What is application function in 5g

AF (Application Function): It performs operations like accessing Network Exposure Function for retrieving resources, interaction with PCF for Policy Control, Applications Traffic Routing, Exposing services to End users, etc. It exposes the Application layer for interacting with 5G Network resources.

What is application function LTE?

The application function was created as a concept several years back as part of 3GPP standardization. … Simply put, the AF acts a quality controller for specific applications which resides on the network and interconnects with a policy charging and rules function element.

What is 5G PCRF?

Policy and Charging Rules Function [PCRF] assists service data flow detection, policy enforcement, and flow-based charging. PCRF allows next generation communications service providers [CSPs] to provide diverse use cases as a complete solution.

What is the function of AMF in 5G?

The main 5G NFs are the following: Access and Mobility Management function (AMF) supports: Termination of NAS signalling, NAS ciphering & integrity protection, registration management, connection management, mobility management, access authentication and authorization, security context management.

What is af application?

Application Function. The AF is a logical element of the 3GPP PCC framework which provides session related information to the PCRF in support of PCC rule generation.

What is LTE MME?

MME (Mobility Management Entity):The MME is an important controller node in the LTE network. It is responsible for: Idle mode UE (User Equipment) tracking. Paging procedure such as re-transmissions. Bearer activation and deactivation process.

What is SGW in 5G?

SGW (Serving Gateway) – is the boundary between E-UTRAN and EPC. SGW transfers data from the eNodeB to the PGW using the S1-U (in communication with the eNodeB) and S5 / S8 (in communication with the PGW) interfaces.

What is 5G SMF?

The 5G Session Management Function (SMF) is a fundamental element of the 5G Service-Based Architecture (SBA). The SMF is primarily responsible for interacting with the decoupled data plane, creating updating and removing Protocol Data Unit (PDU) sessions and managing session context with the User Plane Function (UPF).

What is N2 handover in 5G?

1 Introduction. Handover procedures in 5GS are used to hand over a UE from a source NG-RAN node to a target NG-RAN node. … The latter case is referred to as “N2-based” since the N2 interface between NG-RAN and AMF is used to manage the handover.

What is PCC rule in 5G?

The PCC (Policy and Charging Control) architecture has been specified by the 3GPP as a mechanism which enables packets flowing through an IP-CAN to be associated with a particular charging key for both online and offline billing.

Article first time published on

What is LTE call flow?

With Long Term Evolution (LTE) comes a myriad of new and exciting attributes. One of these is the LTE call flow itself. In fact, call flow and signaling is unique for LTE, and is driven by 3GPP standards. Call flow is how signaling and sessions are created across an LTE network.

What is UDM in 5G?

Unified data management (UDM) manages network user data in a single, centralized element. The technology is similar to the 4G network’s home subscriber service (HSS) but is cloud-native and designed for 5G specifically.

What is SBI in 5G?

SBI is the term given to the API based communication that can take place between two VNFs (Virtualized Network Functions) within the 5G SBA (Service Based Architecture). A given VNF can utilise an API call over the SBI in order to invoke a particular service or service operation.

What is IMS and EPC?

First of all there is the Evolved Packet Core (EPC) and then there is the IP Multimedia Sub-system (IMS), as shown in Figure 3.15. All user data goes through EPC and the data related to the operator IMS services (such Voice over LTE) goes also via IMS while traffic to the normal internet does not.

What is function of MME?

An MME is a critical network function, which deals with the EPC control plane. Its role is to manage sessions, authentication, paging, mobility, bearers and roaming. It manages an eNB and an S-GW through the S1-MME and S11 interfaces respectively, and communicates with HSS through the S6 interface.

What is UE identity?

Radio Network Temporary Identifier (RNTI) is used as UE identifiers within E-UTRAN and in signalling messages betweeen UE and E-UTRAN. Cell RNTI (C-RNTI) The C-RNTI provides a unique UE identification at the cell level identifying RRC Connection. Each RRC connection is associated with C-RNTI.

What is LTE handover?

Abstract: Handover in LTE occurs when a device moves from the cell coverage serving it towards another; a process where the user established session must not be interrupted due to this cell change.

What is XN based handover?

Xn Handover is similar X2 Handover in 4G LTE. Xn handover prerequisite is that an Xn interface must be up between source and Target gNB. This type of Handover is only applicable for intra-AMF mobility, i.e. Xn handover cannot be used if Source and Target gNB is connected to different AMF.

What is PS handover?

PS Handover PS Handovers requires the target cell to setup dedicated resources for an incoming UE. The source cell queries the target cell for the resources, and then communicate them to the UE to access the target cell. This bypasses the RRC connection setup procedure, thus minimizing the data flow interruptions.

What is SMSF 5G?

In 5G networks, the SMSF supports the transfer of SMS over NAS. In this capacity, the SMSF will conduct subscription checking and perform a relay function between the device and the SMSC (Short Message Service Centre), through interaction with the AMF (Core Access and Mobility Management Function).

What is SMF and AMF?

The AMF performs most of the functions that the MME performs in a 4G network but The SMF performs the session management functions that are handled by the 4G MME, SGW-C, and PGW-C. AMF: Access and Mobility Function. The AMF performs most of the functions that the MME performs in a 4G network.

Which node performs policy control?

Policy and Charging Rules Function (PCRF) is the software node designated in real-time to determine policy rules in a multimedia network. As a policy tool, the PCRF plays a central role in next-generation networks.

Which interface introduces new protocol in 5G?

5G RAN Architecture The primary new interface is the F1 interface between DU and CU This are expected to be interoperable across vendors.

What is Sy interface?

The Diameter SY (DSY) Interface acts as the Sy reference point between an external Policy and Charging Rule Function (PCRF) and the OCS (Prepaid Charging). Features. The following Command Codes specified in 3GPP TS 29.219 V14.1.0 (2017-03) are supported: Command-Name.

What is KPI in LTE?

The 4G/LTE technology has been developed to meet user requirements and provide high network performance. In order to monitor and optimize the network performance, there is a need of using Key Performance Indicators (KPIs). The KPIs can control the quality of provided services and achieved resource utilization.

What is SIP in VoLTE?

SIP stands for Session Initiation Protocol (SIP) , In a VoLTE call SIP protocol is used to create, modify and terminate sessions, essentially negotiating a session between two users. SIP does not perform transport layer (delivering data) those are done by RTP/RTCP .

What is 3G FallBack?

With circuit-switched fallback, when the user’s device is operating in LTE (data connection) mode and a call comes in, the LTE network pages the device. The device responds with a special service request message to the network, and the network signals the device to move (fall back) to 2G/3G to accept the incoming call.

Is NRF mandatory in 5G?

A more flexible and agile 5G core with Network Repository Function. … The NRF allows 5G NFs to register and discover each other via a standards-based API. Oracle Communications NRF is a critical component required to implement the new service-based architecture (SBA) in the 5G core.

Is VoLTE and IMS same?

Mobile operators are evolving their networks from existing 2G/3G circuit-switched networks to LTE packet-based networks and are now adding Voice Over LTE (VoLTE) services using IMS.

What is Srvcc in LTE?

Single radio voice call continuity (SRVCC) is an LTE feature that allows a VoIP/IMS call in the LTE packet-switched domain to be transferred to a legacy circuit-switched domain (GSM/UMTS or CDMA2000).

What is LTE IMS vs LTE internet?

LTE vs IMS LTE is actually a wireless broadband technology developed to support roaming Internet access using mobile phones. IMS is more of an architectural framework designed to support IP multimedia services and has been around for some time.