wireless communication unit-2 Common cellular system ppt

1. UNIT-2
COMMON CELLULAR SYSTEM
COMPONENTS
ASHUTHA K., ECE Dept., Sahyadri College of Engineering and Management

2. Topics to be covered
1. Common cellular network components
2. Hardware and software views of cellular system
3. 3G cellular system components
4. Cellular component identification
5. Call establishment
ASHUTHA K., ECE Dept., Sahyadri College of Engineering and Management

3. 1. Common cellular network components
A. Subscriber Device (SD)
B. Base Station Subsystem (BSS)
C. Network Switching System (NSS)
ASHUTHA K., ECE Dept., Sahyadri College of Engineering and Management

4. Figure 2 : Wireless cellular system components
ASHUTHA K., ECE Dept., Sahyadri College of Engineering and Management

5. A. Subscriber Device (SD)
ASHUTHA K., ECE Dept., Sahyadri College of Engineering and Management

6. Mobile Station (MS)
The Mobile Station is made up of two entities:
1. Mobile Equipment (ME)
2. Subscriber Identity Module (SIM)
6ASHUTHA K., ECE Dept., Sahyadri College of Engineering and Management

7. Figure 1 : Subscriber device block diagram
ASHUTHA K., ECE Dept., Sahyadri College of Engineering and Management

8. B. Base Station Subsystem (BSS)
ASHUTHA K., ECE Dept., Sahyadri College of Engineering and Management

9. Figure 2 : Wireless cellular system components
ASHUTHA K., ECE Dept., Sahyadri College of Engineering and Management

10. B. Base Station Subsystem (BSS)
 Base Transceiver Station (BTS)
 Base Station Controller (BSC)
ASHUTHA K., ECE Dept., Sahyadri College of Engineering and Management

11. Signal
Quality
ASHUTHA K., ECE Dept., Sahyadri College of Engineering and Management

14. Base Transceiver Station (BTS)
• The BTS contains the RF components that provide the
air interface for a particular cell .
• Encodes, encrypts, multiplexes, modulates and feeds the
RF signals to the antenna.
• Communicates with Mobile station and BSC.
• Consists of Transceivers (TRX) units.
14ASHUTHA K., ECE Dept., Sahyadri College of Engineering and Management

15. Base Station Controller (BSC)
 Provides the control for the BSS.
 Communicates directly with the MSC.
 May control single or multiple BTS.
 In charge of handoff , allocation of Radio channel
to BTS and control of power level of BTS.
 During existing radio channel BSC maintains signal
quality & disconnects when call is over.
15ASHUTHA K., ECE Dept., Sahyadri College of Engineering and Management

16. ASHUTHA K., ECE Dept., Sahyadri College of Engineering and Management

17. Intel x86 embedded ISA board
ASHUTHA K., ECE Dept., Sahyadri College of Engineering and Management

18. TRANSCODER (TC)
• BSC communicates with transcoder with A-ter
interface
• Main function is used to convert 64kbps
original speech to 16kbps speech signal
• To ensure efficient modulation on air interface
ASHUTHA K., ECE Dept., Sahyadri College of Engineering and Management

19. Figure 2 : Wireless cellular system components
ASHUTHA K., ECE Dept., Sahyadri College of Engineering and Management

20. Network Switching Subsystem(NSS)
1. Mobile Switching Center (MSC)
2. Visitor Location Register (VLR)
3. Home Location Register (HLR)
4. Authentication Center (AUC)
5. Equipment Identity Register (EIR)
6. Operation and maintenance center (OMC)
20ASHUTHA K., ECE Dept., Sahyadri College of Engineering and Management

21. 1. Mobile Switching Center (MSC)
◦ Central component of NSS.
◦ MSC performs the switching functions.
◦ Each MSC provides service to MS located within a defined geographic
coverage area.
21ASHUTHA K., ECE Dept., Sahyadri College of Engineering and Management

22. Typical MSC system
ASHUTHA K., ECE Dept., Sahyadri College of Engineering and Management

23. HARDWARE VIEW OF CELULAR SYSTEM

24. SOFTWARE VIEW OF CELULAR SYSTEM

25. 3G CELLULAR SYSTEM COMPONENTS

26. ASHUTHA K., ECE Dept., Sahyadri College of Engineering and Management

27. CELLULAR COMPONENT IDENTIFICATION
I. Subscriber Device Identification (SD)
II. Cellular System Component Addressing
III. Global Title and Global Title Translation
1. MSISDN
2. IMSI
3. IMEI
ASHUTHA K., ECE Dept., Sahyadri College of Engineering and Management

28. Integrated Service Digital Network
ASHUTHA K., ECE Dept., Sahyadri College of Engineering and Management

29. ASHUTHA K., ECE Dept., Sahyadri College of Engineering and Management

30. ASHUTHA K., ECE Dept., Sahyadri College of Engineering and Management

31. ASHUTHA K., ECE Dept., Sahyadri College of Engineering and Management

32. ASHUTHA K., ECE Dept., Sahyadri College of Engineering and Management

33. MOBILE SUBSCRIBER ISDN NUMBER
ASHUTHA K., ECE Dept., Sahyadri College of Engineering and Management

34. CELLULAR COMPONENT IDENTIFICATION
I. Subscriber Device Identification (SD)
II. Cellular System Component Addressing
III. Global Title and Global Title Translation
1. MSISDN
2. IMEI
3. IMSI
ASHUTHA K., ECE Dept., Sahyadri College of Engineering and Management

35. INTERNATIONAL MOBILE EQUIPMENT
IDENTITY (IMEI)
ASHUTHA K., ECE Dept., Sahyadri College of Engineering and Management

36. ASHUTHA K., ECE Dept., Sahyadri College of Engineering and Management

37. International Mobile Equipment Identity (IMEI)
ASHUTHA K., ECE Dept., Sahyadri College of Engineering and Management

38. ASHUTHA K., ECE Dept., Sahyadri College of Engineering and Management

39. ASHUTHA K., ECE Dept., Sahyadri College of Engineering and Management

40. ASHUTHA K., ECE Dept., Sahyadri College of Engineering and Management

41. ASHUTHA K., ECE Dept., Sahyadri College of Engineering and Management

42. INTERNATIONAL MOBILE SUBSCRIBER
IDENTITY
ASHUTHA K., ECE Dept., Sahyadri College of Engineering and Management

43. CELLULAR COMPONENT IDENTIFICATION
I. Subscriber Device Identification (SD)
II. Cellular System Component Addressing
III. Global Title and Global Title Translation
1. MSISDN
2. IMEI
3. IMSI
ASHUTHA K., ECE Dept., Sahyadri College of Engineering and Management

44. ASHUTHA K., ECE Dept., Sahyadri College of Engineering and Management

45. ASHUTHA K., ECE Dept., Sahyadri College of Engineering and Management

46. ASHUTHA K., ECE Dept., Sahyadri College of Engineering and Management

47. ASHUTHA K., ECE Dept., Sahyadri College of Engineering and Management

48. ASHUTHA K., ECE Dept., Sahyadri College of Engineering and Management

49. ASHUTHA K., ECE Dept., Sahyadri College of Engineering and Management

50. ASHUTHA K., ECE Dept., Sahyadri College of Engineering and Management

51. Location Area Identity (LAI)
ASHUTHA K., ECE Dept., Sahyadri College of Engineering and Management

52. CELLULAR COMPONENT IDENTIFICATION
I. Subscriber Device Identification (SD)
II. Cellular System Component Addressing
III. Global Title and Global Title Translation
1. MSISDN
2. IMSI
3. IMEI
1. Location Area Identity
(LAI)
2. Global Identity (CGI)
3. Radio Base Station
Identity Code
4. Location Numbering
ASHUTHA K., ECE Dept., Sahyadri College of Engineering and Management

53. ASHUTHA K., ECE Dept., Sahyadri College of Engineering and Management

54. ASHUTHA K., ECE Dept., Sahyadri College of Engineering and Management

55. ASHUTHA K., ECE Dept., Sahyadri College of Engineering and Management

56. NETWORK COLOR CODE (NCC)- 3 Bit
BASE STATION COLOR CODE (BCC)- 3 Bit
ASHUTHA K., ECE Dept., Sahyadri College of Engineering and Management

57. CELLULAR COMPONENT IDENTIFICATION
I. Subscriber Device Identification (SD)
II. Cellular System Component Addressing
III. Global Title and Global Title Translation
1. MSISDN
2. IMSI
3. IMEI
1. Location Area Identity
(LAI)
2. Global Identity (CGI)
3. Radio Base Station
Identity Code
4. Location Numbering
ASHUTHA K., ECE Dept., Sahyadri College of Engineering and Management

58. 3. Global Title and Global Title Translation
MCC MNC MSIN
Translation
CC MSINNDC
MSINMNCMCC
MGT (E.214)
E.164 part E.212 part
ASHUTHA K., ECE Dept., Sahyadri College of Engineering and Management

59. CALL ESTABLISHMENT
MOBILE TERMINATED CALL
MOBILE ORIGINATED CALL
CALL RELASE
ASHUTHA K., ECE Dept., Sahyadri College of Engineering and Management

60. Mobile-terminated call
ASHUTHA K., ECE Dept., Sahyadri College of Engineering and Management

61. Mobile-Originated Call
ASHUTHA K., ECE Dept., Sahyadri College of Engineering and Management

62. Call Release
ASHUTHA K., ECE Dept., Sahyadri College of Engineering and Management