QCI 8 and QCI 9 are both used for non-guaranteed bit rate (non-GBR) services in LTE networks, meaning they do not have guaranteed data rates. The main difference between the two lies in their priority levels and the type of services they support. QCI 8 has a higher priority compared to QCI 9, making it more suitable for services that require slightly better latency and packet loss performance, such as video streaming. QCI 9, on the other hand, is typically used for best-effort services like web browsing and email, where latency and packet loss are less critical.
What is QCI 9 in LTE?
QCI 9 in LTE is a Quality of Service Class Identifier used for background, non-GBR services. This QCI is commonly assigned to low-priority applications, such as file downloads, web browsing, or email, where latency and packet loss are not as critical as in real-time communication. QCI 9 is designed to handle services that can tolerate delays and do not require immediate delivery, ensuring that more urgent data, such as voice or video, can be prioritized over the network.
QCI levels refer to the different Quality of Service Class Identifiers used in LTE networks to classify and prioritize traffic. Each QCI level corresponds to a specific set of network performance characteristics, such as latency, packet loss rate, and guaranteed bit rate (GBR) or non-GBR status. The levels range from QCI 1, which is typically used for real-time voice services with strict requirements, to QCI 9, which is used for background data services with less stringent requirements. The assignment of QCI levels allows the network to manage resources efficiently and provide the appropriate quality of service for each type of traffic.
QCI value in VoLTE refers to the specific QCI level assigned to voice services over LTE. In VoLTE, the QCI value is usually set to 1, which is designated for conversational voice. This QCI value ensures that voice traffic receives high priority with low latency and minimal packet loss, providing the necessary quality for clear and uninterrupted voice communication. The use of a specific QCI value for VoLTE is critical for maintaining call quality and ensuring that voice services perform reliably on the LTE network.
The range of QCI typically spans from 1 to 9 in LTE networks, where each value corresponds to a different level of service quality. QCI 1 is used for services with the highest priority, such as real-time voice calls, while QCI 9 is used for the lowest priority services, such as background data. The range of QCI values allows for the classification and prioritization of various types of network traffic, ensuring that high-priority services receive the resources they need for optimal performance, while lower-priority services are handled in a best-effort manner.
