What is GTPv2 LTE?

What is GTPv2 LTE?

GPRS Tunnelling Protocol version 2. In LTE , GTP (GPRS Tunnelling Protocol) tunnels are used between two nodes communicating over a GTP based interface, to separate traffic into different communication flows. The receiving end side of a GTP tunnel locally assigns the TEID value the transmitting side has to use. …

What is difference between GTPv1 and GTPv2?

GTPv1-C is defined in 3GPP TS 29.060. GTPv2-C is defined in 3GPP TS 29.274. It is used on various EPC (Evolved Packet Core) signaling interfaces, such as S5, S8, and S11. GTPv2-C carries various types of control plane signaling messages.

What is S4 interface in LTE?

S4 interface between SGSN and SGW. It provides related control and mobility support between GPRS Core and the 3GPP Anchor function of Serving GW. In addition, if Direct Tunnel is not established, it provides the user plane tunnelling.

What is S11 in LTE?

S11 – This is the interface between the MME and S-GW in an LTE network. The interface is based on Gn/GTP-Control (GTP-C) (interface between SGSN-GGSN) with some additional functions for paging coordination, mobility compared to the legacy Gn/GTP-C (SGSN-GGSN) interface. S11 is a many-to-many interface.

What is GTP-C traffic?

GTP-C is used to signaling between the gateway GPRS support node (GGSN) and the serving GPRS support node (SGSN), while the GTP-U tunnel is used to encapsulate and route the user plane traffic across multiple signaling interfaces.

What is the difference between GTP-C and GTP-U?

GTP-C supports transport of control packets in IPv4 format. GTP-U— Transports user data within the core GPRS network and between the Radio Access Network (RAN) and the core network. GTP-U supports IPv4 and IPv6 user data, but transport is IPv4.

What is LTE tunneling?

GPRS Tunneling protocol is an important IP/UDP based protocol used in GSM, UMTS and LTE core networks. It is used to encapsulate user data when passing through core network and also carries bearer specific signalling traffic between various core network entities.

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.

What is S1 interface 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 S5 in LTE?

S5 interface It provides user plane tunnelling and tunnel management between Serving GW and PDN GW. It is used for Serving GW relocation due to UE mobility and if the Serving GW needs to connect to a non-collocated PDN GW for the required PDN connectivity.

Is GTP traffic encrypted?

Because of the many vulnerabilities in the protocol’s specifications, GTP became a prime attack target. The protocol does not support encryption, so, among other pieces of sensitive information, international mobile subscriber identity (IMSI), integrity session keys, and user data are sent in clear text.

What is the difference between GTP-C and GTPv1 in LTE?

Creation, deletion and modification of tunnels in case of GTP-C GTP Interfaces in LTE In LTE, version 2 is used for GTP-C and version 1 is used for GTP-U In simple LTE network implementation, GTP-v2 is used on S5 and S11 interfaces and GTPv1 is used on S1-U, S5, X2-U interfaces (as shown below).

Which GTP protocol is used in LTE?

GTP Interfaces in LTE In LTE, version 2 is used for GTP-C and version 1 is used for GTP-U In simple LTE network implementation, GTP-v2 is used on S5 and S11 interfaces and GTPv1 is used on S1-U, S5, X2-U interfaces (as shown below). In inter-RAT and inter PLMN connectivity, S3, S4, S8, S10, S12 and S16 interfaces also utilize GTP protocols

What is the GTPv2-C port number?

GTPv2-C carries various types of control plane signaling messages. The registered port number for GTPv2-C is 2123. GTP-U is defined in 3GPP TS 29.281. It encapsulates and routes user plane traffic across multiple signaling interfaces such as S1, S5, and S8. GTP-U messages are either user plane or signaling messages.

What is the use of the gngtpv1-c?

GTPv1-C is defined in 3GPP TS 29.060. It is used on a Gn interface, that is, the interface between GPRS support nodes (GSNs) within a public land mobile network (PLMN), and also across a Gp interface between GSNs in different PLMNs. It is also used for roaming and inter access mobility between Gn/Gp SGSNs and mobility management entities (MMEs).