Energy Saving Techniques for UE in 5G: RRC States, DRX, and CDRX

In 5G, UE sleeps when there is no data traffic, and wakes up when data arrives in downlink or uplink buffer. This video explains the basics of sleep and wake-up mechanisms using RRC states, DRX, and CDRX.

▬ Contents of this video ▬▬▬▬▬▬▬▬▬▬

0:00 - Introduction
0:18 - RRC States
1:31 - Discontinuous Reception (DRX)
1:35 - Initiating downlink data transmission
3:12 - Initiating uplink data transmission
3:57 - Connected Mode Discontinuous Reception (CDRX)
4:45 - DRX Short Cycle and Long Cycle
5:44 - Event based wake up period extension

References:
1. ETSI TS 138 331, Section 6.3.2
2. ETSI TS 138 304
3. Book: Chris Johnson, "5G New Radio in Bullets", 2019.
4. 5G NR: Connected Mode DRX (http://howltestuffworks.blogspot.com/...)
5. Sharetechnote: 4G/LTE - DRX (https://www.sharetechnote.com/html/Ha...)

Music: Erik SATIE - Gymnopedies 1

#5G, #Wireless, #WirelessCommunication, #CellularCommunication, #DRX, #CDRX, #rrcgroupd

"Correction: 03:31 UE cannot send SR while in RRC idle/inactive state. To change to 'RRC Connected' state, UE has to do a contention-based RACH procedure."