6 Communication Protocols Used by IoT

6 Communication Protocols Used by IoT 

The Internet of Things (IoT), is based on the networking of things. In a nutshell, Internet of Things is defined as a “proposed development of the Internet in which everyday objects have network connectivity, allowing them to send and receive data.”

The most important thing here is connectivity among objects.

Research companies like Gartner have predicted that Internet of Things will grow to 26 billion units in 2020. How will the devices be connected and what would communication be like? How will wireless communication protocols evolve?

We can boil down the wireless communication protocols into the following 6 standards:

1.   Satellite

2.   Wi-Fi

3.   Radio Frequency (RF)

4.   RFID

5.   Bluetooth

6.   NFC

In the following paragraphs, we will provide a brief overview and illustration of each of the Internet of Things communication techniques, their pros and cons, and their smartphone compatibilities.

1. Satellite

Satellite communications enable cell phone communication from a phone to the next antenna of about 10 to 15 miles. They are called GSM, GPRS, CDMA, GPRS, 2G / GSM, 3G, 4G / LTE, EDGE, and others based on connectivity speed.

In the Internet of Things language, this form of communication is mostly referred to as “M2M” (Machine-to-Machine) because it allows devices such as a phone to send and receive data through the cell network.

Pros and Cons of Satellite Communication

Pros:

·        Stable connection

·        Universal compatibility

Cons:

·        No direct communication from smartphone to the device (It has to go through satellite)

·        High monthly cost

·        High power consumption

Examples of satellite connectivity would include utility meters that send data to a remote server, commercials updated on digital billboards, or cars via Internet connectivity.

Satellite is useful for communication that utilizes low data volumes, mainly for industrial purposes but in the changing near future where the cost of satellite communication is gradually falling, the use of satellite technology might become much more viable and interesting for consumers.

2. WiFi

WiFi is a wireless local area network (WLAN) that utilizes the IEEE 802.11 standard through 2.4GhZ UHF and 5GhZ ISM frequencies. WiFi provides Internet access to devices that are within the range (about 66 feet from the access point).

Pros and Cons of WiFi

Pros:

·        Universal smartphone compatibility

·        Affordable

·        Well protected and controlled

Cons:

·        Relatively high power usage

·        Instability and inconsistency of WiFi

An example of WiFi connectivity would be Dropcam streaming live video via the local WiFi instead of streaming through a connected Ethernet LAN cable. WiFi is useful for many Internet of Things connections but such connections typically connect to an external cloud-server and are not directly connected to the smartphone. It is also not recommended for battery-powered devices due to its relatively high power consumption.

3. Radio Frequency (RF)

Radio frequency communications are probably the easiest form of communication between devices. Protocols like ZigBee or ZWave use a low-power RF radio embedded or retrofitted into electronic devices and systems.

Z-Wave’s range is approximately 100 ft (30 m). The radio frequency band used is specific to its country. For example, Europe has an 868.42 MHz SRD Band, a 900 MHz ISM or 908.42 MHz band (United States), a 916 MHz in Israel, 919.82 MHz in Hong Kong, 921.42 MHz in the regions of Australia/New Zealand) and 865.2 Mhz in India.

ZigBee is based on the IEEE 802.15.4 standard. However, its low power consumption limits transmission distances to a range of 10 to 100 meters.

Pros and Cons of Radio Frequency

Pros:

Low energy and simplicity for its technology is not dependent on the new functionality of phones

Cons:

Radio frequency technology is not used by smartphones and without a central hub to connect the RF devices to the internet, the devices cannot be connected

An example of radio frequency connectivity would be your typical television remote for it uses radio frequency, which enables you to switch channels remotely. Other examples include wireless light switches, electrical meters with in-home displays, traffic management systems, and other consumer and industrial equipment that requires short-range low-rate wireless data transfer.

Radio frequency communication protocol is useful for large deployments such as hotels where a high quantity of devices are required to be centrally and locally managed. However, in the near future, the technology might become increasingly outdated and be replaced by Bluetooth mesh networks.

4. RFID

Radio frequency identification (RFID) is the wireless use of electromagnetic fields to identify objects. Usually, you would install an active reader, or reading tags that contain a stored information mostly authentication replies. Experts call that an Active Reader Passive Tag (ARPT) system. Short-range RFID is about 10cm, but long-range can go up to 200m. What many do not know is that Léon Theremin invented the RFID as an espionage tool for the Soviet Union in 1945.

An Active Reader Active Tag (ARAT) system uses active tags awoken with an interrogator signal from the active reader. Bands RFID runs on: 120–150 kHz (10cm), 3.56 MHz (10cm-1m), 433 MHz (1-100m), 865-868 MHz (Europe), 902-928 MHz (North America) (1-12m).

Pros and Cons of RFID

Pros:

Does not require power

Established and widely used technology

Cons:

Highly insecure

Ongoing cost per card

Tags need to be present as identifier and be handed over before

Not compatible with smartphones

Examples include animal identification, factory data collection, road tolls, and building access. An RFID tag is also attached to an inventory such that its production and manufacturing progress can be tracked through the assembly line. As an illustration, pharmaceuticals can be tracked through warehouses. We believe RFID technology will very soon be replaced by near-field communication (NFC) technology in smartphones.

5. Bluetooth

Bluetooth is a wireless technology standard for exchanging data over short distances (using short-wavelength UHF radio waves in the ISM band from 2.4 to 2.485 GHz). If you look at the frequencies it is actually the same as WiFi such that these two technologies seem very similar. However, they have different uses. The 3 different styles of Bluetooth technology that are commonly talked about are:

Bluetooth: Remember the days where you associate Bluetooth as a battery drainer and black hole? Such Bluetooth is a heyday relic of a mobile past marked by a bulky cell phone. Such Bluetooth technology is battery draining, insecure, and are often complicated to pair.

BLE (Bluetooth 4.0, Bluetooth Low Energy): Originally introduced by Nokia and presently used by all major operating systems such as iOS, Android, Windows Phone, Blackberry, OS X, Linux, and Windows 8, BLE uses fast, low energy usage while maintaining the communication range.

iBeacon: It is the trademark for a simplified communication technique based on Bluetooth technology that Apple uses. What it actually is: a Bluetooth 4.0 sender that transmits an ID called UUID, which is recognized by your iPhone. This simplifies the implementation effort many vendors would previously face. Moreover, even non-technically trained consumers can easily use iBeacons like Estimote.com or other alternatives. Although different on a technical level, iBeacon technology can be compared to NFC on an abstract level.

Bluetooth exists in many products, such as telephones, tablets, media players, robotics systems. The technology is extremely useful when transferring information between two or more devices that are near each other in low-bandwidth situations. Bluetooth is commonly used to transfer sound data with telephones (i.e., with a Bluetooth headset) or byte data with hand-held computers (transferring files). Bluetooth protocols simplify the discovery and setup of services between devices. Bluetooth devices can advertise all of the services they provide. This makes using services easier because relative to other communication protocols, it enables greater automation such as security, the network address, and permission configuration.

Comparison of Wifi & Bluetooth

Wi-Fi and Bluetooth are to some extent complementary in their applications and usage.

Wi-Fi

·        Access point centered, with an asymmetrical client-server connection where it provides all traffic routed through the access point.

·        ‍Serves well in applications where some degree of client configuration is possible and high speeds are required e.g. network access through an access node

·        ‍Ad-hoc connections are possible with WiFi but not as easily with Bluetooth for Wi-Fi Direct was recently developed to add a more Bluetooth-like ad-hoc functionality

Bluetooth

·        ‍Symmetrical between two Bluetooth devices

·        ‍Serves well in simple applications where two devices are needed to connect with minimal configuratione.g. headsets and remote controls

·        ‍Bluetooth access points do exist although they are not common

Any Bluetooth device in discoverable mode transmits the following information on-demand:

·        Device name

·        Device class

·        List of services

·        Technical information (for example device features, manufacturer, Bluetooth specification used, clock offset)

Pros & Cons of Bluetooth

Pros:

·        Every smartphone has Bluetooth where the technology is continuously being upgraded and improved through new hardware

·        Established and widely used technology

Cons:

·        Hardware capabilities change very fast and will need to be replaced

·        Running on battery the lifetime of an iBeacon is between 1month to 2 years

·        If people switch off Bluetooth, there are issues in usage.

Bluetooth technology mainly finds applications in the healthcare, fitness, beacons, security, and home entertainment industries.

Bluetooth technology is definitely the hottest technology right now but it is many times overrated or misunderstood in functionality. If the application goes beyond fun you will have to dig deep in configuration and different settings as different phones react differently to Bluetooth.

6. Near Field Communication (NFC)

Near-field communication uses electromagnetic induction between two loop antennas located within each other’s near field, effectively forming an air-core transformer. It operates within the globally available and unlicensed radio frequency ISM band of 13.56 MHz on ISO/IEC 18000-3 air interface and at rates ranging from 106 kbit/s to 424 kbit/s. NFC involves an initiator and a target; the initiator actively generates an RF field that can power a passive target (an unpowered chip called a “tag”). This enables NFC targets to take very simple form factors such as tags, stickers, key fobs, or battery-less cards. NFC peer-to-peer communication is possible provided both devices are powered.

There are two modes:

Passive communication mode: The initiator device provides a carrier field and the target device answers by modulating the existing field. In this mode, the target device may draw its operating power from the initiator-provided electromagnetic field, thus making the target device a transponder.

Active communication mode: Both initiator and target device communicate by alternately generating their own fields. A device deactivates its RF field while it is waiting for data. In this mode, both devices typically have power supplies.

Pros & Cons of NFC

Pros:

·        Offers a low-speed connection with an extremely simple setup

·        Can be used to bootstrap more capable wireless connections

·        NFC has a short-range and supports encryption where it may be more suitable than earlier, less private RFID systems

Cons:

·        Short-range might not be feasible in many situations for it is currently only available on new Android Phones and at Apple Pay on new iPhones

Comparison of BLE to NFC

BLE and NFC are both short-range communication technologies that are integrated into mobile phones.

Speed: BLE is faster

Transfer: BLE has a higher transfer rate

Power: NFC consumes less power

Pairing: NFC does not require pairing

Time: NFC takes less time to set up

Connection: Automatically established for NFC

Data transfer rate: Max rate for BLE is 2.1 Mbits/s, max rate for NFC is 424 kbits/s.

(NFC has a shortage range, a distance of 20cm, which reduces the likelihood of unwanted interception hence it is particularly suitable for crowded areas where correlating a signal with its transmitting physical device becomes difficult.)

Compatibility: NFC is compatible with existing passive RFID (13.56 MHz ISO/IEC 18000-3) infrastructures

Energy protocol: NFC requires comparatively low power

Powered device: NFC works with an unpowered device.

NFC devices can be used in contactless payment systems, similar to those currently used in credit cards and electronic ticket smartcards, and it allows mobile payment to replace or supplement these systems.

We believe that NFC will definitely replace the more insecure and outdated RFID cars where its use on smartphones will be limited to contact-only applications like payment, access, or identification.

Conclusion: And the IoT Winner Is?

It is very likely that the winner of these standards will be one that is available in many of the new devices and phones – otherwise, people would not use it. Today every smartphone has Bluetooth and WiFi. However, NFC is increasingly being implemented in new phones.

From our experience, a clear Internet of Things winner emerges when you have a very defined use-case. For example, if you’d like to transfer large amounts of files, WiFi is ideal. If you’d like to react on transient passengers, nothing tops Bluetooth. If you want quick, short-range interaction, NFC might be for you. Henceforth, the winning communication protocol really depends on your goals and your clearly defined use-case.

There will be many more providers of different standards – especially mesh-networked technologies such as GoTenna or mesh networked iBeacons.

2021 is a big year for Mobile Credentials

2021 is a big year for Mobile Credentials 

Modern electronic access control systems, whether on-premise or cloud-hosted, offer a variety of ways to authenticate users and grant them access to a space. Credentials are typically classified into a few categories, something you have, something you know, something you are, or any combination of these categories (multi-factor).

Keep reading to learn about four of the most common types of access control credentials and how they can help you manage your space more effectively.

In access control and identity management, authentication is done via three factors, namely what you have (keyfobs and access control cards), what you know (passwords) and what you are (biometrics).

Needless to say, more and more people are now using their smartphones to open doors. And 2020-21 is likely to be a big year for mobile credentials, whose market size and deployment are expected to reach a new height.

In terms of the “what you have” factor, regular and smart cards have been in use for a long time, whereby the user either taps the card on the reader or bring the card close to it. Yet more and more, mobile credentials, or user credentials stored in the user’s mobile phone which can then interact with the reader, have become a more popular concept and are increasingly deployed in certain end user entities such as offices, college dorms and hotels.

1. RFID

Historically, the most common credential is RFID technology using some sort of card or fob (something you have). These RFID options can range from basic proximity cards and fobs to more advanced and secure smart cards that use integrated circuit chips embedded into the card itself to provide encrypted communication with the access control readers. Not all access control cards are secure as some can be easily sniffed and cloned. Access control cards can also easily be lost or stolen, which can create a vulnerability.

2. PIN Codes

PIN codes are also a popular method where a PIN code (something you know) is assigned to a user and then used as their credential to access a space. With PIN codes, a user walks up to the keypad on a door and types in a numerical code assigned to them to authenticate and gain access to a space. PIN codes do have some drawbacks as well. PIN codes are often shared, creating a security risk. In addition, PIN codes can be cumbersome to administer and maintain.

3. Biometric

Biometric credentials have grown in popularity over the past several years and can include multiple biometric features (something you are). There are biometric devices that can scan fingerprints, retinas, or the palms of your hand to authenticate you and grant or deny access. Another biometric option is facial scanning where a device can scan a face to determine facial features that can be turned into a hash that can then be used as a credential. Biometric readers have come a long way and can offer a high level of security, but in order for biometric readers to work effectively and efficiently, they need to be installed in the right location and in the right environmental conditions.

4. Mobile Credentials

Perhaps one of the fastest-growing credentials lately is mobile credentials. Mobile credentials allow users to have a credential stored on their mobile devices, usually in the form of a mobile app, that they can use to gain access to spaces providing those spaces have compatible hardware. As a user approaches a reader, they can make an unlock request using a button on their phone or even a gesture, to gain access. Mobile credentials also have the advantage of providing multi-factor authentication easily by leveraging the built-in PIN code functionality or biometric readers of the mobile device for additional security. A system administrator can require that in addition to the mobile credential a user needs to provide either a PIN code and/or a fingerprint/facial recognition, whichever method the mobile device supports. Mobile credentials have grown in popularity so much because just about everyone has a mobile device with them at all times, and they are easy to administer compared to managing RFID cards or PIN codes.

In fact, 2020 is set to be a big year for mobile credentials as suggested by various stats and figures. Gartner, for example, has predicted that in 2020, 20 percent of organizations will use smartphones in place of traditional physical access cards, compared to just 5 percent back in 2016.

Growth drivers

That the mobile credential trend is picking up is quite understandable due to their various benefits, among them the convenience factor. Whereas the user may forget to bring their keycard, they are less likely to forget to bring their smart device. Further, compared to keycards, smartphones are less likely to be lost as users attach greater importance to them. On a related note, since chances are the user already has a mobile device, the end user entity does not have to spend extra cost to make cards for their staff.

Besides those benefits, wider technology availability will drive growth as well. “When they first appeared about 10 years ago, mobile credentials used near-field communication (NFC). Since Apple never provided API access to its NFC capabilities, adoption was limited, because the technology was only available to Android users. Today’s mobile credentials use Bluetooth, which is supported by all smartphone manufacturers and many wearables, such as smartwatches, and is therefore available to virtually everyone with a smart device. Bluetooth also ups the convenience factor since Bluetooth readers allow users to open doors without even taking their phones out of their pockets. If your customer uses a cloud-based access control system, mobile devices can communicate directly with the cloud via Wi-Fi or cellular.
 
Meanwhile, compared to cards, which can be duplicated or cloned, the mobile device has more security features. The biometric function that unlocks the phone in and of itself is a security feature that prevents misuse by others in the even the phone is lost. Meanwhile, the latest technologies also enable communications to be safer between the phone and the reader.
 
Finally, mobile credentials have the “wow” factor. “Everyone loves new gadgets, especially ones that make their lives easier. Mobile credentials are no exception. Our salespeople tell stories of closing deals as soon as they show prospective customers that they can unlock their doors with their smartphone. Property managers have begun listing mobile credentials as one of their high-tech amenities to attract new residents. Users of mobile credential apps write glowing reviews about convenience.

Still not sure which access control credential solution is right for you? We’re here to help.

The goal is no longer just limiting access to a particular space but rather managing that space effectively.

Modern electronic access control systems offer a wide variety of features to allow you to better manage business spaces and to protect your business and your brand.

Working with a qualified security sales consultant will ensure you are not installing old technology into a new installation. There is an access control solution available that is convenient, secure, and works for your user’s technology level. You can touch with SSA Integrate to get proper way, what actual is required for your premises. They are solution service provider for SUPREMA, Magnetic FAAC & certified for Honeywell Winpak Access Control.