4 The block structures

05.013GPPGeneral descriptionPhysical layer on the radio pathTS

The different block structures are described in more detail in 3GPP TS 05.03 (Channel coding). A summarised description appears in table 1, in terms of net bit rate, length and recurrence of blocks.

Table 1: Channel block structures

Type of channel

net bit rate

(kbit/s)

block length

(bits)

block recurrence

(ms)

full rate speech TCH1

13,0

182 + 78

20

enhanced full rate speech TCH1

12,2

170 + 74

20

half rate speech TCH2

5,6

95 + 17

20

Adaptive full rate speech TCH (12.2 kbit/s)

12.2

244

20

Adaptive full rate speech TCH (10.2 kbit/s)

10.2

204

20

Adaptive full rate speech TCH (7.95 kbit/s)

7.95

159

20

Adaptive full rate speech TCH (7.4 kbit/s)

7.4

148

20

Adaptive full rate speech TCH (6.7 kbit/s)

6.7

134

20

Adaptive full rate speech TCH (5.9 kbit/s)

5.9

118

20

Adaptive full rate speech TCH (5.15 kbit/s)

5.15

103

20

Adaptive full rate speech TCH (4.75 kbit/s)

4.75

95

20

Adaptive half rate speech TCH (7.95 kbit/s)8

7.95

123 + 36

20

Adaptive half rate speech TCH (7.4 kbit/s)8

7.4

120 + 28

20

Adaptive half rate speech TCH (6.7 kbit/s)8

6.7

110 + 24

20

Adaptive half rate speech TCH (5.9 kbit/s)8

5.9

102 + 16

20

Adaptive half rate speech TCH (5.15 kbit/s)8

5.15

91 + 12

20

Adaptive half rate speech TCH (4.75 kbit/s)8

4.75

83 + 12

20

data E-TCH (43,2 kbit/s) 3

data E-TCH (32,0 kbit/s) 3

data E-TCH (28,8 kbit/s)3

43,5

32,0

29,0

870

640

580

20

20

20

data TCH (14,4 kbit/s) 3

data TCH (9,6 kbit/s)3

14,5

12,0

290

60

20

5

data TCH (4,8 kbit/s)3

6,0

60

10

data TCH (£ 2,4 kbit/s)3

3,6

36

10

PDTCH/F (CS-1)

9.05

181

PDTCH/F (CS-2)

13.4

268

PDTCH/F (CS-3)

15.6

312

PDTCH/F (CS-4)

21.4

428

PDTCH/H (CS-1)

4.525

181

PDTCH/H (CS-2)

6.7

268

PDTCH/H (CS-3)

7.8

312

PDTCH/H (CS-4)

10.7

428

PDTCH/F (MCS-1)10

10.6

212

PDTCH/F (MCS-2)10

13.0

260

PDTCH/F (MCS-3)10

16.6

332

PDTCH/F (MCS-4)10

19.4

388

PDTCH/F (MCS-5)10

24.05

481

PDTCH/F (MCS-6)10

31.25

625

PDTCH/F (MCS-7)10

47.45

949

PDTCH/F (MCS-8)10

57.05

1141

PDTCH/F (MCS-9)10

61.85

1237

PDTCH/H (MCS-1)10

5.3

212

PDTCH/H (MCS-2)10

6.5

260

PDTCH/H (MCS-3)10

8.3

332

PDTCH/H (MCS-4)10

9.7

388

PDTCH/H (MCS-5)10

12.025

481

PDTCH/H (MCS-6)10

15.625

625

PDTCH/H (MCS-7)10

23.725

949

PDTCH/H (MCS-8)10

28.525

1141

PDTCH/H (MCS-9)10

30.925

1237

(continued)

Table 1 (concluded): Channel block structures

Type of channel

net bit rate

(kbit/s)

block length

(bits)

block recurrence

(ms)

full rate FACCH (FACCH/F)

9,2

184

20

half rate FACCH (FACCH/H)

enhanced circuit switched full rate FACCH (E-FACCH/F)

4,6

9.2

184

184

40

20

SDCCH

598/765 ( 0,782)

184

3 060/13 (235)

SACCH (with TCH)4

115/300 ( 0,383)

168 + 16

480

SACCH (with SDCCH)4

299/765 ( 0,391)

168 + 16

6 120/13 ( 471)

PACCH/F7

181

PACCH/H7

181

BCCH

598/765 ( 0,782)

184

3 060/13 ( 235)

PBCCH6

s*181/120 (1.508)

181

120

AGCH5

n*598/765 ( 0,782)

184

3 060/13 ( 235)

PAGCH7

181

NCH5

m*598/765 ( 0,782)

184

3 060/13 ( 235)

PNCH7

181

PCH5

p*598/765 ( 0,782)

184

3 060/13 ( 235)

PPCH7

181

RACH5

r*26/765 ( 0,034)

8

3 060/13 ( 235)

PRACH (8 bit Access Burst)7

8

PRACH (11 bit Access Burst)7

11

CBCH

598/765 ( 0,782)

184

3 060/13 ( 235)

CTSBCH-SB

25/240 ( 0,104)

25

240

CTSPCH

184/240 ( 0,767)

184

240

CTSARCH

14*25/240 ( 0,104)

25

240

CTSAGCH

2*184/240 ( 0,767)

184

240

NOTE 1: For full rate speech, the block is divided into two classes according to the importance of the bits (182 bits for class I and 78 bits for class II).

For enhanced full rate speech, the block is divided into two classes according to the importance of the bits (170 bits for class I and 74 bits for class II).

NOTE 2: For half rate speech, the block is divided into two classes according to the importance of the bits (95 bits for class I and 17 bits for class II).

NOTE 3: For data services, the net bit rate is the adaptation rate as defined in 3GPP TS 04.21.

NOTE 4: On SACCH, 16 bits are reserved for control information on layer 1, and 168 bits are used for higher layers.

NOTE 5: CCCH channels are common to all users of a cell; the total number of blocks (m, n, p, r) per recurrence period is adjustable on a cell by cell basis and depends upon the parameters (BS_CC_CHANS, BS_BCCH_SDCCH_COMB, BS_AG_BLKS_RES and NCP) broadcast on the BCCH and specified in 3GPP TS 05.02 and 3GPP TS 04.08.

NOTE 6: The total number of PBCCH blocks (s) is adjustable on a cell by cell basis and depends upon the parameter BS_PBCCH_BLKS broadcast on the first PBCCH block and specified in 3GPP TS 05.02 and 3GPP TS 04.08.

NOTE 7: The net bit rate for these channels in a cell can change dynamically and depends on how PDCH are configured in a cell, and upon the parameters BS_PBCCH_BLKS, BS_PAG_BLKS_RES and BS_PRACH_BLKS broadcast on the PBCCH and specified in 3GPP TS 05.02 and 3GPP TS 04.08, as well as upon how certain blocks on the PDCH are used (indicated by the message type).

NOTE 8: For adaptive half rate speech, the blocks are divided into two classes according to the importance of the bits (the first number in the block length corresponds to the class I bits, the second number corresponds to the class II bits).

NOTE 9: CTSBCH, CTSARCH, CTSPCH and CTSAGCH are only used in CTS.

NOTE 10: For EGPRS PDTCH, the block length in bits excludes the USF bits (downlink traffic) and all the error-check bits.