Wcdma for umts radio access for third genergation mobile communacations phần 8 potx

... HSDPA techniques for the uplink direction is under investigation in 3GPP for inclusion in forthcoming Releases, though the expected gain is not foreseen to 344 WCDMA for UMTS 11 .8. 3 User Scheduling, ... DSCH: 326 WCDMA for UMTS rate for the connection. For example, with Adaptive Multirate (AMR) speech service and packet data, the DCH capacity reserved is equal to the sum...

Ngày tải lên: 14/08/2014, 12:21

... (approx.) 256 15 7.5 kbps 1 28 30 15 kbps 64 60 30 kbps 32 120 60 kbps 16 240 120 kbps 8 480 240 kbps 4 960 480 kbps 4, with 6 parallel codes 5740 2 .8 Mbps 116 WCDMA for UMTS As a performance improvement ... kbps 1 28 30 60 42–51 20–24 kbps 64 60 120 90 45 kbps 32 120 240 210 105 kbps 16 240 480 432 215 kbps 8 480 960 912 456 kbps 4 960 1920 187 2 936 kbps 4, with 3 parallel cod...

Ngày tải lên: 14/08/2014, 12:21

... 4.4 dB 3.0 dB 3.4 dB 356 WCDMA for UMTS The choice of multiuser detection techniques for WCDMA base station receivers has been studied [55– 58] . Both the receiver performance and imple mentation ... in −24 −22 −20 − 18 −16 −14 −12 −10 8 I c / l or [dB] −10 −50 510152025 G = I or / N 0 (dB) 3 km/h 50 km/h 120 km/h Figure 12.16. Effect of mobile speed in the ITU Pedestrian A...

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... UM, 156 radio network controller, RNC, 78 Drift RNC, 79 Serving RNC, 80 radio network sub-system, RNS, 78 radio resource control protocol, RRC, 164 Rake receiver, 52 RANAP, 85 random access channel, ... and Prasad, R., Wideband CDMA for Third Generation Mobile Communications, Artech House, 19 98, 439. [10] Holma, H., ‘A Study of UMTS Terrestrial Radio Access Performan...

Ngày tải lên: 14/08/2014, 12:21

... from a few kB UMTS Services and Applications 25 ETSI decided between the technologies in January 19 98 [8] , selecting WCDMA as the standard for the UTRA (UMTS Terrestrial Radio Access) air interface ... of the WCDMA waveform against interference is clearly compromised. The performance of high bit rates with WCDMA is presented in Section 12.4. Both base stations as well as mobi...

Ngày tải lên: 14/08/2014, 12:21

... procedures for initialisation and rate control are defined, and a functionality is specified for indicating the quality of the frame based, for example, on CRC from the radio interface. 86 WCDMA for UMTS very ... Mobile Radio Commu- nications, PIMRC’97, Helsinki, Finland, 1–4 September 1997, pp. 42–46. [5] Universal Mobile Telecommunications System (UMTS) , Requirements fo...

Ngày tải lên: 14/08/2014, 12:21

... Figure 8. 9. Effect of base station output power to downlink capacity and coverage 200 WCDMA for UMTS The link budget in Table 8. 3 is calculated for 12.2 kbps speech for in-car users, including 8. 0 ... handover gain [dB], multicell 3.0 s In-car loss [dB] 8. 0 t Allowed propagation loss for cell range [dB] 141.9 u ¼ q À r þ s À t 188 WCDMA for UMTS Figure 8. 5. This...

Ngày tải lên: 14/08/2014, 12:21

... 97.7 % 64 kbps 84 .6 % 88 .9 % 384 kbps 66.9 % 71.4 % Test mobile speed: Basic loading: mobile —————————————— speed 50 km/h 3 km/h 50 km/h 8 kbps 95.5 % 97.1 % 64 kbps 82 .4 % 87 .2 % 384 kbps 63.0 ... 63.0 % 67.2 % Test mobile speed: Basic loading: mobile 3 —————————————— and 50 km/h 3 km/h 50 km/h 8 kbps 96.0 % 97.5 % 64 kbps 83 .9 % 88 .3 % 384 kbps 65.7 % 70.2 % 214...

Ngày tải lên: 14/08/2014, 12:21

... in Figure 10. 28. 384 Target load level 384 384 256 384 256 256 256 256 1 28 Time 1 = 1 capacity request in the queue, 384 kbps allocated 1 2 3 4 5 2 = 2 nd capacity request arrives, room for 2nd 384 kbps 3 = ... % reduction 0 5 10 15 20 25 30 35 40 GPRS 3+2 EDGE 2+1 WCDMA 1 28 kbps WCDMA 384 kbps Seconds Yahoo 85 kB Nokia 190 kB 68 s Figure 10. 48. Measured web page downlo...

Ngày tải lên: 14/08/2014, 12:21