Crossword puzzles on the topic of GSM architecture, GSM frame structure and GSM Security

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Across
  1. 2. Frequency separation between uplink/downlink.
  2. 4. Network element handling authentication
  3. 5. . Burst type for synchronization
  4. 6. . Physical layer unit (8 time slots)
  5. 7. . Mobile identity sent during authentication.
  6. 8. . Multiple access technique in GSM
  7. 9. Temporary ID replacing IMSI for privacy
  8. 10. . Ciphering key for encryption
  9. 12. Logical channel for paging mobiles
  10. 13. Core network element storing subscriber data
  11. 14. Encryption algorithm securing GSM calls
Down
  1. 1. Duration of one GSM frame in milliseconds
  2. 3. . Process verifying a subscriber’s identity.
  3. 9. Channel carrying voice/data
  4. 11. Logical channel for broadcasting system info