Tactical System Connects Units

December 2008
By Henry S. Kenyon

The U.S. Marine Corps is providing the wireless point-to-point link (WPPL) system to its deployed forces. WPPL features secure point-to-point line-of-sight or non-line-of-sight transmissions for voice, data and video communications.
Mobile transmission equipment provides forces with increased bandwidth, connectivity.

The U.S. Marine Corps is issuing a new tactical communications system to deployed and expeditionary forces. This equipment provides forward positions such as operating bases, checkpoints and command posts with reliable, high-bandwidth connectivity to receive and send video, voice and data transmissions. This new tool is being used to link widely dispersed units across Iraq.

Units involved in counterinsurgency and humanitarian missions often are scattered across wide areas with little support. Modern sensor and communications technologies have greatly improved the situational awareness and effectiveness of U.S. warfighters conducting such missions. However, these devices all consume bandwidth, which is in especially short supply at the tactical level. The ability to maintain connectivity and to receive live video and data streams greatly increases a small unit’s effectiveness.

The wireless point-to-point link (WPPL) system provides the secure point-to-point line-of-sight or non-line-of-sight transmission of voice, data and video communications. The Marine Corps has developed WPPL, built by TeleCommunication Systems Incorporated (TCS), Annapolis, Maryland, to extend communications to the “last critical mile”—units based in forward positions, explains Maj. William Cornell, USMC, WPPL engineer support officer, Camp Pendleton, California. WPPL first entered service a little more than two years ago and has been continuously improved since then. The latest WPPL version built by TCS is known as WPPL-D, and it has been in service for roughly 10 months, he says.

Besides providing voice, video and data communications, WPPL can channel classified and unclassified networks, voice over Internet protocol and defense switched network (DSN) services. WPPL consists of commercial components integrated into a military-grade system. The major describes the system as more hardware-based than software-based, although some components are    software-driven.

WPPL was developed to meet Marine Corps requirements for a small, lightweight, easily transportable communications system capable of providing on-the-pause data communications to remote sites. Maj. Cornell explains that this was a pressing need because the Marine Corps’ existing terrestrial systems were large, unwieldy and strictly line-of-sight. He adds that there was a need for a deployable system with a small footprint that could pass data in non-line-of-sight conditions.

The core WPPL equipment consists of Redline and Harris radios, and adjustable 35-foot masts for line-of-sight Internet protocol transmissions. Each system breaks down into six transit cases that can be carried by two soldiers and transported by a single high-mobility multipurpose wheeled vehicle (HMMWV). Maj. Cornell states that a fully assembled WPPL system weighs about 850 pounds. The six-case package includes all of the operational equipment and spares. Trained personnel can assemble a WPPL system in 30 minutes, he says.

WPPL uses standard network interfaces. This allows any number of devices capable of converting analog voice data from a single-channel radio to hook up and convert to Internet protocol. Maj. Cornell notes that WPPL itself does not have the devices and software to make this transition, but these systems can be integrated easily into WPPL. WPPL features interfaces for laptop computers, Cisco voice over IP telephones and devices using RJ45 interfaces.

Although it has operated at the platoon level, WPPL-D originally was intended to support forces at the battalion level. The original concept for deploying the system was to provide communications from a regiment down to a battalion command post. However, the major notes that once the system was deployed, Marines began to extend services from battalion command posts down to company headquarters.

Unlike legacy terrestrial point-to-point communications systems, WPPL will be easy to transport and deploy. The system breaks down into six manportable shipping cases and can be assembled within 30 minutes.
Since its initial deployment, WPPL has become well-regarded by Marine forces. Maj. Cornell explains that operational forces like the system’s small size, light weight and ease of use. He explains that Marines can be trained to use WPPL in four days, further enhancing its functionality. “With a minimal amount of training, they can take the system into the tactical environment and install, maintain and operate it with very few problems,” he says.

Another reason WPPL is popular is its reliability, Maj. Cornell admits. Once WPPL has been installed and data is transmitted over the link, the system is very resistant to breakdowns. “It  doesn’t require a lot of care and feeding once that link is in,” he says. The major notes that this ease of use is a major contrast to the service’s legacy terrestrial systems, which require high levels of support and teams of skilled operators to maintain communications links. Although they have been upgraded, the major explains that many legacy terrestrial systems are based on technology that is more than 20 years old. He adds that the Marine Corps is moving to modernize its terrestrial systems, but it has not yet deployed any new technologies.

WPPL’s beyond-line-of-sight capability is important in Iraq, where Marine units are based in small forward posts in urban areas. It is not possible to install repeaters for line-of-sight communications on top of civilian houses or other structures that may break the link. Establishing terrestrial links between camps in Iraq was challenging because these small bases have limited space for equipment. “A lot of the times in Iraq, you have to shoot through some kind of obstacle, a water tower or buildings. WPPL is nice because you can close those links even with obstacles in the way,” he says.

Although the system can run important battlefield applications such as live streaming video, Maj. Cornell cautions that a number of factors determine the data rate of a WPPL link. These factors include the distance between antennas, how high the antennas are and if there are any obstacles. If two systems are within 10 to 15 miles of each other, the link will be in the area of 54 megabits per second. “Fifty-four megabits per second is more than enough to support streaming video feeds and many data bandwidth-intense applications. As you get past 15 miles and move out to 20 or 25 miles, the data rate begins to drop,” the major maintains.

Maj. Cornell shares that some WPPL links in Iraq are roughly 30 to 35 miles apart. These long-distance links carry roughly 16 megabits per second. He adds that this rate is  effective for pushing video feeds.

WPPL is in the middle of its fielding phase with the new WPPL-D systems being delivered to operating forces. Because of the delivery process, no new development road maps are currently in place as the program is focused on deploying the current inventory. However, once this deployment is complete, the major says the Marine Corps will examine future development possibilities.

The Marine Corps also has decided to make WPPL a program of record, which means that it will become a permanent part of the service’s inventory with its own budget and funding. “That doesn’t mean that it won’t transform and evolve into something different. But the technology—the capability—we’re going to keep around for years to come,” Maj. Cornell says.

Some 236 WPPL systems have been acquired in several orders. The first WPPL purchase was for 30 systems for all Marine Expeditionary units. A second purchase designated 50 systems for Marine forces operating in Iraq’s Anbar province. The final purchase was for 156 WPPL systems to support the ground-based observation surveillance system (GBOSS) program. GBOSS is a monitoring system consisting of electro-optical and infrared cameras mounted on towers. These surveillance systems monitor roads and other areas to detect insurgents planting improvised explosive devices and other activities. WPPL is providing the backhaul support for the video streams for these cameras to transmit data back to forward operating bases.

Web Resources
U.S. Marine Corps: www.usmc.mil
TeleCommunication Systems Incorporated: www.telecomsys.com


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