Which algorithm is used to digitize a voice signal for transmission in a digital circuit-switched network and at which datarate is the voice signal transmitted?

Name the most important components of the GSM Network Subsystem (NSS) and their tasks.

Name the most important components of the GSM radio network (BSS) and their tasks.

How is a BTS able to communicate with several subscribers at the same time?

Which steps are necessary to digitize a speech signal in a mobile device before it can be sent over the GSM air interface?

What is a handover and which network components are involved?

How is the current location of a subscriber determined for a mobile-terminated call and how is the call forwarded through the network?

How is a subscriber authenticated in the GSM network? Why is an authentication necessary?

How is an SMS message exchanged between two subscribers?

Which tasks are performed by the RISC processor and which tasks are performed by the DSP in a mobile device?

How are data stored on the SIM card?

What is CAMEL and for which services can it be used?

What are the differences between circuit-switched and packet-switched data transmission?

What are the advantages of the data transmission over GPRS compared to GSM?

Why are different modulation and coding schemes used?

What is the difference between the GPRS ready state and the GPRS standby state?

Does the GPRS network perform a handover if a cell change is required while data is transferred?

Which are the new network elements that have been introduced with GPRS and what are their responsibilities?

What is a temporary block flow?

What actions are performed during an inter-SGSN routing area update (IRAU)?

Why is IP used twice in the protocol stack of the Gn interface?

Why is it not necessary to change any settings on the mobile device for GPRS when roaming abroad?

What is the difference between a GPRS attach and a PDP context activation?

Why is an Access Point Name (APN) necessary for the PDP context activation procedure?

How are MMS messages sent and received via GPRS?

Name the different parts of an MMS message

What are the main differences between the GSM and UMTS radio network?

What advantages does the UMTS radio network have compared to previous technologies for users and network operators?

What were the datarates for a packet-switched connection that were offered by early Release 99 UMTS networks?

What does OVSF mean?

Why is a scrambling code used in addition to the spreading code?

What does ‘cell breathing’ mean?

What are the differences between the Cell-DCH and the Cell-FACH RRC states?

In which RRC states can a mobile device be in PMM connected mode?

How is a UMTS soft handover performed and what are the advantages and disadvantages?

What is an SRNS relocation?

How is the mobility of a user managed in Cell-FACH state?

What is the compressed mode used for?

What are the basic HSDPA concepts to increase the user datarate?

How is a circuit-switched voice connection handled during an ongoing HSDPA session?

What are the advantages of the Enhanced-DCH (E-DCH) concept?

Which options does the Node-B have to schedule the uplink traffic of different E-DCH mobile devices in a cell?

How many subcarriers are used for a 10-MHz FDD LTE channel?

What is the difference between an S1 and an X2 handover?

Describe the differences between the tasks for the MME and the tasks of the Serving Gateway.

What is a resource block (RB)?

How does a mobile device get access to the Physical Uplink Shared Channel?

What are the differences between ARQ and HARQ?

What is the difference between a default and a dedicated bearer?

What is the purpose of DRX in RRC Connected state?

How is mobility controlled in RRC Idle state?

What is the difference between a Cell Change Order and a Handover?

How can the LTE core network be interconnected with legacy core networks and why should this be done?

What is CS fallback?

What is the big disadvantage of Internet-based voice services compared to network operator-based voice services?

Describe different options for the backhaul connection of the eNode-B.