WHAT IS LINK ADAPTION?

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Link Adaptation is about improving modulation and coding scheme (MCS) to reach users in a better way in terms of throughput and data rate, wherever they are standing within the cell coverage. Even if they are standing closer to the cell edge or farther from the cell, eNodeB scheduler will adjust its modulation scheme and/or […]

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What are the agreed state transitions between 2G/3G and LTE?

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The agreed state transitions that will be supported between 2G/3G and LTE are shown in Figure below. The methods to execute the supported state transitions are the following: A) = PDP Context establishment needed, if no PDP context exists. Network controlled, prepared handover, for UEs in connected state Network controlled Cell Change Order (CCO) with […]

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What is the purpose of having Multi-Antenna processing in LTE?

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LTE is supposed to have high data rate and throughput compared to previous technologies. For this reason and purpose LTE supports several different multi-antenna techniques and processing in order to enable high spectral efficiencies in a wide range of scenarios. Mainly there are three multi-antenna processing schemes which run in LTE. There are different flavors […]

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What are the Uplink multi-antenna schemes in LTE?

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Only the downlink in LTE supports multi-antenna processing in the form of spatial multiplexing for a single UE. So far, two multi-antenna related techniques are explicitly supported in the LTE standard for uplink: UE transmit antenna switching In antenna switching, the UE may transmit over either of two transmit antennas. This corresponds to a poor […]

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Centralized Unit – Distributed Unit (CU-DU) Split Base Station | 5G Systems Base Station Architecture

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​There are different base station architecture types specified in 5G Systems (5GS).Standalone Base StationNon-Standalone Base StationCU-DU Split Base Station​In this post, we will talk about Centralized Unit (CU) – Distributed Unit (DU) Split Base station architecture. ​Centralized Unit (CU) and Distributed  Unit (DU) Split Base Station Architecture ​General Structure ​​The general structure of CU-DU split architecture is […]

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