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802.19 is a wireless communication standard developed by the IEEE that defines wireless communication schedulers, coordination techniques, and channel access methods. This standard can be used for a variety of applications, such as Industrial Internet of Things (IIoT) systems, wireless networks for communications between products in the retail and healthcare industries, as well as other scenarios where reliable and timely communications are required. This article will discuss the application field and working principle of 802.19.

Application fields: In the most general sense, 802.19 can be used in any application where wireless communications are desired. This includes the IIoT space, as 802.19 provides a reliable and efficient way to connect various types of sensors and nodes to communicate with each other. In addition, 802.19 can be used to create networks between whole buildings, or between multiple locations, allowing for easy management and control. Additionally, the standard could be used in the retail and healthcare sectors, for instance, to allow for the communication between various products and devices, such as RFID tag readers, medical equipment, and other consumer products.

In addition, 802.19 can be used to create networks in various industrial setting, where factory communication needs to be reliable and timely. This can be used to manage product lines in various stages of production, as well as to monitor output and manage various parts of a production line. Additionally, due to the increased reliability and efficiency of 802.19, it is becoming a more popular option in the automotive industry, where communication between various systems, such as driver assistance and navigation systems, need to be both reliable and timely.

Working principle: 802.19 is based on an IEEE 802.15 scheduling system, which defines the rules that govern how devices communicate with each other. The basic principle of the scheduling system is that each device must send out a signal that indicates its open time and communication channel. All other devices that receive the signal can then choose to send a response on the open channel. The scheduling system also allows devices to send out multiple signals, allowing for multiple connections at once.

To ensure reliable and timely data transfer, 802.19 also includes packet fragmentation and reassembly. In this process, the sender divides a single large packet into multiple smaller packets and transmits them in order. The receiver then reconstructs the packet from the multiple smaller packets. This ensures that the data is sent reliably, even if one or more packets are lost during transmission.

The use of acknowledgments is also critical to ensure the reliability of 802.19 networks. After any transmission, the device transmitting the data must receive a response from the receiver acknowledging that the data was received. This helps to ensure that the data was sent correctly, and if it was not received correctly, the sender can then retransmit the data.

Finally, 802.19 also utilizes a channel access mechanism, which is known as the Contention Period. During the Contention Period, any device can transmit data, as long as the channel is not blocked by another device. When two or more devices attempt to access the same channel, a priority system is utilized in order to determine which device will be able to access the channel data.

In conclusion, 802.19 is a reliable and efficient wireless communications standard. It can be used in a variety of applications, from IIoT systems to the retail and automotive industries. It is based on an IEEE 802.15 scheduling system and utilizes packet fragmentation and acknowledgments to ensure reliable and timely data transfer. Finally, a channel access mechanism is used in order to control which devices can access the communications channel.

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