Long Range Bluetooth Marketing
May 27, 2009 13 Comments
Have you ever come across a specialist ‘Long Range Bluetooth Marketing’ provider, who can deliver advertising content to consumers’ mobile phones who are 100m, 500m or even 1km away from the transmitter?
As Head of Technology at Hypertag, I am intrigued to know whether this technology can actually work. At Hypertag we spend our time developing proximity marketing solutions where we endeavour to limit Bluetooth range to clearly branded zones so the consumer is fully aware they will receive branded content, rather than sending unsolicited content to unknowing consumers. When this happens, we are all affected as it gives our industry a bad name by tainting us with an image of spamming.
In my experience of developing Proximity Marketing solutions, there must be huge technical challenges to providing a long range Bluetooth Marketing solutions.
In the first instance, let’s take 100m Bluetooth Marketing, now any Class 1 Bluetooth device will report being able to send data over 100m, great you say, here’s a Class 1 Bluetooth Access Server ( Class 1 = 100mW, Class 2 = 2.5mW, Class 3, 1mW ) so I can do 100m Bluetooth Marketing. The big issue here is that the majority of mobile phones have Class 2 (10m) radios to reduce the phone cost and besides who needs more than 10m Bluetooth range on their phone? The net effect of this for a Proximity Marketing solution is that you’ll be lucky to achieve 30m range in practice.
So we now have a standard Class 1 Access Server and know we can only actually achieve ranges of 30m, but for my particular application that’s ok. Next question is; how many mobile phones will be within range of my Access Server? Considering it will be able to see mobile phones within a 30m radius, I would imagine in a typical football stadium (a location much loved by the Long Range Bluetooth Marketeer!) this will be in the order of 100′s of mobile phones.
Now my big question is; how could any Bluetooth Access Server reliably send content to all these mobile phones? Bluetooth’s original purpose was really to connect hands-free headsets to mobile phones and for connecting computer peripherals to PCs, neither of which are anywhere near as demanding as connecting to 100′s of mobile phones reliably. Bluetooth technology only allows 7 simultaneous connections to be made concurrently. Its download data rates are relatively low and experience shows to expect these to be significantly reduced when a large number of Bluetooth devices are in close proximity interfering with each other.
At Hypertag we have optimised our solutions to download content efficiently in high load environments by using multiple Bluetooth radios, while reducing the range of transmission so our downloads are targeted and keeping the content size to a sensible maximum. The majority of our campaigns will operate at less than 5m range with great results and without upsetting the other mobile phone users further away. I suspect that any solution that attempts to broadcast advertising content using Bluetooth over a wide area will suffer reliability problems and great consumer dissatisfaction. This dissatisfaction will also extend to brand running the campaign.
In summary if your brand or agency is considering using ‘Long Range Bluetooth Marketing’ I would strongly advise considering a managed ‘Proximity Marketing’ solution with managed range contol as the only way to advertise your brand reliably and in a non-intrusive way.
Graham Tricker
I would like to take head on a question I am asked or overhear being asked nearly every week:
When I read many of the blogs that talk about Bluetooth or Proximity Marketing (BPM), it’s often stated that the concept is ‘edgy’ and is pushing the boundaries of innovative ways to actively engage with consumers. How could anyone disagree!