LTE PROTOCOL INTRODUCTION
INTRODUCTION OF PROTOCOLS:
· There are three broad
categories of Protocols
o Application Protocols
o Processing Protocols
o Delivery Protocols
· Application Protocols: Generate the Information required
for the Communication of Nodes to achieve their Functionalities!
· Processing Protocols: Process the Information generated
by Application protocols!
· Delivery Protocols: Send the Processed Information from Source to Destination!
COMPUTER COMMUNICATION PROTOCOLS
This is work on a principle of OSI communication have 7 layer shown in below. This communication is done by the
use of Switches and Router between two computers.
LTE MOBILE PROTOCOL LAYER
Its work on Application, Delivery and Processing
Protocols.
LTE WIRELESS NETWORK INTERFACES
There are many Interfaces in LTE network which are mentioned below:
LTE INTEFACES |
PURPOSE
|
LTE-Uu
|
Interface between UE to Enb
|
X2
|
Interface between two adjacent eNBs
|
S1-MME
|
Interface between eNB to MME
|
S1-U
|
Interface between eNB to SGW
|
S3
|
Interface between MME to SGSN
|
S4
|
Interface between SGW to SGSN
|
S5/S8
|
Interface between SGW to PGW
|
S6a
|
Interface between MME to HSS
|
S6d
|
Interface between SGSN to HSS
|
S7/Gx
|
Interface between PGW to PCRF
|
S9
|
Interface between hPCRF to vPCRF
|
S10
|
Interface between MME to MME
|
S11
|
Interface between MME to SGW
|
S12
|
Interface between SGW to RNC
|
S13
|
Interface between MME to EIR
|
S13'
|
Interface between SGSN to EIR
|
S16
|
Interface between SGSN to SGSN
|
Gy
|
Interface between PGW to OFCS
|
Gz
|
Interface between PGW to OCS
|
Transport Protocols
There are few Transport Protocol which we need to know before proceed to
further:
· TCP: Transmission control Protocol
o It’s a connection oriented protocol.
o It’s a reliable protocol.
o It rearrange the data packet in the order specified.
o Speed is slower than UDP because its attempt error
recovery process also.
o Header size is 20 Bytes
o Guaranteed to data delivery.
· UDP: User Datagram Protocol
o It’s a connectionless protocol.
o It’s not reliable protocol.
o It is not rearrange the data packet in the order
specified.
o Speed is faster because its not attempt error recovery
process.
o Header size is 8 Bytes
o No Guaranteed for data delivery.
· GTP: GPRS Tunneling Protocol
o Its used to encapsulate user data when passing through
that core network.
o It provide mobility when UE is in mobility state, the
IP address remain same and packet are still forwarded since tunneling is
provide between PGW and eNB via SGW.
o There are two types GTPC is used for control plane and
GTPU is used for USER plane.
o Main IP is hidden so provided security also.
·
SCTP: Stream Control Transmission protocol
o It’s a connection oriented protocol.
o It’s a reliable protocol.
o It rearrange the data packet in the order specified.
o It does bundling the message but TCP doesn’t.
o Guaranteed to data delivery
·
Diameter: Its is a important protocol used for those components whose functionality
come under AAA(Authentication, Authorization and Accounting) category. Its not
a 3GPP protocol.
LTE WIRELESS NETWORK PROTOCOLS
These are the main application and transport protocol used for LTE
Network:
PROTOCOL SUMMARY
