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Category: Call Flow

5G NR SR – Scheduling Request

Introduction SR also known as Scheduling Request is a very famous word for telecom Dev, Test, and Optimization Engineers. It is a Layer 1 (Physical Layer) signal or message sent […]

August 6, 2022August 6, 2022 Author 5G, 5G MAC, 5G MAC Layer, 5G Physical Layer, Call Flow

Early Paging Indication in 5G NR – EPI Release 17

Introduction 3GPP release 17 for 5G NR, introduced the paging enhancements for UE Power Saving, the enhancement is named as Early Paging Indication (EPI).  In earlier release 15, in high […]

June 9, 2022June 9, 2022 Author 5G Call Flow, Call Flow, NAS Signalling, Signaling

X2 Handover Call Flow in 4G LTE

Introduction In handover process a UE sessions are transferred from the current serving cell to another one while it is moving towards a neighbor cell and UE ends up with […]

March 10, 2022March 10, 2022 Author 5G Call Flow, Call Flow, LTE, RRC Signalling

5G N26 Interface – 5G to 4G Interworking

N26 interface Introduction N26 interface is an interface which interconnects the 5G Core network function AMF with 4G network node MME and enables interworking between 5G to 4G and visa […]

November 29, 2021January 13, 2023 Author 5G, 5G Core, 5G Network Architectures, 5G NR, Call Flow, Interviews, Voice Services, VoNR, Wireless Testing

5G PDU Session and Its Types

Introduction In 5G System, the one of the key task for the networ is to provide the connectivity to UE towards  a Data Network (DN) know as 5G DNN which […]

November 28, 2021November 28, 2021 Author 5G, 5G Call Flow, 5G Core, Call Flow, NAS Signalling, Signaling, Wireless Testing

5G SA Inter gNB Handover – Xn Handover

Introduction Mobility (Handover) in an important feature in any telecom generation and so it is in 5G. The basic handover procedure remains same as it was in legacy networks, i.e. UE reports measurement report with […]

October 2, 2021January 13, 2023 Author 5G, 5G Call Flow, Call Flow, New Radio, RRC Signalling, Signaling, Wireless Testing

5G NR pdcch-ConfigSIB1 – ControlResourceSetZero & SearchSpaceZero

In 5G, during initial network access, a UE does a completes a band scan for  SSB decodes the PBCH. The PBCH provides sufficient information lo allow the UE to proceed […]

September 18, 2021September 19, 2021 Author 5G, 5G Call Flow, 5G Physical Layer, Call Flow, RRC Signalling, Tech Fundas, Wireless Testing

5G NR SDAP – Service Data Adaptation Protocol

The 5G NR has introduce new mechanism to manage the Quality of Service via QoS flow and to handle QoS flow specifications has introduced a new Sublayer SDAP in air-interface […]

August 9, 2021August 9, 2021 Author 5G, 5G Core, 5G NR, Call Flow, NR

5G NAS Mobility Management – 5GMM

At 5GC, NAS Mobility Management (5GMM) procedures are responsible to keep track whereabouts of the UE, UE authentication and control integrity protection and ciphering. The 5GMM procedures also used by […]

July 27, 2021August 5, 2021 Author 5G Core, Call Flow, NAS Signalling, Open RAN, RRC, Telco Cloud

5G SA Handover – Inter gNB-DU and Intra gNB-CU Handover

Mobility (Handover) in an important feature in any telecom generation and so it is in 5G. The basic handover procedure remains same as it was in legacy networks, i.e. UE […]

May 11, 2021October 2, 2021 Author 5G Call Flow, 5G Network Architectures, 5G NR, 5G NR Standalone, Call Flow, New Radio, Open RAN, RRC Signalling, Tech Fundas, Wireless Testing

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