for Microwave Access WiMAX I

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BAB 2 T

ý þÿ þ STA A

2.1 for Microwave Access WiMAX

y t u + t , -. 1 2, r s r - . 3 st . r 4 w 5 6 4 7 y . 0 1- , 8 2 . 0 - . , + IEEE 9: ;= ? . 1 3 A 1 2 1- , + B B B ? 6 IEEE 7 8 u 3 C . , + B T D D S -High Performance Metropolitan Area Network 6 ETSI HiperMAN 7 T , -. 1 WiMAX 1- , . s ,2 1 t , -. 1 IEEE 9: ; = E D 3 t 1 - t - . 2 +F WiMAX 8 , ru 3 - . . 8 y . 0 1 3 - 1 u . G u - s , 8 u 3H C - IEEE 9: ; = 6 G I. H , ws J ; :: K7 T + C . =L L 9 J IEEE 8 , 8 2, . G u - 0H u 3 IEEE 9: ;= y . 0 2, rtu M u . 8 , .0 , 8 2 . 0 - . st . r . G r N 8 u - u . G u - M r 1.0 . 31 t ,2 r .1 r - 2, t u Broadband Wireless Access 6 BWA 7 F - C A w ru 3 1.1 + 3 , . 0 , 8 2 . . s 1 st , 8 point-to-multipoint Line of Sight 6 LOS 7 3 1 t ,2 r . 1 r - 2, y . 0 2 , r 3 , r s 1 3 O r , - C, . A 1 = : P Q Hz 6 G I. H , ws R; :: K76 L Nu y 8 1 R; :: K7 WiMAX 8 , ru 3 - . , v us 1 r 1 t , -. 1 BWA s , 2, u 8 . y , . 0 . O 1 tur N O 1 tur y . 0 ,2 1 + S . 00 1 + T , -. 1 WiMAX s , S r u 8 u 8 3 t 10 u . - . u . G u - 8 , . C -C .0 - A , s 31 t , 2 r .1 r - 2 , 2 1 3 , . 00 . 2 , rs 1 O t t , t 3 6 fixed 7 8 u 3 C . 3 , . . 2 , rs 1 O t . 8 , . 6 nomadic 7 . 8 , 8 1 1-1 3 , r , r - . t 1 . 00 1 6 mobile 7 WiMAX 8 , 8 u . 0 - 1 .- . - A , s broadband wireless last mile s , 2 1 t , r . t 1 O 3 , .00 . G 1 31 t ,2 r - 2, . Digital Subscriber Line 6 DSL 7 G 8 2 r ;= 8 , . C . M u -- . 1 8 3 , 8 , . G s 1 t , -. 1 WiMAX s , S r u 8 u 8 6 G I . r , ws R ; :: K7 T UV W X V Y

2.1 I

Z [ \ ] Z ] _` s a T ] bc \ cd a W a MAX e G f A g h ] ws ijkklm T ]bc \ cd a n o p q r s u d ` Z ] y ] g a` b ` t ] r t` d `a b ] u _ u d ` t a\` g at`ga d b ` g] d ` t ]bc \ cd a u v w x y `ba b] Z ` Z [ y ` u _ u b Z ]s ` d b ` u g ` ] r ` z [] \ ` d d ` z add ` r `ga us { k Z a \ x t ]b] r s` [`g ` bcga s a | }~ -Line of Sight e NLOS g ] d ` b]  ][` t ` \` s u g` t ` z a dd ` Z ]  ` [ ` a lT € t [ s e t ] r d `_ u d s [ ] s a  ab ` s a y ` d gad u `b` m f K ] Z ` Z [ y ` aa Z ] Zt y ` t WiMAX Z ]s ` ga t ]bc \ cd a y ` d s ` d ` t t ] r b] Zt` d ga s ] \ uru z g u a ` e G f ‚ g h ] ws ijk k lmf 2.2 ƒ „ Y… „ W X V † ‡V † ˆ‰ Š A ‹ WiMAX t ] \ ` z Z ] \ `\ u a t ] t ] r ` [` t ` z ` [ ` [] d] Z t` d ` g` st ` g` r a s ` s a f St ` g ` r ` w `\ WiMAX y ` a tu Œ kjf Ž b] Z u ga` t ] r b] Zt` d Z ] s` g a st `g ` r Œ kjf Ž ` x Œ kj f Ž  jkk  x g ` Œ kjf Ž ]jkkT f j fjf  f St ` g ` r Œ kj f Ž D a[] r b] ` \ b` [ ` g` D ] s ] Zt ] r jkk  x t ] r g ` s ` r b ` \` [a s  a s a b e PHY m single- carrier g] d ` \` [a s Medium Access Control e MAC m Z ] dd u ` b ` burst time division multiplexing e TDM m f K c ‘ ] [ [ ` g` \ ` [ a s MAC t` y ` b ga ` gc[ ‘ a g ` r a st ` g ` r ’ t “ ”•–—–˜ ™ y š • ˜ › ™ ˜ u •š ”š• œš ›š – ›“  ž Ÿ Ÿ Over Cable Service Interface Specification DOCSIS. T “ ” •–— –˜ ™ ™•™ › ™˜ u • š” š• œš › š ”–• › ™ s ™ LOS u • ¡ u ” œ “ — š • ˜ ˜ š• y š • ˜ s ™ ¢ š t • y š t “ t šœ £ fixed ¤ ›š• ¥“” “ r ¦š œš › š ¢ r “ ” § “ •¨ ™ ©ª « ’ ’ GHz £ G ¬­ • › ® “ ws ¯ ° ªª ± ¤ . ° ¬ ° ¬ ° ¬ St š• › š r ² ª ° ¬ © ’ š D ™œ “ r ” “ •š — ” š• œš› š t š³ u • ° ªª´µ  “ ru œ š”š• š š• ›“  “ • ›š r ™ st š• ›š r ² ª ° ¬ © ’ › š • › ™ tu ¦ u ” š• u • ¡ u ” œ “ —š•˜ ˜ š• ¥ “ rs ™ ¢ š t t “ t šœ ¬ St š • › š r ™•™  “ • ›§ ” § •˜ ”– • › ™ s ™ NLOS › š • ¥“ ” “ r ¦š œ š› š ¢ r “ ” § “•¨ ™ ° « ©© GHz ›“ • ˜š •  “ •˜˜ u • š”š• orthogonal frequency division multiplexing £ OFDM ¤ œš ›š — š œ™ s ¢ ™ s ™ ” • y š £ G ¬­ •› ® “ ws ¯ ° ªª ± ¤ ¬ ° ¬ ° ¬ ´ ¬ St š• › š r ² ª ° ¬ © ’ « ° ªª ¶ P “ r ” “  ¥ š • ˜ š• ¥ “ r ™” § ¡ • y š  “ • ˜ ³š s ™ —”š• st š• ›š r ¥š ru œš ›š t š ³ § • ° ª ª ¶ ¬ St š • › š r ™•™  “ ™ —™ ”™ s “  u š st š• › š r y š• ˜ t “ r › šœ š t œš ›š ² ª ° ¬ © ’ › š • ² ª ° ¬ © ’ š › “ • ˜ š • ¥“ r ¥ š ˜š ™ t š ¥ š³š• œš ›š œ ® – ¡ –” –— —šœ™ s • y š ¬ S š— š ³ s š tu • y š ™ š — š ³ ” “ šœ § š • u • ¡ u ”  “ • ›§ ”§ •˜ œ “ • ˜˜ u •š š• orthogonal frequency division multiple access £ OFDMA ¤ ¬ St š• › š r ™ •™  “ •¦š › ™ ¥ š s ™ s ¥ š˜ ™ s ™ st “  WiMAX u • tu ” ¦š r ™•˜ š• œ™ t š — “¥š r t “ t šœ £ fixed broadband wireless ¤ µ s “ ³™ •˜ ˜š s “ r ™•˜ ›™ s “ ¥§ ¡ s “¥ š ˜ š™ fixed WiMAX £ G ¬­ • › ® “ ws ¯ ° ªª ± ¤ £ L ¬ · §š y  ™ ¯ ° ªª ± ¤ ¬ ° ¬ ° ¬ ¶ ¬ St š• › š r ² ª ° ¬ © ’ “ « ° ªª¸ P š › š ¥§ —š• D “ s “  ¥“ r ° ª ª¸ µ ˜ ru œ IEEE  “ • y “— “ s š™”š• › š •  “ • y “ tu ¦ u ™ st š • › š r IEEE ² ª ° ¬ © ’ “ « ° ªª ¸ y š• ˜  “ ru œ š”š• šš• ›“  “• t “ r ³š› šœ st š • › š r ² ª ° ¬ © ’ « ° ªª ¶ ¬ St š• › š r ™•™  “ •š ¥ š³” š• ›§ ” § • ˜ š • t “ r ³š›šœ – ¥ ™ —™ t š s › š •  “ • ¦ š › ™ ¥ š s ™ s ¥ š ˜ ™ s ™ st “  WiMAX u • ¡ u ”  “ — š y š •™ œ “ —š• ˜˜š • y š • ˜ ¥ “ rs ™ ¢ š t ¥“ r ˜ “ r š” £ mobile ¤ š u œ § • •–š ›“ • £ nomadic ¤µ s “³™•˜˜ š s “ r ™• ˜ › ™ s “¥ § ¡ s “¥ š ˜ š™ – ¥ ™ — “ WiMAX ¬ A › šœ § • œ “ r ¥ š•› ™ • ˜ š • ¨ t š• ›š r IEEE ² ª ° ¬ © ’ › šœš t › ™— ™³š t œš › š T š ¥ “ — ° ¬ © £ G ¬­ • › r “ ws ¯ ° ª ª ± ¤ ¬ ¹ T º» ¼½

2.1 P