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Tech

[Discussion] Understanding carrier aggregation in LTE-Advanced mobile network

2019-06-01 10:26:02
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In this thread, I will try to discuss in layman's term the working theory of carrier aggregation which is introduce in LTE-A or LTE advanced protocol.

First, let us define some technical word being used in this thread:
  • LTE-A means LTE  advance,  the new enhanced protocol of LTE being approve by 3GPP
  • 3CA means 3 carrier aggregation component
  • FDD means Frequency Division Duplex
  • TDD means Time Division Duplex
  • PCC means primary component carrier
  • SCC means secondary component carrier


Carrier aggregation is introduced in LTE advanced network with the purpose to increase mobile network data rates, to reduce mobile network latency, and to increase mobile network bandwidth capacity. To better understand this, let's think of a highway with five or more lanes in it and several cars are travelling in its lane. In carrier aggregation a highway could be a component carrier in its speciifc frequency band example FDD 2600MHz, lanes are the band channels and cars are the packets. An LTE-A phone can be connected to PCC and to SCC, booth component carrier is divided into different channels to better handle data packets. If PCC is congested then data packets will be rerouted to SCC in this way data loss will be avoided. The number of downllink and uplink channels in FDD and TDD varries differently thus increasing the downlink data rates from a standard 150Mbps to 300Mbps.

Let's try to read some mobile network notation, example LTE-A 3CA 600Mbps/150Mbps this is read as LTE advanced 3 component carrier aggregation or 1 PCC and 2 SCC with 300Mbps downlink and 50Mbps uplink. This is why it is very important to determine LTE modem specification of every phone to determine if it is capable of a high speed mobile internet.

So what do you think about this article? Do you think this is informative? Let us know in the comment section below. Adios!

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2019-06-01 10:26:02
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Thanks for this technological share bro. Keep up the good work!
2019-06-03 05:14:06

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napitac | from Mi A2 Lite

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Thanks for this useful information.
2019-06-08 05:33:33
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