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5G Frame subframe structure possible combinations downlink uplink

This page describes 5G Frame structure used in 5G air interface. It explains possible combinations of 5G subframe structure used in 5G downlink subframe and uplink subframe. It mentions mapping of 5G channels (xPDCCH, xPDSCH, xPUCCH, xPUSCH) and 5G signals (DMRS, SRS) in each of the subframes.

5G frame Structure

5G Frame Structure

The figure-1 depicts 5G frame structure. As shown single radio frame has 10ms duration with 100 slots. Each slot has duration of 0.1 ms. The two consecutive slots make one subframe with total duration of 0.2 ms. There are four types of 5G subframes consisting of downlink subframe and uplink subframe. Possible combinations are shown in the figure-2 below.

5G Subframe Structure Possible Combinations | 5G downlink subframe |5G uplink subframe

5G Subframe Structure possible combinations

The figure-2 depicts possible combinations of 5G subframe structure used in downlink and uplink. Following are the combinations used in a 5G subframe.
a.) DL Control Channel, DL Data Channel
b.) DL Control Channel, DL Data Channel, UL Control Channel
c.) DL Control Channel, UL Data Channel
d.) DL Control Channel, UL Data Channel, UL Control Channel

Both the uplink and downlink share same slot structure. Each slot consists of 7 OFDM symbols in time domain and 100 PRBs (i.e. Physical Resource Blocks) in frequency domain. Each PRB consists of 12 subcarriers with spacing of 75 KHz.

As shown in the figure-2, each of these combinations carry following 5G channels and 5G signals in one subframe ( i.e. in two slots).
➨Combination#1: {xPDCCH, xPDSCH, xPDSCH/DMRS, xPDSCH (11 times) } OR
{xPDCCH (2 times), xPDSCH/DMRS, xPDSCH (11 times) }
➨Combination#2: {xPDCCH, xPDSCH, xPDSCH/DMRS, xPDSCH (9 times), Guard, xPUCCH/SRS } OR
{xPDCCH (2 times), xPDSCH/DMRS, xPDSCH (9 times), Guard, xPUCCH/SRS }
➨Combination#3: {xPDCCH, Guard, xPUSCH/DMRS, xPUSCH (9 times), xPUCCH/SRS (2 times) } OR
{xPDCCH, Guard, xPUSCH/DMRS, xPUSCH (10 times), xPUCCH/SRS }
➨Combination#4: { xPDCCH, Guard, xPUSCH/DMRS, xPUSCH (11 times) }

References:
• TS V5G.201 V1.0
• Verizon 5G TF (Test Plan for Air Interface)

Also refer 5G mm wave frame structure>>.


Frame structure of wireless standards, technologies

Frame structure of various wireless standards/technologies are mentioned below. It include WiMAX, WLAN, Zigbee, GSM, GPRS, UMTS, LTE, TD-SCDMA, GPS, SDH, 11ac WLAN, AMPS, Ethernet, VLAN etc.

WiMAX physical layer Frame Structure as per 802.16d and 802.16e standards
WiMAX MAC layer Frame Structure as per OFDM 802.16d standard
Zigbee RF4CE Frame Structure
Zigbee physical layer Frame Structure
Zigbee MAC layer Frame Structure
GPRS Frame Structure
GPS Frame Structure
LTE Frame Structure
TD-SCDMA Frame Structure
UMTS Frame Structure
SONET Frame Structure
SDH Frame Structure
802.11ac PHY Frame Structure
802.11ac MAC layer Frame Structure
WLAN Frame Structure as per 802.11a,11b,11n,11ac standards
AMPS Frame Structure
Ethernet Frame Structure
VLAN Frame Structure
GSM Frame Structure

5G NR Control and Traffic Channels

5G NR Mini Slot
5G NR Bandwidth Part
5G NR slot formats
5G NR SSB, SS, PBCH
5G NR PRACH
5G NR PDCCH
5G NR PUCCH
5G NR Reference Signals


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

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