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Is Bluetooth Interfering with my Wi-Fi?

Do you use Bluetooth and Wi-Fi at the same time? Whether you’re at work, home – Or working from home! – you might find that you’re connected to both Wi-Fi and Bluetooth via various devices. 

And if this is the case, it’s probably common for these connections to fight with each other and cause you to run into connectivity issues. Why, we hear you ask? Surely they are completely different from each other? Actually, they’re not. They have a lot more similarities that you might have thought. 

There are instances where Wi-Fi and Bluetooth can use the same radio frequency range for data transfer, meaning that Bluetooth could interfere with your Wi-Fi. 

If you’re experiencing wobbly Wi-Fi or a Bluetooth connection that keeps dropping out then we feel your pain – There is nothing more frustrating. Not only that, but it isn’t very productive, is it? If you’re having to continually reconnect your Bluetooth device to make it work then you could indeed be struggling with interference between that connection and the Wi-Fi. 

Why can Bluetooth interfere with my Wi-Fi?

When it comes to understanding how Bluetooth and Wi-Fi can transmit data and interact with each other, you need to know a bit about frequency bands. 

Telecommunication and other applications depend on a series of electromagnetic frequencies in the Radio Spectrum. Each range of frequencies, or bands, are used for specific purposes. Some of the main frequency bands that you may have heard of are:

  • Marine Band which is used for ships communicating outside of the range of the shore. 
  • Citizen’s Band which is public radio frequency, known as CB and most commonly used by truckers. 
  • Broadcasting Band like AM and FM, multiple bands that are used to broadbcast radio signals 

So which do Bluetooth and Wi-Fi come under? Well, they are on Industrial Scientific Medical bands, or ISM. The home of radio telecommunications. One of these, which you will likely have heard of, is the 2.4GHz frequency band and is commonly used for network connectivity.  

This spectrum is occupied by both Bluetooth and Wi-Fi 2.4GHz, which means that things on this band can get a bit over-crowded and thus cause electromagnetic interference. How do you know when this happens? Well, you might notice some of the following things on your connected devices:

  • Audio connections via Bluetooth cutting in and out
  • Pages that are slow to load, or don’t load at all
  • Your device telling you that there is an issue on your network

A connection as unreliable as this causes nothing but frustration – What you need is for your device to be able to communicate properly with the network. Unfortunately, these problems can be common when a frequency band is over-crowded and causing interference between devices and networks.

This is why we use ISM bands for telecommunication – The traditional radio frequencies were too populated. What you might not know, however, is that ISM bands were originally to transfer heat, not data! Hence why your microwave can cause interference issues with your Wi-Fi and Bluetooth. They use the same technology, but radio waves at a different frequency. That’s why you are always told to not put your router or devices anywhere near your microwave! In fact, any device that gives off electromagnetic frequency could cause interference with your home network and lead to Wi-Fi issues. 

If you’re struggling with slow signal strength, an unreliable signal that cuts in and out, Bluetooth audio problems or a lag between Bluetooth devices (e.g. keyboards or mouse) then you could be experiencing interference issues. 

But is there anything you can do about the interference between Bluetooth and Wi-Fi?

Ways to Reduce Interference Between Bluetooth and Wi-Fi

If you think that your Wi-Fi or Bluetooth problems are down to interference then you’ll be pleased to know that there are a few straightforward things you can do to try and resolve the issues. One simple tweak could make a big difference! 

  1. Try connecting to a Lower Traffic Router Network

    If you have a modern router, then it should have the option to operate on different channels, for example 2.4GHx and 5GHz. If you have this option, then try changing the channel on the router that you’re connected to. This should hopefully help to relieve any network congestion.

    There’s unfortunately not an awful lot you can do if the interference is coming from outside your home, which is more common in densely populated areas like blocks of flats. You can see how dense your area is by looking at how many networks there are in the list when you try to connect.

    Thankfully, as we said above, modern routers are trying to combat this problem by having the option to use a higher frequency band. Dual band routers are particularly useful for this.
  2. Keep up-to-date with software updates

    Modern devices compatible with Bluetooth will mostly have the ability to hop along the channels in the 2.4GHz bands, known as frequency hopping. This helps to alleviate any issues caused by interference. In order for your Bluetooth device to be able to do this, you need to make sure you have stayed up to date with software updates.


On the 2.4Ghz band, some routers can transmit on multiple channels. Couple this with the ability for newer Bluetooth devices to frequency hop and you’re unlikely to struggle with interference between Bluetooth and Wi-Fi. Any interference issues could then be down to physical barriers rather than frequency interference.

  1. Can you remove any physical barriers?

    You may or may not be aware that different materials can affect your signal differently; some will completely block it. If you have lots of glass, concrete, brick or walls in general then this can cause the signal to get weaker, thus affecting your connectivity. Keep this in mind when you place your router somewhere – Behind a concrete wall or in a solid wooden cabinet are not ideal places! You’ll be surprised where our Wi-Fi experts have found routers…

    If you are using the 5GHz frequency band, then you need to be as close to your router as possible, with little physical barriers. Operating on a higher frequency means you are more susceptible to material interference.
  2. Can you get closer to the router?

    If certain materials are weakening your connection and you can’t easily remove that barriers, perhaps you can move either your router so it’s better located, or you and your device so you are closer to the router.
  3. Forget all your networks

    If the above solutions haven’t worked, then you might need to try forgetting all your networks on all your Wi-Fi and Bluetooth devices, unpair everything and then re-connect and re-pair. Yes, it’s a bit of a faff, but it can help remove old connections that are no longer needed that are crowding the network and causing interference problems. 

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Still having problems? Call the Experts

If you’ve tried the above ideas and you’re still struggling with an unreliable connection, dodgy audio and/or slow internet then it could be time to call in the experts and get the fault diagnosed. 

Our Wi-Fi experts work out of Hampshire, London and Cardiff and can help solve your Wi-Fi woes and get you a more reliable connection. You can contact us here. You don’t have to put up with rubbish Wi-Fi! 

You can also read more about Wi-Fi interference on our previous blogs.  

by admin
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Wi-Fi Site Surveys – Validate Your Wi-Fi Design

You could have the most expertly designed Wi-Fi network, but without a Wi-Fi Site Survey, how will you know it will actually work as intended?

When it comes to designing and installing a wireless network, the most important thing is that it meets the demands of your users. 

The great thing about a Wi-Fi Site Survey is that can test your wireless network when it’s in the design stages and predict whether it will work or not, as well as within an already deployed network that needs some changes or additions made. 

Driving your Wi-Fi network design choices and deployment with data removes the risk of your wireless network failing to meet the needs of your enterprise. 

Gone are the days where a surveyor is laden down with computer setups, trudging around like a donkey. Nowadays it’s all the latest tech and we can carry out a Wi-Fi Site Survey with just the phone in our pocket. 

Validating your Wi-Fi network has never been more straightforward. Good news if you’re about to be designing your Wi-Fi network! Not only that, but it also makes it easier and quicker for businesses to be able to survey their Wi-Fi on a regular basis, ensuring that they continue to operate reliably. This is particularly important for anything that is business critical. 

 

What is a Wi-Fi Site Survey?

Well first things first – You might be wondering what actually is a Wi-Fi Site Survey? The purpose of a site survey is to visit the network premises and capture Wi-Fi signal and spectrum data. It also allows you to investigate the best places to mount access points and identify accessibility for necessary cabling. 

Getting a Wi-Fi site survey can test out a predictive Wi-Fi design before you deploy it on the network as well as check that any changes or additions to an existing network will work effectively. 

Why would I need a Wi-Fi Site Survey?

There are a few different scenarios where we would recommend a Wi-Fi Site Survey. 

  • Wi-Fi Design Site Survey – This survey is carried out on site before you’ve started to design your wireless network. Performing a Site Survey at this point allows you to create a predictive Wi-Fi network using data captured on the survey, including RF conditions, neighbouring networks, available/ congested channels, interference and accessibility for mounting AP’s.

     

  • Pre-Deployment Site Survey – Once you’ve designed your Wi-Fi network, you can use a Wi-Fi Site Survey to test your design and simulate the performance of antenna and access points. This data is acquired by placing an AP in the relevant location(s) and then analysing the Wi-Fi, making sure that the network would function as predicted in the design.

     

  • Post-Deployment Wi-Fi Site Survey – The role of this Wi-Fi Site Survey is to identify whether a deployed network is working as intended. That means meeting performance expectations laid out in the predictive stage of the wireless design.

     

  • Health Check Wi-Fi Site Survey – The best networks carry out regular ‘health checks’ to make sure everything is functioning as it should. This means that any changes you need to make to your network are proactive rather than reactive. Why wait until your end users are experiencing Wi-Fi problems that could produce a costly Wi-Fi outage? A Wi-Fi Site Survey at this stage can help pick up any issues with interference, coverage and capacity, nipping any potential problems in the bud.

     

  • Troubleshooting Wi-Fi Site Survey – This is the Wi-Fi Site Survey you would carry out if you were already experiencing problems. A more reactive survey in which you can identify the underlying cause of the problems your end users are reporting. You can then go back to the design stages and re-deploy your wireless network for more effective working. 

Why is a Wi-Fi site survey important to validate your wireless network after the design stage? 

 

As we said above, by carrying out a Pre-Deployment Wi-Fi Site Survey, you can test the predictive Wi-Fi design before installing it. Validating your wireless design with a site survey gives you peace of mind that the network you are deploying will work effectively. Any potential niggles can be identified, and designs can be amended before you’ve started the deployment. 

 

No one wants to have run cables and installed AP’s only to find that they work much more effectively in a different location! It’s also very handy to find out any potential causes of interference so you can take steps to avoid them. 

 

You could think of a Wi-Fi Site Survey as a bit of an insurance policy. It’s the smart way to avoid mistakes and ineffective networks, not to mention time-consuming and costly re-design processes should a wireless deployment fail. 

 

A predictive Wi-Fi design is great, but it’s not final. It’s not ready until you’ve tested your design with a validating Wi-Fi site survey. 

 

So what things would a Wi-Fi Site Survey identify to validate your wireless design?

By completing a Wi-Fi Site Survey, you would find out the following:

  • Accurate floor plans – If you haven’t set foot on site, then you are placing an awful lot oftrust in your CAD floor plan being accurate. By actually being on site and carrying out a survey, you can make sure that the distances in the design are correct and walls, stairwells and lifts are all where you expect them to be. If your whole Wi-Fi design is based on a floor plan that’s out of date, your predictive design is unlikely to fare well in the real world.

     

  • Signal attenuation and wall types – Completing a predictive Wi-Fi design using your ‘best guess’ is not really going to cut it. It’s actually really important that you know where walls are and what they are made of. Getting on site for a survey means you can check wall attenuation (ie. how much signal you are losing through the walls). Checking this information enables you to make sure that the RF measurements in your design are correct and confirms that your Wi-Fi design will work (or allow you to make the necessary changes to your design to make sure it does).

     

  • Access point locations – There is nothing quite like a Site Survey for identifying where AP’s need to be located. Carrying out the Wi-Fi Site Survey lets you check your predictive plans in a live environment. For example, checking the locations are free of obstacles (like ducting) and modifying your design if needed. It’s so important that you use this stage to test your predictive wireless design and make any changes needed to optimise it further.

     

  • Neighbouring networks – A predictive Wi-Fi design can’t know how neighbouring networks and local RF noise would affect the network. A Wi-Fi Site Survey can pick up instances of interference, and allow you to make sure your network design has peak performances and avoids neighbouring interference. 

 

What do you need for an accurate Wi-Fi Site Survey?

The Wi-Fi Site Survey is your chance to see how your network design could come to life. Really, the testing is the fun part! The most important parts of a successful Wi-Fi Site Survey are:

  1. An accurate floor plan – Make sure the measurements are correct. It’s vital that you are scaling your floor plan if you want your design and validation to be precise. Even seemingly small mis-scaling can make your plan inaccurate by many metres. Not helpful at all!

     

  2. Utilise available tech – There are lots of tools out there to help you. Using an all-in-one diagnostic measurement device can help you make sure that your design and site survey are as accurate as possible, giving your wireless network a professional result. It also helps you to carry out your Wi-Fi Site Survey a lot faster.

     

  3. What channels are you scanning? – There’s no point scanning channels you don’t care about. It’s just a waste of time. If you have no 2.4GHz access points or radios, then you don’t need to bother scanning those channels. And the fewer channels you have to scan, the faster your site survey will be!

     

  4. Make sure your data is accurate – The aim of your Wi-Fi Site Survey is to capture data that is going to either validate or help you make changes to your wireless design. Therefore, it’s imperative that you are capturing data accurately. If whilst walking, your path looks like you’ve walked out a window or got stuck in a wall then you need to re-establish your location. Otherwise the data you are capturing won’t be accurate, or helpful!

     

  5. Measure attenuation on both sides of the wall – To identify how much signal is being lost to obstacles like walls, you need to measure the attenuation on both sides of that obstacle. By measuring on both sides of the wall, you make sure that you are capturing all the data you need.

     

  6. What survey method do you need for your environment? – There are a few different survey methods so make sure you are using the one that is going to give you the most reliable data.

    – Stop and Go – This is used in environments that are hazardous or particularly challenging. This one collects the least amount of data, but it’s important that you remain aware of your surroundings.

    – Continuous – Lots of clicks on this one! It’s the traditional means of collecting Wi-Fi Site Survey data, but requires lots of attention at all times. You must click when you start, turn, change pace and of course, when you stop!

    – Autopilot – This one is the Wi-Fi expert’s favourite. It’s quick and accurate. Using this one means you don’t have to manually click as you are walking through the site map. All you need to do for accurate results is make sure that the first calibration is accurate.

    – GPS – If you are working outdoors with no key reference points then this Wi-Fi Site Survey is a great option. All you’ll need is a GPS-enabled mobile device with a SIM card. 

Trust the Experts

If Wi-Fi Site Surveys have got your head in a spin, then why not leave it to the experts? Our trained Wi-Fi professionals here at Geekabit are experts when it comes to wireless site surveys. 

Operating out of Hampshire, London and Cardiff, our Wi-Fi experts are on hand to assist with all stages of Wi-Fi deployment – From the initial design and Pre- and Post-Deployment Site Surveys to Health Checks and full installations. 

Get in touch with our friendly team today and we’ll be more than happy to help. Or head to our website to find out more about the Wi-Fi Site Surveys Geekabit have to offer. 

 

by admin
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How to Give Your Wi-Fi Network a Health Check

You might think that once you’ve got your Wi-Fi network all set up and running, then that’s it done. But it’s not! Having a reliable wireless network involves ongoing maintenance and health checks to make sure that it’s performing at its optimum level.

There are plenty of variables in a wireless network that could change. Things like user demand or changes in the radio frequency that could have an impact. Seemingly simple things like rearranging your office furniture, onboarding new employees or using more applications requiring bigger bandwidth can all be negative factors affecting your Wi-Fi network.

Ongoing, regular surveys can help you catch these changes before they start to cause you too many problems.

So what do you need to do to keep your wireless networking functioning effectively?

 

Monitor New Client Devices

Just as when you are in the design and planning stages, it’s vital to know the number of users that are connected at any one time, and what devices they are connecting to the network with. Your network performance depends on this!

This could likely change with company growth or if your business has seasonal staff where connections peak and trough.

It’s also worth bearing in mind how old the devices are. Older laptops, for example, won’t work so well with today’s modern networks. And vice versa!

You can counteract this by semi-regularly updating your devices to align with your network.

Likewise, if your network was originally deployed a while ago, without being monitored or updated it will fail to work with modern devices to their potential.

You need to also monitor the applications being used and ensure that the bandwidth matches the demand. Organisations like schools that now have a plethora of laptops connecting wirelessly to the school network need to have strong, reliable Wi-Fi. Hospitals also have high bandwidth demand with the ‘workstations on wheels’ that are now prevalent.

The more end users you add to your network, the more bandwidth you will need.

In simple terms – Make sure you are monitoring new client devices. Make it your business to keep track of how many devices are connecting to your network and make sure you can meet the Wi-Fi demand consistently. Your business operations depend on it.

App Usage and Progression

As we all know, technology is constantly evolving. Device manufacturers are always striving for the fastest, most powerful offering to stay ahead of their competitors.

This means that apps and software also move fast to keep up. This constant evolution means that you need more and more data with every update. Thus, the requirements of your Wi-Fi network are likely to change and be modified accordingly.

Wireless is often the first choice – If not the only choice! So you need to make sure your business Wi-Fi offering is up to scratch.

 

Physical Changes in the Office Landscape

You might not think too much about rearranging the office, but this could have a significant impact on your coverage area and how your access points function.

Tweaks like going from open plan to individual offices (or the other way around) will change the way your AP’s perform in your office space.

Interior walls (or lack of them) will affect the radio frequency and how it attenuates. You might be thinking, surely removing partition walls to make an open plan office couldn’t cause Wi-Fi problems. Ut actually it could! The RF will be able to travel further without any attenuating interior walls, meaning it could start contending with other channels and cause interference.

Any physical changes in your office environment need to be surveyed to see if and how it will affect how your Wi-Fi network functions. This means you can make the necessary adjustments before problems arise.

 

Identify Common Causes of RF Interference

Following on from physical changes in your office environment, you need to also be aware of other possible causes of RF interference.

Once possible source of interference on your Wi-Fi network could be noise from neighbouring networks. Other AP’s in range of your coverage area could cause RF interference, especially if their power levels are turned up.

Wi-Fi interference is when you have AP’s that are operating on the same or adjacent frequencies. This can cause interference or contention on these channels, or Overlapping Basic Service Set (OBSS). If your network is experiencing this type of interference, you could see your ability to send or receive data significantly reduce or even completely disabled.

You can also get non–Wi-Fi Interference from devices that use other radio networks. Things like microwaves, monitors, blue tooth or surveillance cameras could all cause interference problems.

 

Your Business Depends on your Wi-Fi Network

If you’ve gone to the effort of designing and planning the optimum network for your business, then don’t waste that work by not monitoring and maintaining it.

Even the best networks will need tweaks and changes over time, to make sure it can keep up with the demands of new users and modern devices.

Regular monitoring or ‘Wi-Fi health checks’ can help identify problems while they’re still small – Allowing you to get them sorted out before they start causing your business serious issues. Don’t wait until the IT department are inundated with calls from frustrated, unproductive employees.

If you think your wireless network is in need of a health check, why not give us a call here at Geekabit? Our wireless experts have the knowledge and expertise to diagnose and solve your Wi-Fi problems, improving the reliability and functionality of your business Wi-Fi.

by admin
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Can My Christmas Lights Affect My Wi-Fi?

The 1st December means we can officially start talking about Christmas! December 1st also happens to be National Christmas Lights Day which coincides with many people choosing to put up their Christmas tree (if they haven’t already done so!).

So you fight the knot of Christmas lights that you’ve fetched from the loft, stick on the ‘Christmas is Coming’ playlist on Spotify (thank us later) and flick the switch for the moment of truth – And Bublé buffers as soon as the tree lights up. What’s going on?

There tends to be articles that circulate this time of year about how Christmas lights could be interfering with your Wi-Fi. But is it really the Christmas tree lights that’s causing Mariah to falter on that high note?

If you haven’t put your tree up yet, and you’re a bit of a Wi-Fi geek (like us) then why not do a little experiment to see exactly how much your Christmas tree lights affect your Wi-Fi? Test your internet and download speeds before and after putting up the Christmas tree with the lights turned on.

 

Will my Wi-Fi be affected by my Christmas tree lights?

Let’s face it, no one wants to choose between functioning Wi-Fi and a Christmassy home. People need that bit of festive cheer more than ever this year, but we also need to know we can rely on our Wi-Fi to keep us connected with our loved ones over the festive period (and stream all the Christmas movies…).

There are potential Wi-Fi issues that can arise with Christmas tree lights so we thought it was worth running through a few do’s and don’ts to help avoid any internet interference from happening in your home. But first – what’s the reason Christmas lights could cause internet issues?

 

How can Christmas tree lights interfere with Wi-FI?

Christmas lights emit a very weak electromagnetic field which can theoretically interfere with the radio waves being transmitted from your router, thus affecting your Wi-Fi speed. If the lights were to transmit electromagnetic radiation at or around the same frequency, then it is possible that they could slow down your Wi-Fi.

Between the LED or lamp being completely on or off, it can exhibit negative resistance which in turn causes radio energy. This happens less with modern day lights than older ones though (see below for more info on this).

Is your tree lit up to give a soft glow, or does it look like something fresh out of Blackpool illuminations? The more lights you have, the stronger the electromagnetic field will be.

And the closer the router is to the lights, the higher the chance of interference.

So what can you do to ensure that your beautifully decorated Christmas tree doesn’t knock off your Netflix binge of Christmas movies?

 

Geekabit’s Top Tips to Prevent Wi-Fi Interference this Festive Season

 

Rule #1 – Don’t place things on top of your router

Just don’t do it. This doesn’t just go for decorations, but in general. We can’t stress this enough – Don’t put anything on top of your router.

This includes Christmas lights – No matter how festive they look! Don’t put Christmas lights or anything else directly on top of, or too close to, your router.

Whilst it has been reported that routers that were placed too close to Christmas tree lights could be negatively affected by signal interference, if they’re not directly next to each other or on top of each other, it should be fine.

 

Rule #2 – Use a main plug socket

We get it – Christmas is one of those times of year when you’re struggling for socket space and digging out all the extension cables you can find to be able to power Christmas tree lights and all kinds of other lit decorations.

But don’t be tempted to unplug the router and plug it into the extension cable. It will work a lot better, and faster, if it’s plugged into a main socket.

 

Rule #3 – The more modern the lights, the better

There are generally 2 types of light whose qualities have the potential to cause interference.

Older types of Christmas lights that are arranged in a string of low voltage lamps in series with each other and are designed to blink can cause radio interference which can lead to dips in Wi-Fi speed.

More modern Christmas lights use solid-state LED’s and have an external control for flashing which don’t create radio noise. However, it’s worth noting that some LED’s have a chip inside the bulb to control the blink and these devices can also cause interference.

On the whole though, modern lights are definitely less likely to cause you a Wi-Fi problem, so maybe save yourself the annual horror of trying to untangle your 10 year old string of lights and treat yourself to some new ones.

 

Rule #4 – Don’t put your router in ‘high traffic’ areas

Tis the season for family gatherings, friend get-togethers and all sorts of festive shenanigans. Not to mention the big man in red tumbling down the chimney! Humans are great signal absorbers, so put the router in a place where it won’t get blocked by partying people or round bellies that shake like jelly.

 

Did you do the Wi-Fi speed test before and after? We’re pretty sure the results will be rather negligible but we’d love to hear your results!

 

by admin
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The Fundamentals of a Wireless LAN

We were going to call this blog ‘WLANs for Dummies’ but that seemed a bit harsh so we settled on the fundamentals of a wireless LAN instead.

A wireless LAN, or WLAN, might seem complicated on the surface but actually it really just follows simple laws of physics. If you can understand these and follow them, then there shouldn’t be any reason why you can’t achieve high performance and scalability for your WLAN.

If you can understand the basics of wireless physics, then you can start to plan your WLAN for a successful deployment. It will also help you to troubleshoot an existing WLAN exhibiting issues.

How Does Data Travel Through a WLAN?

First things first – Let’s look at wave properties.

Data transmits, or travels, from one point to another – e.g. between wireless access points – via electromagnetic waves. This energy travels at the speed of light and operate at different frequencies.

The frequencies of these electromagnetic waves are defined by how many periodic cycles are completed by second.

For example:

How is Frequency Measured?

As we said above, frequency is how many wave cycles are completed per second. This is measured in Hertz. A 2Hz waveform is 2 completed wave cycles in a period of 1 second.

How Does Frequency Affect a WLAN?

A phenomenon called Free Space Path Loss is something that causes signal loss when a waveform travels from one point to another. This is what affects how well data travels across a wireless network.

Different wavelengths (frequencies) experience difference signal loss. The lower the frequency, the longer the wavelength, and the longer the wavelength, the further it can travel before signal gets lost.

For example, 2.4GHz have longer wavelengths than higher frequencies like 5GHz.

How is Wi-Fi Signal Loss Measured?

We measure the energy that is associated with received wireless signals in Decibels (dB). We can also measure loss of signal in this way.

Decibels are logarithmic. On the linear domain, when you add decibels it grows exponentially and when you subtract decibels it reduces exponentially.

The 3dB rule

Every 3dB change, there is a doubling of energy (if increasing) or a halving of energy (if decreasing).

As a ratio, this would look like:

If we had the wireless signal energy at
1:10dB

Then doubling it would be
2:13dB

Remembering this rule can help with both analysing the energy associated with wireless signals as well as predicting it.
Similarly, if you add or subract 10dB, it changes by a factor of 10.

The Relationship Between Frequency and Wireless Signal

Let’s take a look at 2.4Ghz and 5GHz frequencies or waveforms. 5GHz is a higher frequency, so has more wavelengths in a given time period. 5GHz has more wireless signal loss (attenuation) than 2.4GHz, and thus is better for high-density areas. 2.4GHz has less wavelengths in a given time period and is better suited for wider coverage. Bear this in mind when you are planning or troubleshooting a wireless network.

How is Wireless Signal Affected by Different Materials?

In an ideal world, you would have a clear line of sight between your wireless points. In reality, this is rarely the case and you will often find things that get in the way and stop the wireless signal from traversing effectively across your network.

Different materials will affect wireless signals and attenuation in different ways.

Materials such as concrete will cause more attenuation of wireless signal than wood.

In scenarios where wireless signals can propagate (the action of spreading) normally, there is no interference from other materials. However, there are some things that can alter the propagation of a wireless signal, causing it to behave differently and potentially become unreliable.

For example, a WLAN environment with metal surfaces may encounter unpredictability with wireless signal due to it reflecting off the metal.
Wireless signal can also be absorbed by certain materials like water or people, causing the signal to falter.

Being mindful of materials during the WLAN planning stage can help ensure the environment doesn’t hinder your wireless network and you have reliable connectivity results.

Co-Channel Interference

Different materials aren’t the only thing that can interfer with wireless signals.

Due to the 2.4GHz and 5GHz frewuency bands being unlicensed, there are no restrictions on people when extending wireless networks with access points.

This means that they can become crowded as well as channels not being assigned efficiently. Both of these issues can cause co-channel interference.

When planning your WLAN it’s important to take these issues nito consideration and plan your wireless network accordingly so as not to risk problems with wireless signal later down the line.

You want your WLAN to be as effective and efficient as it can possible be, which takes planning and wireless network knowledge.

Whilst the 2.4GHz is popular due to its propagation qualities due its waveforms passing through materials like walls more easily and reaching end users at a long distance. This however has meant that its become crowded with competing devices such as cordless telephones, baby monitors and bluetooth devices. This saturation can cause problems with your wireless signal.

In comparison, the 5GHz spectrum has greater availability and relaxed transmission power giving it more flexibility when it comes to wireless networks.

The 2.4GHz band has only 3 channels without any overlap, whereas the 5GHz has 24. This is another reason why the 5GHz band is favoured for high-density WLAN environments.

Understanding Frequency Channels

To ensure you can maximise the performance and scalability of your WLAN, you need to understand how these channels operate and use that knowledge to avoid co-channel interference.

Let’s take an Access Point as an example. An AP will have a specific bandwidth through which it will transmit and receive signals to and from other points. The channel assigned to the AP will be appropriate for the centre frequency of the first 20MHz channel used by the AP.

This bandwidth is specifically the frequency range over which the data signals are transmitted. Peak transmission and power is spread over the range of that bandwidth, with it dropping off at the edges.

These edges are then at risk of meeting other nearby wireless networks and are prone to interference from the ‘noise’ of these other networks.

It’s important to use what you know about channels to prevent the reduction of wireless signal speed and loss of scalability of your wireless network.

In order to minimise interference between neighbouring access points, choose to assign them with non-adjacent channels. Following this will make it easier to scale your network. If you don’t follow this principle, you will likely encounter problems with latency and throughput.

The best way of reducing interference when assigning WLAN channels is to carry out a Wi-Fi site survey. This involves analysing the noise levels across the spectrum so you can make informed decisions for your wireless network.

Call The Experts

If this all sounds a bit complicated, then why not give us a call here at Geekabit? We have Wi-Fi expert engineers working out of Hampshire, Cardiff and London who can take care of all your Wi-Fi woes.

From Wi-Fi site surveys, to planning and installation, we’ve got your WLAN covered. GIve us a call or drop us an email to see how we can help keep you and your business connected.

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Wi-Fi Advice Wi-Fi Interference
How Does Capacity and Coverage affect Wi-Fi Interference?

This week’s blog is the last in our series on Wi-Fi interference and what you can do about it. So far we’ve covered physical causes of Wi-Fi interference, how electrical devices can affect Wi-Fi through frequency interference and today we’re talking about capacity and coverage.

How does capacity affect Wi-Fi interference?

Capacity problems are most commonplace in corporate environments like offices. A potential issue that these environments might face is having too many users per broadcast device. This causes a capacity overload and that’s when you start to run into Wi-Fi problems.

Each Wi-Fi broadcast device, e.g. a router or access point, has a finite amount of bandwidth. This bandwidth is divided by the number of wireless devices connecting to it. So if only 10 devices are connected, then the bandwidth for that router will be divided by 10. It’s almost irrelevant how fast the internet connection is – If 50 people try to connect then the bandwidth is going to split 50 ways.

Ways to avoid issues with capacity and bandwidth, is to make sure that you don’t have just one router or access point serving an area of high density. If you have a lot of users or users with multiple devices in a certain area, then make sure you have the necessary number of broadcast devices. You might find our blog on ‘How Many Access Points do I need?’ helpful for this.

How does coverage affect Wi-Fi interference?

It’s not just about the capacity in an area, you also need to consider the distance that people are needing to connect across. Getting Wi-Fi coverage right is just as important as capacity.

We all know that that closer we are to a broadcasting device, the stronger and more reliable the signal is going to be. If you know that there will be users in a particular area of your office or business that will need to connect, then make sure that there is a device close-by enough to transmit a strong signal.

Coverage isn’t all about distance, it’s also about whether your devices are installed effectively. For example, it’s pointless installing an access point in close range to users if it’s pointing in the wrong direction, or hidden behind something. Wireless broadcast devices like routers or access points emit their signal in certain directions. Obviously you can’t see what way the radio signals are going so make sure that devices are installed properly. Access points that are hidden behind shelves, or wedged in ceiling tiles are not going to work the way they were intended to. Always check the instructions and manufacturers guide when installing any hardware so that they work effectively and reach the maximum coverage possible. If you’re not sure, then ask the experts!

What can we conclude on the types of Wi-Fi interference and their resolutions?

Wi-Fi has come a long way since it first arrived in our lives, and while the gap between wireless internet and wired is certainly closing, there’s always going to be some inferiority for Wi-Fi when comparing the two.

Some of the resolutions we’ve covered in this series of blogs on Wi-Fi Interference are:

  • Check for physical obstruction risks such as metal and concrete, and place your broadcast devices strateigically to mitigate risks.
  • Check your kit and upgrade where necessary. Devices that can use the 802.11ac frequency with dual band functionality are really useful for scenarious where you need to swap from 2.5Ghz to 5Ghz.
  • Always check for firmware upgrades. A bit like how you update the apps on your smartphones, manufacturers are constantly trying to better their performance by enhancing the software that runs them so do keep a watch for updates which are often free.

It’s so important to take careful consideration when designing your Wi-Fi network. If you don’t feel confident assessing your environment for the potential issues in this series of Wi-Fi interference blogs, then consider calling in the experts. Our Wi-Fi engineers can carry out a Wi-Fi survey followed by planning and design and finished with expert installation for effective and reliable Wi-Fi.

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Wi-Fi Advice Wi-Fi Interference
What Causes Wi-Fi Interference?

Who put up their Christmas decorations at the weekend? It’s a little bit on the early side, but we think it can be forgiven this year! You might be wondering, what have Christmas decorations got to do with the causes of Wi-Fi interference? Read on and all will be illuminated (hint hint).

In last week’s blog we talked about how to diagnose Wi-Fi interference – What signs to look for that point to this being the cause of your Wi-Fi issues. As promised, this week we’re looking at the possible causes of Wi-Fi interference, and what you can do about them.

What causes Wi-Fi Interference?

2 of the main problems associated with Wi-Fi interference are Physical Barriers and Frequency Interference. Capacity can also cause Wi-Fi interference, but we’ll get to that next week.

Physical Barriers that can Cause Wi-Fi Interference

Does your home or office have that one particular spot where no matter how hard you try or where you place your device, you just can’t seem to get reliable Wi-Fi?

In this scenario the reason for Wi-Fi interference is probably the material that the building is made from. Certain materials can cause more of a barrier than others when it comes to Wi-Fi reaching your device.

Check out the chart below to see what materials act as the biggest barriers, and thus cause the most Wi-Fi interference.


Image 1. Chart to show the interference levels of certain building materials.

How can I combat a physical barrier causing Wi-Fi interference?

  • The first thing to try is moving your router or access point. Try a location that means the Wi-Fi signal doesn’t have to go through the barrier.
  • An alternative would be to try broadcasting your signal on a different frequency. If your device has this option available, then try changing it to use 5GHz. (This may only be an option on higher end devices).
  • Remember that humans make excellent barriers! If you’re experiencing Wi-Fi interference problems on a mobile device, consider holding it in a different way.

 

Wi-Fi Interference through Frequency

Imagine a narrow road with a car and lorry coming towards each other from opposite directions. They can’t both fit through at the same time – One of them is going to get through and one of them will have to stop. Frequency interference is a bit like this – If another signal crosses the path of your signal on a similar bandwidth and overpowers it, your signal will be interfered with.

What devices cause Wi-Fi interference with their frequency? The list is rather long unfortunately, and always being added to. Here is a list of devices that commonly cause bandwidth interference.

Christmas Tree Lights – Here’s why we were asking if you’d put your Christmas decorations up at the weekend! Christmas lights are commonly written about at this time of year because they known to be a common cause of Wi-Fi interference due to oscillating on the same frequency. Avoid placing your Christmas tree anywhere near internet equipment.

Other Wireless Devices – Any device that transmits or receives a wireless signal can also cause interference to another signal. There are many things in a home that could potentially cause Wi-Fi problems, such as wireless speakers, baby monitors and garage door openers.

Microwaves – Trying to scroll Instagram while your lunch is whirring around the microwave? If you’re struggling to do so then it might be because most microwaves operate on the 2.4GHz spectrum. This is the same as a lot of wireless devices (especially so on older, less expensive models). So that Instagram scroll might be a bit on the slow side.

Fridges – There are two things with fridges that can cause Wi-Fi interference. The first is the motors on the inside of a fridge, and the other is the fact that they are packed with ice which can act as a physical barrier. Keeping your router away from the fridge, and probably the kitchen in general, is a good idea.

Cordless Wi-Fi Phones – Remember when you couldn’t be online at the same time as someone talking on the phone? You might think those days are over but they’re not as distant as you may think. Cordless phones commonly operate on the 2.4GHz spectrum, so you may well experience Wi-Fi interference while you are talking on the phone or even just when the phone is ringing.

External Monitors & Displays – Commonly on the 2.4 GHz band (channels 11 to 14), certain displays can emit harmonic interference.
Satellite Dishes – Satellite dishes can leak signal interference into the local vicinity if they have been wired up wrong or if they are old and the wiring is deteriorating.

Hearing Aids – You may experience Wi-Fi interference if someone with a hearing aid in in close proximity to a wireless broadcasting device like a router.

Neighbours – You can struggle with Wi-Fi signal and performance if your network is in close proximity to another one, especially if it is a powerful Wi-Fi network like the ones you tend to see in corporate environments. If you need help detecting this issue, you can install a WLAN controller with a rogue detection function.

Fish Tanks – These are known to be an issue to internet connectivity in general. They commonly cause interference to Wi-Fi signal as they oscillate on the same frequency. Always place fish tanks away from internet equipment, especially broadcasting devices.

Poorly Shielded Cabling – If you use external hard drives or other devices that you need to be physically cabled to in order to connect, then this can lead an interference with wireless signal. To test if any Wi-Fi issues are due to poorly shielded cables, simply remove the offending device temporarily and see if the problem improves. If the issue goes away then you can replace the troublesome cable to resolve the issue permanently for that device.

How do I solve a Wi-Fi interference issue if it’s due to frequency?

  • Most instances of frequency-based Wi-Fi interference can be solved by changing the broadcast channel on your Wi-Fi device.
  • Channels can largely be set between 1 and 13 – Try out a few different ones to see which one works the best.
  • In the UK, the best channels to use are 1, 7 and 13.
  • You can have a look and see which channel is most commonly used in your area by using a Wi-Fi scanning tool such as WiFi Analyzer. You can then choose the least used channel, confident that you will encounter less Wi-Fi interference.
  • If you have a high-end router, you will have the option to use 5GHz. This is the most effective way to solve Wi-Fi interference issues.

If you’ve checked these and tried the solutions but are still having Wi-Fi problems, then don’t be afraid to call in the experts! Our Wi-Fi engineers are still working, mainly out of Hampshire and London, and can help with a variety of Wi-Fi problems.

Check back next week when we’ll be talking more about Wi-Fi interference, in regards to capacity and coverage.

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Wi-Fi Advice Wi-Fi Interference
Are My Wi-Fi Issues Caused by Wi-Fi Interference?

Since 1997, when Wi-Fi emerged into the consumer world, it’s become integral to everyday life. For many it’s a vital way of staying connected with friends, family and colleagues – At home, at work and even out and about.

We tend to take it a bit for granted, when in actual fact we probably feel like we couldn’t live without it – Especially during 2020! And like so many things – We really only notice how much we depend on it when it’s not there. Much like when there is a power cut and all the lights go out – When Wi-Fi isn’t working properly, we really feel it’s absence.

Is there anything quite as frustrating as dodgy Wi-Fi?

Technology wouldn’t be technology without its issues, and Wi-Fi is no exception. So what can cause Wi-Fi problems? One of the biggest issues to affect how successful and reliable a Wi-Fi connection is, is Wi-Fi interference. In this blog we’re going to be looking at how you might go about detecting whether your Wi-Fi woe is an interference issue

How do I know if my Wi-Fi issue is due to Wi-Fi interference?

Here are a couple of problems you may experience if you are having trouble with Wi-Fi interference.

 

  • Trouble with signal strength, and having low signal despite being in close proximity to a Wi-Fi broadcast device like a router
  • You have no connectivity issues when using a wired connection, but have a considerably slower connection when connecting using Wi-Fi
  • Trying to transfer files between computers using Wi-Fi, and finding it very slow
  • Being unable to pair devices using Wi-Fi or Bluetooth despite being in close proximity to the receiver
  • Your Wi-Fi connection Intermittently dropping out

 

If you are experiencing one or more of these annoying Wi-Fi issues, then it’s quite possible that something is causing interference with your Wi-Fi.

There are two main types of Wi-Fi Interference – Physical and Frequency. We’ll be covering some examples of each of these in next weeks blog. Check back then to see how you can identify what may be causing your Wi-Fi interference issue, and how you can go about fixing it.

If you require any Wi-Fi help in the meantime, then please don’t hesitate to give our Wi-Fi experts a call. We’re still working under the current government guidelines, and mainly operating out of Hampshire and London. Don’t let dodgy Wi-Fi be the reason you can’t find a connection.

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