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5G Tutorial: 5G Protocol stack in detail
Control Plane Protocol stack User Plane Protocol Stack: Protocol stack layers: Layer Flow: Function of RRC layer: System Information related messages to AS and NAS Paging, RRC connection...
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5G Tutorial: 5G overall architecture and protocol stack
This article will give you a brief introduction to 5G Architecture and 5G protocol stack. It is not the end-to-end architecture, but an overview. In the up-coming chapters we shall see the end to end...
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5G Tutorial: 5G architecture
In this tutorial we shall see 3GPP 5G network architecture. 5G architecture are of 2 types: 1. 5G architecture: This we shall see in this chapter 2. 5G Service based Architecture: This we shall see in...
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5G Architecture: Stand Alone (SA) and Non Stand Alone (NSA) architecture
Before we start looking into the 5G architecture, let us understand some of the terminologies involved: 5GC: 5G Core Network AMF Function: Access and mobility Management UPF: User Plane Function...
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5G Tutorial: 5G Enabling Technologies
5G Core Architecture (5GC) is made possible with the help of new technologies such as: 1. Virtualization 2. Cloud Native 3. Containers 4. Micro-services 5. Automation and Orchestration The above...
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5G Tutorial: 5G Reference Point Architecture
In the last chapter we saw Service Based Architecture. In this chapter we shall see reference point architecture. Image below shows the reference point architecture: Here reference points are like we...
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5G Tutorial: 5G Core Network Element: AMF in detail
In this chapter we shall have a look at the functions of 5G Core Network elements 1. AMF: Access and Mobility Function AMF is similar to MME in 4G AMF interacts with NG RAN using N2 interface AMF...
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5G Core Network Element: SMF in detail
SMF : Session Management Function SMF is responsible for setting up the connectivity for the UR towards the Data Networks. It also manages user plane for that connectivity. SMF manages the...
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5G Core Network Element: UPF, UDM, PCF in detail
UPF: User Plane Function UPF processes and forwards user data to/from SMF. It will connect to external data networks. It will generate charging data records and traffic usage records. It is capabe of...
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5G SSC modes
SSC: Session and Service Continuity Mode SSC is used to support multiple continuity requirements. SSC is associated with PDU session and will not change during the lifespan of a PDU session. It means,...
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5G NR SIB2
SIB2 contains cell re-selection information common for intra-frequency, inter-frequency and/or inter-RAT cell re-selection as well as intra-frequency cell re-selection information other than...
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5G NR SIB3
SIB3 is OSI It provides neighboring cell related information related to intra-frequency cell re-selection. Includes cells with specific re-selection parameters SIB3 cell specific information can be...
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5G NR SIB4 to SIB9
SIB4: SIB4 contains information relevant for inter-frequency cell re-selection (i.e. information about other NR frequencies and inter-frequency neighbouring cells relevant for cell re-selection),...
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5G NR: Different Types of RACH procedures and triggers for RACH procedure
RACH: Random Access procedure is used for uplink synchronization and RRC Connection. UE will get downlink synchronization after successfully decoding SSB. Before Rel 16, there was only 1 type of RACH...
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5G NR 4 step RACH procedure in brief
In this chapter we will look into Rel-15 RACH procedure in brief. In upcoming chapters we shall have a look indetail about the message contents. WKT UE will perform Cell Search and SSB decoding for...
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5G NR Random Access Resource Selection
In this chapter we shall see where the UE can get the resources for PRACH transmission. Before UE can send a PRACH, it needs to select an SSB then UE will selects an SSB with SS-RSRP above...
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5G NR RACH process – Msg1 – Generation PRACH Preamble
In previous 2 chapters, we had a a brief of RACH procedure. In the next chapters we shall have indepth understanding of all the messages. In brief: 1. CBRA procedure is as below: i) UE –> NW : RACH...
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5G NR RACH process – Msg1 – RA-RNTI calculation and Power control
Once the RACH configuration and preambles are selected, it is to be sent out to the available PRACH occation. For that RA-RNTI is to be calculated according to the PRACH occation. In this chapter we...
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5G NR RACH process – Msg2
This is the 2nd step in RACH procedure. In this chapter we shall understand below 2 points: 1. How does a UE receive Msg2 ? 2. What are the contents of Msg2 ? 1. How does a UE receive Msg2 ? 1. gNB...
View Article5G NR RACH process – Msg3/4 and Contention Resolution
Msg3 and Msg4 are used for contention resolution. The uplink time synchronization are completed in Msg1 and Msg2. The purpose of Msg3 and Msg4 is to identify the C-RNTI for the subsequent data...
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