The difference between TDD-LTE and FDD-LTE in frequency band allocation, tdd-ltefdd-lte

The difference between TDD-LTE and FDD-LTE in frequency band allocation, tdd-ltefdd-lte

I have previously posted a blog that is used to comparing the similarities and differences between TDD and FDD. After reading this blog, I think we should classify it based on the similarities and differences, so that we can better help you remember and understand it.

So in this section, we will first sort out the difference between the frequency band and the duplex mode.

TDD and FDD are short for Time Division Duplex and Frequency Division Duplex respectively;

The FDD system uses different frequencies for sending and receiving data, and there is a duplex interval between the uplink and downlink frequencies. Currently, in common 2G, 3G networks, GSM, CDMA, WCDMA is a typical FDD system;

The TDD system uses the same frequency for sending and receiving data. When sending upstream and downstream data, the upstream and downstream data are staggered by mistake. In practice, the upstream and downstream data can be staggered to avoid interference. For example, China's independent TD-SCDMA technology is a typical TDD system.

We can see that the FDD-LTE strives to use 1.8G as the preferred frequency, 2.1G as the auxiliary frequency; TDD uses 2.6G as the main frequency;

From the previous comparison, it seems that there is inconsistency between the front and back, the former table compared the frequency band TDD-LTE frequency band is 1-21, the frequency band of the FDD-LTE is 33-41, however, after comparing the frequency chart found in a network, there is a conflict between the two. Let's take a look at this table:

From the table, we can see the data in the column "brand". TDD is 33-43.FDD from 1 to 25.

So in terms of bandwidth allocation between TDD and FDD, how exactly is I allocated?

This is what I haven't figured out yet. I should record it first. If anyone understands it, leave a message to give me some advice.

I still want to write the difference in the duplex mode here. After the configuration, I think the article is a little long, so I will keep the next section.