more challenging the more active video streaming is at any given moment. Imagine a scenario where the latest cat-playing-a-piano video gets posted online and everyone starts viewing it at virtually the same time. For a large swath of bandwidth, stat mux will reach zero for approximately four minutes. The upside is that you can add more bandwidth and/or offer differentiated wireless network services levels that guarantee certain bandwidth or application performance. Even so, video streaming does not totally negate the benefits of an Ethernet microwave transport, it just needs to be properly understood and managed to ensure a consistent user experience across all applications and services for your global wireless solutions.

Steve Loebrich
Director of Product and Solutions Marketing
Aviat Networks

Aviat Networks Achieves “Green” Building Certification

Leed Gold Certification
LEED Gold Building Certification

The Aviat Networks headquarters building in Santa Clara, Calif., has received LEED Gold certification from the U.S. Green Building Council (USGBC). LEED, or Leadership in Energy and Environmental Design, is an internationally recognized green building certification system developed by USGBC.

The Santa Clara building was designed with environmental responsibility in mind; following the five LEED credit categories for construction, décor and location:

1.    Site selection
Located close to Light Rail & Capitol Corridor Amtrak train service, the site is prime for reducing car-based commuting. Also, indoor secure bicycle storage, showers and changing rooms have been provided to promote cycling, which will can further reduce car-based commuting.

2.    Water efficiency
Aviat Networks installed water efficient fixtures that reduce water use by 40 percent compared to standard fixtures.

3.    Energy and atmosphere
We reduced heat island effect by installing cool roofing that has the ability to reflect visible, infrared and ultraviolet light, decreasing heat transfer to the building (i.e., high solar reflectance rating). Our advanced heating and cooling system has variable speed fans monitored by computer. We selected Energy Star rated equipment for the majority of office equipment and appliances. And all the building’s electricity comes from “green” energy sources (i.e., wind power).

4.    Materials and resources
During construction, waste was managed so that more than 95 percent of it was diverted from landfills through recycling and salvage efforts. Flooring is based on fast-growing renewable bamboo instead of non-renewable sources and the carpet is made from recycled content such as plastic bottles. Paints and coatings with low emission rates of volatile organic compounds and other air pollutants were used. And carpentry with composite wood products in doors and millwork was installed—saving some trees in the process.

Aviat Networks LEED Gold Certified HQ Building
Aviat Networks’ headquarters building in Santa Clara, Calif., has been certified LEED Gold as an environmentally friendly “green” building.

5.    Indoor environment
Low E glass windows and interior office-core windows can be left uncovered to allow for maximum natural lighting in the office area. Cube panels are lower and have windows to take advantage of the natural light. We also have a fitness center to promote employee health and wellness. Though this last category did not actually contribute official USGBC green credits to Aviat Networks’ LEED Gold certification, it demonstrates the company’s commitment to this process and contributes to overall employee well-being.

What’s the difference?
Do LEED buildings cost more? The answer is no. It is a design strategy that creates a building that will save energy and money over the long-term. It will also have limited effect on the environment and enhance working conditions.

TL 9000 and ISO 9001 Certification Impact on Wireless Communication

With full company recertification to the TL 9000 and ISO 9001:2008 standards, wireless communication network operators once againAviat Networks' TL 9000 and ISO 9001:2008 certifications can be sure that Aviat Networks has been fully qualified to supply them with the highest-quality products, services and solutions available to the global wireless solutions industry. In late 2011, Aviat Networks passed a full companywide audit for TL 9000 and ISO 9001:2008 industry standards for quality management. Awarded by Bureau Veritas Certification North America, the quality certifications are valid for three years. During this time, Aviat Networks will be making even more continuous improvements in quality for wireless communication network operators to use in their telecommunications solutions and wireless network services.

These certifications provide a guarantee to our customers that we can deliver on more than 90 telecommunications solutions-specific business methods and assurances—something you cannot get from a non-TL-certified vendor. In addition, we are the only specialist microwave solutions provider that is certified TL 9000 as well as one of only four TL 9000 certified microwave solutions providers overall. This is a major achievement for a company of Aviat Networks’ size.

Most importantly for mobile broadband solutions providers and other wireless communication providers TL 9000 is the telecommunications solutions industry’s “seal of good housekeeping.” It is a much more stringent standard to meet and a big step beyond ISO 9001:2008 certification, which can generically apply to a broad range of wireless technology as well as non-tech companies. An increasing number of customers worldwide now make TL 9000 and ISO 9001:2008 certification requirements for every wireless solution provider.

The TL 9000 quality management system was developed by QuEST Forum to meet the supply chain quality requirements of the global communications industry. Built on ISO 9001, it is designed for the communications industry. TL 9000’s purpose is to define unique communications quality system requirements for development, design, production, delivery and service. It specifies measurements for companies to help evaluate the effectiveness of quality improvement and implementation programs.

Scott Graham
Director Corporate Quality
Aviat Networks