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Normal Bursth3 bits (zeros) TBs at the beginning and the end of the packet: To ramp on and off the radiated power and initiate the convolutional decoding of the data Equivalent to 8.25 bits f GP Two sets of 58 bits (encrypted), includes two flags bits at the end of each part of the data 26 bits training sequence, is used to train the adaptive equalizer at the receiver N@ Z[ Z Z@[,d @ABw. `The 456-bit packets are formed from the speech signal Each 20 ms of the coded speech at 13 kbps forms a 260-bit packet The first 50 most significant bits receives a 3-bit CRC code protection first, and then they are added to the second group of 132 bits with lower importance and a 4-bit tail that is all zeros The resulting 132 + 53 + 4 = 189 bits are then encoded with a convolutional encoder that doubles number of bits to 378 The convolutional code provides for error correction capabilities The 378 coded bits are added to the 78 least important speech-coded bits to form a 456 bits packet every 20 msa Pa~5x/ Three classes of speech coded bits The first class of 50 bits receives both CRC error detection and the rate convolutional error correcting coding protection The second 132 bits receive only the convolutional encoding protection The last 78 bits receives no protection Therefore, the speech coder can protect the more important bits representing larger values of voltages by assigning them into different categories Zy0 The formation of the 456 bit packets for 9,600 bps data The 192 bits of information are accompanied by 48 bits of signaling information and 4 tail bits to form a 244 bits packet that is then expanded to 456 bits using a rate punctured convolutional encoder Punctured coding can eliminate the need for doubling the number of transmitted bits by eliminating (puncturing) a certain number of bits The resulting 456 bits are turned to NBs similar to the speech packets Z6z1 Signaling channels using the NB as the channel over-the-air-interface use 184 signaling bits to convey the signaling message These bits are first block coded with 40 additional parity check bits and 4 tail bits to form a 228-bits block The 228-bits block is then coded with a rate convolutional encoder to form a 456 bits packet occupying a 20 ms slot that is turned to a burst for transmission P79P  0` 33PP` 3333` ___MMM` 13` 333fpKNāvI` j@v۩ῑ΂H` Q_{>?" dd@,?n<d@ `7 `2@`7``2 n?" dd@   @@``PR    @ ` ` p>>   H " (  H  H <L" H A  H ThAd" H A  H <lE"U_ H A  H THd">& H A  H N>"P H A  H <tk"p H A  H C xk?d?"bUv H A   H 6k "U k X Click to edit Master title style!! 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ZA ?? ^ B   ZA  ??d  ZA ??MWpH  0޽h ? 33z33___PPT10i.jR+D=' = @B +$  0 $(  r  S ,k H U  k r  S Zk H   k H  0޽h ? 33z3380___PPT10.zҺ 0 X(    6\ U .Frequency Correction Burst  08   03 bits (zeros) TBs at the beginning and the end of the packet The rest of the packet contains all zeros to allow simple transmission of the carrier frequency without any modulated info Equivalent to 8.25 bits f GP The BS broadcast the FB and MTs use it to synchronize with the master clock n the system 1 Z1,;  ZA ??H  0޽h ? 33z33___PPT10i.}I+D=' = @B + 0 z(    6D U )Synchronization Burst!  0x   W3 bits (zeros) TBs at the beginning and the end of the packet The 2*39 bits coded data is used are used for the specific task of identifying the network Equivalent to 8.25 bits f GP The BS broadcast the SB and MTs use it initial training of the equalizer as well as in initial learning f the network identity and to synchronize time slots. X ZX,  ZA ??H  0޽h ? 33z33___PPT10i.}I+D=' = @B +F 0 ]U(    6  U 'Random Access Burst  0   6Long start-up and synchronization sequence is used to initiate the equalizer Long GP to allow rough calculation of the distance of the MT from the BTS The RAB is used by MTs to access the BS as it registers to the network  Z2  ZA ??tH  0޽h ? 33z33___PPT10i.}I+D=' = @B +  0  (     f ?? U TPackets of Voice Traffic * r  S  H )I  H  0޽h ? 33z33___PPT10i.p+D=' = @B +D 0 D(    ZA ?? <  ZA ??$H  0޽h ? 33z3380___PPT10.GBr  0  0(     f6 ?? U TPackets of Voice Traffic * x  c $8 H 1Q7  H  0޽h ? 33z33___PPT10i.p+D=' = @B +  0  @(     fK ??~ U SPackets of Data Traffic * x  c $gk H 1Q7 k H  0޽h ? 33z33___PPT10i.p+D=' = @B +D 0 D(    ZA ??} 3  ZA  ??H  0޽h ? 33z3380___PPT10.>  0 P(     fY ??0U XPackets of Signaling Channel * x  c $ta H 1Q7  H  0޽h ? 33z33___PPT10i.p+D=' = @B +D 0 D(    ZA  ??/   ZA  ??Te,H  0޽h ? 33z3380___PPT10.;D 0  D(    ZA  ??  ZA ??O'H  0޽h ? 33z3380___PPT10.Rc]Qyx}|SGل`mɅqvo˦,`PR! 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Normal Bursth3 bits (zeros) TBs at the beginning and the end of the packet: To ramp on and off the radiated power and initiate the convolutional decoding of the data Equivalent to 8.25 bits f GP Two sets of 58 bits (encrypted), includes two flags bits at the end of each part of the data 26 bits training sequence, is used to train the adaptive equalizer at the receiver N@ Z[ Z Z@[,d @ABw.`The 456-bit packets are formed from the speech signal Each 20 ms of the coded speech at 13 kbps forms a 260-bit packet The first 50 most significant bits receives a 3-bit CRC code protection first, and then they are added to the second group of 132 bits with lower importance and a 4-bit tail that is all zeros The resulting 132 + 53 + 4 = 189 bits are then encoded with a convolutional encoder that doubles number of bits to 378 The convolutional code provides for error correction capabilities The 378 coded bits are added to the 78 least important speech-coded bits to form a 456 bits packet every 20 msa Pa~5x/Three classes of speech coded bits The first class of 50 bits receives both CRC error detection and the rate convolutional error correcting coding protection The second 132 bits receive only the convolutional encoding protection The last 78 bits receives no protection Therefore, the speech coder can protect the more important bits representing larger values of voltages by assigning them into different categories Zy0The formation of the 456 bit packets for 9,600 bps data The 192 bits of information are accompanied by 48 bits of signaling information and 4 tail bits to form a 244 bits packet that is then expanded to 456 bits using a rate punctured convolutional encoder Punctured coding can eliminate the need for doubling the number of transmitted bits by eliminating (puncturing) a certain number of bits The resulting 456 bits are turned to NBs similar to the speech packets Z6z1Signaling channels using the NB as the channel over-the-air-interface use 184 signaling bits to convey the signaling message These bits are first block coded with 40 additional parity check bits and 4 tail bits to form a 228-bits block The 228-bits block is then coded with a rate convolutional encoder to form a 456 bits packet occupying a 20 ms slot that is turned to a burst for transmission P79P  0  `(    Z0BI ??7 c'Global System for Mobile Communications (*( x  c $EI H I I H  0޽h ? 33z33___PPT10i.p+D=' V= @B +r~{2~1M(  x y;0$Photo Editor Photo MSPhotoEd.30@Microsoft Photo Editor 3.0 Photok8www.ccse.kfupm.edu.sa/~tarekFhttp://www.ccse.kfupm.edu.sa/~tarekn/ 0Q[dpp~hhhdpx~xh]Yntnrp]dlvjQMb|vdjpzxzztljr||_[r~~jb_j|z|xpp~~v]Wh||zx|x|zzndhpxr]Yfntzjl|z||~vppnrzphrxz|~|xtrjjtv~~vz|z||xrrv~xrprtz|||vzxvx|xtx~~~~~~~zxxxx|zxz~~~rrz~|xz~~|vtx|zxz|~~~||zx|||~~zz|zz~~~~|~~||~~||zz|~||z~~~~zxzz|~~~~|~~~|~||~~~~~~~~~~ArialBlends!Microsoft Photo Editor 3.0 PhotoMobile Computing COE 446 GSMSlide 2Slide 3Slide 4Slide 5Slide 6Slide 7 Normal BurstSlide 9 Slide 10 Slide 11 Slide 12 Slide 13 Slide 14 Slide 15 Slide 16 Slide 17 Slide 18 Slide 19  Fonts UsedDesign TemplateEmbedded OLE Servers Slide Titlesgo ? o {   _PID_HLINKS TemplateType GraphicType Compression ScreenSize ScreenUsage MailAddress HomePage Other DownloadOriginal DownloadIEButton UseBrowserColor BackColor TextColor LinkColor VisitedColorTransparentButton ButtonType ShowNotes NavBtnPos OutputDirA$http://www.ccse.kfupm.edu.sa/~tarekdskeshav@cs.cornell.edu(http://www.cs.cornell.edu/home/skeshav f3 F:\wwwlink\book\slides\atm   ,L#%)! I@)*jGg"2&pZ :GKY&~fE  >A   N1,   0     >       0       b$!D6.7Yx,<Gb$DR1 `Gb$rS_Cgy1B!Wb$. 5,JFyb$W'=nb$YdC(dM 8^b$C1|*+0Bqb$?!J)Zrb$`PsfA1b$/oA"yD-(Ob$(2W V]~P m>b$R?4l: Xv [xNb$/PCO,<.Mb$=J,QZ9L6d3b$IO8 $x$G$$$b$yaQaFOb$UW& Rb$^Jƈih.b$9M/N9ЎVt<b$t!M-Q܁ߴ`Jb$z 4H쀆WKV|Wb$&Jb:8&nb$9b Tޢ::jdX ~b$'sǚQ~o5^x 0e0e A@A5%8c8c     ?1d0u0@Ty2 NP'p<'p@A)BCD|E? ff3f@mg4KdKd`WE 0p| p@  <4dd l 0T<4dd l 0Tg47d7dYE 0p p j:ʚ;dt8ʚ;<4dddd l 0 ___PPT10e ZZ." tarek....62___PPT9/ 0?Z 4/12/2004 ,Communication NetworksO =!-Mobile Computing COE 446 GSM* $;Tarek Sheltami KFUPM CCSE COE www.ccse.kfupm.edu.sa/~tarek <P<k 0:<=>|3{2GSM bands: 850 MHz, 900 MHz, 1800 MHz and 1900 MHz Dual-band 850/900 MHz Tri-Band 900/1800/1900 MHz Quad-band 850/900/1800/1900 MHz 25 MHz for each direction divided into 124 channels of 200 kHz with 100 kHz band at the two edges Each carrier supports 8 time slots for TDMA operation Data rate carrier is 270.833 kbps Duration of each bit is 3.69 s The user transmission packet burst is fixed at 557 s Burst size * bit duration (156.25 bits*3.69s)   P{ P P1 P {b  6b,bT]4.8? Normal Bursth3 bits (zeros) TBs at the beginning and the end of the packet: To ramp on and off the radiated power and initiate the convolutional decoding of the data Equivalent to 8.25 bits f GP Two sets of 58 bits (encrypted), includes two flags bits at the end of each part of the data 26 bits training sequence, is used to train the adaptive equalizer at the receiver N@ Z[ Z Z@[,d @ABw.`The 456-bit packets are formed from the speech signal Each 20 ms of the coded speech at 13 kbps forms a 260-bit packet The first 50 most significant bits receives a 3-bit CRC code protection first, and then they are added to the second group of 132 bits with lower importance and a 4-bit tail that is all zeros The resulting 132 + 53 + 4 = 189 bits are then encoded with a convolutional encoder that doubles number of bits to 378 The convolutional code provides for error correction capabilities The 378 coded bits are added to the 78 least important speech-coded bits to form a 456 bits packet every 20 msa Pa~5x/Three classes of speech coded bits The first class of 50 bits receives both CRC error detection and the rate convolutional error correcting coding protection The second 132 bits receive only the convolutional encoding protection The last 78 bits receives no protection Therefore, the speech coder can protect the more important bits representing larger values of voltages by assigning them into different categories Zy0The formation of the 456 bit packets for 9,600 bps data The 192 bits of information are accompanied by 48 bits of signaling information and 4 tail bits to form a 244 bits packet that is then expanded to 456 bits using a rate punctured convolutional encoder Punctured coding can eliminate the need for doubling the number of transmitted bits by eliminating (puncturing) a certain number of bits The resulting 456 bits are turned to NBs similar to the speech packets Z6z1Signaling channels using the NB as the channel over-the-air-interface use 184 signaling bits to convey the signaling message These bits are first block coded with 40 additional parity check bits and 4 tail bits to form a 228-bits block The 228-bits block is then coded with a rate convolutional encoder to form a 456 bits packet occupying a 20 ms slot that is turned to a burst for transmission P79Pr12 61N(  x {;0$Photo Editor Photo MSPhotoEd.30@Microsoft Photo Editor 3.0 Photok8www.ccse.kfupm.edu.sa/~tarekFhttp://www.ccse.kfupm.edu.sa/~tarekn/ 0|DTimes New RomanTT Z ܖ 0ܖDTimes New Roman (Hebrew) 0ܖ DTahomaew Roman (Hebrew) 0ܖ"0DWingdingsRoman (Hebrew) 0ܖ@DArialngsRoman (Hebrew) 0ܖ" A.@  @@``  @n?" dd@  @@``_@,whoosh.wav.WAV 10103RIFFWAVEfmt ++data~~~~~~~~~~~~~~~~~~~~~~~~~~~|||~~~~~zvtvxz|~zvrnlrv||vtrpptz~|xvtv|~~zxvvvz|~xrlhntzzvrrpprrx~|j[QU_|bICCYn[ICY~zlnh]_r|]SUSSjz|x__l~v_]drnUb|nfd_]d]5=rrnj]jz~lMldrx[[_f|YQfWK_xh[zx[CIjzxxdSQz|_fI9WӹM;QnvK;OUx~xj]]YS~ɵlM?plM;CGpٵ[)Kh|% %;xtKQS]ɖbGr|lSnvz~nfS[nëx;Az=+AYݻ|=/1r_ ?|潄W5/Czãf)/pvbMQr|O=OtjdhjlG?G_ɊK3לdQCMppW;1SŷAMz/#?bx͖SAM[hvhYp~~zrvt[]ptWOUtxxd]v~vvxzd_xzh_nrSQltbdp~_lrQ_l][tf]W]~hWfp|fWhnhbU[hzlSCWbYbnxpdhjvjM9Ot]GQ[dpp~hhhdpx~xh]Yntnrp]dlvjQMb|vdjpzxzztljr||_[r~~jb_j|z|xpp~~v]Wh||zx|x|zzndhpxr]Yfntzjl|z||~vppnrzphrxz|~|xtrjjtv~~vz|z||xrrv~xrprtz|||vzxvx|xtx~~~~~~~zxxxx|zxz~~~rrz~|xz~~|vtx|zxz|~~~||zx|||~~zz|zz~~~~|~~||~~||zz|~||z~~~~zxzz|~~~~|~~~|~||~~~~~~~~~~~~~|||~~~~~~~~~~~~~||~~||~||~~~~|||~~~~||||~~~~~~||||~~~~~~~~~~~|~~~~|zz~~~~~~~||||~~||~~~~~|||~~~~~|||~|~|~~~~|z|~~~~~~~|||~~~~~~~~||~~~~~~~~ ++#x'! $   ,L#%)! 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Normal Burstj3 bits (zeros) TBs at the beginning and the end of the packet: To ramp on and off the radiated power and initiate the convolutional decoding of the data Equivalent to 8.25 bits for GP Two sets of 58 bits (encrypted), includes two flags bits at the end of each part of the data 26 bits training sequence, is used to train the adaptive equalizer at the receiver N@ Z[ Z Z@[>d /@ABw.`The 456-bit packets are formed from the speech signal Each 20 ms of the coded speech at 13 kbps forms a 260-bit packet The first 50 most significant bits receives a 3-bit CRC code protection first, and then they are added to the second group of 132 bits with lower importance and a 4-bit tail that is all zeros The resulting 132 + 53 + 4 = 189 bits are then encoded with a convolutional encoder that doubles number of bits to 378 The convolutional code provides for error correction capabilities The 378 coded bits are added to the 78 least important speech-coded bits to form a 456 bits packet every 20 msa Pa~5x/Three classes of speech coded bits The first class of 50 bits receives both CRC error detection and the rate convolutional error correcting coding protection The second 132 bits receive only the convolutional encoding protection The last 78 bits receives no protection Therefore, the speech coder can protect the more important bits representing larger values of voltages by assigning them into different categories Zy0The formation of the 456 bit packets for 9,600 bps data The 192 bits of information are accompanied by 48 bits of signaling information and 4 tail bits to form a 244 bits packet that is then expanded to 456 bits using a rate punctured convolutional encoder Punctured coding can eliminate the need for doubling the number of transmitted bits by eliminating (puncturing) a certain number of bits The resulting 456 bits are turned to NBs similar to the speech packets Z6z1Signaling channels using the NB as the channel over-the-air-interface use 184 signaling bits to convey the signaling message These bits are first block coded with 40 additional parity check bits and 4 tail bits to form a 228-bits block The 228-bits block is then coded with a rate convolutional encoder to form a 456 bits packet occupying a 20 ms slot that is turned to a burst for transmission P79P$  0 $(  r  S  T H U   r  S T H    H  0޽h ? 33z3380___PPT10.zҺrjyl?Fn1M(  x {;0$Photo Editor Photo MSPhotoEd.30@Microsoft Photo Editor 3.0 Photok8www.ccse.kfupm.edu.sa/~tarekFhttp://www.ccse.kfupm.edu.sa/~tarekn/ 0|DTimes New RomanTT Z ܖ 0ܖDTimes New Roman (Hebrew) 0ܖ DTahomaew Roman (Hebrew) 0ܖ"0DWingdingsRoman (Hebrew) 0ܖ@DArialngsRoman (Hebrew) 0ܖ" A.@  @@``  @n?" dd@  @@``_@,whoosh.wav.WAV 10103RIFFWAVEfmt ++data~~~~~~~~~~~~~~~~~~~~~~~~~~~|||~~~~~zvtvxz|~zvrnlrv||vtrpptz~|xvtv|~~zxvvvz|~xrlhntzzvrrpprrx~|j[QU_|bICCYn[ICY~zlnh]_r|]SUSSjz|x__l~v_]drnUb|nfd_]d]5=rrnj]jz~lMldrx[[_f|YQfWK_xh[zx[CIjzxxdSQz|_fI9WӹM;QnvK;OUx~xj]]YS~ɵlM?plM;CGpٵ[)Kh|% %;xtKQS]ɖbGr|lSnvz~nfS[nëx;Az=+AYݻ|=/1r_ ?|潄W5/Czãf)/pvbMQr|O=OtjdhjlG?G_ɊK3לdQCMppW;1SŷAMz/#?bx͖SAM[hvhYp~~zrvt[]ptWOUtxxd]v~vvxzd_xzh_nrSQltbdp~_lrQ_l][tf]W]~hWfp|fWhnhbU[hzlSCWbYbnxpdhjvjM9Ot]GQ[dpp~hhhdpx~xh]Yntnrp]dlvjQMb|vdjpzxzztljr||_[r~~jb_j|z|xpp~~v]Wh||zx|x|zzndhpxr]Yfntzjl|z||~vppnrzphrxz|~|xtrjjtv~~vz|z||xrrv~xrprtz|||vzxvx|xtx~~~~~~~zxxxx|zxz~~~rrz~|xz~~|vtx|zxz|~~~||zx|||~~zz|zz~~~~|~~||~~||zz|~||z~~~~zxzz|~~~~|~~~|~||~~~~~~~~~~~~~|||~~~~~~~~~~~~~||~~||~||~~~~|||~~~~||||~~~~~~||||~~~~~~~~~~~|~~~~|zz~~~~~~~||||~~||~~~~~|||~~~~~|||~|~|~~~~|z|~~~~~~~|||~~~~~~~~||~~~~~~~~ ++#x'! $   ,L#%)! I@)*jGg"2&pZ :GKY&~fE  >A   N1,   0     >       0       b$!D6.7Yx,<Gb$DR1 `Gb$rS_Cgy1B!Wb$. 5,JFyb$W'=nb$YdC(dM 8^b$C1|*+0Bqb$?!J)Zrb$`PsfA1b$/oA"yD-(Ob$(2W V]~P m>b$R?4l: Xv [xNb$/PCO,<.Mb$=J,QZ9L6d3b$IO8 $x$G$$$b$yaQaFOb$UW& Rb$^Jƈih.b$9M/N9ЎVt<b$t!M-Q܁ߴ`Jb$z 4H쀆WKV|Wb$&Jb:8&nb$9b Tޢ::jdX ~b$'sǚQ~o5^x 0e0e A@A5%8c8c     ?1d0u0@Ty2 NP'p<'p@A)BCD|E? ff3f@mg4KdKdZ  0p| p@  <4dd l 0T<4dd l 0Tg47d7dZ  0p p j:ʚ;dt8ʚ;<4dddd l 0 ___PPT10e ZZ." tarek....62___PPT9/ 0?Z 4/12/2004 ,Communication NetworksO =!-Mobile Computing COE 446 GSM* $;Tarek Sheltami KFUPM CCSE COE www.ccse.kfupm.edu.sa/~tarek <P<k 0:<=>|3{2GSM bands: 850 MHz, 900 MHz, 1800 MHz and 1900 MHz Dual-band 850/900 MHz Tri-Band 900/1800/1900 MHz Quad-band 850/900/1800/1900 MHz 25 MHz for each direction divided into 124 channels of 200 kHz with 100 kHz band at the two edges Each carrier supports 8 time slots for TDMA operation Data rate carrier is 270.833 kbps Duration of each bit is 3.69 s The user transmission packet burst is fixed at 557 s Burst size * bit duration (156.25 bits*3.69s)   P{ P P1 P {b  6b,bJ]5.8? Normal Burstj3 bits (zeros) TBs at the beginning and the end of the packet: To ramp on and off the radiated power and initiate the convolutional decoding of the data Equivalent to 8.25 bits for GP Two sets of 58 bits (encrypted), includes two flags bits at the end of each part of the data 26 bits training sequence, is used to train the adaptive equalizer at the receiver N@ Z[ Z Z@[,d @ABw.`The 456-bit packets are formed from the speech signal Each 20 ms of the coded speech at 13 kbps forms a 260-bit packet The first 50 most significant bits receives a 3-bit CRC code protection first, and then they are added to the second group of 132 bits with lower importance and a 4-bit tail that is all zeros The resulting 132 + 53 + 4 = 189 bits are then encoded with a convolutional encoder that doubles number of bits to 378 The convolutional code provides for error correction capabilities The 378 coded bits are added to the 78 least important speech-coded bits to form a 456 bits packet every 20 msa Pa~5x/Three classes of speech coded bits The first class of 50 bits receives both CRC error detection and the rate convolutional error correcting coding protection The second 132 bits receive only the convolutional encoding protection The last 78 bits receives no protection Therefore, the speech coder can protect the more important bits representing larger values of voltages by assigning them into different categories Zy0The formation of the 456 bit packets for 9,600 bps data The 192 bits of information are accompanied by 48 bits of signaling information and 4 tail bits to form a 244 bits packet that is then expanded to 456 bits using a rate punctured convolutional encoder Punctured coding can eliminate the need for doubling the number of transmitted bits by eliminating (puncturing) a certain number of bits The resulting 456 bits are turned to NBs similar to the speech packets Z6z1Signaling channels using the NB as the channel over-the-air-interface use 184 signaling bits to convey the signaling message These bits are first block coded with 40 additional parity check bits and 4 tail bits to form a 228-bits block The 228-bits block is then coded with a rate convolutional encoder to form a 456 bits packet occupying a 20 ms slot that is turned to a burst for transmission P79P 0 m(    6 U .Frequency Correction Burst  0<   33 bits (zeros) TBs at the beginning and the end of the packet The rest of the packet contains all zeros to allow simple transmission of the carrier frequency without any modulated info Equivalent to 8.25 bits for GP The BS broadcast the FB and MTs use it to synchronize with the master clock in the system 4 Z4>-   ZA ??H  0޽h ? 33z33___PPT10i.}I+D=' = @B +rn޼@n1M(  x {;0$Photo Editor Photo MSPhotoEd.30@Microsoft Photo Editor 3.0 Photok8www.ccse.kfupm.edu.sa/~tarekFhttp://www.ccse.kfupm.edu.sa/~tarekn/ 0|DTimes New RomanTT Z ܖ 0ܖDTimes New Roman (Hebrew) 0ܖ DTahomaew Roman (Hebrew) 0ܖ"0DWingdingsRoman (Hebrew) 0ܖ@DArialngsRoman (Hebrew) 0ܖ" A.@  @@``  @n?" dd@  @@``_@,whoosh.wav.WAV 10103RIFFWAVEfmt ++data~~~~~~~~~~~~~~~~~~~~~~~~~~~|||~~~~~zvtvxz|~zvrnlrv||vtrpptz~|xvtv|~~zxvvvz|~xrlhntzzvrrpprrx~|j[QU_|bICCYn[ICY~zlnh]_r|]SUSSjz|x__l~v_]drnUb|nfd_]d]5=rrnj]jz~lMldrx[[_f|YQfWK_xh[zx[CIjzxxdSQz|_fI9WӹM;QnvK;OUx~xj]]YS~ɵlM?plM;CGpٵ[)Kh|% %;xtKQS]ɖbGr|lSnvz~nfS[nëx;Az=+AYݻ|=/1r_ ?|潄W5/Czãf)/pvbMQr|O=OtjdhjlG?G_ɊK3לdQCMppW;1SŷAMz/#?bx͖SAM[hvhYp~~zrvt[]ptWOUtxxd]v~vvxzd_xzh_nrSQltbdp~_lrQ_l][tf]W]~hWfp|fWhnhbU[hzlSCWbYbnxpdhjvjM9Ot]GQ[dpp~hhhdpx~xh]Yntnrp]dlvjQMb|vdjpzxzztljr||_[r~~jb_j|z|xpp~~v]Wh||zx|x|zzndhpxr]Yfntzjl|z||~vppnrzphrxz|~|xtrjjtv~~vz|z||xrrv~xrprtz|||vzxvx|xtx~~~~~~~zxxxx|zxz~~~rrz~|xz~~|vtx|zxz|~~~||zx|||~~zz|zz~~~~|~~||~~||zz|~||z~~~~zxzz|~~~~|~~~|~||~~~~~~~~~~~~~|||~~~~~~~~~~~~~||~~||~||~~~~|||~~~~||||~~~~~~||||~~~~~~~~~~~|~~~~|zz~~~~~~~||||~~||~~~~~|||~~~~~|||~|~|~~~~|z|~~~~~~~|||~~~~~~~~||~~~~~~~~ ++#x'~~~|||~~~~~~~~~~~~~||~~||~||~~~~|||~~~~||||~~~~~~||||~~~~~~~~~~~|~~~~|zz~~~~~~~||||~~||~~~~~|||~~~~~|||~|~|~~~~|z|~~~~~~~|||~~~~~~~~||~~~~~~~~ ++#x'! $   ,L#%)! I@)*jGg"2&pZ :GKY&~fE  >A   N1,   0     >       0       b$!D6.7Yx,<Gb$DR1 `Gb$rS_Cgy1B!Wb$. 5,JFyb$W'=nb$YdC(dM 8^b$C1|*+0Bqb$?!J)Zrb$`PsfA1b$/oA"yD-(Ob$(2W V]~P m>b$R?4l: Xv [xNb$/PCO,<.Mb$=J,QZ9L6d3b$IO8 $x$G$$$b$yaQaFOb$UW& Rb$^Jƈih.b$9M/N9ЎVt<b$t!M-Q܁ߴ`Jb$z 4H쀆WKV|Wb$&Jb:8&nb$9b Tޢ::jdX ~b$'sǚQ~o5^x 0e0e A@A5%8c8c     ?1d0u0@Ty2 NP'p<'p@A)BCD|E? ff3f@mg4KdKdZ  0p| p@  <4dd l 0T<4dd l 0Tg47d7dZ  0p p j:ʚ;dt8ʚ;<4dddd l 0 ___PPT10e ZZ." tarek....62___PPT9/ 0?Z 4/12/2004 ,Communication NetworksO =!-Mobile Computing COE 446 GSM* $;Tarek Sheltami KFUPM CCSE COE www.ccse.kfupm.edu.sa/~tarek <P<k 0:<=>|3{2GSM bands: 850 MHz, 900 MHz, 1800 MHz and 1900 MHz Dual-band 850/900 MHz Tri-Band 900/1800/1900 MHz Quad-band 850/900/1800/1900 MHz 25 MHz for each direction divided into 124 channels of 200 kHz with 100 kHz band at the two edges Each carrier supports 8 time slots for TDMA operation Data rate carrier is 270.833 kbps Duration of each bit is 3.69 s The user transmission packet burst is fixed at 557 s Burst size * bit duration (156.25 bits*3.69s)   P{ P P1 P {b  6b,bJ]5.8? Normal Burstj3 bits (zeros) TBs at the beginning and the end of the packet: To ramp on and off the radiated power and initiate the convolutional decoding of the data Equivalent to 8.25 bits for GP Two sets of 58 bits (encrypted), includes two flags bits at the end of each part of the data 26 bits training sequence, is used to train the adaptive equalizer at the receiver N@ Z[ Z Z@[,d @ABw.`The 456-bit packets are formed from the speech signal Each 20 ms of the coded speech at 13 kbps forms a 260-bit packet The first 50 most significant bits receives a 3-bit CRC code protection first, and then they are added to the second group of 132 bits with lower importance and a 4-bit tail that is all zeros The resulting 132 + 53 + 4 = 189 bits are then encoded with a convolutional encoder that doubles number of bits to 378 The convolutional code provides for error correction capabilities The 378 coded bits are added to the 78 least important speech-coded bits to form a 456 bits packet every 20 msa Pa~5x/Three classes of speech coded bits The first class of 50 bits receives both CRC error detection and the rate convolutional error correcting coding protection The second 132 bits receive only the convolutional encoding protection The last 78 bits receives no protection Therefore, the speech coder can protect the more important bits representing larger values of voltages by assigning them into different categories Zy0The formation of the 456 bit packets for 9,600 bps data The 192 bits of information are accompanied by 48 bits of signaling information and 4 tail bits to form a 244 bits packet that is then expanded to 456 bits using a rate punctured convolutional encoder Punctured coding can eliminate the need for doubling the number of transmitted bits by eliminating (puncturing) a certain number of bits The resulting 456 bits are turned to NBs similar to the speech packets Z6z1Signaling channels using the NB as the channel over-the-air-interface use 184 signaling bits to convey the signaling message These bits are first block coded with 40 additional parity check bits and 4 tail bits to form a 228-bits block The 228-bits block is then coded with a rate convolutional encoder to form a 456 bits packet occupying a 20 ms slot that is turned to a burst for transmission P79P 0 (    6U U )Synchronization Burst-  0P   Q3 bits (zeros) TBs at the beginning and the end of the packet The 2*39 bits coded data are used for the specific task of identifying the network Equivalent to 8.25 bits for GP The BS broadcast the SB and MTs use it initial training of the equalizer as well as in initial learning f the network identity and to synchronize time slots. R ZR>   ZA ??H  0޽h ? 33z33___PPT10i.}I+D=' /= @B +rA1M(  x {;0$Photo Editor Photo MSPhotoEd.30@Microsoft Photo Editor 3.0 Photok8www.ccse.kfupm.edu.sa/~tarekFhttp://www.ccse.kfupm.edu.sa/~tarekn/ 0|DTimes New RomanTT Z ܖ 0ܖDTimes New Roman (Hebrew) 0ܖ DTahomaew Roman (Hebrew) 0ܖ"0DWingdingsRoman (Hebrew) 0ܖ@DArialngsRoman (Hebrew) 0ܖ" A.@  @@``  @n?" dd@  @@``_@,whoosh.wav.WAV 10103RIFFWAVEfmt ++data~~~~~~~~~~~~~~~~~~~~~~~~~~~|||~~~~~zvtvxz|~zvrnlrv||vtrpptz~|xvtv|~~zxvvvz|~xrlhntzzvrrpprrx~|j[QU_|bICCYn[ICY~zlnh]_r|]SUSSjz|x__l~v_]drnUb|nfd_]d]5=rrnj]jz~lMldrx[[_f|YQfWK_xh[zx[CIjzxxdSQz|_fI9WӹM;QnvK;OUx~xj]]YS~ɵlM?plM;CGpٵ[)Kh|% %;xtKQS]ɖbGr|lSnvz~nfS[nëx;Az=+AYݻ|=/1r_ ?|潄W5/Czãf)/pvbMQr|O=OtjdhjlG?G_ɊK3לdQCMppW;1SŷAMz/#?bx͖SAM[hvhYp~~zrvt[]ptWOUtxxd]v~vvxzd_xzh_nrSQltbdp~_lrQ_l][tf]W]~hWfp|fWhnhbU[hzlSCWbYbnxpdhjvjM9Ot]GQ[dpp~hhhdpx~xh]Yntnrp]dlvjQMb|vdjpzxzztljr||_[r~~jb_j|z|xpp~~v]Wh||zx|x|zzndhpxr]Yfntzjl|z||~vppnrzphrxz|~|xtrjjtv~~vz|z||xrrv~xrprtz|||vzxvx|xtx~~~~~~~zxxxx|zxz~~~rrz~|xz~~|vtx|zxz|~~~||zx|||~~zz|zz~~~~|~~||~~||zz|~||z~~~~zxzz|~~~~|~~~|~||~~~~~~~~~~~~~|||~~~~~~~~~~~~~||~~||~||~~~~|||~~~~||||~~~~~~||||~~~~~~~~~~~|~~~~|zz~~~~~~~||||~~||~~~~~|||~~~~~|||~|~|~~~~|z|~~~~~~~|||~~~~~~~~||~~~~~~~~ ++#x'! $   ,L#%)! I@)*jGg"2&pZ :GKY&~fE  >A   N1,   0     >       0       b$!D6.7Yx,<Gb$DR1 `Gb$rS_Cgy1B!Wb$. 5,JFyb$W'=nb$YdC(dM 8^b$C1|*+0Bqb$?!J)Zrb$`PsfA1b$/oA"yD-(Ob$(2W V]~P m>b$R?4l: Xv [xNb$/PCO,<.Mb$=J,QZ9L6d3b$IO8 $x$G$$$b$yaQaFOb$UW& Rb$^Jƈih.b$9M/N9ЎVt<b$t!M-Q܁ߴ`Jb$z 4H쀆WKV|Wb$&Jb:8&nb$9b Tޢ::jdX ~b$'sǚQ~o5^x 0e0e A@A5%8c8c     ?1d0u0@Ty2 NP'p<'p@A)BCD|E? ff3f@mg4KdKdZ  0p| p@  <4dd l 0T<4dd l 0Tg47d7dZ  0p p j:ʚ;dt8ʚ;<4dddd l 0 ___PPT10e ZZ." tarek....62___PPT9/ 0?Z 4/12/2004 ,Communication NetworksO =!-Mobile Computing COE 446 GSM* $;Tarek Sheltami KFUPM CCSE COE www.ccse.kfupm.edu.sa/~tarek <P<k 0:<=>|3{2GSM bands: 850 MHz, 900 MHz, 1800 MHz and 1900 MHz Dual-band 850/900 MHz Tri-Band 900/1800/1900 MHz Quad-band 850/900/1800/1900 MHz 25 MHz for each direction divided into 124 channels of 200 kHz with 100 kHz band at the two edges Each carrier supports 8 time slots for TDMA operation Data rate carrier is 270.833 kbps Duration of each bit is 3.69 s The user transmission packet burst is fixed at 557 s Burst size * bit duration (156.25 bits*3.69s)   P{ P P1 P {b  6b,bJ]5.8? Normal Burstj3 bits (zeros) TBs at the beginning and the end of the packet: To ramp on and off the radiated power and initiate the convolutional decoding of the data Equivalent to 8.25 bits for GP Two sets of 58 bits (encrypted), includes two flags bits at the end of each part of the data 26 bits training sequence, is used to train the adaptive equalizer at the receiver N@ Z[ Z Z@[,d @ABw.`The 456-bit packets are formed from the speech signal Each 20 ms of the coded speech at 13 kbps forms a 260-bit packet The first 50 most significant bits receives a 3-bit CRC code protection first, and then they are added to the second group of 132 bits with lower importance and a 4-bit tail that is all zeros The resulting 132 + 53 + 4 = 189 bits are then encoded with a convolutional encoder that doubles number of bits to 378 The convolutional code provides for error correction capabilities The 378 coded bits are added to the 78 least important speech-coded bits to form a 456 bits packet every 20 msa Pa~5x/Three classes of speech coded bits The first class of 50 bits receives both CRC error detection and the rate convolutional error correcting coding protection The second 132 bits receive only the convolutional encoding protection The last 78 bits receives no protection Therefore, the speech coder can protect the more important bits representing larger values of voltages by assigning them into different categories Zy0The formation of the 456 bit packets for 9,600 bps data The 192 bits of information are accompanied by 48 bits of signaling information and 4 tail bits to form a 244 bits packet that is then expanded to 456 bits using a rate punctured convolutional encoder Punctured coding can eliminate the need for doubling the number of transmitted bits by eliminating (puncturing) a certain number of bits The resulting 456 bits are turned to NBs similar to the speech packets Z6z1Signaling channels using the NB as the channel over-the-air-interface use 184 signaling bits to convey the signaling message These bits are first block coded with 40 additional parity check bits and 4 tail bits to form a 228-bits block The 228-bits block is then coded with a rate convolutional encoder to form a 456 bits packet occupying a 20 ms slot that is turned to a burst for transmission P79P 0 y(    6U U )Synchronization Burst   0P   V3 bits (zeros) TBs at the beginning and the end of the packet The 2*39 bits coded data are used for the specific task of identifying the network Equivalent to 8.25 bits for GP The BS broadcast the SB and MTs use it to initially training of the equalizer as well as in initial learning f the network identity and to synchronize time slots. W ZW,  ZA ??H  0޽h ? 33z33___PPT10i.}I+D=' /= @B +rcAg1M(  x {;0$Photo Editor Photo MSPhotoEd.30@Microsoft Photo Editor 3.0 Photok8www.ccse.kfupm.edu.sa/~tarekFhttp://www.ccse.kfupm.edu.sa/~tarekn/ 0|DTimes New RomanTT Z ܖ 0ܖDTimes New Roman (Hebrew) 0ܖ DTahomaew Roman (Hebrew) 0ܖ"0DWingdingsRoman (Hebrew) 0ܖ@DArialngsRoman (Hebrew) 0ܖ" A.@  @@``  @n?" dd@  @@``_@,whoosh.wav.WAV 10103RIFFWAVEfmt ++data~~~~~~~~~~~~~~~~~~~~~~~~~~~|||~~~~~zvtvxz|~zvrnlrv||vtrpptz~|xvtv|~~zxvvvz|~xrlhntzzvrrpprrx~|j[QU_|bICCYn[ICY~zlnh]_r|]SUSSjz|x__l~v_]drnUb|nfd_]d]5=rrnj]jz~lMldrx[[_f|YQfWK_xh[zx[CIjzxxdSQz|_fI9WӹM;QnvK;OUx~xj]]YS~ɵlM?plM;CGpٵ[)Kh|% %;xtKQS]ɖbGr|lSnvz~nfS[nëx;Az=+AYݻ|=/1r_ ?|潄W5/Czãf)/pvbMQr|O=OtjdhjlG?G_ɊK3לdQCMppW;1SŷAMz/#?bx͖SAM[hvhYp~~zrvt[]ptWOUtxxd]v~vvxzd_xzh_nrSQltbdp~_lrQ_l][tf]W]~hWfp|fWhnhbU[hzlSCWbYbnxpdhjvjM9Ot]GQ[dpp~hhhdpx~xh]Yntnrp]dlvjQMb|vdjpzxzztljr||_[r~~jb_j|z|xpp~~v]Wh||zx|x|zzndhpxr]Yfntzjl|z||~vppnrzphrxz|~|xtrjjtv~~vz|z||xrrv~xrprtz|||vzxvx|xtx~~~~~~~zxxxx|zxz~~~rrz~|xz~~|vtx|zxz|~~~||zx|||~~zz|zz~~~~|~~||~~||zz|~||z~~~~zxzz|~~~~|~~~|~||~~~~~~~~~~~~~|||~~~~~~~~~~~~~||~~||~||~~~~|||~~~~||||~~~~~~||||~~~~~~~~~~~|~~~~|zz~~~~~~~||||~~||~~~~~|||~~~~~|||~|~|~~~~|z|~~~~~~~|||~~~~~~~~||~~~~~~~~ ++#x'! $   ,L#%)! I@)*jGg"2&pZ :GKY&~fE  >A   N1,   0     >       0       b$!D6.7Yx,<Gb$DR1 `Gb$rS_Cgy1B!Wb$. 5,JFyb$W'=nb$YdC(dM 8^b$C1|*+0Bqb$?!J)Zrb$`PsfA1b$/oA"yD-(Ob$(2W V]~P m>b$R?4l: Xv [xNb$/PCO,<.Mb$=J,QZ9L6d3b$IO8 $x$G$$$b$yaQaFOb$UW& Rb$^Jƈih.b$9M/N9ЎVt<b$t!M-Q܁ߴ`Jb$z 4H쀆WKV|Wb$&Jb:8&nb$9b Tޢ::jdX ~b$'sǚQ~o5^x 0e0e A@A5%8c8c     ?1d0u0@Ty2 NP'p<'p@A)BCD|E? ff3f@mg4KdKdZ  0p| p@  <4dd l 0T<4dd l 0Tg47d7dZ  0p p j:ʚ;dt8ʚ;<4dddd l 0 ___PPT10e ZZ." tarek....62___PPT9/ 0?Z 4/12/2004 ,Communication NetworksO =!-Mobile Computing COE 446 GSM* $;Tarek Sheltami KFUPM CCSE COE www.ccse.kfupm.edu.sa/~tarek <P<k 0:<=>|3{2GSM bands: 850 MHz, 900 MHz, 1800 MHz and 1900 MHz Dual-band 850/900 MHz Tri-Band 900/1800/1900 MHz Quad-band 850/900/1800/1900 MHz 25 MHz for each direction divided into 124 channels of 200 kHz with 100 kHz band at the two edges Each carrier supports 8 time slots for TDMA operation Data rate carrier is 270.833 kbps Duration of each bit is 3.69 s The user transmission packet burst is fixed at 557 s Burst size * bit duration (156.25 bits*3.69s)   P{ P P1 P {b  6b,bJ]5.8? Normal Burstj3 bits (zeros) TBs at the beginning and the end of the packet: To ramp on and off the radiated power and initiate the convolutional decoding of the data Equivalent to 8.25 bits for GP Two sets of 58 bits (encrypted), includes two flags bits at the end of each part of the data 26 bits training sequence, is used to train the adaptive equalizer at the receiver N@ Z[ Z Z@[,d @ABw.`The 456-bit packets are formed from the speech signal Each 20 ms of the coded speech at 13 kbps forms a 260-bit packet The first 50 most significant bits receives a 3-bit CRC code protection first, and then they are added to the second group of 132 bits with lower importance and a 4-bit tail that is all zeros The resulting 132 + 53 + 4 = 189 bits are then encoded with a convolutional encoder that doubles number of bits to 378 The convolutional code provides for error correction capabilities The 378 coded bits are added to the 78 least important speech-coded bits to form a 456 bits packet every 20 msa Pa~5x/Three classes of speech coded bits The first class of 50 bits receives both CRC error detection and the rate convolutional error correcting coding protection The second 132 bits receive only the convolutional encoding protection The last 78 bits receives no protection Therefore, the speech coder can protect the more important bits representing larger values of voltages by assigning them into different categories Zy0The formation of the 456 bit packets for 9,600 bps data The 192 bits of information are accompanied by 48 bits of signaling information and 4 tail bits to form a 244 bits packet that is then expanded to 456 bits using a rate punctured convolutional encoder Punctured coding can eliminate the need for doubling the number of transmitted bits by eliminating (puncturing) a certain number of bits The resulting 456 bits are turned to NBs similar to the speech packets Z6z1Signaling channels using the NB as the channel over-the-air-interface use 184 signaling bits to convey the signaling message These bits are first block coded with 40 additional parity check bits and 4 tail bits to form a 228-bits block The 228-bits block is then coded with a rate convolutional encoder to form a 456 bits packet occupying a 20 ms slot that is turned to a burst for transmission P79P 0 w(    6U U )Synchronization Burst  0P   T3 bits (zeros) TBs at the beginning and the end of the packet The 2*39 bits coded data are used for the specific task of identifying the network Equivalent to 8.25 bits for GP The BS broadcast the SB and MTs use it for initial training of the equalizer as well as in initial learning f the network identity and to synchronize time slots. U ZU,  ZA ??H  0޽h ? 33z33___PPT10i.}I+D=' 6= @B +rh/g1M(  x {;0$Photo Editor Photo MSPhotoEd.30@Microsoft Photo Editor 3.0 Photok8www.ccse.kfupm.edu.sa/~tarekFhttp://www.ccse.kfupm.edu.sa/~tarekn/ 0|DTimes New RomanTT Z ܖ 0ܖDTimes New Roman (Hebrew) 0ܖ DTahomaew Roman (Hebrew) 0ܖ"0DWingdingsRoman (Hebrew) 0ܖ@DArialngsRoman (Hebrew) 0ܖ" A.@  @@``  @n?" dd@  @@``_@,whoosh.wav.WAV 10103RIFFWAVEfmt ++data~~~~~~~~~~~~~~~~~~~~~~~~~~~|||~~~~~zvtvxz|~zvrnlrv||vtrpptz~|xvtv|~~zxvvvz|~xrlhntzzvrrpprrx~|j[QU_|bICCYn[ICY~zlnh]_r|]SUSSjz|x__l~v_]drnUb|nfd_]d]5=rrnj]jz~lMldrx[[_f|YQfWK_xh[zx[CIjzxxdSQz|_fI9WӹM;QnvK;OUx~xj]]YS~ɵlM?plM;CGpٵ[)Kh|% %;xtKQS]ɖbGr|lSnvz~nfS[nëx;Az=+AYݻ|=/1r_ ?|潄W5/Czãf)/pvbMQr|O=OtjdhjlG?G_ɊK3לdQCMppW;1SŷAMz/#?bx͖SAM[hvhYp~~zrvt[]ptWOUtxxd]v~vvxzd_xzh_nrSQltbdp~_lrQ_l][tf]W]~hWfp|fWhnhbU[hzlSCWbYbnxpdhjvjM9Ot]GQ[dpp~hhhdpx~xh]Yntnrp]dlvjQMb|vdjpzxzztljr||_[r~~jb_j|z|xpp~~v]Wh||zx|x|zzndhpxr]Yfntzjl|z||~vppnrzphrxz|~|xtrjjtv~~vz|z||xrrv~xrprtz|||vzxvx|xtx~~~~~~~zxxxx|zxz~~~rrz~|xz~~|vtx|zxz|~~~||zx|||~~zz|zz~~~~|~~||~~||zz|~||z~~~~zxzz|~~~~|~~~|~||~~~~~~~~~~~~~|||~~~~~~~~~~~~~||~~||~||~~~~|||~~~~||||~~~~~~||||~~~~~~~~~~~|~~~~|zz~~~~~~~||||~~||~~~~~|||~~~~~|||~|~|~~~~|z|~~~~~~~|||~~~~~~~~||~~~~~~~~ ++#x'! $   ,L#%)! 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I@)*jGg"2&pZ :GKY&~fE  >A   N1,   0     >       0       b$!D6.7Yx,<Gb$DR1 `Gb$rS_Cgy1B!Wb$. 5,JFyb$W'=nb$YdC(dM 8^b$C1|*+0Bqb$?!J)Zrb$`PsfA1b$/oA"yD-(Ob$(2W V]~P m>b$R?4l: Xv [xNb$/PCO,<.Mb$=J,QZ9L6d3b$IO8 $x$G$$$b$yaQaFOb$UW& Rb$^Jƈih.b$9M/N9ЎVt<b$t!M-Q܁ߴ`Jb$z 4H쀆WKV|Wb$&Jb:8&nb$9b Tޢ::jdX ~b$'sǚQ~o5^x 0e0e A@A5%8c8c     ?1d0u0@Ty2 NP'p<'p@A)BCD|E? ff3f@mg4KdKdZ  0p| p@  <4dd l 0T<4dd l 0Tg47d7dZ  0p p j:ʚ;dt8ʚ;<4dddd l 0 ___PPT10e ZZ." tarek....62___PPT9/ 0?Z 4/12/2004 ,Communication NetworksO =!-Mobile Computing COE 446 GSM* $;Tarek Sheltami KFUPM CCSE COE www.ccse.kfupm.edu.sa/~tarek <P<k 0:<=>|3{2GSM bands: 850 MHz, 900 MHz, 1800 MHz and 1900 MHz Dual-band 850/900 MHz Tri-Band 900/1800/1900 MHz Quad-band 850/900/1800/1900 MHz 25 MHz for each direction divided into 124 channels of 200 kHz with 100 kHz band at the two edges Each carrier supports 8 time slots for TDMA operation Data rate carrier is 270.833 kbps Duration of each bit is 3.69 s The user transmission packet burst is fixed at 557 s Burst size * bit duration (156.25 bits*3.69s)   P{ P P1 P {b  6b,bJ]5.8? Normal Burstj3 bits (zeros) TBs at the beginning and the end of the packet: To ramp on and off the radiated power and initiate the convolutional decoding of the data Equivalent to 8.25 bits for GP Two sets of 58 bits (encrypted), includes two flags bits at the end of each part of the data 26 bits training sequence, is used to train the adaptive equalizer at the receiver N@ Z[ Z Z@[,d @ABw.`The 456-bit packets are formed from the speech signal Each 20 ms of the coded speech at 13 kbps forms a 260-bit packet The first 50 most significant bits receives a 3-bit CRC code protection first, and then they are added to the second group of 132 bits with lower importance and a 4-bit tail that is all zeros The resulting 132 + 53 + 4 = 189 bits are then encoded with a convolutional encoder that doubles number of bits to 378 The convolutional code provides for error correction capabilities The 378 coded bits are added to the 78 least important speech-coded bits to form a 456 bits packet every 20 msa Pa~5x/Three classes of speech coded bits The first class of 50 bits receives both CRC error detection and the rate convolutional error correcting coding protection The second 132 bits receive only the convolutional encoding protection The last 78 bits receives no protection Therefore, the speech coder can protect the more important bits representing larger values of voltages by assigning them into different categories Zy0The formation of the 456 bit packets for 9,600 bps data The 192 bits of information are accompanied by 48 bits of signaling information and 4 tail bits to form a 244 bits packet that is then expanded to 456 bits using a rate punctured convolutional encoder Punctured coding can eliminate the need for doubling the number of transmitted bits by eliminating (puncturing) a certain number of bits The resulting 456 bits are turned to NBs similar to the speech packets Z6z1Signaling channels using the NB as the channel over-the-air-interface use 184 signaling bits to convey the signaling message These bits are first block coded with 40 additional parity check bits and 4 tail bits to form a 228-bits block The 228-bits block is then coded with a rate convolutional encoder to form a 456 bits packet occupying a 20 ms slot that is turned to a burst for transmission P79Pr] /9 ZW1M(  x }Root EntrydO) ɓRvGPicturesCurrent User#SummaryInformation(LU      !"#$%&'()*+,-./0123456789:;<=>?@IJKLMNOPQRSTUVWXYZ[\]^_`abcdefghijklmnopqrstuvwxyz|}~H|      !"#$%&'()*+,-./0123456789:;<=>?@ABCDEFGHIJKLMNOPQRSTUVWXYZ[\]^_`abcdefghijklmnopqrstuvwxyz{}~ _s..ITC՜.+,D՜.+,D    ( Letter Paper (8.5x11 in)Tel-Aviv University> Times New RomanTimes New Roman (Hebrew)Tahoma Wingdings! $   ,L#%)! 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Normal Burstj3 bits (zeros) TBs at the beginning and the end of the packet: To ramp on and off the radiated power and initiate the convolutional decoding of the data Equivalent to 8.25 bits for GP Two sets of 58 bits (encrypted), includes two flags bits at the end of each part of the data 26 bits training sequence, is used to train the adaptive equalizer at the receiver N@ Z[ Z Z@[,d @ABw. `The 456-bit packets are formed from the speech signal Each 20 ms of the coded speech at 13 kbps forms a 260-bit packet The first 50 most significant bits receives a 3-bit CRC code protection first, and then they are added to the second group of 132 bits with lower importance and a 4-bit tail that is all zeros The resulting 132 + 53 + 4 = 189 bits are then encoded with a convolutional encoder that doubles number of bits to 378 The convolutional code provides for error correction capabilities The 378 coded bits are added to the 78 least important speech-coded bits to form a 456 bits packet every 20 msa Pa~5x/ Three classes of speech coded bits The first class of 50 bits receives both CRC error detection and the rate convolutional error correcting coding protection The second 132 bits receive only the convolutional encoding protection The last 78 bits receives no protection Therefore, the speech coder can protect the more important bits representing larger values of voltages by assigning them into different categories Zy0 The formation of the 456 bit packets for 9,600 bps data The 192 bits of information are accompanied by 48 bits of signaling information and 4 tail bits to form a 244 bits packet that is then expanded to 456 bits using a rate punctured convolutional encoder Punctured coding can eliminate the need for doubling the number of transmitted bits by eliminating (puncturing) a certain number of bits The resulting 456 bits are turned to NBs similar to the speech packets Z6z1 Signaling channels using the NB as the channel over-the-air-interface use 184 signaling bits to convey the signaling message These bits are first block coded with 40 additional parity check bits and 4 tail bits to form a 228-bits block The 228-bits block is then coded with a rate convolutional encoder to form a 456 bits packet occupying a 20 ms slot that is turned to a burst for transmission P79P 0 f(    6(f U )Synchronization Burst   0L   U3 bits (zeros) TBs at the beginning and the end of the packet The 2*39 bits coded data are used for the specific task of identifying the network Equivalent to 8.25 bits for GP The BS broadcast the SB and MTs use it for initial training of the equalizer as well as in initial learning of the network identity and to synchronize time slots. V ZVC  ZA ??H  0޽h ? 33z33___PPT10i.}I+D=' = @B +rWw-jW>1M(  x };0$Photo Editor Photo MSPhotoEd.30@Microsoft Photo Editor 3.0 Photok8www.ccse.kfupm.edu.sa/~tarekFhttp://www.ccse.kfupm.edu.sa/~tarekn/ 0|DTimes New RomanTT`vܖ 0ܖDTimes New Roman (Hebrew) 0ܖ DTahomaew Roman (Hebrew) 0ܖ"0DWingdingsRoman (Hebrew) 0ܖ@DArialngsRoman (Hebrew) 0ܖ A.@  @@``  @n?" dd@  @@``_@,whoosh.wav.WAV 10103RIFFWAVEfmt ++data~~~~~~~~~~~~~~~~~~~~~~~~~~~|||~~~~~zvtvxz|~zvrnlrv||vtrpptz~|xvtv|~~zxvvvz|~xrlhntzzvrrpprrx~|j[QU_|bICCYn[ICY~zlnh]_r|]SUSSjz|x__l~v_]drnUb|nfd_]d]5=rrnj]jz~lMldrx[[_f|YQfWK_xh[zx[CIjzxxdSQz|_fI9WӹM;QnvK;OUx~xj]]YS~ɵlM?plM;CGpٵ[)Kh|% %;xtKQS]ɖbGr|lSnvz~nfS[nëx;Az=+AYݻ|=/1r_ ?|潄W5/Czãf)/pvbMQr|O=OtjdhjlG?G_ɊK3לdQCMppW;1SŷAMz/#?bx͖SAM[hvhYp~~zrvt[]ptWOUtxxd]v~vvxzd_xzh_nrSQltbdp~_lrQ_l][tf]W]~hWfp|fWhnhbU[hzlSCWbYbnxpdhjvjM9Ot]GQ[dpp~hhhdpx~xh]Yntnrp]dlvjQMb|vdjpzxzztljr||_[r~~jb_j|z|xpp~~v]Wh||zx|x|zzndhpxr]Yfntzjl|z||~vppnrzphrxz|~|xtrjjtv~~vz|z||xrrv~xrprtz|||vzxvx|xtx~~~~~~~zxxxx|zxz~~~rrz~|xz~~|vtx|zxz|~~~||zx|||~~zz|zz~~~~|~~||~~||zz|~||z~~~~zxzz|~~~~|~~~|~||~~~~~~~~~~~~~|||~~~~~~~~~~~~~||~~||~||~~~~|||~~~~||||~~~~~~||||~~~~~~~~~~~|~~~~|zz~~~~~~~||||~~||~~~~~|||~~~~~|||~|~|~~~~|z|~~~~~~~|||~~~~~~~~||~~~~~~~~ ++#x'! $   ,L#%)! I@)*jGg"2&pZ :GKY&~fE  >A   N1,   0     >       0       b$!D6.7Yx,<Gb$DR1 `Gb$rS_Cgy1B!Wb$. 5,JFyb$W'=nb$YdC(dM 8^b$C1|*+0Bqb$?!J)Zrb$`PsfA1b$/oA"yD-(Ob$(2W V]~P m>b$R?4l: Xv [xNb$/PCO,<.Mb$=J,QZ9L6d3b$IO8 $x$G$$$b$yaQaFOb$UW& Rb$^Jƈih.b$9M/N9ЎVt<b$t!M-Q܁ߴ`Jb$z 4H쀆WKV|Wb$&Jb:8&nb$9b Tޢ::jdX ~b$'sǚQ~o5^x 0e0e A@A5%8c8c     ?1d0u0@Ty2 NP'p<'p@A)BCD|E? ff3f@mg4KdKd 0@pp| p@  <4dd x 0T<4dd x 0Tg47d7d 0p p j:ʚ;dt8ʚ;<4dddd  x 0 ___PPT10e ZZ." tarek....62___PPT9/ 0?Z 4/12/2004 ,Communication NetworksO =!-Mobile Computing COE 446 GSM* $;Tarek Sheltami KFUPM CCSE COE www.ccse.kfupm.edu.sa/~tarek <P<k 0:<=>|3{2 GSM bands: 850 MHz, 900 MHz, 1800 MHz and 1900 MHz Dual-band 850/900 MHz Tri-Band 900/1800/1900 MHz Quad-band 850/900/1800/1900 MHz 25 MHz for each direction divided into 124 channels of 200 kHz with 100 kHz band at the two edges Each carrier supports 8 time slots for TDMA operation Data rate carrier is 270.833 kbps Duration of each bit is 3.69 s The user transmission packet burst is fixed at 557 s Burst size * bit duration (156.25 bits*3.69s)   P{ P P1 P {b  6b,bJ]5.8? Normal Burstj3 bits (zeros) TBs at the beginning and the end of the packet: To ramp on and off the radiated power and initiate the convolutional decoding of the data Equivalent to 8.25 bits for GP Two sets of 58 bits (encrypted), includes two flags bits at the end of each part of the data 26 bits training sequence, is used to train the adaptive equalizer at the receiver N@ Z[ Z Z@[,d @ABw. `The 456-bit packets are formed from the speech signal Each 20 ms of the coded speech at 13 kbps forms a 260-bit packet The first 50 most significant bits receives a 3-bit CRC code protection first, and then they are added to the second group of 132 bits with lower importance and a 4-bit tail that is all zeros The resulting 132 + 53 + 4 = 189 bits are then encoded with a convolutional encoder that doubles number of bits to 378 The convolutional code provides for error correction capabilities The 378 coded bits are added to the 78 least important speech-coded bits to form a 456 bits packet every 20 msa Pa~5x/ Three classes of speech coded bits The first class of 50 bits receives both CRC error detection and the rate convolutional error correcting coding protection The second 132 bits receive only the convolutional encoding protection The last 78 bits receives no protection Therefore, the speech coder can protect the more important bits representing larger values of voltages by assigning them into different categories Zy0 The formation of the 456 bit packets for 9,600 bps data The 192 bits of information are accompanied by 48 bits of signaling information and 4 tail bits to form a 244 bits packet that is then expanded to 456 bits using a rate punctured convolutional encoder Punctured coding can eliminate the need for doubling the number of transmitted bits by eliminating (puncturing) a certain number of bits The resulting 456 bits are turned to NBs similar to the speech packets Z6z1 Signaling channels using the NB as the channel over-the-air-interface use 184 signaling bits to convey the signaling message These bits are first block coded with 40 additional parity check bits and 4 tail bits to form a 228-bits block The 228-bits block is then coded with a rate convolutional encoder to form a 456 bits packet occupying a 20 ms slot that is turned to a burst for transmission P79Prz9Vc1