What is X2 handover in LTE?
What is X2 handover in LTE?
The X2 handover procedure is performed without Evolved Packet Core (EPC) involvement, i.e. preparation messages are directly exchanged between the S-eNB and T-eNB. The release of the resources at the source. side during the handover completion phase is triggered by the T-eNB.
What is X2 in LTE?
The X2 is the interconnecting interface between two eNodeBs in LTE network and supports both Control Plane and User Plane. The principle Control Plane protocol is X2-AP (X2 Application Protocol) resides on SCTP (Stream Control Transmission Protocol).
What is LTE handover procedure?
Handover procedures are a key function of LTE eNBs. They are intended to reduce interruption time compared to the circuit-switched handover process in 2G networks. Thoroughly evaluating the performance of LTE eNBs requires testing multiple handover procedures, shown in the table below.
What is X2 AP?
X2 Application protocol (X2AP) provides control plane signalling between two eNBs in E-UTRAN (or between eNB and gNB for EN-DC) over X2 interface. X2 interface is used in UE related mobility procedures, in dual connectivity procedures and in global procedures between two eNBs (or one eNB and one gNB for EN-DC).
What is XN Handover?
Xn Handover can be Intra Frequency HO and Inter Frequency HO. Source and Target gNB can be connected two different UPFs. Re-Registration is required after Successful Handover if the Source gNB and Target gNB belong to different Tracking Area (TAC)
What is S1 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 is an X2 interface?
X2 interface. A point-to-point logical interface between two eNodeBs with the E-UTRAN. It supports the exchange of signaling information between two eNodeBs and supports the forwarding of protocol data units (PDUs) to the respective tunnel endpoints. X2 Application Protocol (X2AP) Protocol used by the X2 interface.
What is S1 mode in LTE?
What is N2 handover?
N2 Handover can be Intra Frequency HO and Inter Frequency HO. Source and Target gNB can be connected two different UPFs. Re-Registration is required after Successful Handover if the Source gNB and Target gNB belong to different Tracking Area (TAC)