What is s1u?

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 are the interfaces in LTE?

The main interfaces in LTE are Uu, S1-MME, X2, S1-U, S11 and S5. This is the air interface between UE and eNB. LTE layer 1 is dealt with later. RRC is the protocol that is used for communication between UE and eNB.

What is LTE S1 interface?

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 Telecom interface?

In telecommunications, a network-to-network interface (NNI) is an interface that specifies signaling and management functions between two networks. An NNI circuit can be used for interconnection of signalling (e.g., SS7), Internet Protocol (IP) (e.g., MPLS) or ATM networks.

What is 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.

Why are we using S1 interface?

The S1-MME interface provides a high level of reliability in order to avoid message retransmission and unnecessary delay in control-plane procedures using stream control transmission protocol (SCTP) [20]. The role of S1-U is to transport user data packets between the eNB and the S-GW.

What is S1 interface in 5G?

In LTE networks, X2 and S1 interface are defined as an interfaces between RAN nodes and between RAN and Core Network. 5G is expect to operate in two modes as non -standalone and standalone mode of operation. Interface between RAN and Core Network as S1/NG.

Which transport protocol can be used by the S5 interface?

S5/8 interface is between the SGW and PGW. It uses GTP V2 over UDP transport protocol.

What are the functions of the LTE S1 interface?

S1 performs the following functions: 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.

What is the S1 User Plane external interface?

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.

Which is the system interface for LTE network?

This page of LTE tutorial covers LTE system interfaces viz. S1, X2-C, X2-U, S8, S10, S11, S12, S13, SBc, RX interface etc. These interfaces are used in EPS of the LTE network. Refer LTE EPC network interfaces which mentiones LTE system network architecture with these interfaces and more.

Which is the network interface for LTE EPC?

LTE EPC Network Interfaces-S1 MME,S1-U,S3,S4,S5,S6a,Gx,S11,SGi LTE EPC interface Description S1 MME Interface for control application protoc S1 U Interface for S1 user plane data for eac S3 Connection between SGSN and MME is provi S4 Interface between SGSN and serving gatew