1、 ANSI/TIA/EIA-136-121-A-1999 APPROVED: NOVEMBER 29, 1999 REAFFIRMED: JUNE 19, 2003 REAFFIRMED: MAY 28, 2013 WITHDRAWN: JUNE 12, 2015 TIA/EIA-136-121-A (Revision of TIA/EIA-136-121) November 1999TDMA Cellular PCS Digital Control Channel Layer 1 NOTICE TIA Engineering Standards and Publications are de
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17、ON, OR THE SAFETY OR HEALTH EFFECTS OF THE CONTENTS OR ANY PRODUCT OR SERVICE REFERRED TO IN THE DOCUMENT OR PRODUCED OR RENDERED TO COMPLY WITH THE CONTENTS. TIA SHALL NOT BE LIABLE FOR ANY AND ALL DAMAGES, DIRECT OR INDIRECT, ARISING FROM OR RELATING TO ANY USE OF THE CONTENTS CONTAINED HEREIN, IN
18、CLUDING WITHOUT LIMITATION ANY AND ALL INDIRECT, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES (INCLUDING DAMAGES FOR LOSS OF BUSINESS, LOSS OF PROFITS, LITIGATION, OR THE LIKE), WHETHER BASED UPON BREACH OF CONTRACT, BREACH OF WARRANTY, TORT (INCLUDING NEGLIGENCE), PRODUCT LIABILITY OR OTHERWISE, EV
19、EN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGES. THE FOREGOING NEGATION OF DAMAGES IS A FUNDAMENTAL ELEMENT OF THE USE OF THE CONTENTS HEREOF, AND THESE CONTENTS WOULD NOT BE PUBLISHED BY TIA WITHOUT SUCH LIMITATIONS. TIA/EIA-136-121-AiContents1. Service Access Points . 12. TDMA Frame Structure 22.
20、1 AG 32.2 SCF. 32.2.1 BRI . 32.2.2 CPE. 42.2.3 R/N . 42.3 DATA. 42.3.1 Channel Encoding . 42.3.2 Interleaving . 52.3.2.1 Forward DCCH 52.3.2.2 Reverse DCCH. 62.4 G. 82.5 PREAM. 82.6 R. 82.7 RSVD 82.8 CSFP. 82.9 SYNC . 92.10 SYNC+ . 92.11 Transmit Offset . 93. Superframe 104. Hyperframe 115. Paging F
21、rame. 126. PCH Displacement. 147. SPACH Message Continuation 168. Mobile Station PCH Allocation. 178.1 DCCH Selection 188.2 PCH Subchannel Selection 208.3 Hyperframe Selection 209. Subchanneling of the RACH . 219.1 General . 219.2 SCF Flags - RDCCH and FDCCH Burst Associations 2110. Radio Frequency
22、Carrier Spacing and Designation. 2411. Power Output and Modulation Characteristics 2512. Change History for TIA/EIA-136-121-A. 26TIA/EIA-136-121-AiiList of TablesTable 1 Slot Allocations10Table 2 Paging Frame Classes Definition13Table 3 Selected DCCH Rate and Slot Assignment.19TIA/EIA-136-121-AiiiLi
23、st of FiguresFigure 1 Frame Structure. 2Figure 2 Normal Slot Format MS BMI on DCCH. 2Figure 3 Abbreviated Slot Format MS BMI on DCCH 2Figure 4 Slot Format BMI MS on DCCH 2Figure 5 Bit Mapping of the BRI Field 3Figure 6 Bit Mapping of the CPE Field . 4Figure 7 Bit Mapping of the R/N Field 4Figure 8 P
24、artitioning of the Data Before Channel Encoding 4Figure 9 CSFP Bit Allocation 9Figure 10 Superframe Structure. 10Figure 11 Hyperframe Structure 11Figure 12 Paging Frame Classes 1, 2, 3, 4 . 13Figure 13 PCH Displacement 15Figure 14 SPACH Message Continuation (PCH) . 16Figure 15 RACH Subchannels . 22F
25、igure 16 RACH Subchannel Dialogue . 23TIA/EIA-136-121-A11. Service Access Points1Layer 1 provides the following service access points (SAPs) to layer 2 both on mobile2station and BMI side. Refer to TIA/EIA-136-100 and TIA/EIA-136-122 for the BMI,3MS Protocol Reference models, and for the primitives
26、on the mobile station and BMI4sides from a layer 2 perspective.5 F-BCCH SAP6 E-BCCH SAP7 S-BCCH SAP8 SPACH SAP9 SCF SAP10 Normal RDCCH SAP11 Abbreviated RDCCH SAP.12TIA/EIA-136-121-A22. TDMA Frame Structure1The frame structure may be depicted as follows:2Figure 1 Frame Structure3One Frame = 1944 bit
27、s (972 Symbols) = 40 ms. (25 frames per second)Time Slot 1 Time Slot 2 Time Slot 3 Time Slot 4 Time Slot 5 Time Slot 6One TDMA BlockOne Time SlotA TDMA frame is 40 milliseconds long and consists of six equally sized time slots (146), each 162 symbols (324 bits) in length. A TDMA Block consists of ha
28、lf a TDMA5frame (either slots 1 to 3 or slots 4 to 6).6The Bit Position (BP) of forward and reverse slots/bursts are numbered sequentially7from 1 to 324.8In the forward direction, the first transmitted bit of the SYNC has BP = 1 and the last9transmitted bit of the RSVD field has BP = 324. In the rev
29、erse direction, the first10transmitted bit of the Guard has BP = 1. In the normal slot format, the last transmitted11bit of the DATA field has BP = 324. In the abbreviated slot format, the last transmitted12bit of the AG field has BP = 324.13Figure 2 Normal Slot Format MS BMI on DCCH14G R PREAM SYNC
30、 DATA SYNC+ DATA6 6 16 28 122 24 122Figure 3 Abbreviated Slot Format MS BMI on DCCH15G R PREAM SYNC DATA SYNC+ DATA AG6 6 16 28 122 24 78 44Figure 4 Slot Format BMI MS on DCCH16SYNC SCF DATA CSFP DATA SCF RSVD28 12 130 12 130 10 2TIA/EIA-136-121-A3Interpretation of the fields is as follows:1AG - Gua
31、rd Time for Abbreviated RACH BurstCSFP - Coded Super Frame PhaseDATA - Coded Information BitsG - Guard TimePREAM - PreambleR - Ramp TimeRSVD - Reserved Field, set to 11SCF - Shared Channel FeedbackSYNC - SynchronizationSYNC+ - Additional Synchronization2.1 AG2The AG (Abbreviated Guard) field denotes
32、 guard time for the abbreviated access burst3format. The field is 22 symbols (44 bits) in length. During this time the mobile station4shall maintain carrier off condition. Note that the first 3 symbols of AG consist of Ramp.52.2 SCF6The SCF (Shared Channel Feedback) field is used to control accesses
33、 on the RACH and7is comprised of the following:8 Busy/Reserved/Idle (BRI)9 Received/Not Received (R/N)10 Coded Partial Echo (CPE).112.2.1 BRI12The BRI (Busy/Reserved/Idle) is a 6-bit field and is mapped into FDCCH slots as shown13in Figure 5. Encoding of the BRI is described in TIA/EIA-136-122.14Fig
34、ure 5 Bit Mapping of the BRI Field15BRI5BRI4BRI3BRI2BRI1BRI0BP29BP33BP37BP313BP317BP321TIA/EIA-136-121-A42.2.2 CPE1The CPE (Coded Partial Echo) is an 11-bit field and is mapped into FDCCH slots as2shown in Figure 6. Encoding of the CPE is described in TIA/EIA-136-122.3Figure 6 Bit Mapping of the CPE
35、 Field4d6d5d4d3d2d1d0b3b2b1b0BP30BP32BP34BP36BP38BP40BP314BP316BP318BP320BP3222.2.3 R/N5The R/N (Received/Not Received) is a 5-bit field and is mapped into FDCCH slots as6shown in Figure 7. Encoding of the R/N is described in TIA/EIA-136- 122.7Figure 7 Bit Mapping of the R/N Field8R/N4R/N3R/N2R/N1R/
36、N0BP31BP35BP39BP315BP3192.3 DATA9User data bits (coded information bits) are mapped onto the DATA field for10transmission. In the forward direction, the field is 260 bits in length. In the reverse11direction, the length of the DATA field is 244 bits for the normal slot format and 20012bits for the a
37、bbreviated slot format.132.3.1 Channel Encoding14The logical channels BCCH, SPACH and RACH (normal and abbreviated) use a rate151/2 convolutional encoding. The same encoding polynomials as for full-rate speech (see16TIA/EIA-136-420) are used. The first bit received from layer 2 is the left most bit
38、in17Figure 8 and shall be the first bit delivered to channel encoding. The last five bits sent to18the channel encoder are set to zero (tail bits).19Figure 8 Partitioning of the Data Before Channel Encoding20L2 Header L3 Information CRC Tail109/101/79 16 5The combined length of the L2 Header and L3
39、Information fields are as follows:21SPACH and BCCH: = 130-16-5 = 10922RACH (normal length): = 122-16-5 = 10123RACH (abbreviated length) = 100-16-5 = 7924TIA/EIA-136-121-A52.3.2 Interleaving1For all channel types and burst lengths, all bits are sent within one burst (i.e., only intra-2burst interleav
40、ing is performed). The output of the interleaver is sequentially mapped3into the DATA fields, beginning with the first bit (leftmost bit) of the first DATA field4(leftmost DATA field). The DATA field bits are transmitted over the air interface5beginning with the first bit of the first DATA field.62.
41、3.2.1 Forward DCCH7The 260 encoded data bits are interleaved in a 13-row by 20-column matrix. The data8bits are placed into a rectangular interleaving array as shown in the matrix below,9where the bits have been numbered 0 - 259, corresponding to their order at the output of10the encoder. The data b
42、its are entered into the array column-wise. The bits are then11transmitted row-wise using the following algorithm:12Do row = 0,2,4,6,8,10,1213Do column = 0 to 1914Transmit (array(row, column)15End Do16End Do17Do row = 1,3,5,7,9,1118Do column = 0 to 1919Transmit (array(row, column)20End Do21End Do220
43、 13 26 . 234 2471 14 27 . 235 2482 15 28 . 236 249. . . . . .11 24 37 . 245 25812 25 38 . 246 259Thus, the bits are transmitted in the order of:23 0,13,.,247 (row 0),24. 12,25,.,259 (row 12),25 1,14,.,248 (row 1),26. 11,24,.,258 (row 11).27TIA/EIA-136-121-A62.3.2.2 Reverse DCCH1Normal Length Burst2T
44、he 244 encoded data bits are interleaved in a 12-row by 21-column matrix with a3partial column of 4 bits in column 21. The data bits are placed into a rectangular4interleaving array as shown in the matrix below, where the bits have been numbered50-243, corresponding to their order at the output of t
45、he encoder. The data bits are6entered into the array column-wise. The bits are then transmitted row-wise using the7following algorithm:8Do row = 0,29Do column = 0 to 2010Transmit (array(row, column)11End Do12End Do13Do row = 4,6,8,1014Do column = 0 to 1915Transmit (array(row, column)16End Do17End Do
46、18Do row = 1,319Do column = 0 to 2020Transmit (array(row, column)21End Do22End Do23Do row = 5,7,9,1124Do column = 0 to 1925Transmit (array(row, column)26End Do27End Do280 12 24 . 228 2401 13 25 . 229 2412 14 26 . 230 2423 15 27 . 231 243. . . . . N/A11 23 35 . 239 N/ANote: N/A means not applicable.2
47、9TIA/EIA-136-121-A7Thus, the bits are transmitted in the order of:1 0,12,.,240 (row 0),2. 10,22,.,238 (row 10),3 1,13,.,241 (row 1),4. 11,23,.,239 (row 11).5Abbreviated Length Burst6The 200 encoded data bits are interleaved in a 12-row by 17-column matrix with a7partial column of 8 bits in column 17
48、. The data bits are placed into a rectangular8interleaving array as shown in the matrix below, where the bits have been numbered90-199, corresponding to their order at the output of the encoder. The data bits are10entered into the array column-wise. The bits are then transmitted row-wise using the11
49、following algorithm:12Do row = 0,2,4,613Do column = 0 to 1614Transmit (array(row, column)15End Do16End Do17Do row = 8, 1018Do column = 0 to 1519Transmit (array(row, column)20End Do21End Do22Do row = 1,3,5,723Do column = 0 to 1624Transmit (array(row, column)25End Do26End Do27Do row = 9, 1128Do column = 0 to 1529Transmit (array(row, column)30End Do31End Do320 12 24 . 180 1921 13 25 . 181 193. . . . . .7 19 31 . 187 1998 20 32 . 188 N/A9 21 33 . 189 N/A10 22 34 . 190 N/A11 23 35 . 191 N/ATIA/EIA-136-121-A8Thus, the bits are transmitted in the
