( 7.1). , - , 4.615 . , , , 7.1.
. 7.14 , , 7.1. Գ 3 26- 26 3, 26 TDMA ( 7.14). 26 TDMA ( 7.14). ', 7.14 , , 1/8 .
7.1 .
.7.14 26-
1. ֲ ò ˲. .7.15 .7.1.2.4 26- , . - TDMA. , , .
- : TCH/FS+FACCH/FS+SACCH/FS (. 7.15). , full-rate (TCH/FS). , , ( TCH/FS), S SACCH, . . 7.15 8,33 (120) , 8,33*24=200/. . , 20- , (216.67 /, TCH/FS - 200 /) , SACCH. .7.1.3.1 FACCH, , TCH/FS.
- II III (. 7.15). half-rate (TCH/HS). III . 7.15 ( һ) , ( t) . SACCH, , , S s . 7.156. , , 100 / ( 100 /). II III , , TCI/S. FACC .
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2. ֲ ò ˲ֲ ˲. IV, V, VI, VII 7.1 . , -.
) ful-rate; b) ful-rate.
. 7.15 ,
7.1
TCH/FS + FACCH + SACCH/FS | ||
TCH/HS(0,1) + FACCH/HS(0,1) + SACCH/HS(0,1) | half-rate | |
TCH/HS(0) + FACCH/HS(0) + SACCH/HS(0) + TCH/HS(1) + FACCH/HS(1) + SACCH/HS(1) | ||
IV | FCCH + SCH + CCCH + BCCH + SDCCH/4 + SACCH/4 | 䳿 VII |
V | FCCH + SCH + CCCH + BCCH + SDCCH/4 + SACCH/4 | IV VII |
VI | CCCH + BCCH | IV |
VII | SDCCH/8 + SACCH/8 | 䳿 IV |
- IV: FCCH+SCH+CCCH+BCCH . 7.16. FCCH, SCH, , AGCH. , . , , . ', , AGCH ' GSM. , . IV , . (. beacom frequency). , , , . IV, ( RACH). . IV , , VI, . , IV .7.1.3.3.
IV , . . , V.
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- V: FCCH+SCH+CCCH+BCCH+SDCCH/4+SACCH/4 . 7.17. SDCCH/4 SACCH/4 DCC SACC. . V , . : , . V IV.
. 7.16. IV
SACC . , SACCH 2 /.
- VI: +. , , , IV . VI . IV, , VI : , . 䳺 FCCH SCH .
- VII: SDCCH/8+SACCH/8 . 7.18. 䳿 IV, ' (. ). .7.1.3.1 DCCH. SDCCH/8 SACCH/8 DCCII SACCH. .
, GSM 7.1.
. 7.19 , , . (. 7.19), . 0 TDMA V . . , 7 . . 7.19 , , . IV , (. beacom frequency), VI 2 . 1 VI, . , 29 .
, , .7.1.3.1 7.1.3.2.
7.1.3.3. ,
, . .
. ϳ , FCCH, SCH i BCCH. i , , . ( ) ' , (. dummy bursts). , . .
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³ , . FCCH ( 67 ). ϳ , SCH, FCCH. SCH TDMA . . , ( ). 2 5 ( 20 ).
. , .
- .
7.2. ³ , , . , SDCCH. , , VLR, LR, .
- 璺 .
, 7.3 ' . , , SDCC ( ), ( ).
. 7.17 , V
. 7.18 , VII
a) , b) .
. 7.19 ,
GSM
GSM ' : 890-915 - ( ); 935-960 - ( ). , GSM, , 200 . 124 ( 125 , 100 ). , , , 45 . . ֳ .
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:
F(n)=890.2+0.2(n-1), ;
F(n)=890.2+0.2(n-1)+45, ,
n = 1..124 - .
.8.2. (RX) (TX) .
.8.11 GSM
8.2 GSM 900
Dec | Hex | Dec | Hex | ||||
890.20 | 935.20 | 3F | 902.60 | 947.60 | |||
890.40 | 935.40 | 902.80 | 947.80 | ||||
890.60 | 935.60 | 903.00 | 948.00 | ||||
890.80 | 935.80 | 903.20 | 948.20 | ||||
891.00 | 936.00 | 903.40 | 948.40 | ||||
891.20 | 936.20 | 903.60 | 948.60 | ||||
891.40 | 936.40 | 903.80 | 948.80 | ||||
891.60 | 936.60 | 904.00 | 949.00 | ||||
891.80 | 936.80 | 904.20 | 949.20 | ||||
0A | 892.00 | 937.00 | 904.40 | 949.40 | |||
0B | 892.20 | 937.20 | 904.60 | 949.60 | |||
0C | 892.40 | 937.40 | 4A | 904.80 | 949.80 | ||
0D | 892.60 | 937.60 | 4B | 905.00 | 950.00 | ||
0E | 892.80 | 937.80 | 4C | 905.20 | 950.20 | ||
0F | 893.00 | 938.00 | 4D | 905.40 | 950.40 | ||
893.20 | 938.20 | 4E | 905.60 | 950.60 | |||
893.40 | 938.40 | 4F | 905.80 | 950.80 | |||
893.60 | 938.60 | 906.00 | 951.00 | ||||
893.80 | 938.80 | 906.20 | 951.20 | ||||
894.00 | 939.00 | 906.40 | 951.40 | ||||
894.20 | 939.20 | 906.60 | 951.60 | ||||
894.40 | 939.40 | 906.80 | 951.80 | ||||
894.60 | 939.60 | 907.00 | 952.00 | ||||
894.80 | 939.80 | 907.20 | 952.20 | ||||
895.00 | 940.00 | 907.40 | 952.40 | ||||
1A | 895.20 | 940.20 | 907.60 | 952.60 | |||
1B | 895.40 | 940.40 | 907.80 | 952.80 | |||
1C | 895.60 | 940.60 | 5A | 908.00 | 953.00 | ||
1D | 895.80 | 940.80 | 5B | 908.20 | 953.20 | ||
1E | 896.00 | 941.00 | 5C | 908.40 | 953.40 | ||
1F | 896.20 | 941.20 | 5D | 908.60 | 953.60 | ||
896.40 | 941.40 | 5E | 908.80 | 953.80 | |||
896.60 | 941.60 | 5F | 909.00 | 954.00 | |||
896.80 | 941.80 | 909.20 | 954.20 | ||||
897.00 | 942.00 | 909.40 | 954.40 | ||||
897.20 | 942.20 | 909.60 | 954.60 | ||||
897.40 | 942.40 | 909.80 | 954.80 | ||||
897.60 | 942.60 | 910.00 | 955.00 | ||||
897.80 | 942.80 | 910.20 | 955.20 | ||||
898.00 | 943.00 | 910.40 | 955.40 | ||||
898.20 | 943.20 | 910.60 | 955.60 | ||||
2A | 898.40 | 943.40 | 910.80 | 955.80 | |||
2B | 898.60 | 943.60 | 911.00 | 956.00 | |||
2C | 898.80 | 943.80 | 6A | 911.20 | 956.20 | ||
2D | 899.00 | 944.00 | 6B | 911.40 | 956.40 | ||
2E | 899.20 | 944.20 | 6C | 911.60 | 956.60 | ||
2F | 899.40 | 944.40 | 6D | 911.80 | 956.80 | ||
899.60 | 944.60 | 6E | 912.00 | 957.00 | |||
899.80 | 944.80 | 6F | 912.20 | 957.20 | |||
900.00 | 945.00 | 912.40 | 957.40 | ||||
900.20 | 945.20 | 912.60 | 957.60 | ||||
900.40 | 945.40 | 912.80 | 957.80 | ||||
900.60 | 945.60 | 913.00 | 958.00 | ||||
900.80 | 945.80 | 913.20 | 958.20 | ||||
901.00 | 946.00 | 913.40 | 958.40 | ||||
901.20 | 946.20 | 913.60 | 958.60 | ||||
901.40 | 946.40 | 913.80 | 958.80 | ||||
3A | 901.60 | 946.60 | 914.00 | 959.00 | |||
3B | 901.80 | 946.80 | 914.20 | 959.20 | |||
3C | 902.00 | 947.00 | 7A | 914.40 | 959.40 | ||
3D | 902.20 | 947.20 | 7B | 914.60 | 959.60 | ||
3E | 902.40 | 947.40 | 7C | 914.80 | 959.80 |
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. GSM . (-, ) 576.9 . , .
GSM
GSM . , , . г , . : (. 8.12).
.8.12
, , , , '. : , .
1. . . , '.
- FCCH (. Frequency Correction CHannel) , .
- SCH (. Synchronization Channel) (BSIC), , TDMA .
- (. Broadcast Control CHannel) : LAC, MNC, , .
2. . -.
- (. Paging CHannel) ' . , '.
- RACH (. Random Access CHannel) . MS .
- AGCH (. Access Grant CHannel) , .
3 . - . , , ' .
- SDCCH (. Stand-alone Dedicated Control CHannel) , ' .
- SACCH (. Slow Associated Control CHannel) , . , , , '.
- FACCH (. Fast Associated Control CHannel) ' . , , , - (SF) .
8.2.2.2. ( )
. - -.
- (. Full-rate) . 33.8 /.
- (. Half-rate) . , . , .
GSM () TDMA, 4.615 ms. 577 , .
, .
TDMA (. multiframe). :
- ( 120 ms) 26 TDMA. 24 - 1-12 14-25, 13 SACCH, 26 ( SACCH ).
- ( 235 ms) 51 TDMA.
. . (. superframe), 1326 TDMA. 26 , 51 .
2048 , 3 28 53 760 ms, 2715648 . , .
, . 13 /, 13 / ( 33 /, ). - -, 64 /. , - GSM- - ( ). .
䳺 A-ter , (MSC) - -. A-ter , 4 16 / A-ter 1 64 /. - (), , . .
.8.58
, -.
. (SubRate Switch), , , 64 /.