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ICT Communication Protocols
ICT Communication Protocols:- Communication protocols are formal descriptions of digital message formats and rules. They are required to exchange messages in or between computing systems. Communication protocols are important in telecommunications systems and other systems because they create consistency and universality for the sending and receiving of messages.
ICT Communication Protocols
What are Communication Protocols & Their Working
In the digital world, communication protocols create many rules. For instance, on the Internet, the formation of these protocols can be done by groups such as the association of WWW (World Wide Web) or W3C & the IETF (Internet Engineering Task) assists in providing worldwide operations & limits different types of liability as well as vulnerabilities within these technologies. Communication protocol plays a key role when HTTP turns into HTTPS otherwise an extensive use of SSL (Secure Sockets Layer) certificate becomes the standard. Other types of protocols use the data packets within global network routes and sometimes its looks like particle physics. So, technology is advancing day by day, so different communication protocols are used in advanced networks. The Internet of Things (IoT) assures the latest developing communications protocols to connect the wide set of devices to a universal network. This article discusses an overview of communication protocols in embedded systems.
What are Communication Protocols?
The proper descriptions of digital message formats as well as rules are known communication protocols. The main function of these protocols is to exchange messages from one computer system to another. These are significant in telecommunications systems as they consistently send and receive messages. These protocols cover error detection & correction, signaling, and authentication. They can also explain the semantics, syntax & brings analog & digital communications together.
The implementation of these protocols can be done within hardware as well as software. So communications protocols are available around thousand types which are used all over in analog & digital communications, so computer networks cannot be present without them.
Introduction
- Protocol: A set of rules and regulations is called a protocol.
- Communication: Exchange of information from one system to another system with a medium is called communication.
- Communication Protocol: A set of rules and regulations that allow two electronic devices to connect to exchange the data with one and another.
Why is Communication Protocol Important?
Communication protocols assist varied network devices to converse with each other by transmitting the analog signals, digital signals, different files & process the data from one device to other devices. These types of protocols are applicable in telecommunication & computer networks where suitable rules are executed to transmit information from source to destination. The most vital protocols within networking are TCP (Transmission Control Protocol) & User datagram protocol (UDP).
Types of Communication Protocols
There are two types of communication protocols which are classified below:
- Inter System Protocol
- Intra System Protocol
Inter System Protocol
The inter-system protocol using to communicate the two different devices. Like communication between computer to microcontroller kit. The communication is done through an inter bus system.
The different categories of intersystem protocol mainly include the following.
- UART Protocol
- USART Protocol
- USB Protocol
UART Protocol
UART stands for a universal asynchronous transmitter and receiver. UART Protocols is a serial communication with two wired protocols. The data cable signal lines are labeled as Rx and Tx. Serial communication is commonly used for transmitting and receiving the signal. It is transferred and receives the data serially bit by bit without class pulses. The UART takes bytes of data and sends the individual bits in a sequential manner.
UART is a half-duplex protocol. Half-duplex means transferring and receiving the data but not at the same time. Most of the controllers have hardware UART on board. It uses a single data line for transmitting and receiving the data. It has one start bit, 8-bit data and a one-stop bit mean the 8-bit data transfer one’s signal is high to low.
Ex: Emails, SMS, Walkie-talkie.
USART Protocol
USART stands for a universal synchronous and asynchronous transmitter and receiver. It is a serial communication of a two-wire protocol. The data cable signal lines are labeled as Rx and TX. This protocol is used to transmitting and receiving the data byte by byte along with the clock pulses. It is a full-duplex protocol that means transmitting and receiving data simultaneously to different board rates. Different devices communicate with microcontroller to this protocol.
Ex:-Telecommunications.
USB Protocol
USB stands for universal serial bus. Again it is a serial communication of two-wire protocol. The data cable signal lines are labeled D+ and D-. This protocol is used to communicate with the system peripherals.USB protocol is used to send and receive the data serially to the host and peripheral devices.USB communication requires driver software that is based on the functionality of the system.USB devices can transfer data on the bus without any request on the host computer.
Now a day’s most devices are using this technique for communicating with USB protocol. Like a computer to communicate with an ARM controller using USB. USB transfer the data to different modes .first one is slow speed mode 10kbps to 100 kbps; the second one is full speed mode 500kbps to 10mbps, high-speed mode 25mbps to 400 Mbps.USB maximum cable length of 4 meters.
Ex: Mouse, Keyboard, Hubs, switches, pen drive.
Differences Between the Inter System Protocols
The intersystem protocols mainly include UART, USART, and USB
| UART | USART | USB |
| The term UART stands for Universal Asynchronous Transmitter and Receiver | The term USART stands for Universal Synchronous and Asynchronous Data Transmitter and Receiver | The term USB stands for Universal Serial Bus |
| UART mainly includes two wire-based protocols like transmitter and receiver | USART is a two-wire protocol like Transmitter and Receiver | USB is a two-wire protocol like D+ & D- |
| It transmits as well as receives pockets of data by byte without classes pulse | It transmits and receives a block of data through classes pulses | It transmits and receives the data through clock pulses |
| UART is a half-duplex communication | USART is a full-duplex communication | USB is also full-duplex communication |
| UART is slow as compared to USART | USART is slow as compared to USB | It is fast as compared to USART and UART |
Intra System Protocol
The Intra system protocol is used to communicate the two devices within the circuit board. While using these intra system protocols, without going to intrasystem protocols we will expand the peripherals of the microcontroller. The circuit complexity and power consumption will be increased by using the intrasystem protocol. Using intra system protocols circuit complexity and power consumption, the cost is decreased and it is very secure to accessing the data.
The different categories of intrasystem protocol mainly include the following.
- I2C Protocol
- SPI Protocol
- CAN Protocol
I2C Protocol
I2C stands for the inter-integrated circuit and it requires only two wires connecting all peripherals to the microcontroller. I2C requires two wires SDA (serial data line) and SCL (serial clock line) to carry information between devices. It is a master to a slave communication protocol. Each slave has a unique address. The master device sends the address of the target slave device and reads/writes the flag. The address matches any slave device that the device is ON, the remaining slave devices are disabled mode.
Once the address is match communication proceed between the master and that slave device and transmitting and receiving the data. The transmitter sends 8-bit data, the receiver replies 1-bit of acknowledgment. When the communication is completed master issues the stop condition. The I2C bus was developed by Philips Semiconductors. Its original purpose is to provide an easy way to connect CPU to peripherals chips.
Peripheral devices in embedded systems are often connected to the microcontroller as memory-mapped devices. I2C requires only two wires for connecting all the peripherals to the microcontroller. These active wires, called SDA and SCL, are both bidirectional. SDA line is a serial data line and the SCA line is a serial clock line.
I2C Pull-up Resistors
Why given the pull-up resistors in I2C SCL and SDA line.
- Both SDA and SCL lines are open-drain drivers.
- It can drive output low canot driver it high.
- For the lines to be able to go high you must provide pull-up resistors
SPI Protocol
SPI stands for the serial peripheral interface. It is one of the serial communication protocol developed by Motorola. Sometimes SPI protocol is also called a 4-wire protocol. It requires four wires MOSI, MISO, SS, and SCLK.SPI protocol used to communicate the master and slave devices. The master first configures the clock using a frequency.
The master then selects the particular slave device for communication by pulling the chip select button. That particular device is selected and starts the communication between the master and that particular slave. The master selects only one slave at a time. It is a full-duplex communication protocol. Not limited to 8-bit words in the case of bit transferring.
CAN Protocol
CAN stands for the controller area network. It is a serial communication protocol. It requires two wires CAN High (H+) and CAN low (H-). It was developed by the Robert bosh company in 1985 for in-vehicle networks. It is based on a message-oriented transmission protocol.
Differences Between the Intra System Protocols
The intra system protocols mainly include I2C, SPI, and CAN
| I2C | SPI | CAN |
| I2C is an inter-integrated circuit | SPI stands for serial peripheral interface | The CAN stands for controller area network |
| It is implemented by Philips | SPI is developed by Motorola | CAN is developed by Bosch |
| I2C is a half-duplex protocol | SPI is a full-duplex protocol | CAN is a full-duplex protocol |
| Synchronization | Synchronization | Synchronization |
| It is a two-wire protocol like SCL & SDL | It is a four-wire protocol like SCL, MISO, MOSI & SS | It is a two-wire protocol like CANH+ and CAN H- |
| It is a multi-master protocol | It is a single master protocol | It is a multi-master protocol |
| It is used in the circuit board | It is used in the circuit board | It is used in two circuit board |
Communication Protocols in IoT
The IoT based devices are more susceptible to threats. So these security loopholes can be reduced by using the correct protocols. Communication protocols in IoT are types of communication that ensure the finest security toward the data being exchanged among the IoT connected devices.
The connection of these devices can be done through an IP network otherwise a non IP network but, there is a disparity within their power, range & memory used. The connection throughout IP networks is difficult & takes huge memory as well as power from these devices as the range is not a trouble. Alternatively, Bluetooth which is known as non-IP networks needs low power and memory however they have a limitation in the range.
The main benefits of IoT communication protocols are high quality, credibility, interoperability, innovation flexibility & global scalability. IoT protocols are available in two types mainly IoT network protocols and IoT data protocols.
The list of Top 10 IoT Communication Protocols includes the following.
- WiFi
- SigFox
- Bluetooth
- LoRaWAN
- NFC (Near Field Communication)
- Z wave
- Zigbee
- OPC- UA
- Cellular
- MQTT
Data Communication Protocols
Data communication protocols are very significant for communication because they are used for understanding the networks or computers or devices to each other.
These types of protocols use typical rules as well as methods like a common language to interact with computers or networks to each other. For instance, if a user wants to send an e-mail to another, then the user will create the e-mail on his personal computer by including the details along with the message and attachments.
Once the user sends the e-mail, then immediately multiple actions can take place so that the receiver gets the email. The message moves over the network and reaches the recipient. These protocols provide the information on how the note will be enclosed so that it can move over the system, how the receiver computer can verify for errors, etc
PLC Communication Protocols
The following primary communication protocols are used for the PLC as well as other connections of the network which supports through different PLC software products. These protocols mainly depend on the basic three parts like baud rate, length of network & the number of nodes. The list of PLC communication protocols includes the following.
- Profibus
- Interbus
- ControlNet
- ProfiNet
- CompoNet
- DirectNet
- Modbus
- MelsecNet
- EtherCAT
- DF-1 Protocol
- Optomux
- Host Link Protocol
- RAPIENet
- therNet/IP
- Mechatrolink
- PPI- Point to Point
- Ethernet Powerlink
- Multi-Point Interface (MPI)
- Data Highway (DH)
- Actuator Sensor Interface (ASI)
- DeviceNet
- Highway Addressable Remote Transducer Protocol (HART)
- Ethernet Global Data (EGD)
- Factory Interface Network Service Protocol (FINS)
- Open Smart Grid Protocol (OSGP)
- Recommended Standard (RS-232, RS- 422, and RS-485) Protocols
- Bristol Standard Asynchronous Protocol (BSAP)
- Distributed Network Protocol (DNP3)
- Service Request Transport Protocol (SRTP)
- Smart Distributed System Protocol (SDS)
- Process Image Exchange Protocol (PIEP)
Characteristics of PLC Communication Protocols
The standard protocols are used once PLC modules are connected over the network. The different types these protocols mainly supports different speed, distance & the number of connecting devices.
- Ethernet protocol baud rate is 100 Mb/s, length is Few Km and 255 nodes.
- RS-485 baud rate is 10 Kb/s, the length is 1.2 Km, and 32 nodes
- Profibus protocol baud rate is 5-12 Mb/s, the length is 15 Km and 127 nodes.
- RS-232 baud rate is 19.2 Kb/s, the length is 10m and 1 node
- MPI protocol baud rate is 19.2- 38.4 Kb/s, the length is 50 m and 32 nodes.
- PC Adapter baud rate is 9600 Kb/s, length is 15 m, and 1 node
- PPI protocol baud rate is 187.5 Kb/s, the length is 500 m, and 1 node.
- USB Adapter baud rate is 57.6 Kb/s, the length is 10 m and 1sec
- DH protocol baud rate is 230.4 Kb/s, the length is 3.048 Km, and 64 nodes
- Device Net protocol braud rate is 500 Kb/s, the length is 0.487, and 64 nodes
- Control Net protocol baud rate is5 Mb/s, the length is 30 Km
Communication Protocols in Cloud Computing
The cloud supports two communication protocols for communication as well as connection like MQTT and HTTP. The communication of these devices can be done through Cloud IoT Core across a bridge either the HTTP or the MQTT. These bridges are central components in Cloud IoT Core. Once you create a registry of a device, then you can choose protocols to allow HTTP, MQTT, etc. The standard protocol like MQTT is used frequently and it is supported through embedded devices. This protocol is common in the interactions of the machine to machine.
HTTP is a connectionless protocol, so devices do not maintain a connection to the cloud IoT core. As an alternative, they send requests as well as get responses. The protocols of cloud computing are a set of rules that permit two electronic elements to unite as well as exchange the data with each other. It is mainly used for communication, storage, encryption, networks, decryption, security, management of user login, etc. Some cloud computing protocols include
- Gossip Protocol
- MTP (Media Transfer Protocol)
- CLNP (Connection Less Network Protocol)
- CEE (Coverage Enhanced Ethernet Protocol)
- SRP (State Routing Protocol)
- SSHP (Secure Shell Protocol)
- IGMP (Internet Group Management Protocol)
Thus, this is all about an overview of communication protocols, types, differences between inter-system protocol and intrasystem protocol. Here is a question for you, what are Arduino communication protocols?
Techopedia Explains Communication Protocol
Before successful transmission can take place, networked communications devices have to agree on many physical aspects of the data that is to be exchanged. Rules defining data transmissions are called “protocols.”
There are many properties of a transmission that a protocol can define. For example, properties addressed with protocols may include:
- Packet size.
- Transmission speed.
- Error correction types.
- Handshaking and synchronization techniques.
- Address mapping.
- Acknowledgment processes.
- Flow control.
- Packet sequence controls.
- Routing.
- Address formatting.
Popular protocols include: File Transfer Protocol (FTP), TCP/IP, User Datagram Protocol (UDP), Hypertext Transfer Protocol (HTTP), Post Office Protocol (POP3), Internet Message Access Protocol (IMAP), Simple Mail Transfer Protocol (SMTP).
More About Communications Protocols
In a largely unregulated digital environment, communications protocols create rules.
For example, on the Internet, the types of communications protocols created by groups like the World Wide Web Consortium or W3C and the Internet engineering task force or IETF help to provide universal operations and limit various kinds of liability and vulnerabilities in these technologies.
One good example is authentication protocols. The authentication protocols work against things like distributed denial of service (DDoS) attacks and other common methods by which errant hackers can hobble vast networks or compromise or confuse network traffic.
When HTTP becomes HTTPS or the widespread use of SSL certificates becomes the norm, this is what’s intended by those establishing those types of communications protocols. The protocols work to “harden” systems against various kinds of abuse inherently, and that’s a big part of their value.
Other communications protocols govern the use of data packets in global network trajectories, which for its part sometimes resembles particle physics. It’s not like an open faucet where you just have a free stream of information flowing from one point to another.
Between the sender and receiver, the message consists of granular, discrete units, where each individual data packet has its own header, core information and routing trajectory. All of this has to be synchronized and choreographed in detailed ways, and that’s where communications protocols have such a powerful reach and such an important role.
In addition, the communication protocols that are used depend on the underlying technology itself. So as the technology advances, so do the protocols. That’s why you’ll see Internet protocols evolving into successive versions of themselves, and why we’ll likely see much different communication protocols in tomorrow’s advancing networks.
The Internet of Things promises to drive demand for new evolving communications protocols as ever wider sets of devices get connected to a global network.
ICT Communication Protocols
ICT Communication Protocols
ICT Communication Protocols
ICT Communication Protocols
ICT Communication Protocols
ICT Communication Protocols
ICT Communication Protocols
ICT Communication Protocols
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