Telecommunications Flashcards
What is the sim card?
The sim card may be the node for the 4G LTE & 5G compatible UE.
What does the EPS contain?
EPC and Eutran
What does the EPC contain?
HSS, PGW, PCRF, Eutran contins eNode b and uE.
What is the X2 protocol used to connect to?
UE to eNode B
Why is X2 protocol used?
It causes less delays and problems.
What does eNode b connect to and how?
EPC using S1 protocol.
What node does the RAN have?
The RAN has one node which is eNode b.
What does RAN stand for?
Radio Access Network
The 4G LTE
/ 5G RAN, known as the E-UTRAN, creates a wireless connection between UE and the mobile networks.
The RAN uses radio (RF) waves to wirelessly connect cellular devices to the cell tower
EPC Network
S8 and s11 are protocols
IMS Network
SGW connects to PGW through the s5 protocol making sure that the PGW gets the correct information
and saves the state of the user information. And also does paging
Entire system is EPS. MME, PCRF, PGW has to connect to enode be using S1
protocol.
MME verifies, authorizes and secures and handles hand over between networks and stores GUTI
MME uses the S11 protocol to connect with the SGW
X2 helps single point failure. EPS stands for Evolved Packet System.
EPS uses IP Protocol and TCP to provide information. EPS provides data
such as media and voice
EPS has EPC, IMS, and E-UTRAN
EPC has MME, HSS, PCRF, S-GW, P-GW
E-UTran has enode be and UE
MME uses a protocol called NAS
Protocol is a set of rules for how nodes communicate with each other
HSS is the data base
PGW routes data to the terminal
You can think of a node as a checkpoint for data and information transfer.
Nas stands for nano access system, Nas protocol are used between user
and MME
Through the RAN the UE interacts with the User Plane (data use) and the Control Plane
(signaling messages) simultaneously in the RAN, the 4G LTE RAN is known as the E-UTRAN, and EPS
network. EPS is composed of E-UTRAN, EPC, and SAE. The E-UTRAN is made up of one node which is the
eNode B.
Search up EPC network questions and IMS network questions on google to prepare for job
interviews as you don’t need to know about the RAN. I can ignore the relationship between UE and Ran
and focus on the relationship between RAN and EPC, and EPC to IMS. Particularly the EPC (Evolved
Packet Core) network which is the base network is what I am paid to know and understand. What is a
node? Nodes can send and receive data / information within a network. In the EPS there are four key
nodes we care about which is the MME, S-GW, P-GW, HSS
The second level architecture which I am to know is the IMS (IP Multimedia Services) network.
So basically only need to know of two architectures.
Most of the time your use is to help your fellow employees understand tools that you
understand from experience, but those tools overall are for analysis of the architecture and to be able to
troubleshoot the architecture. The body of this essay should be one giant allusion to the network
architecture and around would be how all the tools that we use fall into play. While reading the
LTEP3_EPC_call_flows_V5.2.docx document I am not too sure as to what VoIP over IMS means off the
jump or what LTE Phase 3 means. UE, user equipment, which in the SVT Team is the android and ims
devices that are used for testing, connects to eNode B in the RAN Network. The radio access network
would be the call box in the TA room produced by Cambria and eNode B would be the satellite that the
Cambria machine connects to.
