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

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LTE frame structure: How radio resources are arranged

LTE frame structure: How radio resources are arranged

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

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LTE frame structure: How radio resources are arranged

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In LTE, there are different duplex schemes, Frequency Division Duplex and Time Division Duplex. In FTD, think of it like a busy two-way highway. It is having separate lanes for traffic in each direction. It uses separate frequencies for uplink and separate frequencies for downlink. Whereas the time division duplex is like a single lane with traffic lights controlling the flow. It shares one frequency but alternate uplink and downlink in the different time slots. Now which one is better? It depends on the road or in this case it depends on the network's need. We have the different frame structures for both FTD and TDD. Let's start with the FTD. we have frame structure type one where we use the separate frequencies for uplink and downlink. Here it's like a divided highway where there is no collision happening. In the radio frame, in a time and frequency domain, there is one frame of 10 milliseconds. Within that we have 10 different subframes each of 1 millisecond and within that we have…

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