We have collected some background on QUIC Streams and QUIC Datagrams which are both available in NICE DCV high-end remote desktop to enable highly interactive remote desktop streaming also in case of high latencies:
QUIC Streams:
- Reliable Transmission: QUIC streams provide a reliable transmission mechanism. Data sent over a QUIC stream is guaranteed to arrive at the destination without corruption and in the order it was sent, similar to TCP.
- Ordered Delivery: QUIC streams ensure that data is delivered in the order it was sent. This is crucial for certain types of data, like files or HTML documents, where order matters.
- Flow Control: Each stream in QUIC is flow-controlled independently. This means that a receiver can apply back-pressure on a per-stream basis, preventing a sender from overwhelming it with too much data.
- Multiplexing: Multiple streams can be multiplexed over a single QUIC connection. This allows for efficient use of the connection, reducing the overhead and latency associated with establishing multiple connections.
- Use Case: Ideal for scenarios where data integrity and order are critical, such as web page loading, file transfers, and API calls.
QUIC Datagrams:
- Unreliable Transmission: QUIC datagrams provide an unreliable transmission mechanism. This means there’s no guarantee that data sent will arrive or that it will arrive in the order it was sent.
- Unordered Delivery: There is no inherent ordering in the delivery of datagrams. Each datagram is independent of the others.
- No Flow Control: Datagram transmission is not flow-controlled. This makes them suitable for use cases where it’s okay to lose some data, and it’s more important to minimize latency.
- Efficiency in Specific Scenarios: They are efficient for use cases where transmission speed is more critical than reliability, such as real-time video or audio streaming, gaming, or live broadcasting.
- Use Case: Ideal for scenarios where low latency is more important than reliable delivery, and the application can tolerate some degree of data loss.
Summary:
- QUIC Streams are used when reliability and ordered delivery are important. They’re similar to TCP but without head-of-line blocking issues and with better multiplexing capabilities.
- QUIC Datagrams are used for cases where speed and low latency are crucial, and some data loss is acceptable. They are more similar to traditional UDP.
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