The PDN connectivity procedure is an important process when the LTE communication system accesses to packet data network. The purpose of PDN connectivity procedure is to set up a default EPS bearer between a UE and a packet data network.
What is PDN connection?
A PDN Connection is an association between an UE and a PDN, represented by one IPv4 address and/or one /64 IPv6 prefix. A PDN is identified by an APN and a PDN is accessed via a PDN-GW. A PDN is responsible for the IP address/prefix management.
What is APN and PDN?
The PDN is the packet data network to which a user wants to connect. APN is the Acces Point Name thorugh which the user reached the PDN.
What is PDN in IMS?
Tuesday 19 November, 2019. Some operators may define the well-known IMS APN as a LTE-only APN. The EPC releases the IMS PDN when it detects that UE is out of LTE reach. This saves network resource when UE goes to 3G/2G and encourages the UE to create IMS PDN again/restart IMS procedure.
What is PDN 3G?
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 also performs various functions such as IP address / IP prefix allocation or policy control and charging.
What is the APN of LTE?
APN LTE: Mobile Devices Making Data Connections must be Configured with an LTE APN. … Access Point Name (APN) is an identifier that lives in the LTE core network, otherwise known as the Evolved Packet Core (EPC). In that home, the APN comes into play inside the Home Subscriber Server (HSS) node of the core network.
What is best bearer in APN?
Bearer. The Bearer setting allows you to restrict the current APN configuration to only be available when specific communication protocols are in use. … It allows you, for example, to use one APN configuration to be selected when LTE is in use, and another APN configuration to be selected if eHRPD or EvDO is in use.
Is APN safe?
Additionally, an APN is required if you want to connect to the correct secure gateway or a private network such as a VPN. It is not only a means of connectivity; an APN is also extremely essential for security and privacy. While this may all sound like technological mumbo jumbo to you, do not worry.
Why is IMS needed?
Fundamental requirements for the IP Multimedia Subsystem
All communication between the subscribers uses packet-switched connections which are able to guarantee defined qualities of service (QoS) end-to-end. IMS allows services to operate independently from the access network and can be charged according to service.
What is the difference between IMS and VoLTE?
Quality of Service: the fundamental difference
The fundamental difference of VoLTE compared to VoIP is that VoLTE requires a QoS component. … While the VoLTE uses IMS and a separate radio frequency to help maintain the quality of the VoLTE transmission.