As was demonstrated by the tragic events in Boston April 2013, cell phone networks cannot accommodate every potential caller or texter using a mobile access device in times of peak load usage—such as during a crisis occurring in real-time on television and social media. Erroneously, some pundits at the time ascribed the outage to a co-conspiracy to take down the public wireless networks. Or an action by the civil authorities to thwart additional remote control saboteurs as has happened in Spain and other places. However, the simple truth is that demand far outstripped capacity for a time in Massachusetts due to the fact that mobile phone networks are designed to function with a typical level of subscriber activity—calls, text, mobile web, etc. When virtually everyone in the vicinity of the finishline of the Boston Marathon unlocked their iPhone or Samsung Galaxy smartphone and started to communicate the unfolding story to the outside world, it came as no surprise to network designers at the mobile operators that the infrastructure slowed to a crawl then ceased to work for a time. But this was news to the general public.
Q: Can Extra High Power (EHP) Radios Reduce Need for Space Diversity (SD) in Microwave Networks?
- EHP radios can reduce need for SD in some microwave networks by providing an optimum level of system gain, which will reduce fading—the problem SD was intended to mitigate
- Non-reflective paths will benefit the most from EHP
- Benefits include decreased numbers of antennas and lower capex
- For example, in a recent project using EHP radios, Aviat reduced the number of required antennas by 9.27 percent and capex by 5 percent
In Australia, the federal government has had an ambitious plan to connect all citizens to a national broadband network (NBN). However, in some of the more remote parts of the country, of which there are more than a few, the incumbent provider, Telstra, cannot deliver that subscriber experience. This leaves it to alternative access providers to fill the gap.
One of these providers, Aviat partner MIMP Connecting Solutions, decided to use Aviat Networks microwave solutions to reach remote customers beyond the NBN fiber footprint. This is important as many vulnerable subscribers need to be connected to doctors, nurses and other healthcare professionals for help. Literally, this can be a matter of life or death. Continue reading
The point of this post is to determine the amount of latency reduction possible with a one box integrated microwave router solution when compared to a two-box (separate router + microwave) offering. By how much does the one box solution improve latency?
Latency is important to all network operators. The lower the end-to-end delay the better it is for all types of applications.
For example latency is critically important to mobile network operators (MNOs) for LTE Advanced features like coordinated multi-point (COMP) and MIMO, which require extremely tight latency. CRAN architectures are also demanding tighter latency from the backhaul.
In addition, for latency sensitive applications like Teleprotection, SCADA and simulcast in private markets such as public safety, utilities and the federal government will greatly benefit from lower latency network performance. For other customers, lower latency is critical for synchronization and HD video transport. Continue reading
When designing microwave networks, backhaul engineers have a wide variety of techniques at their disposal. One method that remains highly effective is Space Diversity (SD). With SD, two antennas separated by some distance can increase the availability of a link from something less than 99.999 percent to in excess of five-nines uptime. However, the introduction of a second parabolic antenna on a microwave path poses a substantial increase in the capital expenditure (capex) budget.
Cisco routers remain the backbone of internet connections worldwide. Deep in the heart of networks, core routers perform the essential plumbing of the web. Further out on the edges, access routers provide connectivity for mobile devices via microwave radios (many of which are Eclipse radios from Aviat Networks). Generally, routers assume a full 1 Gbps bandwidth capability between Layer 2 connections provided by microwave radios.
However, modulation and channel size selections can vary the actual bandwidth between 1 Mbps and 1000 Mbps (i.e., 1 Gbps). This can also happen when Adaptive Coding Modulation (ACM) is activated on a point-to-point microwave link and the link’s bandwidth varies based on propagation conditions. If congestion occurs on the link, the router cannot quickly prioritize traffic nor select the optimal path, resulting in possible “black holing” of critical traffic. Continue reading
The public safety market has relied for many years on Aviat Networks to be a supplier of mission-critical microwave backhaul equipment. For example, since the introduction of the Eclipse microwave radio a few years ago, it has been received very successfully in the Australia public safety market. In the last five years, Aviat has sold and deployed thousands of radios (i.e., TRs) in the public safety and life critical radio ecosystem.
“The cutting-edge Gigabit Ethernet and IP capabilities of Eclipse were critical for Australia government agencies,” says Raj Kumar, vice president, sales and services, Asia Pacific, Aviat Networks. “As radio sites rolled out across Australia, Eclipse has enabled efficient deployment of multiple radio carriers in a single chassis—a mission-critical advantage for the simulcast trunking sites.” Continue reading
You may have noticed we’ve been talking a lot lately about our new 39dBm EHP radio (the most powerful digital microwave radio ever built by the way). We’ve been getting a phenomenal response to this product mostly because of the real business benefits it delivers…benefits largely related to the antenna.
As a rule of thumb in microwave backhaul, the more powerful the radio (i.e., system gain) the smaller the antenna has to be (i.e., overall diameter). More than any other factor, smaller antennas drastically lower the total cost of ownership for microwave. Continue reading
Through various innovations, wireless transport technology has consistently surpassed capacity demands through 2G, 3G and 4G transitions and remains on trajectory to continue in a 5G network. Reliability of wireless backhaul products has never been better, and costs continue to decline especially relative to fiber-based options. From a product point of view, many good and reliable options exist that cover all frequency bands and form factors to solve the problem of backhaul, small cell and other sub-applications. Continue reading
In late January and into February 2016, a big tumult ensued when Sprint announced that it would begin to move its mobile backhaul strategy from one based on leased fiber to another based on owned microwave radio. The story first ran in technology news site Re/code and quickly got reposted with additional commentary by FierceWireless, Wireless Week and others, and which was reiterated this week in RCR Wireless.
While the breathtaking headlines about reducing costs by $1 billion caught most people’s attention—primarily through reducing tower leasing costs and not using competitors’ networks—lower down in the copy came a potent reminder from Sprint about the economic benefits of microwave radio. It also highlighted the fact that backhaul has entered a transitional period (see article end for more on that).
Most of that $1 billion that Sprint seeks to save comes by way of moving away from AT&T and Verizon fiber backhaul networks. You might think that Sprint would build its own fiber network instead. But that would take too long and still have an exorbitant price tag associated with it. It’s a function of both out-of-pocket capital costs and embedded lost opportunity costs. Bottom line: laying fiber connections is expensive and slow. Putting up a network of high-speed, broadband microwave relay towers is quicker and easier. Continue reading