What is e-Rab in LTE?
An E-RAB (E-UTRAN Radio Access Bearer) refers to the concatenation of an S1 bearer and the corresponding radio bearer. When an E-RAB exists, there is a one-to-one mapping between this E-RAB and an EPS bearer of the Non Access Stratum.
What is PDN connectivity request in LTE?
· The PDN connectivity procedure is used by the UE to request the setup of a default EPS bearer to a PDN. · The UE requests connectivity to a PDN by sending a PDN CONNECTIVITY REQUEST message to the network.
What is initial context setup in LTE?
The purpose of the Initial Context Setup procedure is to establish the necessary overall initial UE Context including E-RAB context, the Security Key, Handover Restriction List, UE Radio capability and UE Security Capabilities etc. The procedure uses UE-associated signalling.
What is LTE attach procedure?
LTE attach procedure is the procedure in which the UE registers to the network, and creates the EPS Bearer between the UE and the PGW, in order to be able to send and receive data, to and from the PDN. LTE Attach Procedure. Learn Mobile Packet Core Network in 5 Hours.
What is E-RAB ID?
The E-RAB-ID IE uniquely identifies a radio access bearer for a particular UE, which makes the E-RAB ID unique over one S1 connection. The E-RAB ID shall remain the same for the duration of the E-RAB even if the UE-associated logical S1-connection is released or moved using S1 handover.
What is the difference between APN and PDN?
In a mobile network, the access point name (APN) is the virtual private network (VPN) that connects the user equipment through the Packet Data Network Gateway (P-GW) to the Packet Data Network (PDN). The APN also defines the tunnel connecting the user equipment to a PDN such as the Internet.
Which one will initiate PDN connectivity procedure?
The UE initiates the UE Requested PDN procedure by the transmission of a PDN Connectivity Request (APN, PDN Type, Protocol Configuration Options, Request Type, Header Compression Configuration) message.
What is ESM information request?
The ESM information request procedure is used by the network to retrieve protocol configuration options like APN etc. from the UE during the attach procedure. This procedure is used as the UE has indicated (in the PDN CONNECTIVITY REQUEST) that it has ESM information that needs to be sent with security.
What is UE context release in LTE?
This message is sent by the MME to request the release of the UE-associated S1-logical connection over the S1 interface.
What is LTE service request?
A Service Request is a procedure an UE executes when it is in Idle mode and needs to establish the bearers to send data or it needs to send signaling to the MME. The UE Triggered Service Request procedure is outlined in Figure 17.8.