#full-duplex

أعلنت شركة إي آند مصر، عن تحقيق إنجاز عالمي غير مسبوق يتمثل في الإطلاق العالمي الأول لهوائي Uranus MB² متعدد الحزم ومتعدد النطاقات، والذي تم تطويره بالتعاون مع شركة هواوي مصر. يمثّل هذا الابتكار نقلة نوعية في تكنولوجيا التراسل، إذ يعيد تعريف قدرات نقل البيانات بكفاءة أعلى، ويدعم مسيرة التحول الرقمي الوطني في مصر. حلّ مبتكر للتحديات الهيكلية وتسريع نشر الشبكات يوفّر هوائي Uranus MB² قدرات جديدة…

أعلنت ڤودافون مصر عن إنجاز عالمي جديد بالتعاون مع هواوي مصر وتحت إشراف قطاع الطيف الترددى بالجهاز القومي لتنظيم الاتصالات (NTRA) حيث تم اختبار أول وصلة ميكروويف تجارية في العالم بسرعة 50 جيجابت /ثانية ضمن حيز ترددات E-Band باستخدام تكنولوجيا Full-Duplex المتطورة. تُعد وصلة الميكروويف المتقدمة، التي تعمل في ترددات E-Band(80 جيجا هرتز)، معيارًا جديدًا في السعة والأداء، حيث تتيح نقل البيانات بسرعة…

NiceRF has newly launched the SA618F30-FD, an 8-channel full-duplex wireless data communication module capable of handling up to 8 transmitters simultaneously without interference. It is designed for scenarios where multiple transmitters operate simultaneously in complex environments, minimizing the need for retransmissions and greatly reducing the chances of interference or being interfered with. The module combines LoRa modulation with 1W output power and features a low-power design for receiving and sleep modes, making it ideal for long-distance wireless IoT applications.

The SA618F30-FD full-duplex data transmission module integrates a high-speed microcontroller, high-performance RF transceiver chip, and power amplifier. It offers a standard serial port for easy communication with the module, allowing users to quickly set module parameters and control transmission and reception functions. Users simply need to connect the module to a serial port to achieve data transmission. Its ultra-compact size also allows for easy integration into various handheld devices.

Technical Specifications of SA618F30-FD

 Frequency Band 410~490MHz (Customizable 150-960 MHz)

 Up to 8 devices can transmit simultaneousl (no limit on reception)

 Echo cancellation function

8-way dynamic changes

Support OTA &Serial upgrade

3-4KM transmission distance in the open area

 High reception sensitivity: -117 dBm

Highly integrated and compact size

Core Advantages of the SA618F30-FD Full-Duplex Data Transmission Module:

The SA618F30-FD module introduces a new full-duplex feature, allowing simultaneous data transmission and reception, making the communication process more efficient. In traditional half-duplex communication, transmission and reception must alternate, but full-duplex eliminates this limitation, enabling continuous, real-time communication.

Full-Duplex Communication with 8-Channel Concurrent Operation (without Interference): Supports 8-channel concurrent communication where the receiving end is unrestricted, greatly reducing the likelihood of retransmission. Multiple transmitters can operate simultaneously without interference, ensuring seamless connection and smooth operation even when multiple sources are transmitting data at the same time.

Low Latency: The module is optimized for minimal transmission delay. Compared to other half-duplex data transmission modules, the full-duplex module achieves a latency rate of less than 50ms. 

Long-Range, Low-Power Communication: The SA618F30-FD utilizes LoRa modulation technology, combined with 1W output power, enabling transmission distances of 3-4 kilometers in open environments. Its low-power design ensures efficient performance in both receiving and sleep modes.

ESD Protection: Built-in electrostatic discharge (ESD) protection prevents damage caused by static electricity, enhancing the durability and stability of the module.

Customizable AES Encryption: Users can customize AES encryption functionality based on their needs to enhance the security of data transmission.

Dynamic 8-Party Changes: The module allows up to 8 people to communicate simultaneously, with the added flexibility of allowing participants to join or leave the conversation at any time, providing users with great adaptability.

Other Features of the SA618F30-FD Full-Duplex Data Transmission Module:

Efficient Transmission Performance

The SA618F30-FD utilizes advanced LoRa modulation technology, combined with 1W output power, achieving a transmission distance of up to 3-4 kilometers in open environments. The module also boasts a high reception sensitivity of -117 dBm, ensuring stable data reception even under weak signal conditions.

High Integration and Low Power Consumption Design

The module integrates a high-speed microcontroller, high-performance RF transceiver chip, and RF power amplifier, creating a highly integrated design that significantly reduces system size and cost. Additionally, the SA618F30-FD's low power consumption design ensures energy efficiency during long-term operation, extending the device's lifespan.

Flexible Configuration and Upgrades

The SA618F30-FD module offers a standard serial port, allowing users to quickly configure module parameters and control its transmission and reception functions through a simple serial connection. Moreover, the module supports OTA (Over-the-Air) and serial upgrades, enabling users to easily expand functionality and optimize performance without hardware changes.

Multiple Protections, Robust and Durable

The module features built-in ESD electrostatic protection and both software and hardware crash protection mechanisms, enhancing its durability and stability to withstand various harsh environments.

Application Areas of the SA618F30-FD Module:

AGV (Automated Guided Vehicles): In AGV systems, the low-latency full-duplex data transmission capability ensures real-time communication between the AGV and the control center.

Tower Crane Systems: For tower crane operations, the high-power and long-distance communication capabilities ensure the real-time and reliable control of the crane. The full-duplex function allows operators to simultaneously send and receive commands, preventing safety hazards caused by communication delays or interruptions.

Multi-Channel Full-Duplex Data Transmission Applications: In complex scenarios where multiple devices need to communicate simultaneously, the 8-channel concurrent full-duplex functionality is critical, allowing devices to communicate at the same time without interference.

The new product is now available. We welcome users to visit NiceRF official website : www.nicerf.com to learn more about the advantages of the SA618F30-FD module and its innovative technology.

Unlike Ethernet, WiFi is by nature a half-duplex medium. The half-duplex constraint applies to devices that share a relative physical area and RF frequency. Several mechanisms within the 802.11 protocol minimize the likelihood of frame collision and define the appropriate response in the event that a collision is inferred. 

The main mechanism is Carrier Sense Multiple Access with Collision Avoidance (CSMA/CA). An asynchronous message passing mechanism, delivering best effort service without any bandwidth or latency guaranty. 

By manually directing traffic flows we can improve the performance of the wireless links, and create full-duplex (like) behavior.

The concept is to cause the traffic from one side to use link A and the traffic going the other way to use link B. If either link fails, the traffic will automatically fail-over and use the working link. In the configuration example below an implementation using OSPF, the configuration will cause traffic from the router at Building 1 to use Link A (lower cost on fa0/0). And will cause traffic from the router at Building 2 to favor Link B (lower cost on fa1/0).

Router at Building 1:

! interface FastEthernet0/0 description ### Link A ### ip ospf 1 area 0 ! interface FastEthernet1/0 description ### Link B ### ip ospf 1 area 0 ip ospf cost 100 ! router ospf 1 router-id 1.1.1.1 !

Router at Building 2:

New Post has been published on http://www.mf200.cf/transmissao-de-dados/

TRANSMISSÃO DE DADOS

Os canais através dos quais os sinais são enviados numa rede podem operar num dos seguintes três modos: SIMPLES, HALF-DUPLEX e FULL-DUPLEX, a diferença entre eles reside no modo como o sinal “viaja”.

TRANSMISSÃO SIMPLEX

Este é um modo de transmissão em uma só direcção. Tal como o nome indica é uma transmissão simples, também chamada de unidireccional.

As aplicações para circuitos simplex, embora raras, ainda se encontram, tais como os leitores de cartões ou mesmo alguns sistemas de segurança como os alarmes de fogo ou fumo. Este tipo de transmissão apesar de não ser muito prático tem vantagens de ser bastante económico.

TRANSMISSÃO HALF-DUPLEX

A transmissão half-duplex é um aperfeiçoamento do modo simplex, pois o tráfego é efectuado nos dois sentidos, no entanto essa transmissão não é simultaneamente bidireccional, isto é, somente um dos lados pode transmitir tendo o outro que esperar que a linha fique livre. Neste tipo de transmissão operam, por exemplo, os rádios FM ou os serviços de emergência.

Os modems também são dispositivos hal-duplex, ao receberem e transmitirem dados, mas não ao mesmo tempo, no entanto, é possível criar um modem full-duplex se usarmos dois modems e duas linhas telefónicas.

TRANSMISSÂO FULL-DUPLEX

No caso da transmissão full-duplex as coisas já se passam de outra maneira: a comunicação é simultânea nos dois sentidos e um dos exemplos mais significativos é a linha telefónica, já que os dois intervenientes numa conversação podem fazê-lo simultaneamente.

A tecnologia full-duplex nas redes de dados permite um aumento significativo da performance já que os dados podem ser enviados e recebidos em simultâneo. A DSL, por exemplo, os utilizadores podem carregar dados e simultaneamente usar a mesma linha para falar ao telefone.