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Do you know how a full-duplex system can achieve simultaneous calls?
In today's world of digital communications, full-duplex systems have become an integral part of our daily lives. The design of the full-duplex system allows both parties to conduct two-way communication at the same time, whether during phone calls, video conferences, or various network communication situations. So, how exactly do they achieve this?
Full-duplex system means that both parties can conduct two-way communication at the same time, which makes the call process more natural and interactive.
The difference between full duplex and half duplex
The main difference between Full Duplex and Half Duplex systems is the bidirectional nature of communication. Full-duplex systems allow both parties to send and receive information simultaneously, while half-duplex systems require one party to pause reception during transmission. For example, a traditional telephone call is a full-duplex system, where both parties can speak and hear each other at the same time. In contrast, walkie-talkies are half-duplex systems, in which the user must press a button to send a message.
Full-duplex systems use technology to ensure that each user can transmit and receive information simultaneously, eliminating waiting time.
Technical basis of full-duplex
Full-duplex systems usually rely on some key technologies, such as echo cancellation technology. When communication occurs, the sound from the far end may be transmitted back to the microphone, forming an echo, which is very annoying to the user. In order to solve this problem, echo cancellation technology processes the sound signal and filters out the echo part, thereby enhancing the quality of the call.
Different full-duplex implementations
Full-duplex systems can be implemented in two main ways: frequency division duplex (FDD) and time division duplex (TDD).
Frequency Division Duplex (FDD)
Frequency division duplex involves using different frequencies for simultaneous upstream and downstream communications. This is widely used in many wireless communication systems, such as in mobile phone communications. The benefit of this approach is that it greatly reduces interference and increases the efficiency of communications.
Time Division Duplex (TDD)
Time-division duplex, on the other hand, achieves two-way communication by allocating different time periods in time. This technology dynamically adjusts communication capacity in each direction to cope with asymmetric data traffic demands. In situations where data traffic is low, the system can allocate more resources to one party and adjust accordingly during times of traffic spikes.
The use of these two technologies enables the full-duplex system to demonstrate great flexibility and adaptability under different communication requirements.
Full-duplex application cases
Full-duplex systems have a wide range of applications. The most common example of this is undoubtedly telephone communication. Whether it's a landline or a mobile phone, both parties can exchange information smoothly during the call.
In data communications, many Ethernet connections also use full-duplex operation, allowing files to be uploaded and downloaded at the same time, greatly improving the overall performance of the network. In addition, in the video conferencing system, the use of full-duplex communication technology allows participants to communicate as naturally as face-to-face, further improving work efficiency and interactivity.
Future Outlook
With the advancement of science and technology, the development of full-duplex communication systems will be further promoted. Especially in 5G and future 6G technologies, full-duplex technology will play a more important role to support the growing data traffic and diverse application requirements.
In summary, the core of a full-duplex system is its ability to achieve simultaneous two-way communication, which not only improves the efficiency of communication, but also shortens the distance between people. Think about it, have our daily communications become more convenient due to the advancement of these technologies, and will there be more innovations in the future?
