Why Pre- and Post-Deployment
Wireless Surveys Are Essential
for Your Business

So your super expensive brand new Wi-Fi infrastructure is all set, and you are hoping for all your office issues to dissipate into thin air. But wait, what are these blaring concerns creating a ruckus in the office? Employees are struggling with dead zones in the conference room, the warehouse has no connectivity, VoIP calls keep dropping, and there is insufficient bandwidth plus device overload. No, your elaborate Wi-Fi infrastructure is not the culprit. You skipped a step. This is where pre and post-deployment wireless surveys come into the picture, or rather complete the picture. Let us first understand the problem in detail.

The Problem: Deploying Blindly

Many organisations fail to understand the dynamics of wireless deployment. Without even understanding the problem, they try to copy and paste the generic solution - install access points (APs) at regular intervals. Unfortunately, radio frequency (RF) signals don’t follow simple floor plans. RF signals are impacted by physical distance, environmental obstacles and electromagnetic interference (EMI). Let us understand how this loophole affects your business.

Without a proper pre and post-deployment analysis, businesses face:

  • Coverage gaps and dead zones: Signal propagation through physical material such as concrete walls, machinery, metal, and glass needs to be strategically mapped, as these tend to absorb or reflect RF signals, leading to weak spots and dead zones.
  • Interference from neighbouring networks:There are various external sources of RF interference such as neighbouring networks, Bluetooth devices, metallic barriers, motion detectors, microwaves, etc. Pre-deployment interference mitigation is required to identify and neutralise these RF disruptions.
  • Over- or under-provisioning of access points:Without pre-deployment analysis, you might tend to allocate more wireless Access points (APs) or more bandwidth than required. This can lead to issues like higher hardware procurement costs, Co-Channel Interference (CCI) or unnecessary maintenance. Similarly, under-provisioning of APs can lead to compromised productivity and inability to support high-bandwidth applications.
  • Poor capacity planning:Pre-deployment analysis leads you to the resources that you need, and post-deployment analysis helps validate those resources. Without these two steps you are not only risking wasted hardware spend, application crashes, unmet objectives and team frustration but also inviting unforeseen bottlenecks and a no-feedback loop.

The consequences are real: reduced employee productivity, frustrated customers, failed IoT and operational systems, and costly post-deployment rework. As enterprise wireless environments grow more complex with Wi-Fi 6E, IoT devices, 802.1X authentication with backend RADIUS servers, cloud-based Wireless Controllers and Network as a Service ( NaaS), even mild errors can complicate the operations beyond repair.

The Solution: Pre- and Post-Deployment Wireless Surveys

A wireless site survey is a systematic process of assessing and analysing the RF environment to determine the best placement and configuration of access points. It should be conducted at two critical stages:

1. Pre-Deployment (Predictive) Survey: This on-site assessment is conducted before installing a permanent network infrastructure. During this survey, temporary battery-powered access points are placed on tripods at planned locations to verify the predictive coverage model.

With the help of predictive modelling, a blueprint is prepared, and AP-on-a-Stick(APoS) is followed. Technicians temporarily mount APs at exact locations and heights to test the model. Then engineers map live signal attenuation and coverage limits with the help of professional survey tools. The collected real-world data is used to refine the design. This process identifies coverage gaps, interference sources, and capacity constraints before a single cable is run.

2. Post-Deployment (Validation) Survey Once access points are installed and configured, the post-deployment survey is conducted to validate the effectiveness of the live network. Post-deployment validation is done through data collection. Passive surveys are also conducted to measure background noise, signal strength and channel interference. Active surveys are also done to test actual throughput, packet loss and roaming behaviour. This step helps evaluate critical metrics such as Signal-to-Noise Ratio, Co-Channel interference and Received Signal Strength Indicator. It also helps identify physical obstructions that are altering RF propagation and interfering electronic devices. When strategically planned and well-conducted pre- and post-deployment surveys go hand in hand, it results in seamless transitioning from planning to validation and business operations face fewer obstacles and fewer support calls.

The Results: What a Surveyed Network Delivers

Businesses that invest in structured wireless surveys consistently report better outcomes:

1. Cost efficiency: A pre-deployment survey helps attain cost efficiency as you get a clear estimate of the exact number of APs required.

2. Adjusted hardware placement: Since a pre-deployment survey helps you identify the physical obstructions that may hamper the propagation of signals, you can identify the perfect mounting locations, enabling continuous signal propagation.

3. Capacity planning: Empowered with surveyed networks, you can identify data traffic patterns and estimate expected user density, which can help optimise capacity planning.

4. Actionable heatmaps: Post-deployment survey delivers visual heatmaps of Signal-to-Noise Ratio (SNR), signal strength and channel overlap. This diagnostic step is essential to measure signal strength and identify dead zones.

5. Fewer connectivity complaints: When interference sources can be proactively identified and eliminated, the IT team can spend less time firefighting and more on innovating.

6. Reduced IT overhead cost: A robust and well-tuned network that emerges as a result of pre and post-deployment surveys offers a reliable user experience. There is a significant reduction in helpdesk tickets, and operations run smoothly.

7. Lower long-term costs: Regular post-deployment troubleshooting and reworks pose a severe long-term cost for the company. With a post-deployment survey, potential interference can be identified and dealt with during the initial phase itself, resulting in lower long-term cost.

8. Future scalability: With quantifiable insights into the site's RF profile, businesses can be prepared for changes and scale the network to accommodate future growth and emerging technologies.

The Bottom Line

A wireless site survey is not a skippable step. It’s not a decision to be made; rather, it is a must to build a robust backbone for the company’s short-term as well as long-term operational goals.

Whether you're setting up a new office, expanding to multiple locations, or upgrading to embrace new technologies, pre and post-deployment wireless surveys will hold you in good standing and drive your ambitious journey towards success.

At MM9, our Integrated Networking Solutions practice includes comprehensive pre and post-deployment wireless assessments, helping businesses across India build networks that perform from day one - and continue to perform as they grow.

Ready to get your wireless network right the first time? Talk to our team.

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