WIRELESS - GSM

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Across
  1. 1. This service allows a subscriber to define a number to which calls are forwarded if he is already engaged in a call when a second call comes in
  2. 4. The BSC is also able to control the output of the base station.
  3. 7. In IMT-DS the ______ spread technology comprises wideband CDMA (W-CDMA) systems.
  4. 9. This file type is similar to the linear fixed file type but contains an additional pointer that points to the last modified record. Once the pointer reaches the last record of the file, it wraps over again to the first record of the file. This format is used, for example, for the file in which the phone numbers, which have previously been called, are stored.
  5. 11. The Random Access Channel (RACH) is the only common channel in the __________ direction
  6. 12. At the beginning and end of each burst, another well-known bit pattern is sent to enable the receiver to detect the beginning and end of a burst correctly. These fields are called _______
  7. 13. This part of the IMSI is the national part of a subscriber’s home network identification. A national identification is necessary because there are usually several independent mobile networks in a single country
  8. 15. Once the connection has been established, the conversation is then transparently transmitted via the __________ matrix between the two parties.
  9. 16. The ___________ domain is shared among all users and offers UMTS services to all accepted users
  10. 18. The _______ equipment domain is assigned to a single user and comprises all the functions that are needed to access UMTS services. Within this domain are the USIM domain and the mobile equipment domain.
  11. 20. This file type contains records of a fixed length and is used, for example, for the file that contains the telephone book records.
Down
  1. 2. GSM reuses much of the _________ -line technology that was already available at the time the standards created.
  2. 3. _____________does not spread the chip sequence any further but XORs chips based on a code.
  3. 5. The Base Station Subsystem (BSS), which is also called _________ _______________, contains all nodes and functionalities that are necessary to wirelessly connect mobile subscribers over the radio interface to the network.
  4. 6. Allows subscribers to establish conference bridges with up to six subscribers
  5. 8. This functionality is used to accept an incoming call during an already active call or to start a second call
  6. 10. handles connection setup, release, and negotiation.
  7. 14. The _______ network domain can be separated into three domains with specific tasks.
  8. 17. if this service is activated, a number can be configured to which all incoming calls are forwarded immediately
  9. 19. The file is seen as a sequence of bytes. The file for the IMSI, for example, is of this format. How the mobile device has to interpret the content of the files is again specified in 3GPP TS 31.002
  10. 21. to reduce the interference on the air interface and to increase the operating time of the mobile device, data bursts are only sent if a speech signal is detected. This method is called __________ transmission