Telecom Guruji

Introduction In this blog, we will delve into the latest updates to 5G signalling procedures as of 2024, focusing on the Initial Context Setup , Xn Based Handover , and RRC Connection Release procedures. These procedures are crucial for maintaining efficient communication between the User Equipment (UE) and the network, ensuring secure and reliable connectivity in the 5G ecosystem. Initial Context Setup In 5G Signalling Procedures In 5G Signalling procedures The Initial Context Setup procedure can be completed after the UE has established an RRC Connection and has thus already configured SRB 1. The Initial Context Setup procedure is used to create a UE context at the Base Station activate ciphering and integrity protection configure SRB 2 configure one or more Data Radio Bearers (ORB) Procedure Overview Figure below illustrates the Initial Context Setup procedure in combination with the RRC Connection Setup procedure assuming a Centralised Unit (CU)- Distributed Unit (DU) split Base S...

  Introduction To 5G Signalling Procedures As 5G technology continues to evolve, understanding the critical 5G signalling procedures within the 5G Radio Access Network (RAN) becomes increasingly important. This blog delves into the RRC (Radio Resource Control) Connection Setup procedure, a fundamental aspect of the 5G signalling Procedures process that facilitates the transition from RRC Idle mode to RRC Connected mode. This transition is essential for enabling application data transfer and other signalling procedures in a 5G environment. RRC Connection Setup In 5G Signalling Procedures The RRC Connection Setup procedure is used to make the transition from RRC Idle mode to RRC Connected mode. The UE must make this transition before transferring any application data, or completing any signalling procedures. The RRC_Connection Setup procedure is always initiated by the UE but can be triggered by either the UE or the network. For example, the UE triggers RRC Connection Setup if the en...

 Introduction To 5g Signalling Procedures As the landscape of 5G technology continues to evolve, understanding the intricate signalling procedures involved in maintaining seamless connectivity becomes crucial. This blog explores some of the advanced 5G signalling procedures as of 2024, with a focus on the interaction between 4G and 5G nodes during the EUTRA-NR Dual Connectivity (EN-DC) process. Specifically, we’ll discuss the handling of Signalling Radio Bearer (SRB) messages, resource coordination between nodes, and additional signalling features like the SGNB Addition Trigger Indication and Subscriber Profile Identity (SPID). EN DC Secondary Cell Addition In 5G Signalling Procedures The EUTRA-NR Dual Connectivity (EN-DC) Secondary Cell Addition procedure is used to provide a UE with an NR Secondary Cell. The UE must already be connected to the 4G Master Node as a prerequisite to this procedure. Figure below illustrates the radio network signalling for the initial 4G connection. I...

 Introduction To 5G Signalling Procedures As 5G technology continues to evolve, signalling procedures between 4G LTE and 5G NR (New Radio) networks have become more refined. As the deployment of 5G networks progresses, the interaction between 4G LTE and 5G New Radio (NR) systems has become increasingly crucial. The evolution of signalling procedures, particularly for devices in Radio Resource Control (RRC) Idle mode, ensures that users experience seamless transitions and maintain high-quality service. This blog will delve into the latest updates in 2024 regarding 5G signalling procedures, focusing on LTE RRC Idle mode, the role of System Information Blocks (SIB), and the use of the 5G Status Indicator. LTE RRC Idle Mode In 5G Signalling Procedures System Information Blocks (SIB) System Information Blocks (SIB) belonging to LTE can be used to broadcast: A 5G Status Indicator within SIB2 which allows the UE to display a 5G icon. This icon informs the end-user that 5G services ar...