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1、INTRODUCTION TO MOBILE TELECOMMUNICATIONSAND GSM1. The GSM frequency bands are:a) GSM at 800 and 1800 MHzb) GSM at 800, 900, 1800 and 1900 Mhzc) GSM at 900, 1800 and 1900 MHz2. MOU stands for:a) Mobile Operating Unitb) MObile Union (of GSM)c) Memorandum Of Understanding3. Only one of the following s
2、tatements is true, which one?GMSC functionality is invoked fora) all mobile terminated callsb) all voice calls from mobile stationsc) only those subscribers who have moved location aread) all mobile originated calls4. Only one of the following statements is true, which one?The HLR location informati
3、on is always updated whena) the subscriber changes location areab) the MS is switched onc) the subscriber changes MSC Service Area5. Which of the following events occur when the MS is turned ona) The MS scans all GSM frequencies looking for specialchannels called control channels and tunes to the st
4、rongest oneb) The MS registers with the network and the status is changedto idle.c) If the present LA is different from the stored LA, a locationupdate takes placeOVERVIEW OF ERICSSONS GSM SYSTEMS1. Which Ericsson product is a BTS part of?_2. What network management product is Ericssons OSS based on
5、?_3. Name any two of the most important management areas defined by TMN._4. What Ericsson product is used to implement a message center?_5. Briefly explain the function of the Service Order Gateway (SOG)._6. What is the task of the Gateway?_7. What is the main task of the Mobile services Switching C
6、entre (MSC)?_8. What type of information is stored in the Home Location Register (HLR)and the Visitor Location Register (VLR)? What is the main difference?_9. What is the task of the Authentication Centre (AUC)?_10. What is a Subscriber Identity Module (SIM)? What is it used for?_11. Which node is t
7、o be informed if A) the Mobile Equipment B) the SIM-cardis stolen?_12. Which node does not belong to the Switching System?A) AUC B) BSC C) MSC13. True and false about the Base Station Controller (BSC) and The BaseTransceiver Station (BTS):a) The Base Transceiver Station (BTS) decides when to do a ha
8、ndover._b) The Base Transceiver Station (BTS) handles the radio connection in acell._14. Can more than one Public Land Mobile Network (PLMN) exist in the samearea?_15. Can a Location Area (LA) belong to more than one Base StationController (BSC)?_16. Name 3 of the additional nodes that can be added
9、to a GSM networkWIRELESS CONCEPTS & CHAPTER 4B: CHANNELCONCEPTS1. Which frequency band does the Mobile Station (MS) use for A) ransmissionto B) reception from the Base Transceiver Station (BTS)?_2. Which frequency does the Base Transceiver Station (BTS) use fortransmission on the downlink if it uses
10、 905 MHz for reception on the uplink?_3. Which is the next higher frequency in GSM to 905 MHz?_4. What is the main difference between Frequency Division Multiple Access(FDMA) and Time Division Multiple Access (TDMA)?_5. In GSM there are _ patterns of frequency hopping. There are _frequencies per cha
11、nnel group (when synthesized hopping is used)6. Combine each statement with the proper digit from the selection below:A) There are _ duplex carriers in GSM.B) Each carrier is shared by up to _ users.C) Information is sent in frames which last _ ms.D) Each frame is divided into 8 Time Slots, each with a duration of _ms.E) In each Time Slot _ bits are sent.F) Each bit
