Chapter 5 3G Wireless Systems. Mrs.M.R.Kuveskar.

Transcription

1 Chapter 5 3G Wireless Systems Mrs.M.R.Kuveskar.

2 Upgrade paths for 2G Technologies 2G IS-95 GSM- IS-136 & PDC 2.5G IS-95B HSCSD GPRS EDGE Cdma2000-1xRTT W-CDMA 3G Cdma2000-1xEV,DV,DO EDGE Cdma2000-3xRTT 3GPP2 TD-SCDMA 3GPP 2

3 3G Standard 3G Standard is created by ITU and is called as IMT-2000.

4 IMT-2000 International Mobile telecommunication ( IMT-2000) is the global standard for Third generation (3G) wireless communications defined by set of interdependent ITU recommendations.( ITU- International Telecommunication Union).

5 IMT-2000 The aim of IMT-2000 is to harmonize worldwide 3G systems to provide Global Roaming.

6 IMT-2000 IMT-2000 is working towards bringing all the different technologies, all vendors, and all standard making bodies to a common programe.

7 Vision of IMT )Common initial spectrum worldwide( GHZ) 2)Multiple Radio Environment ( Cellular, Cordless, Satellite, LANs) 3)Wide Range of Telecommunications Services(Voice, Data, Multimedia, Internet)

8 Vision of IMT ) Global seamless Roaming and service delivery across IMT-2000 family networks. 5) Support of VHE( Virtual Home Environment) and UTP(Universal personal Telecommunications) 6) Integration of Satellite and terrestrial systems to provide Global Coverage.

9 Vision of IMT ) Flexible Radio bearers for increased spectrum efficiency. 9) Data rates upto 2Mbps (Phase-1) for indoor Environments. 10 ) Maximum use of intelligent Networks(IN) capabilities ( for service provision and transport)

10 Performance evolution of cellular technologies 10

11 3G wireless Systems Voice Quality comparable to that of the existing public telephone network. Data rates of 144 kbps for moving vehicles ( cars), 384 kbps for as user walks ( pedestrians ), and 2 Mbps for stationary user.

12 3G wireless Systems A band of 1.8 to 2 GHz. Bandwidth of 2 MHz. Interface to internet.

13 3G Advantages A person can download and watch movie, Can download and listen music. Can surf internet, down load and play games. Can conduct interactive web sessions Video conferencing.

14 3G Advantages Multi-Megabit internet access. Communication using Voice over IP(VOIP) Voice Activated Calls. Unparalled network capability. Always on Access to network.

15 W-CDMA/UMTS Wideband CDMA or Universal mobile Telecommunication service. UMTS is 3G Std. is visionary air interface std. developed by ETSI. ( European Telecommunication Standards Institute)

16 W-CDMA/UMTS W-CDMA interface designed for always- on access, so that computers,entertainment devices and telephone may all share same wireless network and may be connected to internet anytime, anywhere.

17 W-CDMA/UMTS It supports Packet data rate upto Mbps. Bandwidth is 5MHz. It allows high quality data, multimedia, streaming video, streaming audio, and broadcast type of services.

18 UMTS Frequency Spectrum UMTS Band : Uplink: MHz Downlink: MHz for 3G transmission

19 CDMA2000 evolution to 3G IS-95B Uses multiple code channels Data rates up to 64kbps Many operators gone direct to 1xRTT CDMA IS-95A IS-95A 14.4 kbps Core network re-used in CDMA2000 IS-95B 1xRTT CDMA2000 1xRTT: single carrier RTT First phase in CDMA2000 evolution Easy co-existence with IS-95A air interface Release 0 - max 144 kbps Release A max 384 kbps Same core network as IS-95 CDMA2000 1xEV-DO: Evolved Data Optimised Third phase in CDMA2000 evolution Standardised version of Qualcomm High Data Rate (HDR) Adds TDMA components beneath code components Good for highly asymmetric high speed data apps Speeds to 2Mbps +, classed as a 3G system Use new or existing spectrum 1xEV-DO 1xEV-DV CDMA2000 3xRTT CDMA2000 1x Evolved DV Fourth phase in CDMA2000 evolution Still under development Speeds to 5Mbps+ (more than 3xRTT!) Possible end game. 19

20 IS-95A CDMA was commercially introduced in 1995 with IS-95A or cdmaone. IS-95A is the CDMA-based second generation (2G) standard for mobile communication.

21 IS-95A The key aspects of this standard: Support for data rates of upto 14.4 kbps IS-95A has been used exclusively for circuit-switched voice. Convolutional Channel coding used Modulation technique used is BPSK

22 IS-95B IS-95B or cdmaone is the evolved version of IS-95A and is designated as 2.5G. Theoretical data rates of upto 115 kbps, with generally experienced rates of 64 kbps Binary Phase Shift Keying (BPSK) as the Modulation technique used.

23 CDMA X Supports theoretical data rates of upto 307 kbps, with generally experienced rates of 144 kbps. Code channels are transmitted at full data rates during a data burst Convolutional and Turbo coding techniques used Modulation technique used is QPSK

24 CDMA X It supports upto twice as many voice users as 2G CDMA. Provides the Subscriber unit with upto two times the standby time for longer battery life.

25 CDMA EV-DO Dedicates radio channel strictly to data users and supports data rate greater than 2.4 Mbps.

26 CDMA EV-DV Backward compatible with CDMA EV-DV can be easily extended to operate in 3x mode under the framework of current system. Forward peak data rate : Mbps. Reverse peak data rate: kbps.

27 CDMA X Offering data speeds up to 2 Mbps Using three standard 1.25 MHz channels within a 5 MHz band Using Convolutional and Turbo coding techniques. Using QPSK as the Modulation technique.

28 WLL and LMDS Remaining..

29 1xEV-DV Backward compatible with CDMA EV-DV can be easily extended to operate in 3x mode under the framework of current system. Forward peak data rate : Mbps. Reverse peak data rate: kbps. Addition of three new channels to f/w link and reverse link for packet data operation and its support. Adaptive modulation and coding : QPSK, 8- PSK, 16-QAM Variable frame duration Mobile station can select one of N base stations. DTX transmission supported for saving battery life. 29

30 IS-95A CDMA was commercially introduced in 1995 with IS-95A or cdmaone. IS-95A is the CDMA-based second generation (2G) standard for mobile communication. The following are the key aspects of this standard: Support for data rates of upto 14.4 kbps IS-95A has been used exclusively for circuit-switched voice Convolutional Channel coding used Modulation technique used is BPSK 30

31 IS-95B IS-95B or cdmaone is the evolved version of IS-95A and is designated as 2.5G. IS-95B maintains the Physical Layer of IS-95A, but due to an enhanced MAC layer, is capable of providing for higher speed data services. The following are the key aspects of the standard: Theoretical data rates of upto 115 kbps, with generally experienced rates of 64 kbps Additional Walsh codes and PN sequence masks, which enable a mobile user to be assigned up to eight forward or reverse code channels simultaneously, thus enabling a higher data rate Code channels, which are transmitted at full data rates during a data burst Convolutional Channel coding Binary Phase Shift Keying (BPSK) as the Modulation technique used 31

32 CDMA x CDMA EVDO CDMA EVDV Services roadmap Improved performance, decreasing cost of delivery Typical average bit rates (peak rates higher) A number of mobile services are bearer independent in nature Voice & SMS GSM 9.6 kbps 3G-specific services take advantage of higher bandwidth and/or real-time QoS MMS picture / video xhtml browsing Application downloading Presence/location Push-to-talk GPRS 171 kbps Multitasking WEB browsing Corporate data access Streaming audio/video EGPRS 473 kbps Video sharing Video telephony Real-time IP multimedia and games Multicasting WCDMA 2 Mbps Broadband in wide area HSDPA 1-10 Mbps 32

33 CDMA X Supports theoretical data rates of upto 307 kbps, with generally experienced rates of 144 kbps The newly introduced Q-PCH of CDMA 2000 enables the mobile to be informed about when it needs to monitor F-CCCH and the Paging Channel, thus improving on the battery life Introduction of Radio Configurations Transmission formats characterized by physical layer parameters such as data rates, modulation characteristics, and spreading rate. RCs help in providing for additional data rates. Quality and Erasure indicator bits (QIB and EIB) on the reverse power control sub channel. These help in indicating to the BS about bad frames or lost frames received at the mobile station, so that they can be retransmitted Code channels are transmitted at full data rates during a data burst Convolutional and Turbo coding techniques used Modulation technique used is QPSK 33

34 CDMA X Offering data speeds up to 2 Mbps Using three standard 1.25 MHz channels within a 5 MHz band Leveraging deployment experiences, and manufacturers learning curves of today s widely adopted, commercially available CDMA systems Using Convolutional and Turbo coding techniques Using QPSK as the Modulation technique 34

35 1X EV-DO Supporting data rates of up to 2.4 Mbps Having no backward-compatibility with CDMA 2000 Including two inter-operable modes: an integrated 1x mode optimized for voice and medium data speeds, and a 1xEV mode optimized for non real-time high capacity/high speed data and Internet access Providing Adaptive Rate Operation with respect to channel conditions Providing Adaptive modulation and coding Providing Macro diversity via radio selection Providing an always-on operation of 1xEV-DO terminals in the active state Using a multi-level modulation format (QPSK, 8-PSK, 16-QAM) 35

36 1xEV-DV Backward compatible with CDMA EV-DV can be easily extended to operate in 3x mode under the framework of current system. Forward peak data rate : Mbps. Reverse peak data rate: kbps. Addition of three new channels to f/w link and reverse link for packet data operation and its support. Adaptive modulation and coding : QPSK, 8- PSK, 16-QAM Variable frame duration Mobile station can select one of N base stations. DTX transmission supported for saving battery life. 36

37 IS-95B IS-95B or cdmaone is the evolved version of IS-95A and is designated as 2.5G. IS-95B maintains the Physical Layer of IS-95A, but due to an enhanced MAC layer, is capable of providing for higher speed data services. The following are the key aspects of the standard: Theoretical data rates of upto 115 kbps, with generally experienced rates of 64 kbps Additional Walsh codes and PN sequence masks, which enable a mobile user to be assigned up to eight forward or reverse code channels simultaneously, thus enabling a higher data rate Code channels, which are transmitted at full data rates during a data burst Convolutional Channel coding Binary Phase Shift Keying (BPSK) as the Modulation technique used 37

38 CDMA X Supports theoretical data rates of upto 307 kbps, with generally experienced rates of 144 kbps The newly introduced Q-PCH of CDMA 2000 enables the mobile to be informed about when it needs to monitor F-CCCH and the Paging Channel, thus improving on the battery life Introduction of Radio Configurations Transmission formats characterized by physical layer parameters such as data rates, modulation characteristics, and spreading rate. RCs help in providing for additional data rates. Quality and Erasure indicator bits (QIB and EIB) on the reverse power control sub channel. These help in indicating to the BS about bad frames or lost frames received at the mobile station, so that they can be retransmitted Code channels are transmitted at full data rates during a data burst Convolutional and Turbo coding techniques used Modulation technique used is QPSK 38

39 CDMA X Offering data speeds up to 2 Mbps Using three standard 1.25 MHz channels within a 5 MHz band Leveraging deployment experiences, and manufacturers learning curves of today s widely adopted, commercially available CDMA systems Using Convolutional and Turbo coding techniques Using QPSK as the Modulation technique 39

40 1X EV-DO Supporting data rates of up to 2.4 Mbps Having no backward-compatibility with CDMA 2000 Including two inter-operable modes: an integrated 1x mode optimized for voice and medium data speeds, and a 1xEV mode optimized for non real-time high capacity/high speed data and Internet access Providing Adaptive Rate Operation with respect to channel conditions Providing Adaptive modulation and coding Providing Macro diversity via radio selection Providing an always-on operation of 1xEV-DO terminals in the active state Using a multi-level modulation format (QPSK, 8-PSK, 16-QAM) 40

41 1xEV-DV Backward compatible with CDMA EV-DV can be easily extended to operate in 3x mode under the framework of current system. Forward peak data rate : Mbps. Reverse peak data rate: kbps. Addition of three new channels to f/w link and reverse link for packet data operation and its support. Adaptive modulation and coding : QPSK, 8- PSK, 16-QAM Variable frame duration Mobile station can select one of N base stations. DTX transmission supported for saving battery life. 41

42 UMTS UMTS Universal Mobile Telephone System Most popular 3G wireless standard. Combines the infrastructure of the GSM network with superior technology of the CDMA air interface. UMTS was originally a European standard. Widely adopted in Japan Approx. complete deployment by the end of 2006.

43 3G - UMTS Uses W-CDMA 5 MHz of bandwidth for each channel. Several thousand users can be supported on each cell site. Offers 11 Mbps download speeds in theory. Uplink speeds are much slower Meaning, that you wouldn t want your cell phone to be a web server. Speeds for moving devices are also slower. Most users are finding download throughput of about 384 Kbps. However, this is still much faster than the 14.4 Kbps optimally that GSM offered.

44 3G - Frequencies In Europe: Uses 1900 MHz band for uplink And 2100 MHz band for downloading Heavily contested bandwidth auctions. Limited acceptance. In Japan and South Korea: Bandwidth is for the public s good, so frequencies are open for cellular communications. Highly accepted. In North America: Bands are used by other things (AMPS, GSM, satellite communication in the 2100 MHz band. Must use existing frequency space. Very limited acceptance.

45 Evolution of 3G

46 GSM Based Systems/TDMA

47 IS-95 Compatible Std./CDMA

48 IMT-2000

49 Vision Of IMT-2000

50 UMTS

51 UMTS-Frequency Band

52 UMTS- Features

53 Architecture Of UMTS

54 Architecture Of UMTS

55 CDMA2000

56 CDMA 2000 Standards

57 CDMA X RTT

58 CDMA X EV

59 CDMA X EV-DO

60 CDMA X RTT

61 Wireless Local Loop

62 Local Muiltipoint Distribution System(LMDS )