What is attach request in LTE?

What is attach request in LTE?

The Attach message is sent in the Initial UE message to the MME over the S1AP interface. The “Attach Request” is embedded in the Initial UE Message. The message also includes the PDN Connectivity Request message. The Tracking Area Identify (TAI) and E-UTRAN Cell Global Identifier (ECGI) are also included.

What is UE attach?

the UE establishes radio link synchronization with an eNB, the UE creates a connection for data delivery via an Attach Request message sent to the eNB, the eNB then forwards the attach request to an MME, which in its turn sends an Update Location Request to an HSS.

What is the order in which the call flow happens?

According to Wired n Wireless, the LTE call flow travels through many steps during its end-to-end signaling between from user equipment (UE) to the evolved node B (eNB), mobility management entity (MME), home subscribe server (HSS), serving gateway (SGW) and PDN gateway (PGW).

How UE is connected to eNodeB?

UE establishes the RRC Connection with the eNodeB. 2. The UE sends the ATTACH REQUEST message together with a PDN CONNECTIVITY REQUEST for the PDN (IP) connectivity on the established RRC Connection. As part of this, the eNodeB establishes the S1 logical connection with the MME for this UE.

What is LTE attach call flow?

Here’s the LTE Attach Procedure Call Flow, broken down into steps, derived by 3GPP. Step 1. The UE initiates the attach procedure by transmitting an attach request to the eNodeB. Step 2. The eNodeB derives the MME from the RRC parameters carrying the old GUMMEI and the indicated Selected Network.

What is attach APN?

LTE Attach APN Configuration for MBIM Modems To establish a default EPS bearer with the network the device must request a PDP context activation during the LTE attach procedure, which requires Access Point Name (APN) specification. The network uses it as the LTE attach APN.

What is attach procedure?

Attach procedure may trigger one or multiple Dedicated Bearer Establishment procedures to establish dedicated EPS bearer for that UE. During the LTE Initial Attach procedure, the Mobile Equipment Identity is obtained from the UE. The MME operator may check the Mobile Equipment Identity with EIR.

What are the parts of a call flow?

Here are the crucial elements that make up a winning call flow.

• Efficient Call Handling.
• A Good Call Management Feedback System.
• Efficient Automated Attendant System.
• Total time the customer is on the phone line.
• Key Takeaway:

What does E stands for in eNodeB?

eNodeB represents the 4G LTE radio access network E-UTRAN – Evolved UMTS Terrestrial Radio Access Network. It connects to the 4G LTE core network, the EPC – Evolved Packet Core. 2G – GSM Radio Network.

What is the interface between the eNodeB and Mme called?

LTE S1-MME interface
The LTE S1-MME interface is responsible for delivering signaling protocols between the eNodeB and the MME. S1-MME interface consists of a Stream Control Transmission Protocol (SCTP) over IP and supports multiple UEs through a single SCTP association.

What is attach APN Windows 10?

APN settings. The internet access point name (APN) is the address your Windows 11 device uses to connect to the internet when using your cellular data connection. Usually, the internet APN is set automatically.

What is call flow in LTE?

LTE Call Flow explained The call flow in the LTE network is unique among mobile communication standards and represents the signaling and sessions established across the network.

What is happening in the LTE call flow in eNodeB?

18. eNodeB will send RRC reconfig to activate the default radio bearer. 19. The next thing happening in the LTE call flow is that the UE will send acknowledgment message and attach RRC LTE complete (EPC Bearer Identity, NAS sequence number, NAS-MAC).

What is LTE attach and default bearer setup?

LTE Attach and Default Bearer Setup Flow LTE attach and default bearer signaling flow describe the attach to a new MME followed by a default bearer setup.

How does S1AP handle the LTE attach and default bearer signaling?

Contention resolution between UEs also explored in this flow. LTE attach and default bearer signaling flow describe the attach to a new MME followed by a default bearer setup. Explore the S1AP handling of: (1) LTE Attach (2) PDN Setup and Default Bearer Setup for two PDNs (3) UE context release (4) Service Request.