Chapter 2

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Chapter 2

  1. 1. SYS102 Chapter 2 – PCU Architecture
  2. 2. Chapter 2 Objectives On completion of this section the student will be able to: • Describe the hardware, software and communication protocols used in the BSS (GPRS) network. • Describe the main software entities of the PCU and their interaction with the BSS software entities. • Describe the download and initialisation process.
  3. 3. Packet Control Unit (PCU)
  4. 4. PCU Cage
  5. 5. Packet Interface Control Processor
  6. 6. PCU System Processor (PSP)
  7. 7. PCU Resource Processor
  8. 8. Initial configuration
  9. 9. Cell INS/OOS
  10. 10. Carrier state changes
  11. 11. Carrier Activation
  12. 12. Mobile Originated Packet Access and Transfer
  13. 13. Mobile Originated Packet Access and Transfer
  14. 14. Mobile Terminated Packet Access and Transfer
  15. 15. Gb Interface
  16. 16. Frame Relay Functional Unit - Transmit and Receive Buffers - NVRAM MAPPING DLCI + GBL - DLCI O PVC STATUS MESSAGES
  17. 17. Gb Functional Unit
  18. 18. Gb Functional Unit
  19. 19. Fault Translation Process
  20. 20. System Audit Process • Monitor the status of the PCU • Three types of Audit process - Site System Audit Process (pSSAP) - Cage System Audit Process (pCSAP) - Device Audit Process • MMI Control (OMC, TTY)
  21. 21. Configuration Management
  22. 22. PCU Central Authority Functions A. Site Initialisation 1. Queries for database for site configuration and equipage. 2. Downloading software to the hardware. 3. Create Software on DPROCS. 4. Creating routing tables. 5. Creating state tables. B. Initiate and Direct Configuration Changes. 1. Hardware. 2. Software. 3. Updating Router. 4. Updating state tables.

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