IrDA-Data and Bluetooth


Obviously, similar to IrDA-Data, the Bluetooth standard specify protocol stack as well as divides the different communication tasks hooked on physical, data link, along with other layers. So as to include whichever type of connectivity inside our embedded system, we want the necessary hardware, a protocol stack, along with application programs with the intention of taking benefit of it. Since IrDA-Data is an older standard, lots of vendor of this component are by now existing in addition to the charge of including IrDA hardware as well as software is quite low (approximately $2 per system). Nevertheless, Bluetooth is now beyond the standardization developments with prices are notably higher. We have to make a decision beginning on a case-by-case source which, any condition of these protocols would work best within our creation. In several systems, it might still be advantageous to include equally.

Table 1 offers a feature-by-feature evaluation of the two technologies.



Physical Media


RF (2.4 GHz)

Communications Range

Up to at least 1m

10cm to 100m

Connection Type, Direction

Point-to-Point, Narrow Angle (30 degrees)

Multipoint, Omni-directional

Maximum Data Rate

4Mbps (16Mbps on the way)

1Mbps (aggregate)


Physical limitations offer some built-in protection

Authentication, encryption, spread spectrum

Approximate Cost

under $2

under $5

The benefit for IrDA-standard infrared connection technology includes:

* Propose a common wireless criterion for link every infrared-enabled appliance.

* Trouble-free, unproblematic implementation.

* Inexpensive option to other connection answer.

* Dependable, fast connection.

* Harmless to employ at all environment; yet can be exercise throughout air travel.

* Remove the irritate of wires.

* Permit PC's as well as non-PC's devices to be in touch with every one other.

* Improve mobility by means of allowing client to just “plop and connect”.

Bluetooth Benefits

1. Wireless

Along with improving safety as a result of eliminating wires you don't need, wireless also offers you plenty of other advantages. When traveling with your laptop or other wireless devices, you'll no longer have to worry about bringing connection cables.

2. Bluetooth is actually inexpensive

The technology of Bluetooth is cheap for companies to implement, which results in lower costs for the company. These savings are then passed from the company on to you.

3. Bluetooth is automatic

Bluetooth doesn't have you set up a connection or push any buttons. When two or more devices enter a range of up to 30 feet of each other, they will automatically begin to communicate without you having to do anything.

4. Standardized protocol

Bluetooth is standardized wireless, meaning that an advanced of compatibility between devices is assured. Bluetooth shall unite devices to each other, even if they aren't the same model.

5. Low interference

Bluetooth devices almost always avoid interference from other wireless devices. Bluetooth uses a technique known as frequency hopping, and also low power wireless signals.

6. Low energy consumption

As a result of Bluetooth using low power signals, the technology requires very little energy and will use less battery or electrical power as a result. This is a brilliant advantage intended for mobile devices, since Bluetooth won't consume the battery.

7. Sharing voice and data

The standard for Bluetooth will allocate well-matched devices to share data as well as voice interactions. This is great for mobile phones and headsets, as Bluetooth simplifies driving and talking on your cell phone.

8. Instant PAN (Personal Area Network)

You can connect up to seven Bluetooth devices to each other within a range of up to 30 feet, forming a piconet or PAN. For a single room, you can also set up multiple piconets.

9. Upgradeable

Upgradeable is the standard for Bluetooth. There are newer versions of Bluetooth in the works, which offer many new advantages and backward
compatible with older versions.

10. The technology stays

Bluetooth technology is a global, widespread wireless standard. With it being as popular asit is, you can count on it being around for years to come. As more and more devices start to use Bluetooth technology, more manufacturers will be eager to make their products compatible. A chain reaction will occur, making Bluetooth the standard for cutting edge wireless.

Wi-Fi Benefits

* Visitor pleasure

* Suitable End User Mobility

* Improved Foot transfer

* Improved profits

* Trouble-free Access

* Infinite bendable billing selection

* Full turn Key result


The small fee of creating a Wi-Fi network is one of the driving reasons in favor of its popularity as well being capable to give information anywhere as well as everywhere. It decreases the entry barriers for companies to come into the Wi-Fi industry moreover it is evident through the figure of cellular companies along with Telcos as well as small businesses with persons creating a Wi-Fi network. To configure a Wi-Fi network, an access point or a gateway is necessary which transmit also receives radio signals; furthermore a Wi-Fi radio is compulsory to be embedded in the devices as PC, PDA, as well as Laptops etc. The main difference in terms of price of creating a Wi-Fi network as compared to another network is that Wi-Fi runs in the unlicensed 2.4 -5 GHz radio bands. So there's no fee of acquiring a license as compared to another networks which should pay billions of dollars to get a license for a spectrum for transmission.

Another advantageous thing for people looks for to setting up a Wi-Fi network is that the fees of Wi-Fi access points and radios are declining sharply. The price of a Wi-Fi radio chip which comprised roughly $16 in 2002 will plunge to below $2 in 2006. Likewise the cost of Wi-Fi Access points which were just about $1000 in 2002 are less than $100 currently moreover are predictable to fall more. In addition, the Wi-Fi card was about $700 in 2000 is just about less than $50 now and is come close to be offer as a basic feature in most of the latest PC's being invent today. Since the price to build Wi-Fi networks is cheap and with no license fees to be paid, millions of Wi-Fi networks have been establish as they as well offer better speeds the same as compared towards the conventional broadband as well as cellular networks.

Moreover, the fee of establishing the network the cost benefit of the Wi-Fi network is more improved by the usage fee for accessing data using a Wi-Fi network which is a part to what is being paid by 3G cellular companies to give data services. A normal data transfer over a 3G network charge is between $1 to $4 per megabyte while the similar rates over a Wi-Fi network appear to be about $.01 per megabyte. This additional offer an incentive to build up a Wi-Fi network since it will be attractive to other consumers plus the price will be improved very soon.


The three wireless technologies that I described above have it own pros and cons. Even the benefits of the technologies are differing from one another. Some of the technologies is still widely used in terms of its speed and connectivity. Among the three wireless technology that I mention above, the most I prefer to used is the Wi-Fi.

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