Which of the following is also referred to as the function of forward voice channel?
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Advanced Mobile Phone Service (AMPS) is a standard system for Analog signal cellular telephone service in the United States and is also used in other countries. It is based on the initial electromagnetic radiation spectrum allocation for cellular service by the Federal Communications Commission (FCC) in 1970. Introduced by AT&T in 1983, AMPS became one of the most widely deployed cellular system in the United States. Show AMPS allocates frequency ranges within the 800 and 900 Megahertz (MHz) spectrum to cellular telephone. Each service provider can use half of the 824-849 MHz range for receiving signals from cellular phones and half the 869-894 MHz range for transmitting to cellular phones. The bands are divided into 30 kHz sub-bands, called channels. The receiving channels are called reverse channels and the sending channels are called forward channels. The division of the spectrum into sub-band channels is achieved by using frequency division multiple access (FDMA). The signals received from a transmitter cover an area called a cell. As a user moves out of the cell's area into an adjacent cell, the user begins to pick up the new cell's signals without any noticeable transition. The signals in the adjacent cell are sent and received on different channels than the previous cell's signals to so that the signals don't interfere with each other. The analog service of AMPS has been updated with digital cellular service by adding to FDMA a further subdivision of each channel using time division multiple access (TDMA). This service is known as digital AMPS (D-AMPS). Although AMPS and D-AMPS originated for the North American cellular telephone market, they are now used worldwide with over 74 million subscribers, according to Ericsson, one of the major cellular phone manufacturers. This was last updated in June 2006 Continue Reading About Advanced Mobile Phone Service (AMPS)
Dig Deeper on Mobile infrastructure
A cellular network or mobile network is a communication network where the link to and from end nodes is wireless. These base stations provide the cell with the network coverage which can be used for transmission of voice, data, and other types of content. Practice MCQ are given below try to solve it so you can get certain idea about this subject related MCQ. This all MCQ collected from different textbooks, website etc., 1. Which of the following is not a characteristic of cellular telephone system? a) Accommodate a large number of users b) Large geographic area c) Limited frequency spectrum d) Large frequency spectrum Answer- d 2. What is the responsibility of MSC in cellular telephone system? a) Connection of mobile to base stations b) Connection of mobile to PSTN c) Connection of base station to PSTN d) Connection of base station to MSC Answer- b 3. Who has the responsibility of billing and system maintenance function in cellular system? a) Base Station b) PSTN c) MSC d) Mobile system Answer- c 4. What is the function of FVC (Forward Voice Channel)? a) Voice transmission from base station to mobiles b) Voice transmission from mobile to base station c) Initiating mobile calls d) Broadcast all traffic request for all mobile Answer- a 5. Which two channels are responsible for initiating mobile calls? a) FVC and FCC b) FVC and RVC c) FCC and RCC d) FCC and RVC Answer- c 6. Of the total channels present in the cellular system, what is the percentage of voice and control channels? a) 95% voice channels, 5% control channels b) 5% voice channels, 95% control channels c) 50% voice channels, 50% control channels d) 25% voice channels, 75% control channels Answer- a 7. What is MIN? a) Subscriber’s telephone number b) Paging message c) Traffic request number d) Mobile Internet Answer- a 8. What is transmitted along with the call initiation request during the origin of call by a mobile? a) MIN b) ESN c) ESN and SCM d) MIN, ESN and SCM Answer- d 9. What does SCM indicates? a) Maximum receiver power level for a particular user b) Maximum transmitter power level for a particular user c) Minimum receiver power level for a particular user d) Minimum transmitter power level for a particular user Answer- b 10. What is the shape of the cell present in the cellular system? a) Circular b) Square c) Hexagonal d) Triangular Answer- c 11. Why the size of the cell is kept small in cellular network? a) Increase capacity b) Decrease capacity c) Increased size of base station electronics d) Slow process of handoffs Answer- a 12. What is handoff? a) Forward channel b) Switching technique c) Roamer d) Guard channel Answer- b 13. Which one is not an advantage of using frequency reuse? a) Increased capacity b) Limited spectrum is required c) Same spectrum may be allocated to other network d) Number of base stations is reduced Answer- d 14. The process of transferring a mobile station from one base station to another is ____________ a) MSC b) Roamer c) Handoff d) Forward channel Answer- c 15. The interference between the neighbouring base stations is avoided by ____________ a) Assigning different group of channels b) Using transmitters with different power level c) Using different antennas d) Using different base stations Answer- a 16. The mechanism behind electromagnetic wave propagation cannot be attributed to ___________ a) Reflection b) Diffraction c) Scattering d) Sectoring Answer- d 17. The propagation model that estimates radio coverage of a transmitter is called ___________ a) Large scale propagation model b) Small scale propagation model c) Fading model d) Okumura model Answer- a 18. Propagation model that characterize rapid fluctuation is called _________ a) Hata model b) Fading model c) Large scale propagation model d) Okumura model Answer- b 19. Small scale propagation model is also known as _________ a) Fading model b) Micro scale propagation model c) Okumura model d) Hata model Answer- a 20. Free space propagation model is to predict ______ a) Received signal strength b) Transmitted power c) Gain of transmitter d) Gain of receiver Answer- a 21. Which of the following do not undergo free space propagation? a) Satellite communication system b) Microwave line of sight radio links c) Wireless line of sight radio links d) Wired telephone systems Answer- d 22. The free space model predicts that received signal decays as a function of _________ a) Gain of transmitter antenna b) T-R separation c) Power of transmitter antenna d) Effective aperture of the antenna Answer- b 23. Relation between gain and effective aperture is given by ______ a) G=(4πAe)/λ2 b) G=(4π λ2)/Ae c) G=4πAe d) G=Ae/λ2 Answer- a 24. Relation between wavelength and carrier frequency is _________ a) λ=c/f b) λ=c*f c) λ=f/c d) λ=1/f Answer- a 25. Which of the following antenna radiates power with unit gain uniformly in all directions? a) Directional antenna b) Dipole antenna c) Isotropic antenna d) Loop antenna Answer- c 26. EIRP is abbreviated as __________ a) Effective isotropic radiated power b) Effective isotropic radio power c) Effective and immediate radiated power d) Effective and immediate ratio of power Answer- a 27. Path loss in free space model is defined as difference of ________ a) Effective transmitted power and gain b) Effective received power and distance between T-R c) Gain and received power d) Effective transmitter power and receiver power Answer- d 28. Far field region is also known as _________ a) Near field region b) Fraunhofer region c) Erlang region d) Fresnel region Answer- b 29. Fraunhofer distance is given by _____ a) 2D2/λ b) 2D/λ c) D/λ d) 2D/λ2 Answer- a 30. Which of the following is called an ideal antenna? a) Dipole antenna b) Directional antenna c) Isotropic antenna d) Loop antenna Answer- c 31. OFDMA stands for ________ a) omnidirectional frequency division multiple access b) orthogonal frequency duplex multiple access c) orthogonal frequency divider multiple access d) orthogonal frequency division multiple access Answer- d 32. Why is a cyclic prefix required in an OFDMA? a) To ensure symbol time is an integer number b) To help overcome multipath and ISI c) To maintain orthogonality d) To make OFDMA scalable Answer- b 33. What does the DC subcarrier indicate? a) Identity of the cell b) Antenna configuration c) Center of OFDM channel d) Format of data channel Answer- c 34. What processing step combines multiple OFDM subcarriers into a single signal for transmission? a) FFT b) IFFT c) RF combining d) Channel mapping Answer- b 35. Which property of OFDMA system allows adjacent subcarriers to be used without interference? a) Orthogonality b) Orthodoxy c) Octagonality d) Originality Answer- a 36. In OFDMA, what is the relationship between the subcarrier spacing f and symbol time t? a) f=t b) f=1/2t c) f=1/t d) no relation Answer- c 37. OFDM is a technique for 3G mobile communication. a) True b) False Answer- b 38. OFDM uses complex equalizers. a) True b) False Answer- b 39. When we divide band of Orthogonal Frequency Division Multiplexing (OFDM) into sub bands, it diminishes effects of __________ a) noise b) collision c) interference d) signals absence Answer- c 40. Common data rates of IEEE 802.11 OFDM are ____________ a) 18 Mbps b) 200 Mbps c) 50 Mbps d) 54 Mbps Answer- a 41. Which of the following has no backward compatibility with 3G Cdma2000? a) IS-95 b) GPRS c) IS-95A d) IS-95B Answer- b 42. 2G and 2.5G CDMA operators may selectively introduce 3G capabilities at each cell without changing entire base stations and reallocate spectrums. a) True b) False Answer- a 43. Which of the following the first 3G CDMA air interface? a) IS-95 b) IS-95B c) Cdma2000 1xRTT d) CdmaOne Answer- c 44. Within ITU IMT-2000 body, Cdma2000 1xRTT is also known as ____________ a) Cdma2000 1xEV-DO b) Cdma2000 1xEV-DV c) IS-95B d) G3G-MC-CDMA-1X Answer- d 45. How many users are supported by Cdma2000 1X in comparison to 2G CDMA standard? a) Half b) Twice c) Six times d) Ten times Answer- b 46. Cdma2000 works in TDD mode only. a) True b) False Answer- b 47. Which of the following is not a characteristic of Cdma2000? a) Adaptable baseband signaling rates b) Adaptable baseband chipping rates c) Multicarrier technologies d) OFDMA Answer- d 48. Cdma2000 1xEV was developed by ________ a) Motorola b) AT&T Laboratories c) Qualcomm d) NTT Answer- c 49. How is bandwidth increased in Cdma2000? a) Clubbing adjacent radio channels b) Changing the hardware of base stations c) Change of spectrum d) Change of RF equipment Answer- a 50. What are the two options provided by Cdma2000 1xEV? a) Cdma2000 1xRTT. Cdma2000 3xRTT b) Cdma2000 1xEV-DO, Cdma2000 1xEV-DV c) Cdma2000 1xEV-DT, Cdma2000 1xEV-DO d) Cdma2000 1xRTT, Cdma2000 1xEV-DV Answer- b 51. Which of the following is not backward compatible with Cdma2000? a) Cdma2000 1xRTT b) Cdma2000 3xRTT c) Cdma2000 1xEV-DO d) Cdma2000 1xEV-DT Answer- c 52. Paging system uses which mode of transmission? a) Full duplex b) Simplex c) Half Duplex d) Duplex Answer- b 53. The information sent by paging system is known as a ___________ a) Note b) Line c) Message d) Page Answer- d 54. Which type of message cannot be sent with the help of paging system? a) Alphanumeric message b) Video message c) Voice message d) Numeric message Answer- b 55. What is a paging access number? a) An e mail id b) A username c) A toll free telephone number d) A registration number Answer- c 56. Which type of transmission technique is employed by paging system? a) Simulcasting b) Multicasting c) Unicasting d) Hybrid Answer- a 57. Which of the following is not the property of paging system? a) Asymmetric communication b) Light weight c) High cost d) Wide area coverage Answer- c 58. Which of the following properties describes the transmitters and receivers in paging system? a) High complexity and high power transmitter, high complexity and high power receivers b) Low complexity and low power transmitter, low complexity and low power receivers c) Low complexity and low power transmitter, high complexity and high power receivers d) High complexity and high power transmitter, low complexity and low power receivers Answer- d 59. What is a pager in the paging system? a) A transmitter b) A receiver c) A transceiver d) An equalizer Answer- b 60. Who introduced the paging system for the first time? a) Al Gross b) Teri Pall c) Alexander Graham Bell d) Martin Cooper Answer- a 61. __________ carries digitally encoded user data. a) Traffic channels b) Control channels c) Signalling channels d) Forward channels Answer- a 62. ____________ carries signalling and synchronizing commands. a) Traffic channels b) Control channels c) Signalling channels d) Forward channels Answer- b 63. Which of the following is not a control channel of GSM? a) BCH b) CCCH c) DCCH d) TCH Answer- d 64. Which of the following is the forward control channel that is used to broadcast information? a) BCCH b) CCCH c) DCCH d) TCH Answer- a 65. Which of the following channel does not come under CCCH? a) PCH b) RACH c) DCCH d) AGCH Answer- c 66. Which of the following channel provides paging signals from base station to all mobiles in the cell? a) RACH b) AGCH c) DCCH d) PCH Answer- d 67. ___________ is a reverse link channel used by a subscriber unit to acknowledge. a) RACH b) AGCH c) DCCH d) PCH Answer- a 68. Which of the following channel is used by base station to provide forward link communication to mobile? a) RACH b) AGCH c) DCCH d) PCH Answer- b 69. Which of the following burst is used to broadcast the frequency and time synchronization control messages? a) FCCH and SCH b) TCH and DCCH c) RACH and TCH d) FCCH and DCCH Answer- a 70. Which of the following burst is used to access service from any base station? a) TCH b) RACH c) SCH d) FCCH Answer- b 71. Group of superframes in GSM is called multiframe. a) True b) False Answer- b 72. Handoff does not require voice and control channel to be allocated to channels associated with the new base station. a) True b) False Answer- b 73. The time over which a call can be maintained within a cell without handoff is called _________ a) Run time b) Peak time c) Dwell time d) Cell time Answer- c 74. Dwell time does not depend on which of the following factor? a) Propagation b) Interference c) Distance between subscriber and base station d) Mobile station Answer- d 75. Which of the following is associated with the handoff in first generation analog cellular systems? a) Locator receiver b) MAHO c) Cell dragging d) Breathing cell Answer- a 76. MAHO stands for ______ a) MSC assisted handoff b) Mobile assisted handoff c) Machine assisted handoff d) Man assisted handoff Answer- b 77. A handoff is initiated when the power received from the base station of a neighbouring cell falls behind the power received from the current base station by certain level. a) True b) False Answer- b 78. What is the condition for intersystem interference? a) Mobile moves from one cell to another cell b) Mobile remains in the same cell c) Mobile moves from one cellular system to another cellular system d) Mobile remains in the same cluster Answer- c 79. What is the disadvantage of guard channel? a) Efficient utilization of spectrum b) Cross talk c) Near far effect d) Reduce total carried traffic Answer- d 80. Which of the following priority handoff method decrease the probability of forced termination of a call due to lack of available channels? a) Queuing b) Guard channel c) Cell dragging d) Near far effect Answer- a 81. Umbrella cell approach is possible by using _________ a) Antenna of same heights b) Antenna of different heights c) Different voice channels d) Different control channels Answer- b 82. Cell dragging is a problem occur due to __________ a) Pedestrian users b) Stationary users c) High speed mobile systems d) Base stations having same frequency Answer- a 83. What was the typical handoff time in first generation analog cellular systems? a) 1 second b) 10 seconds c) 1 minute d) 10 milliseconds Answer- b 84. How much time it takes for handoff in digital cellular systems like GSM? a) 1 second b) 10 seconds c) 1 minute d) 10 milliseconds Answer- a 85. Soft handoff is also known as _________ a) MAHO b) Hand over c) Break before make d) Make before break Answer- d 85. Which of the following scheme is used by Bluetooth? a) Frequency hopping TDD scheme b) Frequency hopping FDD scheme c) DSSS TDD scheme d) DSSS FDD scheme Answer- a 86. What is the range of time slot in Bluetooth? a) 120 milliseconds b) 625 microseconds c) 577 microseconds d) 5.7 seconds Answer- b 87. Which modulation scheme is used by Bluetooth? a) DQPSK b) MSK c) GFSK d) BPSK Answer- c 88. What is the channel symbol rate in Bluetooth for each user? a) 270.833 Kbps b) 1 Gbps c) 100 Mbps d) 1 Mbps Answer- d 89. What is the raw channel bit error rate of Bluetooth? a) 10-3 b) 10-10 c) 103 d) 10-1 Answer- a 90. Which of the following standard committee specifies Bluetooth and other Personal Area Networks (PAN)? a) IEEE 802.11b b) IEEE 802.15 c) IEEE 802.11g d) IEEE 802.16 Answer- b 91. Several protocols for upper layers in bluetooth use _________ a) UDP b) HSP c) ITC d) L2CAP Answer- d 92. Protocols are set of rules to govern _________ a) Communication b) Standard c) Metropolitan communication d) Bandwidth Answer- a 93. An internet is a __________ a) Collection of WANS b) Network of networks c) Collection of LANS d) Collection of identical LANS and WANS Answer- b 94. Checksum is used in Internet by several protocols although not at the _________ a) Session layer b) Transport layer c) Network layer d) Data link layer Answer- d 95. In version field of IPv4 header, when machine is using some other version of IPv4 then datagram is __________ a) Discarded b) Accepted c) Interpreted d) Interpreted incorrectly Answer- a 96. Network layer at source is responsible for creating a packet from data coming from another ________ a) Station b) Link c) Node d) Protocol Answer- d 97. Header of datagram in IPv4 has _________ a) 0 to 20 bytes b) 20 to 40 bytes c) 20 to 60 bytes d) 20 to 80 bytes Answer- c 98. In IPv4 layer, datagram is of ________ a) Fixed length b) Variable length c) Global length d) Zero length Answer- b 99. In IPv4, service type of service in header field, first 3 bits are called ______ a) Type of service b) Code bits c) Sync bits d) Precedence bits Answer- d 100. Which is a link layer protocol? a) ARP b) TCP c) UDP d) HTTP Answer- b What is the function of forward voice channel?Forward Voice Channel (FVC): Used for voice transmission from BS to MS. Reverse Voice Channel (RVC): Used for voice transmission from MS to BS. Forward Control Channel (FCC): Used for initiating a call from BS to MS.
What is handoff Mcq forward channel?Explanation: Handoff is the process of changing the channel associated with current connection while a call is in progress.
Which of the following are the examples of mobile communication systems?A mobile phone (also called mobile cellular network, cell phone or hand phone) is an example of mobile communication (wireless communication).
Which of the following is also known as the developer of the world's first cellular system?Martin Cooper (inventor). |
