ProDeveloperTutorial.com

Tutorials and Programming Solutions
Menu
  • Shell Scripting
  • System Design
  • Linux System Programming
  • 4g LTE
  • Coding questions
  • C
  • C++
  • DSA
  • GIT

LTE chapter 12. LTE control Plane protocol Stack

prodevelopertutorial March 29, 2020

In the last chapter we learn about LTE User Plane Protocol stack, in this chapter we shall see LTE Control Plane Protocol Stack.

Below 2 images shows detailed description of Control Plane Protocol Stack.

LTE chapter 12. LTE control Plane protocol Stack

 

LTE chapter 12. LTE control Plane protocol Stack

Below is the simplified version of control plane protocol stack.

 

Below is the simplified version of control plane protocol stack.

 

On a high level, the control plane protocol stack on the UE side is similar to User plane protocol stack, with an additional “NAS” and “RRC” layer.

The “NAS” layer from the UE side will communicate directly with MME “NAS” layer.

The “RRC” layer from the UE side will communicate with eND “RRC” layer.

The working of PDCP, RLC, MAC layer will remain same as we saw it in previous chapter.

We shall see the functions of “NAS”, “RRC” layers in detail.

 

1. PDCP : Packet Data Convergence Protocol

Below are few of the functions of PDCP Control plane layer:

1. Ciphering and Integrity Protection
2. Transfer of control plane data

 

2. NAS: Non-Access-Stratum (NAS) Protocol

1.  Mobility Management
2.  Session Management
3.  Bearer Management
4.  Paging Control
5.  Security Management
Protocol specification
3GPP TS 24.301 – Non-Access-Stratum (NAS) protocol for Evolved Packet System (EPS); Stage 3

 

3. RRC: Radio Resource Control (RRC)

1.  Configuration Management
2.  Connection Management
3.  Paging control
4.  Security Management
5.  Broadcast
6.  Measurement configuration
7.  Measurement Reporting
8.  Cell selection and re selection
9.  Mobility Management
Protocol specification
3GPP TS 36.331 – Evolved Universal Terrestrial Radio Access (E-UTRA); Radio Resource Control (RRC)

 

Below are different types of Procedures available:

Physical Layer Procedure

1. Random Acess
2. PLMN selection/ Intr-Rat PLMN selection
3. Cell Selection and reselection/ Inter-RAT cell selection and reselection
4. Closed subscriber group cells.

RRC Layer Procedure:

1. RRC connection establishment
2. RRC connection release
3. RRC connection reconfigureation
4. Measurement configuration control and reporting
5. RRC others – Radio link failure
6. RRC others – Redirection to E-UTRAN

 

NAS Layer Procedure – EPS mobility management

1. Authentication procedure
2. Security mode control procedure
3. Identification procedure
4. Attach procedure
5. Detach procedure
6. Tracking area updating procedure; Service request procedure
7. Paging procedure

NAS Layer Procedure – EPS session management

1. Dedicated EPS bearer context activation
2. EPS bearer context modification
3. EPS bearer context deactivation
4. UE requested PDN connectivity
5. UE requested PDN disconnect
6. UE requested bearer resource allocation
7. UE requested bearer resource modification

Summary:

The user plane protocol stacks of the LTE-Uu are:

PDCP
RLC
MAC
PHY
For the control plane, the protocol stack is comprised of:

NAS
RRC
RLC
MAC
PHY

List Of Tutorials available in this website:

C Programming 20+ ChaptersC++ Programming 80+ Chapters
100+ Solved Coding QuestionsData Structures and Algorithms 85+ Chapters
System design 20+ ChaptersShell Scripting 12 Chapters
4g LTE 60+ ChaptersMost Frequently asked Coding questions
5G NR 50+ ChaptersLinux System Programming 20+ chapters
Share
Email
Tweet
Linkedin
Reddit
Stumble
Pinterest
Prev Article
Next Article

About The Author

prodevelopertutorial

Daily we discuss about competitive programming questions, join us at:   Telegram Channel

ProDeveloperTutorial.com

Tutorials and Programming Solutions
Copyright © 2020 ProDeveloperTutorial.com
Get top courses from: Educative.io