What does SGW do?
SGW (Serving Gateway):The main function of the Serving Gateway is routing and forwarding of user data packets. It is also responsible for inter-eNB handovers in the U-plane and provides mobility between LTE and other types of networks, such as between 2G/3G and P-GW.
Which function handles by s-GW in LTE architecture?
The functions of the S-GW include a local mobility anchor point for inter-eNB handover; mobility anchor point for inter-3GPP mobility; EPS connection management (ECM)-IDLE mode downlink packet buffering and initiation of network-triggered service request procedure; lawful interception; packet routing and forwarding; …
What are the functions of Serving and PDN gateway?
The gateways (Serving GW and PDN GW) deal with the user plane. They transport the IP data traffic between the User Equipment (UE) and the external networks. The Serving GW is the point of interconnect between the radio-side and the EPC.
What is SGi interface in LTE?
The SGi interface is defined by the 3GPP as the interface between the Evolved Packet Core (EPC) and the Public IP network. Importantly, traffic through the interface can be identified by user IP, making user and service differentiation a reality.
What is MME and SGW?
MME stands for Mobility Management Entity, PGW stands for PDN gateway and SGW stands for Serving Gateway. The figure depicts LTE EPS architecture. In the figure, UE refers to User Equipment. It is the mobile phone device used to access the LTE network.
What is the purpose of the Signalling gateway SGW in IMS?
A signalling gateway (SGW) interfaces with the signalling plane of the CS. It transforms lower layer protocols as Stream Control Transmission Protocol (SCTP, an IP protocol) into Message Transfer Part (MTP, a Signalling System 7 (SS7) protocol), to pass ISDN User Part (ISUP) from the MGCF to the CS network.
How SGW and PGW is selected in LTE?
Following the PGW selection, the MME query the DNS Server to select an available SGW to serve the UE using the TAC, which in most cases is based on network topology and the location of the UE within the network, so that the best SGW is selected.
Which is the reference point between utran and serving GW?
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 SGW and PGW?
What is the difference between SGW and PGW?
This page compares MME vs PGW vs SGW used in LTE architecture and mentions functional difference between MME,PGW and SGW. MME stands for Mobility Management Entity, PGW stands for PDN gateway and SGW stands for Serving Gateway. The figure depicts LTE EPS architecture. In the figure, UE refers to User Equipment.