In what surely is a glaring understatement, Tanya Jones, manager of Sprint Corp.’s vital Emergency Response Team Operations, observed, “We learned quite a bit from Hurricane Sandy.”
Indeed, Sprint, like all telecommunications carriers, lost cell sites on the northeastern seaboard and in New York City in the 2012 superstorm, which hurt its cellular operations. Fortunately, Sprint’s ERT was able to provide critical communications services to various first responders and emergency agencies using vehicles such as COWS (Cell On Wheels) and COLTS (Cell on Light Trucks), including those near the World Trade Center in New York, where the vehicles were parked right in front of the Freedom Tower, after police blocked it off for the Sprint workers.
Among the key learnings from the debacle, said Jones: How better to rebuild; where better to stage; how better to “future-proof our technology to ensure our equipment is upgraded and our personnel equipped” for disaster.
Her team of disaster emergency workers in multiple U.S. locations, including Dallas and Sterling, Va., is at the center — and on the front lines — of Sprint’s emerging approach to climate resilience. Having overseen the company’s disaster response for 10 years and found herself on the spot during 2,500 events — from hurricanes to fires to tornados to floods — her interpretation of such events is telling:
“While a disaster is a disaster, I subscribe to the theory that the climate is changing weather patterns. You see more forest fires in the west and more hurricanes; you see increased water and air temperatures and storm activities; and there’s been an uptick in severity of storms,” Jones said.
A communications approach to resilience
Jones’ thoughts on disaster and climate echo the observation of Sprint's director of corporate responsibility and sustainability, Amy Hargroves, who heads the company’s approach to climate resilience: “The same risks exist for climate-related events as for other disasters, but there’s a greater range of events and more of them.”
Of acute importance, Hargroves noted: “In our field, as a communications company, disaster resilience has to be core to our business, because there’s so much dependence nationally on communications.”
Indeed, while now majority owned by Japanese parent Softbank, Sprint’s network is United States-centric, serving federal, state and local governments as well as emergency responders — and, of course, the company’s 50 million-plus business and individual customers.
Because emergency response is at the core of Sprint’s resilience approach, the company is always at the cutting edge of communications technology: “LTE, high-speed data, 4G, emergency response — we can provide that now, but most of what we do is make sure we’re on top of technology, because it’s not if but when a disaster will happen,” Jones explained.
Keeping its emergency response team up to date with special equipment and mobile communications — as well as learning from each disaster — is only one part of Sprint’s four-pronged approach to implementing climate resilience, a business priority of Hargroves’ sustainability team, which has won the company a number of accolades, including the recent Compass Intelligence Eco-Focus and EPA Climate Leadership awards.
Other priorities in Sprint’s resilience approach include:
• Frequent assessments of the company’s network risks.
• Improving backup power with less carbon-intensive sources, including research on hydrogen-fuel cells, in part with the Department of Energy.
• Reviewing lessons learned to find new business opportunities, including those related to customer offerings.
Overarching goals include reducing the company’s greenhouse gas emissions and electricity use by 20 percent by 2017 from 10 years earlier and ensuring 90 percent of its supply chain meets Sprint’s environmental and social criteria. The goals are complementary, particularly given Sprint’s massive network overhaul, at a cost of nearly $5 billion over three years, now coming to an end.
That renewal has allowed Sprint to achieve its 2017 GHG reduction goal and come within 1 percent of its electricity reduction goal. Sprint provided free guidance on greenhouse gas measurement, reporting and reduction strategies to its top suppliers, including those involved in the network overhaul.
Network risks: cell sites, signaling, fleets, response prioritization
To ensure the network stays up to date — and up and running — in case of disaster, the company runs quarterly risk assessments. And Sprint expects more extreme events.
On planning for potential climate risks, Hargraves noted that since Sandy, “it’s not so much that we’ve done anything new, but that there’s increased risk recognized through insurance [coverage] and assessment. That’s how we adjust and plan.”
Fleets: Network risks also include the company’s fleet of vehicles for a range of conditions that could affect the cell sites, the most vulnerable part of the network. Fortunately, Hargroves noted, insurance companies have been building climate risk into their corporate risk models, assessing the level and nature of risk per site. With that information, Sprint can determine which sites may be most vulnerable and potential candidates for relocation. “We look at 500-year flood levels when we build our sites,” she said.
Cell sites: With some 55,000 cell sites across the country, Sprint has a lot to keep track of. The signal from the site must be accessible in order for wireless customers to complete calls. Cell site traffic is aggregated at over 100 major satellite switching sites that allow calls to be terminated between various wireless and wire-line networks. Much of the IP-based (Internet Protocol) control functionality is handled by some 30 Core sites that act as traffic directors for voice and data services.
“Networks are complicated beasts, and risk varies according to the site,” said Hargroves. “But the most important parts to protect are the switch sites, mainly because they aggregate traffic from thousands of cell sites. A single switch outage can isolate a complete market, leaving customers without critical wireless services over a large geographical area.”
Emergency response: Of rising importance to the company’s resilience plan, said Hargroves, is the sort of emergency response to disasters that Jones manages. “We anticipate greater demand for the services of our Emergency Response Team because of the increase in the number of disruptive events,” Hargroves said.
Essential to the response is the specialized mobile equipment, such as mobile communications centers, including COWs and COLTs. These are whole vans or trailers especially useful in places that are hard to access. “Demand for COWs and COLTs has increased over the past several years, so our fleet has been [growing] and is expected to continue to grow in response,” she explained.
A big part of emergency response is sequencing and prioritization: That entails determining who is “in charge” of disaster management (from a government perspective), which communications capabilities are intact and which are needed — and then developing a prioritized list of communications services and infrastructure that the company will provide.
Sprint may send out its ERT to work with government and provide critical communications services initially for the first responders — government personnel, military, FEMA, Red Cross — to enable them to communicate, especially if a lot of infrastructure, such as cell site towers, signal repeaters or switching centers, has been disabled. The Sprint ERT always works with local government, including sheriffs and firefighters. Next in line are customers.
Risk, site planning and backup power: response to storms, fires, flooding
While Sprint always has had backup power initiatives, those have expanded throughout the United States over the past few years — as has the need for backup, which has risen, along with the frequency of disasters.
“Provision of backup power is very much motivated by both natural and manmade disasters,” said John Holmes, who, as Sprint’s manager of network planning, is responsible for the company’s strategic planning efforts involving backup power, energy efficiency and sustainability for the company’s network.
The need for backup power varies by region. “In the eastern and southern coastal regions, hurricanes and tropical storms can cause widespread damage,” he said. “In the Midwest and upper Midwest, ice storms can result in widespread outages.
“Wildfires can be a problem anywhere there’s a combination of very dry weather and a lot of combustible ground or tree cover. As a general rule, they are more frequent out west. Places like California or the Pacific Northwest are susceptible to earthquakes.
“Also, don’t count out tornadoes. Heavy rainfall can result in flooding, and many times that will occur downstream of where the majority of the rainfall occurred."
Sometimes the power stays on, but Sprint “can still have widespread outages, if, say, a major backbone fiber carrying multiple backhaul circuits (which connect the BTS equipment to the switches) is cut,” Holmes pointed out. “That would prevent calls from being completed … and is often manifested to the wireless subscriber as a fast busy signal.”
What’s more, Hargroves added, the question of where to build cell sites has been complicated in recent years by the increase in frequency and severity of storms, as well as the availability of energy and water sources.
“A few years ago, we studied the impact of climate change on water scarcity and cost in the U.S. The results were shared with the C-suite and operational teams so they could use it as input for site planning. For instance, if you need a big building, you should expect it to have a water chilling system, which is a big driver of water use. If you know where water will be scarcer, and thus more expensive, you should avoid building in those areas,” Hargroves explained.
In 2013, water cost the company a mere $1.2 million, compared with $300 million for energy, “so it’s a far lower economic priority,” she said. “However, given the importance of water globally, it would be foolish not to consider drought forecasts in your site-planning process.”
By contrast, Sprint has a strong economic incentive to reduce its energy usage, which is primarily electric. The company has cut its internal electricity use by 22 percent since 2007 and reduced its electricity costs by $87 million annually. Including Clearwire, acquired — along with its emissions output — in 2013, Sprint’s electricity costs are still down by 19 percent.
Power backup and hydrogen fuel cells
When disaster strikes, electrical power from traditional sources is likely to go down, as recent climate-related events, including Superstorm Sandy, have shown. That’s why backup power is essential for telecommunications providers such as Sprint. A backup plan is needed for all critical components in the network. Because Sprint is committed to lowering carbon emissions, the company looks to cleaner backup power sources.
“Our second priority for carbon reduction is back-up power, which is a leading contributor to Sprint’s Scope 1, or direct, emissions,” said Hargroves. “Scope 1 emissions represent only 3.5 percent of our aggregate Scope 1 and 2 emissions. Within the 3.5 percent, 10 percent is emissions from back-up power sources, such as diesel fuel and propane.
“Sprint includes its Scope 1 emissions in its goal to absolutely reduce GHG emissions by 20 percent by 2017, and in fact, has reduced them by more than 41 percent so far. Increasing our use of hydrogen fuel cells and propane — and decreasing use of diesel generators — as backup power sources at cell sites has contributed to this success.”
Hargroves noted that Sprint’s fleet, with 1,000 vehicles, has a substantially smaller GHG footprint than the fleets of its direct competitors, which have 40,000 or more vehicles.
“When we talk about network resiliency, we mean the ability of the network to maintain power and functionality, particularly at the switching and cell site level,” she said. “There are multiple lines of defense, the first of which is batteries. Since we have the greatest dependency on batteries, much of our focus is on reducing the environmental impact and duration of use of our network batteries. We have partnered with the National Renewable Energy Lab and the Department of Energy on battery technology, which is so critical for a communications company.”
The second line of defense is using both a diesel generator and natural gas feeds, even propane and methanol, to access multiple core electricity streams in a single place to provide backup power. While solar and wind power are sparsely used where possible, neither technology is practical, given risks (when wind is strong, a disaster could be in the making), lack of continuous availability of energy and cost-benefit balance.
Sprint is maximizing its use of hydrogen fuel cells in part through work with the DOE, whose $7.3 million grant in 2009 has supported the company’s development and deployment of 260 additional fuel cells to support its backup power systems, network planning manager Holmes said.
The innovative fuel cells use an on-site, refillable, medium-pressure hydrogen storage system, which has eliminated bottle swaps, required in earlier generations of the technology, while boosting the standby runtime of the cells to parity with that of other backup solutions such as diesel generators. The company’s 500-plus hydrogen fuel cells help Sprint ensure that its Scope 1 emissions related to back-up power stay low despite significant increases in network resilience, achieved via more sites with longer back-up power.
Customers and business opportunity
Perhaps the biggest business opportunity in climate resilience for the company is on the consumer side of the business, said Hargroves. “We’re trying to identify additional services we can provide to help customers” understand and prepare for potentially disruptive events.
So far, most of the company’s focus has been on the “survivability of network infrastructure,” Hargroves said. The company’s Japanese parent Softbank has exceptional experience in this arena, gained during the Great East Japan earthquake of March 2011.
Explained Hargroves: “Up to now, the main things we’ve done involve the survivability of our services, directly helping first responders, supporting customers on billing, and managing our service, versus providing information that can help them manage through the disaster — things like how to extend the life of your phone battery and recharge with limited electricity sources available, which is different from relaying information during a disaster, as people become more and more dependent on cell service.”
But the company imagines the opportunity to change that. Sprint may have a competitive advantage in consumer engagement, if it can leverage some other assets of Softbank such as Yahoo (in Japan) and provide disaster-related content on its customers’ phones.
She added: “We do think there are some interesting opportunities with emergency alert systems and disaster content support. So if someone can figure out a good way to do it, this is a terrific opportunity.”
Top image of Sprint store in New York City by Northfoto via Shutterstock