How MME is selected in LTE?
‘The MME selection function selects an available MME for serving a UE. The selection is based on network topology, i.e. the selected MME serves the UE’s location and for overlapping MME service areas, the selection may prefer MMEs with service areas that reduce the probability of changing the MME.
How does PGW select MME?
MME selects the PDN-GW where a requested (subscribed) PDN connectivity (APN) is located. Selection can be based on the information provided to the MME, when the UE attaches to the network. PGW selection is performed by the MME/SGSN at initial attach or PDN connection establishment.
What is MME in LTE?
The mobility management entity (MME), which presents a key control node for the LTE access network, manages UE access network and mobility, as well as establishing the bearer path for UE’s.
Can eNB connect to multiple MME?
Each SCTP association between an eNB and an MME can support multiple UEs. The S1-MME is responsible for EPC bearer setup and release procedures, handover signaling, paging, and NAS signaling transport.
What is MME pooling?
An MME pool area is an area through which the mobile can move without a change of serving MME. Every pool area is controlled by one or more MMEs, while every base station is connected to all the MMEs in a pool area by means of the S1-MME interface. Pool areas can also overlap.
What is Tai list?
To explain this process further, a UE obtains a TAI list when it attaches to an LTE network. This list shows the tracking areas where the LTE network believes a UE is located and within which a UE can travel without TAU.
What is MME SGSN?
Multi-access and multi-device services. SGSN-MME supports multi-access, 2G/3G/4G/5G and Wi-Fi networks to meet end-users’ requirements for access- and, device-independent services.
What is LTE protocol stack?
The protocol stack functions consist of the Medium Access Control (MAC), Radio Link Control (RLC), Packet Data Convergence Protocol (PDCP), and Radio Resource Control (RRC). LTE is the latest generation of the 3GPP standards. The LTE standard specifies an IP-only network supporting data rates up to 150 Mbps.
What is the EPC in a LTE network?
What is EPC in LTE? The EPC represents the Core of an LTE network. It is formed by multiple nodes, the main ones being MME, SGW, PGW and HSS. This nodes offer multiple functionality like mobility management, authentication, session management, setting up bearers and application of different Quality of Services.
How is the Mme selected in the EPC network?
Typically within the EPC network the EPS nodes would access the DNS servers via the Gn interface or O&M interface. eNodeB selects an available MME to serve the UE, based typically on network topology and the location of the UE within the network, so that the best MME is selected, e.g. to reduce the probability that the MME is changed.
Where is the Mme located in the LTE network?
MME (Mobility Management Entity) The MME is located at the edge of LTE EPC, between the core network and the radio network. The MME is responsible for handling signals between active UEs and the network within the LTE EPC architecture. It is also responsible for signaling between eNodeBs and the core network.
How does the ENB select an Mme for LTE?
The DNS may provide more than one MME address (candidate set) from which the eNB can select a MME. SGSN query the DNS Server to identify the Old MME during LTE to 3G/2G Handover.