5G NR Numerology and Frame Structure
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- เผยแพร่เมื่อ 26 ก.ค. 2023
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5G Frame Structure: Learn to Navigate the 5G Frame and Channels This explains all the 5G NR Physical Channels along with their basic functions. This is important to understand because these channels serve as a main building block in understanding all the other 5G topics. In this video we discuss four main areas: 5G NR Numerology, Frames, Slots and Symbols, NR Time Unit and NR Cyclic Prefix. This video has been taken from our 5G course, which focuses on 5G Phase 1. In so doing, both SA (Standalone) and NSA (Non Standalone) operation are discussed. The course details all aspects, from the physical layer channel and reference signals, through to scheduling and analysis of NR RRC signalling utilized to configure the NR air interface.
G NR Frame Structure (Multiple Numerology) Numerology - Subcarrier Spacing Comparing to LTE numberology (subcarrier spacing and symbol length), the most outstanding diffrence you can notice is thet NR support multiple different types of subcarrier spacing (in LTE there is only one type of subcarrier spacing, 15 Khz). The types NR numerology is summarized in 38.211 and I converted the table into illustration to give you intuitive understanding of these numerology. As you see here, each numerology is labled as a parameter(u, mu in Greek). The numerology (u = 0) represents 15 kHz which is same as LTE. And as you see in the second column the subcarrier spacing of other u is derived from (u=0) by scaling up in the power of 2. Radio Frame Structure As described above, in 5G/NR multiple numerology(waveform configuration like subframe spacing) are supported and the radio frame structure gets a little bit different depending on the type of the numerology. However, regardless of numerology the length of one radio frame and the length of one subfame is same. The length of a Radio Frame is always 10 ms and the length of a subframe is always 1 ms. Then what should get different to accomondate the physical property of the different numerology ? The anwer is to put different number of slots within one subfame. There is another varying parameter with numerology. It is the number of symbols within a slot. However, the number of symbols within a slot does not change with the numberology, it only changes with slot configuration type. For slot configuration 0, the number of symbols for a slot is always 14 and for slot configuration 1, the number of symbols for a slot is always 7. Now let's look into the details of radio frame structure for each numerology and slot configuration. Normal CP, Numerology = 0 In this configuration, a subframe has only one slot in it, it means a radio frame contains 10 slots in it. The number of OFDM symbols within a slot is 14. Normal CP, Numerology = 1 In this configuration, a subframe has 2 slots in it, it means a radio frame contains 20 slots in it. The number of OFDM symbols within a slot is 14. Normal CP, Numerology = 2 In this configuration, a subframe has 4 slots in it, it means a radio frame contains 40 slots in it.
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The 3GPP, LTE, LTE-Advanced, and 5G logos are the property of Third Generation Partnership Project (3GPP). The content of this video is based on 3GPP/LTE specifications which are available at www.3gpp.org.
Reference/Source : 3GPP/Award Solution/TH-cam videos/youtube screenshots
5G NR requires an entirely new frame structure to support these diverse needs. In this video, wireless technology manager, Mr. Gaurav Goyal , explains the key aspects behind this new technology.
In this video we discuss four main areas: 5G NR Numerology, Frames, Slots and Symbols, NR Time Unit and NR Cyclic Prefix. This video has been taken from our 5G Air Interface course, which focuses on 5G Phase 1. In so doing, both SA (Standalone) and NSA (Non Standalone) operation are discussed. The course details all aspects, from the physical layer channel and reference signals, through to scheduling and analysis of NR RRC signalling utilized to configure the NR air interface.
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For a long time i have been searching for a good 5G platform, where i can learn the basics in an easier way. This is it, Thanks Gaurav!
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Thank you so much Gaurav Sir for this 5G video.
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Ur teaching skills are really appreciable.
Hope will meet 1 day , after becoming great personality like you.
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Love and Respect from New York, much awaited 5G training. there are several playlists and e-books available on internet but trust me I was waiting you to teach us. you are a great society contributor, a lot of Blessings for you Gaurav Sir. and big fat thanks to you
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In terms of detail and structure, such a training really helped to revolutionize my concepts on detailed mathematical calculations in RB. The different sub carrier spacing in 5G is something designed to achieve a low latency and high throughput. Thanks a lot, 5G Guru.
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Thanks a lot !! It means a lot to me .Please click on above link to get complete PDF copy.
good work
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34:40 Number of RBs will not be the same for 20MHz LTE and NR. It is 100 and 106 respectively (assuming NR numerology 0)
yes you are right.Thanks a lot !! LTE has efficiency of 90 % so effectively only 18 MHZ out of 20 MHz can be utilized