Cyclic Prefix length of 5G NR Frame Structure?

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Sukshith Shetty
Sukshith Shetty 2022-1-5
Hello,
I was trying to understand the frame structure importance and its requirement along with the cyclic prefix attachment.
I have basic two questions here:
1) Why is a frame structure requires in sending traffic and control signals in 5G/LTE?Can’t we send just series of symbols as it is? Why is a frame structure defined in first place?
2) Why is cyclic prefix for 1st and 7th symbol more when compared to other symbols in the slots. The time/length of cyclic prefix for 1st and 7th symbol is more. Why can’t it be same for all the symbols? What is the purpose.
Thank you

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