IMPLEMENTATION OF BSS AND NSS IN MOBILE COMMUNICATION <br />                      WHAT  <br />IS  <br />      BSS ?<br />W...
GSM Architecture<br />SMSC<br />VMSC<br />GSM <br />Air interface<br />B<br />S<br />AUC<br />A<br />C<br />HLR<br />inter...
<ul><li>Transmission.
Radio Resources management (RR).
Mobility Management (MM).
Communication Management (CM).
Operation, Administration and Maintenance (OAM).</li></ul>FUNCTIONS OF GSM<br />
<ul><li>The Base Station Subsystem (BSS).
 The Mobile Station (MS).
The Network and Switching Subsystem (NSS).
The Operation and Support Subsystem (OSS)</li></ul>THE GSM NETWORK<br />
<ul><li>The heart of a Mobile Network
It connects the Mobile Station and the NSS. It is in charge of the transmission and reception. The BSS can be divided into...
The Base Transceiver Station (BTS) or Base Station.
The Base Station Controller (BSC).</li></ul>INTRODUCTION TO BSS<br />
<ul><li>The mobile equipment or terminal.
The Subscriber Identity Module (SIM).
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Implementation Of Bss And Nss In Mobile Communication

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Implementation Of Bss And Nss In Mobile Communication

  1. 1. IMPLEMENTATION OF BSS AND NSS IN MOBILE COMMUNICATION <br /> WHAT <br />IS <br /> BSS ?<br />WHAT <br /> IS <br />NSS ?<br />
  2. 2. GSM Architecture<br />SMSC<br />VMSC<br />GSM <br />Air interface<br />B<br />S<br />AUC<br />A<br />C<br />HLR<br />interface<br />Abis<br />interface<br />MSC<br />PSTN<br />TRAU<br />VLR<br />B<br />BTS<br />S<br />BTS<br />C<br />EIR<br />BTS<br />OMCS<br />BTS<br />BTS<br />BTS<br />Network and switching<br />subsystem<br />Mobile<br />A interface SS7 / speech<br />X.25<br />Station<br />OMCR<br />SS7<br />Base Station System<br />
  3. 3. <ul><li>Transmission.
  4. 4. Radio Resources management (RR).
  5. 5. Mobility Management (MM).
  6. 6. Communication Management (CM).
  7. 7. Operation, Administration and Maintenance (OAM).</li></ul>FUNCTIONS OF GSM<br />
  8. 8. <ul><li>The Base Station Subsystem (BSS).
  9. 9. The Mobile Station (MS).
  10. 10. The Network and Switching Subsystem (NSS).
  11. 11. The Operation and Support Subsystem (OSS)</li></ul>THE GSM NETWORK<br />
  12. 12. <ul><li>The heart of a Mobile Network
  13. 13. It connects the Mobile Station and the NSS. It is in charge of the transmission and reception. The BSS can be divided into two parts:
  14. 14. The Base Transceiver Station (BTS) or Base Station.
  15. 15. The Base Station Controller (BSC).</li></ul>INTRODUCTION TO BSS<br />
  16. 16. <ul><li>The mobile equipment or terminal.
  17. 17. The Subscriber Identity Module (SIM).
  18. 18. The SIM card is protected by a four-digit Personal Identification Number (PIN). In order to identify the subscriber to the system, the SIM card contains some parameters of the user such as its International Mobile Subscriber Identity (IMSI).</li></ul>Mobile Station (MS)<br />
  19. 19. <ul><li>The Mobile services Switching Center (MSC)
  20. 20. The Gateway Mobile services Switching Center (GMSC)
  21. 21. Home Location Register (HLR)
  22. 22. Visitor Location Register (VLR)
  23. 23. The Authentication Center (AuC)
  24. 24. The Equipment Identity Register (EIR)
  25. 25. The GSM Interworking Unit (GIWU)</li></ul>The Network and Switching Subsystem (NSS)<br />
  26. 26. <ul><li>The OSS is connected to the different components of the NSS and to the BSC, in order to control and monitor the GSM system. It is also in charge of controlling the traffic load of the BSS.
  27. 27. However, the increasing number of base stations, due to the development of cellular radio networks, has provoked that some of the maintenance tasks are transferred to the BTS. This transfer decreases considerably the costs of the maintenance of the system.</li></ul>The Operation and Support Subsystem (OSS)<br />
  28. 28. <ul><li>The components of the BSS and NSS provide the operator with all the information it needs. This information is then passed to the OSS which is in charge of analyze it and control the network.
  29. 29. The self test tasks, usually incorporated in the components of the BSS and NSS, also contribute to the OAM functions.
  30. 30. The BSC, in charge of controlling several BTS, is another example of an OAM function performed outside the OSS.</li></ul>Operation, Administration and Maintenance (OAM)<br />
  31. 31. <ul><li>Call control.</li></ul> a country code<br />a national destination code identifying the subscriber's operator<br />a code corresponding to the subscriber's HLR<br /><ul><li> Supplementary Services management.
  32. 32. Short Message Services management </li></ul>Communication Management (CM)<br />
  33. 33. The user movements can produce the need to change the channel or cell, especially when the quality of the communication is decreasing. This procedure of changing the resources is called handover. Three different types of handovers can be distinguished:<br />* Handover of channels in the same cell.<br />* Handover of cells controlled by the same BSC.<br />* Handover of cells controlled by different MSCs.<br />What is handover and its importance ?<br />
  34. 34. 12<br />Handover Types<br />GMSC<br />MSC<br />BSC<br />BSC<br />C-3<br />BSC<br />MSC<br />C-4<br />C-2<br />C-1<br />BSC<br />
  35. 35. 13<br />Intra BSC handover<br /> HO performed<br />HO required<br />Activate TCH(facch)<br />with HoRef#<br />if <br />1. Check for HO passed<br />2. Channel avail in new BTS<br />Acknowledges and <br />alloctes TCH (facch)<br />Periodic Measurement<br /> Reports<br />MS tunes into new frequency <br />and TS and sends HO message to <br />new BTS (facch)<br />HO cmd with HoRef#<br />Receives new BTS data(FACCH)<br />Release TCH<br /> Periodic Measurement <br />Reports (SACCH)<br />BSC<br />BTS 2<br />Periodic Measurement <br />Reports (SACCH)<br />Cell 2<br />BTS 1<br />Cell 1<br />
  36. 36. <ul><li>Telephony
  37. 37. Emergency calls
  38. 38. Teletex.
  39. 39. Short Message Services
  40. 40. Fax mail.
  41. 41. Voice mail.</li></ul>GSM Services<br />
  42. 42. The aim of this Powerpoint presentation was to deliver the importance and the role of BSS and NSS in GSM network. For the time being there is no other such efficient setup that can take place of BSS and NSS<br />Conclusion<br />
  43. 43. <ul><li>http://www.analysys.co.uk/vlib/mobile.htm
  44. 44. http://www.itu.int/sites/wwwfiles/tel_wireless.htm
  45. 45. A STUDY MODULE FROM NOKIA SIEMENS NETWORKS .</li></ul>REFERENCES<br />
  46. 46. THANK YOU<br />

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