Value Chain Analysis

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- User plane radio bearers (RBs) and signalling radio bearers (SRB)

- PSS and SSS in LTE

- random access and attach procedures

- Slot synchronization and frame synchronization

- Static scheduler, semi-static scheduler and dynamic scheduler

- Data transmission in DL and UL.

- DM-RS vs SRS

Why are PSS, SSS and BCH carried on the 6 centre Resource Blocks (RBs)?

6.

Detailed timing diagrams will not be tested.

Briefly define the following (using suitable diagrams if possible). What/Why/How/Where/When

a) Attach procedure b) tracking area update procedure c) service request procedure d) detach procedure e) EPS bearer f) GUTI

What are important differences between the following concepts in LTE

- Static data vs dynamic data in USIM

- SIM vs USIM vs ISIM

- IMSI vs M-TMSI vs GUTI

- IMSI vs MSISDN

- LAI vs APN

- IMSI attach vs GUTI attach

- Idle mode vs active mode in LTE

- UE-initiated detach and MME-initiated detach

- Radio bearer vs S1 bearer vs S5/S8 bearer

Briefly explain why we need the following in an LTE? Do NOT define the terms

USIM, LAI, APN,

What is TAU? When is it performed? Where is it performed? Why is it performed?

7.

Why is there a need for QoS in LTE? Briefly explain of QoS is implemented in LTE?

Briefly define the following (using suitable diagrams if possible). What/Why/How/Where/When

(a) Default bearer (b) Dedicated bearer c) SDF d) Packet marking e) QCI f) TFT

What are important differences between the following concepts

- QoS in LTE and UMTS

- default and dedicated bearer.

- GBR vs Non-GBR

- APN-AMBR vs UE-AMBR

- ARP vs PDB vs PLR

- Packet marking vs packet filtering

- Mobile originate call and mobile terminated call

Briefly explain how each of the following is used in an LTE network. Do NOT define the terms

QCI, ARP, PDB, PELR

8..

What is EMM? What is ECM?

- Why is there a need for MM in mobile networks?

- Distinguish between the two EMM states : EMM-Deregistered and EMM-Registered States? What causes a change between these states?

- Distinguish between the two ECM states: ECM-IDLE and ECM-CONNECTED? What causes a change between these states?

- Which ECM and EMM states are relevant to the following? (a) handover (b) paging (c) TA update (d) mobile switched off

- Distinguish between RRC states : RRC-Idle and RRC-Connected.

- What is a handover? Why is there a need for handover?

- Explain the statement "handover in LTE is network controlled and UE assisted"?

- What types of handovers are possible in LTE?

- What happens in an intra e-UTRAN handover to the radio link, user plane, control pane?

- Draw a timing diagram to show the exchange of messages during an intra e-UTRAN handover?

- Why are measurements performed before a handover decision is made?

- Why is there a need for admission control in the target eNB during a handover?

- Explain " LTE handover are called break before make."

- Explain "So when UE is actively connected to the network the states in UE/network are RRC Connected, ECM Connected and EMM Registered."

- Why is there a need for paging? In which cells are paging messages to a UE sent? Why?

- How is the UE aware of paging messages?

- Explain the following " there is one paging occasion per DRX cycle"

- What happens after a UR receives a paging message?

- Explain how a UE in idle mode performs cell reselection?

-- Draw a diagram to illustrate three ways that a LTE/UMTS handover can be routed.

- IGNORE : Section 5: I-RAT HO

- What are advantages of handover for PS services compared to CS services?

- IGNORE 6 Example: UTRAN -> E-UTRAN HO

7. Cell Selection: What is it? When it is it performed? Who performs it? How is it performed? Why is it performed?

- Cell Reselection: What is it? When it is it performed? Who performs it? How is it performed? Why is it performed?

- What are the differences between cell selection and cell reselection?

IGNORE 8. Alternative to HO: Cell reselection

9. Roaming

What are two possibilities for LTE roaming.

10. Security Management:

What