From the course: 4G LTE: Architecture, Protocols, Call Flows, KPIs, Optimization, Performance Analysis

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Default bearer vs. dedicated bearer: LTE

Default bearer vs. dedicated bearer: LTE

From the course: 4G LTE: Architecture, Protocols, Call Flows, KPIs, Optimization, Performance Analysis

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Default bearer vs. dedicated bearer: LTE

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Not all data is created or treated equally in the network. A text message doesn't need the same priority or speed as a live video call. So how does the network know how to treat your data? The secret is in the first data tunnel it builds, which is termed as the default EPS Bureau. Let's look inside a real drive test log to see the service profile the network assigns to a user. The default bearer setup message is like a service contract. It defines the quality and limits for your basic data connection. The most critical parameter here in this case is QCI, which is QoS class identifier. So QoS is quality of service in this case. If we look into the default bearer and we look into the logs, we'll find that the first bearer that is being made here in this case is QCI 6. Now this identifier or number is a code that tells every network node the priority, the packet delay budget and the error loss rate for this pairer for this particular user. We have different QCIs like QCI 5 which is…

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