What is s1u?
S1-U:- Reference point between E-UTRAN and Serving GW for the per bearer user plane tunnelling and inter eNodeB path switching during handover. S3:- It enables user and bearer information exchange for inter 3GPP access network mobility in idle and/or active state.
What is MME UE S1AP ID?
The MME-UE-S1AP-ID IE uniquely identifies the UE association over the S1 interface within the MME.
What is X2 and S1 interface?
eNodeBs have two interfaces, the X2 interface permits eNodeBs to intercommunicate with each other directly, and the S1 interface permits communication with the “Packet Core”. The X2 is the interconnecting interface between two eNodeBs in LTE network and supports both Control Plane and User Plane.
Which entities in LTE are connected by X2 interface?
The X2 interface connects multiple eNBs. LTE uses the same protocol structure over both S1 and X2 interfaces, which simplifies the data forwarding operation. The X2 interface has a control-plane (X2-C) and a user-plane (X2-U) component. The X2-U is responsible for the transport of user data packets between eNBs.
What is S1AP in LTE?
The S1 Application Protocol (S1AP) provides the control plane signalling between E-UTRAN and evolved packet core (EPC). The S1AP protocol is defined in TS 36.413. The S1AP protocol provides transport function between UE and MME by offering NAS signalling transport.
What is S6a interface in LTE?
S6a is an LTE 4G mobile-related interface between the MME and HSS used for authentication, location & service information about the subscriber. It uses Diameter over TCP, UDP, SCTP transport protocol. There are 4 messages initiated by the MME and 4 messages initiated by the HSS.
What is S1AP protocol?
What is UE context in 5G?
The UE signals the completion of the NAS security procedure. The message contains the IMEISV. 12:Namf_Communication_RegistrationComplete_Notify Since the AMF has changed the new AMF notifies the old AMF that the registration of the UE in the new AMF is completed. 5G-EIR.
What is S1AP interface?
The S1 Application Protocol (S1AP) provides the control plane signalling between E-UTRAN and evolved packet core (EPC). The used interface is S1-MME which is located between eNB and MME. The S1AP protocol provides transport function between UE and MME by offering NAS signalling transport.
What is S1 connection in LTE?
LTE S1-UP (user plane) The S1 user plane external interface (S1-U) is defined between the LTE eNodeB and the LTE S-GW. The S1-U interface provides non guaranteed data delivery of LTE user plane Protocol Data Units (PDUs) between the eNodeB and the S-GW. Transport network layer is built on IP transport and GTP-U.
What are S1AP messages?
What is the use of the S1 application protocol?
The S1 Application Protocol (S1AP) provides the control plane signalling between E-UTRAN and evolved packet core (EPC). The used interface is S1-MME which is located between eNB and MME. The services provided by the S1AP are divided to UE associated and non UE associated.
Where is the interface for the S1AP located?
The used interface is S1-MME which is located between eNB and MME. The services provided by the S1AP are divided to UE associated and non UE associated. The UE associated services are related to one UE and the non UE associated services are related to the whole S1-MME interface.
What is the function of Nas and S1AP?
The S1AP protocol provides transport function between UE and MME by offering NAS signalling transport. The NAS protocol provides mobility management and session management between the User equipment (UE) and Mobile Management Entity (MME). The NAS protocol is defined in TS 24.301.
What is the S1 interface for eNodeB in LTE?
This is an optimization in the LTE network for fast data speed. ENodeB connects to the LTE-EPC over the S1 interface. The interface further divides into two subinterfaces, the control plane (S1-C) and the user plane (S1-U).