What is GGSN and PGW?
P-GW—In 2G and 3G networks, the node that handled all user packets to and from the user equipment is called the GGSN. In the LTE architecture, this is the Packet Gateway (P-GW) or sometimes seen as the Packet Data Network Gateway (PDN-GW).
What protocol is used between SGSN and GGSN?
Gn interface is between the SGSN and GGSN. It uses GTP V1 over UDP transport protocol.
What is the interface between GGSN and ISP?
Gp interface is defined between two GSNs of different PLMN for exchanging the user profile and other signaling information between a SGSN and GGSN of another area. Gf interface is used between SGSN and EIR to query the IMEI information if a MS tries to register with the network.
What are advantages of SGSN and GGSN?
SGSN helps in the services within a network, whereas GGSN helps in the gateway outside the network. Also, the Packet Control Unit or PCU is present in the network that helps to determine where the data should be routed. It is either given to packet-switched or circuit-switched networks in the system.
What is GGSN in 4G?
A Gateway GPRS Support Node (GGSN) is part of the core network that connects GSM-based 3G networks to the Internet. The GGSN, sometimes known as a wireless router, works in tandem with the Serving GPRS Support Node (SGSN) to keep mobile users connected to the Internet and IP-based applications.
What is PDN in LTE?
These networks are called PDN (Packet Data Network), hence the name. The PDN GW routes packets to and from the PDNs. The PDN GW also performs various functions such as IP address / IP prefix allocation or policy control and charging.
What is GGSN ID?
The GGSN is responsible for IP address assignment and is the default router for the connected user equipment (UE). The GGSN also performs authentication and charging functions.
What is the role of SGSN and GGSN components?
SGSN, Serving GPRS Support Node: The SGSN forms a gateway to the services within the network. GGSN Gateway GPRS Support Node: The GGSN, forms the gateway to the outside world. PCU, Packet Control Unit: The PCU detects whether data is to be routed to the packet switched or circuit switched networks.
What is the interface between GGSN and HLR?
15) What is the interface between GGSN and HLR in a GPRS network? Explanation: GGSN may also enquire HLR using SGSN. SGSN interfaces with HLR using Gr interface.
What is the use of GGSN?
The Gateway GPRS Support Node, abbreviated as GGSN, is a node acting as an extension for the SGSN (see description for MSC) in GPRS networks to connect a GPRS network to an external data network (e.g., Internet).
What is EPC and IMS?
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 EPS and EPC?
EPS is composed of E-UTRAN (Evolved UTRAN) and EPC (Evolved Packet Core) which are commonly known as 3G-LTE (Long Term Evolution) and SAE (System Architecture Evolution) respectively. E-UTRAN is focused on the evolution of the Radio Access Network while EPC looks into the future needs of the core network.
How do you differentiate between SGSN and GGSN?
SGSN and GGSN are used for connecting our cell phones to mobile internet through GPRS, EDGE, HSPA and HSPA+ technologies in 2G GSM and 3G UMTS networks. SGSN is the main node that performs packet-switching functions, whereas GGSN is more of a router that connects SGSN to the external data networks.
Why IMS is used in LTE?
IMS mainly enables the convergence of data, speech, and mobile network technology over IP based infrastructure, and it provides the necessary IMS capabilities such as service control, security functions (e.g. authentication, authorization), routing, registration, charging, SIP compression, and QOS support.
What is a PDN in LTE?
The PDN GW is the point of interconnect between the EPC and the external IP networks. These networks are called PDN (Packet Data Network), hence the name. The PDN GW routes packets to and from the PDNs. The PDN GW also performs various functions such as IP address / IP prefix allocation or policy control and charging.
What is EPC in Telco?
Evolved Packet Core (EPC) is a framework for providing converged voice and data on a 4G Long-Term Evolution (LTE) network. 2G and 3G network architectures process and switch voice and data through two separate sub-domains: circuit-switched (CS) for voice and packet-switched (PS) for data.
What is SGSN in LTE?
The Serving GPRS Support Node (SGSN) is the node that is serving the MS/UE. The SGSN supports GPRS and/or UMTS. The SGSN keeps track of the location of an individual MS/UE and performs security functions and access control.
What is difference between VoLTE and IMS?
IMS (IP Multimedia Subsystem) is a network element that works alongside 4G LTE core network (Evolved Packet Core – EPC) to enable Voice over LTE (VoLTE) in 4G networks; VoLTE is an IP-based technology enabled by EPC and IMS in packet-switched LTE networks to facilitate voice calls and texts (SMS).
What is IMS and EPC?
What is PDN in telecom?
A public data network (PDN) is a network established and operated by a telecommunications administration, or a recognized private operating agency, for the specific purpose of providing data transmission services for the public.
Is VoLTE same as VoIP?
The fundamental difference of VoLTE compared to VoIP is that VoLTE requires a QoS component. Voice packets for VoIP get sent along with Internet nodes and are treated no differently than any other data. While the VoLTE uses IMS and a separate radio frequency to help maintain the quality of the VoLTE transmission.
What is IWF in GSM?
An interworking function (IWF) acts a gateway to enable 2G and 3G network elements to connect and communicate with 4G LTE network elements, such as between MAP-based and Diameter-based interfaces.
Which is better VoIP or VoLTE?
Theoretically, the quality of VoLTE calls compared to regular VoIP calls is better. Practically, however, you can only enjoy HD Voice when using an HD Voice device at both ends. If one device does not have HD capability, the voice quality for the caller and receiver will not have high definition sound.
What is the difference between 4G LTE and VoLTE?
Generally, LTE is also called 4G. VoLTE stands for ‘Voice over Long Term Evolution’. It also supports 4G networks. In VoLTE, you can enjoy data connectivity while calling.
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What is the difference between LTE and VoLTE?
| LTE | VoLTE |
|---|---|
| 1. Its full form is ‘Long Term Evolution’. | 1. Its full form is ‘VoLTE stands for Voice over Long Term Evolution’. |
What is PSTN in GSM?
The public switched telephone network, or PSTN, is the world’s collection of interconnected voice-oriented public telephone networks. PSTN is the traditional circuit-switched telephone network.