Maintaining 24/7 parking lot security
Many hospitals today currently have large parking garage complexes containing multiple levels of parking supported and protected by an extensive parking gate entry system and surveillance system; however, deploying these types of solutions in remote and outdoor parking lots can be a challenge.
Unlike a retail environment, which has a set open and close time and a parking lot that empties out in the evening hours, parking lots at hospitals are typically full around the clock. Not only are employees walking to these parking lots at all hours of the day and night, meaning that their safety needs to be protected, but it is also important to monitor parking lots and their surrounding areas to deter against vehicle vandalism and theft.
It’s fair to say that over the past 10 years, many hospitals have made a significant investment to improve the security within and around the perimeter of their facilities. For health care facilities, protecting patients, staff and visitors has become increasingly important in addressing patient privacy, safeguarding against infant abductions and ensuring an overall safe environment. Tighter rules and regulations require health care facilities to keep under lock and key and provide an audit trail of those with access to prescription medication.
The desire to provide better security and safety at health care facilities also extends to areas outside of the walls, sidewalks and outdoor gardens that are part of these campuses to include the parking areas used every day by employees and visitors.
In remote lots, the lack of a power source or access to fiber can make it very difficult to deploy a video surveillance system that can be actively and continuously monitored. As many large hospitals already operate their own command centers to monitor their security, it’s important to integrate video surveillance of the parking lot into the hospital’s existing security system.
In some instances, the remote parking lot can be located half a mile away from the main campus, according to Craig Lerman, president and CEO of LTW, a systems integrator in Pine Brook, New Jersey — which can make this type of project more challenging.
“Putting fiber up to the parking lot from the hospital can be expensive and it can take a long period of time to get it there, especially if you need to get a right of way approval across multiple properties,” says Lerman. “We routinely deploy wireless solutions to overcome those obstacles.”
Wireless Parking Lot Surveillance Options
If fiber is not an option, due to unavailability, cost, time or disruption to deploy, it’s important to consider a few points before implementing a wireless system.
First, review your current and future bandwidth consumption needs to ensure you implement a system that can handle multiple video sources without impairing the video quality while maintaining low latency. This capacity analysis needs to address future bandwidth requirements as technologies such as 4K hit the video camera market and become commonly deployed.
Second, account for all data traffic requirements of the link. In addition to video, the same wireless link may also carry voice and data. Therefore, quality of service (QOS) must be factored into the design process.
Millimeter (mmWave) wireless, a next-gen, gigabit fiber-like technology, uses spectrum that is located at much higher frequencies than traditional wireless consumer products and can provide reliable connectivity and enough available bandwidth to accommodate multiple HD cameras and even 4K cameras on a wireless video surveillance network.
If you’re mounting cameras to existing light poles, check to make sure that there is continuous power at the pole. When continuous power isn’t available, a continuous power bridge (CPB) is another option to consider. One benefit of using the Power over Ethernet (PoE) power sourcing capabilities of mmWave radios: some systems can also provide power to a camera, which can reduce installation time and the number of power supplies required.
Surveillance Network Deployment Options
Wireless networks that use mmWave radios to transmit data are much simpler to design and pre-installation preparation is minimized because no spectrum analysis is typically required — the only requirement is to ensure that there is direct line of site and calculate the distance of transmission. mmWave’s transmission beam width is very narrow, and its high frequency short-range propagation characteristics greatly reduce the possibility of interference in the environment due to other RF systems.
“You have to consider many factors when installing a wireless networked surveillance system, so it’s important to do a comprehensive site survey and use the path propagation tools provided or specified by the vendor,” says Lerman. “The up-front engineering has to be correct and wireless radio links have to be mounted correctly to a very rigid pole to ensure reliability.”
In addition, it’s important to ensure the network will not get jammed due to heavy Wi-Fi traffic or malicious intent. The narrow beam technology and frequencies associated with mmWave radios means they are extremely robust, dramatically reducing the already small risk associated with typical wireless systems.
“The surveillance system for a hospital parking lot may incorporate a variety of different security cameras, such as high-resolution cameras that can identify a license plate or to clearly identify facial features of an individual,” according to Rick Adams, director of security solutions for LTW.
“Hospitals will install cameras on the roof for general surveillance purposes to see the street and a parking area, but will also install cameras closer to the ground to capture better details,” said Adams.
Regardless of which type of wireless security system you implement, Adams advises users to make sure the wireless system can provide reliable connectivity and enough available bandwidth to accommodate future growth as customers are always looking to upgrade both the number of cameras and the resolution of their cameras to include 4K and beyond.
This article appeared in the Spring 2018 edition of SIA Technology Insights.