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Wireless networking
Published in Matthew N. O. Sadiku, Optical and Wireless Communications, 2018
CSMA/CA is slightly different from carrier sense multiple access with collision detection (CSMA/CD), which is the MAC protocol used in Ethernet wired LAN. In CSMA/CA, when a node has something to transmit, it waits for silence on the network. When no other nodes are heard, it transmits and waits to receive an acknowledgment from the recipient node. If it fails to receive an acknowledgment within a time period, it assumes that collision has occurred and follows a process similar to that of CSMA/CD. Each node then waits for silence and transmits only after a random amount of waiting. While CSMA/CA protocol is slower than CSMA/CD because of waiting for acknowledgment, it works well for WLANs. Also, WLANs operate in a strong multipath fading channel where channel characteristics can change, resulting in unreliable communication.
Multiple Access Methods for Communications Networks
Published in Jerry D. Gibson, The Communications Handbook, 2018
Carrier sense multiple access with collision detection (CSMA/CD): A CSMA procedure under which each station is also equipped with a mechanism that enables it to determine if its ongoing packet transmission is in the process of colliding with other packets; when a station detects its transmission to collide, it immediately acts to stop the remainder of its transmission. Code-division multiple access (CDMA): A multiple access procedure under which different messages are encoded by using different (orthogonal) code words while sharing the same time and frequency resources.
Network Communication
Published in Jerry C. Whitaker, Microelectronics, 2018
Ethernet, adhering to the IEEE 802.3 standard, is a carrier sense multiple access with collision detection-(CSMA/CD-) based network architecture traditionally installed in a bus configuration, but most often installed in a hub-based star physical topology. Every device, most often network adapter cards, attached to an ethernet network has a unique hardware address assigned to it at time of manufacture. As new devices are added to an ethernet network, their addresses become new possible destinations for all other attached ethernet devices.
Construction of Data Acquisition and Processing System for Diagnostics Based on TSN Fiber Network at ASIPP NBI System
Published in Fusion Science and Technology, 2022
Ling Yu, Yongjian Xu, Xufeng Peng, Wei Liu, Yahong Xie
Generally, the electrostatic probe measurement system is based on the Ethernet protocol for data transmission. The data link layer of the standard Ethernet uses the carrier sense multiple access with collision detection protocol, which cannot guarantee data transmission within a certain time. Unlike traditional Ethernet, Time Sensitive Networking (TSN) is a protocol that works on the physical layer and the data link layer. It communicates based on the time division multiplexing method. It has a set of clock synchronization protocols to ensure that the clock accuracy of the entire network reaches the 1- to 2-μs level and can guarantee the synchronization and low jitter of the transmitted data.