Fundamentals of CDMA2000 1X Dr. Shahzada Alamgir Khan.

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Presentation transcript:

Fundamentals of CDMA2000 1X Dr. Shahzada Alamgir Khan

Objectives After completion of this course participants will be able to Understand the structure of CDMA X State the signal process flow of CDMA X State the technology of CDMA X Describe the interfaces of CDMA X Describe the numbers in CDMA X

Contents CDMA Network Structure Development of Mobile Communications Technology Roadmap Transmission Techniques Development of CDMA System

CDMA X Network Structure 2G/3G Terminals Abis PSTN/PLMN BSC/ PCF (1X) Internet Router IP BTS （ IS-95 ） BSC （ IS-95 ） Abis E1 Um IS95 Um IS2000 E1 STM-1 E1 STM-1 Ethernet MSC/VLRHLR/AUC PDSN/FA AAA HA OMC SC WIN BTS （ IS-95 ） BSC/ PCF (1X) BTS （ 1X ） E1 Server Ethernet

PDSN also named as FA Foreign Agent Lower circle is known as PS domain Upper circle is named as CS domain For EVDO no CS domain is required

Page 6 1 st Generation 1980s (analog) 2 nd Generation 1990s (digital) 3 rd Generation current (digital) 3G provides: Complete integrated service solutions High bandwidth Unified air interface Best spectral efficiency and ……………… a step towards PCS AMPS Analog to Digital TACS NMT OTHERS GSM CDMA IS95 TDMA IS-136 PDC UMTS WCDMA CDMA 2000 TD- SCDMA Development of Mobile Communications Voice to Broadband

GSM/UMTS Ecosystem CDMA 2000 Ecosystem * Theoretical. Standards in progress Technology Roadmap Future proofing our technology roadmap LTE* 50 Mbps+ HSPA 7 – 30 Mbps EVDO Rev A 3.2Mbps 7

Page 8 Transmission Techniques Traffic channels: different users are assigned unique code and transmitted over the same frequency band, for example, WCDMA and CDMA2000 Traffic channels: different frequency bands are allocated to different users,for example, AMPS and TACS Traffic channels: different time slots are allocated to different users, for example, DAMPS and GSM Frequency Time Power Frequency Time Power Frequency Time Power FDMA TDMA CDMA User

Page 9 IS95A 9.6kbps IS95B 115.2kbps CDMA kbps  Heavier voice service capacity ;  Longer period of standby time CDMA2000 3X CDMA2000 1X EV 1X EV-DO 1X EV-DV Development of CDMA System Higher spectrum efficiency and network capacity Higher packet data rate and more diversified services Smooth transit to 3G

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