UMTS Signalling 2 Test Answer

7/28/2019 UMTS Signalling 2 Test Answer

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Q.1) I. The transport plane of Iu-CS, Iur and Iub interfaces are similar. II. The Iu-PS

interface does not use AAL2 in its transport plane.

A. Both statements are true (Your Answer)B. Both statements are false

C. Only the first statement is trueD. Only the second statement is true

Explanation

In the Iu-PS interface, only AAL5 is used. In other respects, the transport plane issimilar as in the Iu-CS, Iur and Iub interfaces.

Correct

Q.2) The control plane in Iub consists of Node B Control Port, which maintains the O&M

connection-related signaling between the BS and the RNC, and the CommunicationControl Ports, which are used for traffic-related signaling.

A. True (Your Answer)B. False

CorrectQ.3) Iu is to RANAP as Iur is to __________.

RNSAP(Your Answer)Possible correct answers:

RNSAP

Correct

Q.4) What do you call the layer 3 of the Uu interface that contains functions needed for

the transport plane control?

A. Radio Link Control

B. Radio Resource Control (Your Answer)C. Radio Network ControllerD. Media Access Control

Correct

Q.5) To offer connection-oriented and connectionless services within a CCS7environment, Signaling Connection Control Part (SCCP) protocol is required.


Incorrect

Q.6) Bearer allocation always start from the RAN side.


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A. True (Your Answer)B. False (Correct Answer)Explanation

From the CN side.Incorrect

Q.7) I. Dedicated NBAP procedures are used to create new UE contexts and to controlBCCH broadcast information. II. The Iub interface always contains one signaling

link for common NBAP procedures and there may be several signaling links for

dedicated NBAP procedures.

A. Both statements are true (Your Answer)B. Both statements are falseC. Only the first statement is trueD. Only the second statement is true (Correct Answer)Explanation

Option I should be for Common NBAP procedures.

Incorrect

Q.8) The CCS7 signaling connections are usually 64 kb/s timeslotes of the Pulse Code

(PCM) trunk.

A. True (Correct Answer)B. False (Your Answer)

Incorrect

Q.9) Aside from the common elements, FISU does not have other elements in its frame.


Incorrect

Q.10) I. A maximum number of 32 signaling links can be contained in a Signaling Link

Set. II. A group of SLS is called a Route Set.

A. Both statements are true (Your Answer)

B. Both statements are falseC. Only the first statement is trueD. Only the second statement is true (Correct Answer)

ExplanationA maximum of 16 signaling links only.Incorrect

Q.11) I. Concerning the transport plane, in UMTS, it provides variable-speed packet type

of transmission media over constant-bit-rate (bandwidth) physical layer. II. Thetransport plane must used different adaptation layers in order to handle different

QoS requirements.


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A. Both statements are true (Correct Answer)B. Both statements are falseC. Only the first statement is true (Your Answer)D. Only the second statement is true

Correct

Q.12) The parameter used for releasing RAB in the PS domain is: - Network LayerService Access Point Identifier (NSAPI) - Release Cause


Correct

Q.13) Regarding the common elements in CCS7 formats: The Check Bits (CK) form a 16-

bit check sum over the signaling unit from BSN up to excluding the CK field.


Correct

Q.14) In the Uu interface's transport plane, the Radio Link Control (RLC) mainly

performs flow control-related activitied such as instance data block sequencing.


Correct

Q.15) The parameters used for RAB setup/modificationin the CS domain are: - Bearer ID

- AAL2 ID - Binding ID (transport)


Incorrect

Q.16) The signaling related to on UE and its connection establishment is called

__________.

A. UE connection

B. UE context (Correct Answer)C. UE signaling (Your Answer)D. UE termination

Incorrect

Q.17)NBAP needs convergence protocols to work on top of AAL5.


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Incorrect

Q.18) RAB assignment in UMTS only involves two messages: RAB Assignment Request

from the RNC and RAB Assignment Complete from the CN.


The CN requests and the RNC completes.Correct

Q.19) The parameter used for keeping RAB in the PS domain is: - Network Layer ServiceAccess Point Identifier (NSAPI)


Correct

Q.20) Convergence protocols are required to make RNSAP suitable over AAL5 for the

control plane.

A. True (Your Answer)

B. FalseCorrect

Q.21) The SLC or Signaling Link Set (SLS) should be the same in both ends of the

signaling link.


Correct

Q.22) The parameter used to keep RAB in the CS domain is: - Bearer ID


B. FalseIncorrect

Q.23) In the Uu interface's transport plane, the Radio Link Control (RLC) sublayer

physically implements radio link management tasks, such as, radio link set-up,maintaining the physical radio channel configuration, error protection, encryption,

and radio link deletion.



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B. False (Correct Answer)Explanation

It is the MAC layer.

Incorrect

Q.24) The UE context covers signaling procedures related to the communication betweenthe UE and the network, like network access and user data transfer. What are the

channels used for network access?

A. RACH (Your Answer)B. FACH (Missed)C. BCH (Your Answer)

D. PCHCorrect

Q.25)

The diagram

above is the control plane structure of the RNC connecting over Iu-PS. What AALtype is indicated by the question mark?

A. AAL2


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B. AAL1C. AAL3/4D. AAL5 (Your Answer)

Incorrect

Q.26) In the originating signaling node, the routing entity on the MTP level is calledSignaling Route Set, which is the collection of the signaling routes, through which a

certatin SPC can be achieved.


Incorrect

Q.27) Regarding common elements of CCS7: I. Forward Sequence Number (FSN) /

Forward Indicator Bit (FIB) is only useful for Message Signaling Unit types. II. FIBindicates the start of a retransmission (reaction to negative acknowledgement) when

the FIB changes. III. An alternating FIB indicates that new MSU frames will come.

Tick all that is TRUE.

A. I (Missed)B. II (Your Answer)C. IIIExplanation

In Option III, it should be constant FIB.

Incorrect

Q.28) Regarding common elements of CCS7: I. Backward Sequence Number (BSN) /

Backward Indicator Bit (BIB) are used for acknowledgement. II. BSN/BIB is the

sequence number to label the MSU. III. The BSN indicates the number of the MSUthat is expected next. IV. An alternating BIB indicates a positive acknowledgement,

while a constant BIB indicates a negative acknowledgement. Tick all that is TRUE.

A. I (Missed)B. IIC. III (Your Answer)D. IV (Your Answer)

Explanation

Option II is a definition of Forward Sequence Number/Forward Indicator Bit.

In Option IV, alternating BIB indicates negative acknowledgement and constant

BIB indicates positive acknowledgement.Correct

Q.29) Regarding CCS7, two nodes may have direct traffic connections, but the signaling

related to those connections may be handled through other nodes. The signaling

node that handles the rerouting of the messages is call the Signaling Transfer Pointor STP.


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Incorrect

Q.30) The functionality of the RLC in the Uu interface is similar to Layer 2 of other

interfaces.


Correct

Q.31) The physical layer of the Iub interface transport plane could be any media providing

constant bit rate with adequate bandwidth.


B. False

Incorrect

Q.32) Segmentation, retransmission across the air, ciphering of real-time data, and

buffering are all functionalities of the RLC sublayer.


B. False (Correct Answer)Explanation

Ciphering of non-real time data.

Correct

Q.33) In the Iur interface between SRNC and DRNC, the construction of the transportplane is similar as in the Iub.


Incorrect

Q.34) In the Iub interface, it represents the bit streams going through one Communication

Control Port, that is, all control and traffic going through one (WCDMA) TRX.

A. Traffic Termination Point (Correct Answer)

B. Signaling Point CodeC. Signaling Transport Point (Your Answer)

D.None of the choicesCorrect

Q.35) The transport plane of the Uu Interface covers the three lowest layers of the OSI

stack.


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Correct

Q.36) I. An advantage of CCS7 is that it does not have to go along the same path as

speech. II. CCS7 can support both circuit-related and non-circuit-related signaling.

A. Both statements are true (Your Answer)B. Both statements are falseC. Only the first statement is trueD. Only the second statement is true

Correct

Q.37) The parameters used for RAP setup in the PS domain are: - Network Layer ServiceAccess Point Identifier (NSAPI) - CN IP Address - GTP Flow Label


Correct

Q.38) In UMTS Release 99, convergence protocols are required to be primarily based in

CCS7 for RANAP to work on top of AAL5. Samples are MTP and SCCP offering

both connection-oriented and connectionless services for the RANAP over the Iuinterface.


B. FalseCorrect

Q.39) RANAP performs two kinds of activities: connection management between theRNC and CN; and exchange of signaling information on the control plane between

the UE and the CN.


B. False

Correct

Q.40) Access stratum is to transport plane, as serving stratum is to control plane.


Correct

Q.41)NBAP procedures are divided into 2: common and dedicated.


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Incorrect

Q.42) Regarding common elements of CCS7: I. Length Indicator (LI) is used todistinguish between the three signaling unit types. II. If LI=0, then the unit type is

LSSU. III. If LI=1 or 2, then the unit type is MSU. IV. If LI > 2, then the unit typeis FISU V. LI indicates the real length of the data. Tick all that is TRUE.

A. I (Correct Answer)B. II (Your Answer)C. III (Your Answer)D. IV

E. VExplanation

If LI=0, then the unit type is FISU.

If LI=1 or 2, then the unit type is LSSU.

If LI > 2, then the unit type is MSU.LI may not indicate the real length of the data in cases where the length of the MSUis more than 63 octets.

Correct

Q.43) The deletion of the bearer may be initiated either by the RAN or by the core

network.


B. False

Correct

Q.44) Signaling Route is in practice the same as the Signaling Link Set, but the difference

here is that SLS is not aware of the STP whereas the Signaling Route is.


Correct

Q.45) I. Fill-In Signaling Unit (FISU) only contains sequence and indicator bits for

acknowledge purposes; it does not contain any upper-layer information. II. The

signaling channel does not need to be populated all the time that is why if no data

needs to be sent, the signaling node sends FISU.

A. Both statements are trueB. Both statements are falseC. Only the first statement is true (Your Answer)D. Only the second statement is trueExplanation

The signaling channel must be populated all the time!


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Incorrect

Q.46) Which of the following are tasks of the MAC sublayer?

A. Selection of the data to be inserted in the radio frame (Your Answer)

B. Selection of common or dedicated channels (Missed)C. Multiplexing of logical channels into same transport channels (Missed)D. Ciphering of real-time data (Your Answer)

IncorrectQ.47) I. Message Signaling Unit (MSU) is sent when the CCS7 nodes need to negotiate or

change a signaling channel status, or when they have to inform each other aboutother maintenance activities. II. Link Status Signaling Unit (LSSU) is sent when

there is some upper layer information to be delivered.

A. Both statements are true

B. Both statements are false (Correct Answer)

C. Only the first statement is true (Your Answer)D. Only the second statement is trueExplanation

The truth is the reverse. Interchange MSU and LSSU.

Correct

Q.48) The parameters used for RAB releasein the CS domain are: - Bearer ID - ReleaseCause


B. FalseIncorrect

Q.49) The Iub interface transport plane consists of: (Select all that applies)

A. ATM layer(Missed)B. AAL2 (Your Answer)C. AAL5 (Missed)

D. SAAL (Your Answer)E. Physical Layer(Missed)F. AAL3/4

Correct

Q.50) Regarding specific elements of CCS7 formats: The LSSU contains a status field,

one or two octets in length., that is used to indicate the status of the signaling link.


Incorrect


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Q.51) This is used by MSU types to hold MTP 3 data with size N, where 2 < N < 273

octets.

A. Signaling Information Field (Correct Answer)

B. Service Information OctetC. Status Field (Your Answer)

D. Length Indicator

Correct

Q.52) I. MSU contains a data part which contains the MTP level 3 data with either userpart data or MTP level 3 network management messages. II. The size of the MTP

level 3 data is restricted to 273 octets. III. Any longer message must be segmented

by the user part itself. Which of the above items are FALSE?

A. I only

B. II onlyC. III onlyD.None of the choices (Your Answer)

IncorrectQ.53) For Iur and Iub interfaces, the user data goes through the AAL5 layer.


AAL2 is used for user data transfer. AAL5 together with SAAL is used for control

data.

Incorrect

Q.54) In the common elements of CCS7, the flag is used for frame delineation, so it marks

beginning and end of a sinaling unit. The flag has always the unique value '11100111'.

A. True (Your Answer)B. False (Correct Answer)

Explanation

The unique value is '0111 1110'.Incorrect

Q.55) It is an internationally standardized CCS system that is optimized for operation in

digital telecommunication networks such as GSM.

A. CCS4B. CCS5 (Your Answer)C. CCS6

D. CCS7 (Correct Answer)


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Incorrect

Q.56) Signaling Link Set (SLS) is a unique number used to identify a signaling link.

A. True (Your Answer)B. False (Correct Answer)

ExplanationSignaling Link Code

Incorrect

Q.57) User data transfer uses ______ data port or channel in the Iub. the behavior of this

channel is different for different type of calls (CS or PS service).

A. RACH (Your Answer)B. FACHC. DCH (Correct Answer)

D. DSCH

Correct

Q.58) The dedicated connection established over RAN between the UE and the CN is

called Radio Access Bearer.


UMTS Signalling 2 Test Answer

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