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Mini Slots In Nr
5G NR Slot Formats 5G NR slot format combination
Mini-slots are not only useful for low-latency applications, but they also play an important role in LTE-NR coexistence and beamforming. Slots can be DL, UL, or flexible. NR slot structure allows for dynamic assignment of the link direction in each OFDM symbol within the slot. With this, the network can dynamically balance UL and DL traffic. Dec 25, 2017 The number of slots in a subframe depends on the numerology μ. Number of OFDM symbols per slot, slots per frame, and slots per subframe for normal cyclic prefix. (Credit: 3GPP TS 38.211 V15.1.0.
This page mentions 5G NR Slot Formats tables. It describes 5G NR slot format combination structures defined in 5G NR 3GPP TS 38.200 series standards
Scalable 5G NR slot duration for diverse latency/QoS 1. As low as two symbols per mini-slot; 2. Symbols across numerologies align at symbol boundaries and transmissions span an integer # of OFDM symbols 14 OFDM symbols per slot with mini-slot (2, 4, or 7 symbols) for shorter transmissions1 Supports slot aggregation for data-heavy transmissions.
5G NR Slot Formats
Abbreviations used in the table.
D: Downlink Symbol
X: Flexible Symbol
U: Uplink Symbol
5G NR Reference document
• 3GPP TS 38.200 series of documents
5G NR Numerology 5G NR Terminology
• 5G NR PHY timing unit • 5G NR SLIV • 5G NR Mini Slot • 5G NR Bandwidth Part • 5G NR CORESET • 5G NR DCI Formats • 5G NR UCI • 5G NR slot formats • 5G NR RRC IEs • 5G NR RSRP RSRQ SINR
5G NR Control channels 5G NR Traffic Channels 5G NR Reference Signals and sequences
• 5G NR SSB, SS, PBCH • 5G NR PRACH • 5G NR PDCCH • 5G NR PUCCH • 5G NR Reference Signals • 5G NR m-Sequence • 5G NR Gold Sequence • 5G NR Zadoff Chu Sequence
5G TECHNOLOGY RELATED LINKS
This 5G tutorial also covers following sub topics on the 5G technology:
5G basic tutorial
5G Frequency Bands
5G millimeter wave tutorial
5G mm wave frame
5G millimeter wave channel sounding
Difference between 4G and 5G
5G testing and test equipments
5G network architecture
5G NR Physical layer
5G NR MAC layer
5G NR RLC layer
5G NR PDCP layer
What is Difference between
difference between FDM and OFDM
Difference between SC-FDMA and OFDM
Difference between SISO and MIMO
Difference between TDD and FDD
Difference between 802.11 standards viz.11-a,11-b,11-g and 11-n
OFDM vs OFDMA
CDMA vs GSM
Bluetooth vs zigbee
Fixed wimax vs mobile
wibro vs mobile wimax
Microcontroller vs microprocessor
RF and Wireless Terminologies
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What is 5G NR Mini-slot Function of Mini-slot in 5G NR
This page mentions 5G NR Mini-slot basics including function of Mini-slot.The difference between slot and mini-slot in 5G NR is also mentioned.
Mini Slots In Nra
Introduction:
As shown in the figure-1, a frame in 5G NR consists of 10 ms duration.A frame consists of 10 subframes with each having 1ms duration similar to LTE.Each subframe consists of 2μ slots.Each slot can have either 14 (normal CP) or 12 (extended CP) OFDM symbols.
Slot is typical unit for transmission used by scheduling mechanism.NR allows transmission to start at any OFDM symbol and to last only as many symbolsas required for communication. This is known as 'mini-slot' transmission.This facilitates very low latency for critical data communication as well asminimizes interference to other RF links.Mini-slot helps to achieve lower latency in 5G NR architecture.Table below mentions typical fixed slots used in a 5G NR frame structure.
| μ, (subcarrier spacing) | Slots/slot | Slots/subframe | Slots/frame | Slot duration |
|---|---|---|---|---|
| 0 (15 KHz) | 14 | 1 | 10 | 1 ms |
| 1 (30 KHz) | 14 | 2 | 20 | 500 µs |
| 2 (60 KHz), normal CP | 14 | 4 | 40 | 250 µs |
| 2 (60 KHz), Extended CP | 12 | 4 | 40 | 250 µs |
| 3 (120 KHz) | 14 | 8 | 80 | 125 µs |
| 4 (240 KHz) | 14 | 16 | 160 | 62.5 µs |
Unlike slot, mini-slots are not tied to the frame structure.It helps in puncturing the exising frame without waiting to be scheduled.
Difference between slot and mini-slot in 5G NR
➤As mentioned normal slot occupies either 14 (normal CP) or 12 (Extended CP) OFDM symbols.It enables slot based scheduling. One slot is the possible scheduling unit and slot aggregation is also allowed.Slot length scales with subcarrier spacing.
• Slot length = 1 ms/2μ,
➤Mini-slot occupies 2, 4 or 7 OFDM symbols. It enables non-slot based scheduling.It is minimum scheduling unit used in 5G NR. As mentioned mini-slots can occupy as little as 2 OFDM symbols and are variable in length.They can be positioned asynchronously with respect to the beginning of a standard slot.
5G NR Numerology 5G NR Terminology
• 5G NR PHY timing unit • 5G NR SLIV • 5G NR Mini Slot • 5G NR Bandwidth Part • 5G NR CORESET • 5G NR DCI Formats • 5G NR UCI • 5G NR slot formats • 5G NR RRC IEs • 5G NR RSRP RSRQ SINR
5G NR Control channels 5G NR Traffic Channels 5G NR Reference Signals and sequences
• 5G NR SSB, SS, PBCH • 5G NR PRACH • 5G NR PDCCH • 5G NR PUCCH • 5G NR Reference Signals • 5G NR m-Sequence • 5G NR Gold Sequence • 5G NR Zadoff Chu Sequence
5G TECHNOLOGY RELATED LINKS
Mini Slots In Nro
This 5G tutorial also covers following sub topics on the 5G technology:
5G basic tutorial
5G Frequency Bands
5G millimeter wave tutorial
5G mm wave frame
5G millimeter wave channel sounding
Difference between 4G and 5G
5G testing and test equipments
5G network architecture
5G NR Physical layer
5G NR MAC layer
5G NR RLC layer
5G NR PDCP layer
What is Difference between
Mini Slots In Nr 49
difference between FDM and OFDM
Difference between SC-FDMA and OFDM
Difference between SISO and MIMO
Difference between TDD and FDD
Difference between 802.11 standards viz.11-a,11-b,11-g and 11-n
OFDM vs OFDMA
CDMA vs GSM
Bluetooth vs zigbee
Fixed wimax vs mobile
wibro vs mobile wimax
Microcontroller vs microprocessor
RF and Wireless Terminologies
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