1 CORSO DI LAUREA IN INGENERIA INFORMATICA

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(2) !" #%$&('*),+$-./*/%01324130265/7$ CORSO DI LAUREA IN INGENERIA INFORMATICA. 89;:=<?>@<@ACBED@FG9;BH I J KML NJ OQPSR T U V U3KWKWU XZY UW[NJ O\PSR T P ] ^3_ `Zacb db e*b _W_ b f g e hi^3^3^ jlknm\opWq. rtsvuCwyx{zv|{}~ ;y ?Cv;vy ;y GyCv;y;= ¡v¢¤£¦¥C£?¡y§{¨© ª«v¬¬ ¥ty®¡v¢;¯ «;° ¯¨ ±³²´²¶µ±¸··@±º¹%»v¼¾½{·µ ¿EÀÀ@¿ Á Â?ÃÃ¦Ä 1.

(3) A tutte le persone che mi sono state vicine. 2.

(4) Desidero ringraziare:. il prof. Luciano Lenzini e l’ing. Enzo Mingozzi perché solo grazie al loro aiuto sono riuscito a portare a termine questa tesi.. la mia ragazza, Laura, per la sua comprensione soprattutto in questa ultima fase dei miei studi.. la mia famiglia, mio padre e mia madre in particolare, per la loro fiducia ,senza la quale non sarei mai potuto arrivare a scrivere queste note di ringraziamento.. 3.

(5) Introduction ................................................................................... 6 1. IEEE Standard 802.16.......................................................... 7 1.1 Overview........................................................................................................... 7 1.2 History of IEEE 802.16 .................................................................................... 9 1.3 Technology Design: Medium Access Control.................................................. 9 1.3.1 Medium Access Control.............................................................................. 9 1.3.2 Service specific convergence sublayers..................................................... 12 1.3.3 Introduction and general Architecture...................................................... 12 1.3.4 MAC PDU Formats.................................................................................. 13 1.3.5 Transmission of MAC PDUs..................................................................... 14 1.3.6 PHY Support and Frame Structure ........................................................... 14 1.3.7 Radio Link Control................................................................................... 15 1.3.8 Uplink scheduling service......................................................................... 17 1.3.8.1 Unsolicited Grant Service ..................................................................... 17 1.3.8.2 Real-Time Polling Service .................................................................... 18 1.3.8.3 Non-Real-Time Polling Service ............................................................ 18 1.3.8.4 Best Effort service ................................................................................ 18 1.3.8.5 Bandwidth Allocation and Grants ......................................................... 19 1.3.8.6 IP Connectivity..................................................................................... 20 1.3.8.7 Connection Setup ................................................................................. 20 1.4 Technology Design: Physical Layer............................................................... 21 1.4.1 10-66 GHz................................................................................................ 21 1.4.2 2-11 GHz.................................................................................................. 22 1.4.3 Physical Layer Details.............................................................................. 23. 2.. Introduction on 2^K Analysis............................................ 26. 2.1 Introduction.................................................................................................... 26 2.2 Type of Experimental Analysis...................................................................... 26 2.3 Analysis 2^k ................................................................................................... 28 2.3.1 Method of Signs Table to Calculate the Effects ......................................... 30 2.3.2 Allocation of the Variation ....................................................................... 30. 3.. Traffic sources .................................................................... 33. 3.1 Internet Data Sources .................................................................................... 33 3.2 Voice ............................................................................................................... 35 3.2.1 CBR model (T1/E1) .................................................................................. 35 3.2.2 VoIP model............................................................................................... 35 3.3 Video conference ............................................................................................ 36 3.4 Real Traffic Traces ........................................................................................ 37 3.5 Uplink Scheduling Services............................................................................ 37 3.5.1 T1/E1 ....................................................................................................... 37 3.5.2 VoIP......................................................................................................... 37 3.5.3 Video Conference ..................................................................................... 37 3.5.4 Video Streaming ....................................................................................... 37 3.5.5 WWW ....................................................................................................... 37 3.5.6 FTP .......................................................................................................... 37 3.5.7 SMTP ....................................................................................................... 37 3.5.8 TELNET ................................................................................................... 37 3.5.9 Network Gaming ...................................................................................... 37. 4.. Performance Evaluation .................................................... 38. 4.1 Full-Duplex SSs .............................................................................................. 39 4.1.1 rtPS and Best Effort Services.................................................................... 39 4.

(6) 4.1.1.1 Conclusions on Full-Duplex SSs with BE service and for different frame durations 49 4.1.2 rtPS and nrtPS Services............................................................................ 50 4.1.2.1 Conclusions on Full-Duplex SSs with nrtPS service and for different frame durations .................................................................................................... 59 4.2 Half-Duplex SSs ............................................................................................. 60 4.2.1 rtPS and Best Effort Services.................................................................... 60 4.2.1.1 Conclusions on Half-Duplex SSs with BE service and for different frame durations 70 4.2.2 rtPS and nrtPS Services............................................................................ 71 4.2.2.1 Conclusions on Half-Duplex SSs with nrtPS service and for different frame durations .................................................................................................... 80 4.2.3 Conclusions.............................................................................................. 80 4.3 Time Out Retransmit Sensitivity Analysis .................................................... 81 4.3.1 Results...................................................................................................... 81 4.3.2 Conclusion on HD SSs and FDSSs scenarios........................................... 82 4.4 Varying Time Out transmit ........................................................................... 83 4.4.1 description of the scenario........................................................................ 83 4.4.2 conclusion on HD SSs and FD SSs scenarios............................................ 84 1.1 Varying Minimum Traffic Rate .................................................................... 87 4.5 ............................................................................................................................... 87 4.5.1 description of the scenario........................................................................ 87 4.5.2 Conclusion on HD SSs and FD SSs scenario ............................................ 92. 5.. 2^K Analysis on IEEE 802.16............................................ 93. 5.1 Preliminary Analysis on 2^k study................................................................ 93 5.1.1 Time Out Retransmit: Impact on 2^k study ............................................... 93 5.1.2 Time Out Transmit: Impact on 2^k study .................................................. 93 5.1.3 Minimum Traffic Rate: Impact on 2^k study.............................................. 93 5.1.4 Aggregate Throughput: Impact on 2^k study............................................. 93 5.1 2^K Analysis .................................................................................................. 95 5.2 ............................................................................................................................... 95 5.2.1 Introduction.............................................................................................. 95 5.2.2 Determination of an Objective.................................................................. 96 5.2.2 Analysis.................................................................................................... 98 5.2.3 ........................................................................................................................ 98 5.2.3.1 Analysis of the downlink function ...................................................... 102 5.2.3.2 Analysis of the Uplink function .......................................................... 105. 6. Conclusions ....................................................................... 109 Bibliography .............................................................................. 110 Glossary...................................................................................... 111 App.1 Performance measures................................................... 115 App.2 Description of the mechanism for improve the analysis .................................................................................................... 117 App 3 Figures used for the analysis.......................................... 121. 5.

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