7 Coding and interleaving

3GPP45.001General descriptionGSM/EDGE Physical layer on the radio pathRelease 17TS

7.1 General

A brief description of the coding schemes that are used for the logical channels mentioned in clause 2, except packet traffic channels and packet control channels that can be found in sub clause 7.2, plus the synchronization channels (see subclause 5.2), is made in the following tables. For all the types of channels the following operations are made in this order:

– external coding (block coding);

– internal coding (convolutional or turbo coding);

– interleaving.

After coding, the different channels (except RACH, EC-RACH, SCH, EC-SCH, CTSBCH-SB and CTSARCH) are constituted by blocks of coded information bits plus coded header (the purpose of the header is to distinguish between TCH and FACCH blocks). These blocks are interleaved over a number of bursts. The block size and interleaving depth are channel dependent. All these operations are specified in 3GPP TS 45.003.

For the adaptive speech traffic channels, a signaling codeword is attached to the block of coded information bits before interleaving. The signaling codeword is a block code representation of a 2-bits inband information word (rate ¼ for the adaptive full rate speech traffic channels, ½ for the adaptive half rate speech traffic channels, rate 1/6 for the adaptive half rate 8-PSK speech and 8-PSK wideband speech traffic channels, and rate 1/12 for the adaptive full rate 8-PSK wideband speech traffic channels).

Type of channel	bits/block data+parity+tail1	convolutional code rate	coded bits per block	interleaving depth
TCH/FS			456	8
class I2	182 + 3 + 4	½	378
class II	78 + 0 + 0	‑	78
TCH/EFS			456	8
class I2	170 + 15 + 4	½	378
class II	74 + 4 + 0	‑	78
TCH/HS			228	4
class I3	95+3+6	104/211	211
class II	17+0+0		17
TCH/AFS12.24			456	8
Class I5	244 + 6 + 4	127/224	448
TCH/AFS10.24			456	8
Class I6	204 + 6 + 4	107/224	448
TCH/AFS7.954			456	8
Class I7	159 + 6 + 6	171/448	448
TCH/AFS7.44			456	8
Class I8	148 + 6 + 4	79/224	448
TCH/AFS6.74			456	8
Class I9	134 + 6 + 4	9/28	448
TCH/AFS5.94			456	8
Class I10	118 + 6 + 6	65/224	448
TCH/AFS5.154			456	8
Class I11	103 + 6 + 4	113/448	448
TCH/AFS4.754			456	8
Class I12	95 + 6 + 6	107/448	448
TCH/AHS7.9513			228	4
Class I14	123 + 6 + 4	133/188	188
Class II	36+0+0		36
TCH/AHS7.413			228	4
Class I15	120 + 6 + 4	65/98	196
Class II	28+0+0		28
TCH/AHS6.713			228	4
Class I16	110 + 6 + 4	3/5	200
Class II	24+0+0		24
TCH/AHS5.913			228	4
Class I17	102 + 6 + 4	7/13	208
Class II	16+0+0		16
TCH/AHS5.1513			228	4
Class I18	91 + 6 + 4	101/212	212
Class II	12+0+0		12
TCH/AHS4.7513			228	4
Class I19	83 + 6 + 6	95/212	212
Class II	12+0+0		12
(continued)

(continued)
Type of channel	bits/block data+parity+tail1	convolutional code rate	coded bits per block	interleaving depth
TCH/WFS12.654			456	8
Class I23	253 + 6 + 4	263/448	448
TCH/WFS8.854			456	8
Class I24	177 + 6 + 4	187/448	448
TCH/WFS6.64			456	8
Class I25	132 + 8 + 4	9/28	448
O-TCH/WFS23.8527			1368	8
Class I23	477 + 6 + 6	163/448	1344
O-TCH/WFS15.8527			1368	8
Class I23	317 + 6 + 6	47/192	1344
O-TCH/WFS12.6527			1368	8
Class I23	253 + 6 + 6	14/71	1344
O-TCH/WFS8.8527			1368	8
Class I24	177 + 6 + 6	9/64	1344
O-TCH/WFS6.627			1368	8
Class I28	132 + 6 + 6	3/28	1344
O-TCH/WHS12.6526			684	4
Class I23	253 + 6 + 6	265/672	672
O-TCH/WHS8.8526			684	4
Class I24	177 + 6 + 6	9/32	672
O-TCH/WHS6.626			684	4
Class I28	132 + 6 + 6	3/14	672
O-TCH/AHS12.226			684	4
Class I5	244 + 6 + 6	8/21	672
O-TCH/AHS10.226			684	4
Class I6	204 + 6 + 6	9/28	672
O-TCH/AHS7.9526			684	4
Class I7	159 + 6 + 6	57/224	672
O-TCH/AHS7.426			684	4
Class I8	148 + 6 + 6	5/21	672
O-TCH/AHS6.726			684	4
Class I9	134 + 6 + 6	73/336	672
O-TCH/AHS5.926			684	4
Class I10	118 + 6 + 6	65/336	672
O-TCH/AHS5.1526			684	4
Class I11	103 + 6 + 6	115/672	672
O-TCH/AHS4.7526			684	4
Class I12	95 + 6 + 6	107/672	672
TCH/F14.4 TCH/F9.6	290 + 0 + 4 4*60 + 0 + 4	294/456 244/456	294/456 456	19 19
TCH/F4.8	60 + 0 + 16	1/3	228	19
TCH/H4.8	4*60 + 0 + 4	244/456	456	19
TCH/F2.4	72 + 0 + 4	1/6	456	8
TCH/H2.4	72 + 0 + 4	1/3	228	19
(continued)

(continued)
Type of channel	bits/block data+parity+tail1	convolutional code rate	coded bits per block	interleaving depth
FACCH/F	184 + 40 + 4	½	456	8
E-FACCH/F	184 + 40 + 4	½	456	4
FACCH/H	184 + 40 + 4	½	456	6
O-FACCH/F	184 + 40 + 6	1/6	1368	8
O-FACCH/H	184 + 40 + 6	1/6	1368	6
SDCCHs, SACCHs20, BCCH, EC-BCCH, NCH, AGCH, PCH, CBCH	184 + 40 + 4	½	456	4
EC-AGCH, EC-PCH	88+18+0	106/116	116	1
EC-PICH31	88+18+0	106/116	116	1
EC-PACCH, downlink	80+18+0	98/114	114	1
EC-PACCH, uplink30	64+18+0	82/116	116	1
EC-PACCH/48, uplink	56+18+0	74/106	106	1
SACCH/TP SACCH/MP	184 + 18 + 6 + 4021	½	456	4
E-IACCH	3	1/822	24	4
EPCCH	3	¼22	12	1
RACH EC-RACH (CC1 to CC4)	8 + 6 + 4 11 + 6 + 4	½ ½	36 36	1 1
EC-RACH (CC5), ESAB	11 + 6	1/6	102	1
EC-RACH (CC5), EDAB	11 + 6 + 4	½	30	1
EC-SCH29	30 + 10 + 4	½	78	1
SCH	25 + 10 + 4	½	78	1
CTSBCH-SB	25 + 10 + 4	½	78	1
CTSPCH	184 + 40 + 4	½	456	4
CTSARCH	25 + 10 + 4	½	78	1
CTSAGCH	184 + 40 + 4	½	456	4
NOTE 1: The tail bits mentioned here are the tail bits of the convolutional code.
NOTE 2: The 3 parity bits for TCH/FS detect an error on 50 bits of class I.
NOTE 3: The 3 parity bits for TCH/HS detect an error on 22 bits of class I.
NOTE 4: For TCH/AFS and TCH/WFS an 8 bits in band signalling codeword is attached to the block of coded information before interleaving. A dedicated block structure to carry the comfort noise information associated with the adaptive full rate speech traffic channels is also specified in 3GPP TS 45.003.
NOTE 5: The 6 parity bits for TCH/AFS12.2 and O-TCH/AHS12.2 detect an error on 81 bits of class I.
NOTE 6: The 6 parity bits for TCH/AFS10.2 and O-TCH/AHS10.2 detect an error on 65 bits of class I.
NOTE 7: The 6 parity bits for TCH/AFS7.95 and O-TCH/AHS7.95 detect an error on 75 bits of class I.
NOTE 8: The 6 parity bits for TCH/AFS7.4 and O-TCH/AHS7.4 detect an error on 61 bits of class I.
NOTE 9: The 6 parity bits for TCH/AFS6.7 and O-TCH/AHS6.7 detect an error on 55 bits of class I.
NOTE 10: The 6 parity bits for TCH/AFS5.9 and O-TCH/AHS5.9 detect an error on 55 bits of class I.
NOTE 11: The 6 parity bits for TCH/AFS5.15 and O-TCH/AHS5.15 detect an error on 49 bits of class I.
NOTE 12: The 6 parity bits for TCH/AFS4.75 and O-TCH/AHS4.75 detect an error on 39 bits of class I.
NOTE 13: For TCH/AHS a 4 bits in band signalling codeword is attached to the block of coded information before interleaving A dedicated block structure to carry the comfort noise information associated with the adaptive half rate speech traffic channels is also specified in 3GPP TS 45.003.
NOTE 14: The 6 parity bits for TCH/AHS7.95 detect an error on 67 bits of class I.
NOTE 15: The 6 parity bits for TCH/AHS7.4 detect an error on 61 bits of class I.
NOTE 16: The 6 parity bits for TCH/AHS6.7 detect an error on 55 bits of class I.
NOTE 17: The 6 parity bits for TCH/AHS5.9 detect an error on 55 bits of class I.
NOTE 18: The 6 parity bits for TCH/AHS5.15 detect an error on 49 bits of class I.
NOTE 19: The 6 parity bits for TCH/AHS4.75 detect an error on 39 bits of class I.
NOTE 20: with the exception of SACCH/TP and SACCH/MP
NOTE 21: 40 uncoded dummy bits are inserted for the mapping of the enhanced power control signalling
NOTE 22: block code is applied
NOTE 23: The 6 parity bits for TCH/WFS12.65, O-TCH/WFS23.85, O-TCH/WFS15.85, O-TCH/WFS12.65 and O-TCH/WHS12.65 detect an error on 72 bits of class I.
NOTE 24: The 6 parity bits for TCH/WFS8.85, O-TCH/WFS8.85 and O-TCH/WHS8.85 detect an error on 64 bits of class I.
NOTE 25: The 8 parity bits for TCH/WFS6.60 detect an error on 54 bits of class I.
NOTE 27: For O-TCH/WFS a 24 bits in band signalling codeword is attached to the block of coded information before interleaving. A dedicated block structure to carry the comfort noise information associated with the adaptive full rate 8PSK wideband speech traffic channels is also specified in 3GPP TS 45.003.
NOTE 28: The 6 parity bits for O-TCH/WFS6.6 and O-TCH/WHS6.6 detect an error on 54 bits of class I. NOTE 29: Two additional information bits available to the physical layer are encoded as a cyclic shift of the mapping of the burst on the physical channel as specified in in 3GPP TS 45.003. NOTE 30: Applies for EC-PACCH/U except EC-PACCH/U/48 using 2 or 4 consecutive PDTCHs. NOTE 31: For EC-PICH, CC3 and EC-PICH, CC4 the EC-CCCH/D coding scheme is used.

Type of channel	bits/block data+parity+tail1	Reed-Solomon code rate	convolutional code rate	coded bits per block	interleaving depth
E-TCH/F43.2 E-TCH/F32.0 E-TCH/F28.8	870 + 0 + 6 640 + 0 + 6 580 + 0 + 6	N/A N/A 73/85	876/1368 646/1392 686/1368	1368 1392 1368	19 12 19

7.2 Packet Traffic and Control Channels

All packet traffic and control channels, except PRACH and EC-PACCH, use rectangular interleaving of one Radio Block over four bursts in consecutive TDMA frames of one PDCH. As an exception, in RTTI configuration, the PDTCH uses rectangular interleaving of one Radio Block over four bursts in two consecutive TDMA frames of a PDCH-pair.

7.2.1 Channel coding for PDTCH

7.2.1.1 Channel coding for GPRS PDTCH

Four different coding schemes, CS-1 to CS-4, are defined for the GPRS Radio Blocks carrying RLC data blocks. For the Radio Blocks carrying RLC/MAC Control blocks code CS-1 is always used. The exceptions are messages that use the existing Access Burst (see 3GPP TS 45.003, e.g. Packet Channel Request). An additional coding scheme is defined for the Access Burst that includes 11 information bits.

The first step of the coding procedure is to add a Block Check Sequence (BCS) for error detection. For CS-1 – CS-3, the second step consists of pre-coding USF (except for CS-1), adding four tail bits and a convolutional coding for error correction that is punctured to give the desired coding rate. For CS-4 there is no coding for error correction.

The details of the codes are shown in the table below, including:

– the length of each field;

– the number of coded bits (after adding tail bits and convolutional coding);

– the number of punctured bits;

– the data rate, including the RLC header and RLC information.

Scheme	Code rate	USF	Pre-coded USF	Radio Block excl. USF and BCS	BCS	Tail	Coded bits	Punctured bits
CS-1	½	3	3	181	40	4	456	0
CS-2	»2/3	3	6	268	16	4	588	132
CS-3	»3/4	3	6	312	16	4	676	220
CS-4	1	3	12	428	16	–	456	–

CS-1 is the same coding scheme as specified for SDCCH. It consists of a half rate convolutional code for FEC and a 40 bit FIRE code for BCS (and optionally FEC). CS-2 and CS-3 are punctured versions of the same half rate convolutional code as CS-1 for FEC. CS-4 has no FEC.

The USF has 8 states, which are represented by a binary 3 bit field in the MAC Header.

All coding schemes are mandatory for MSs supporting GPRS. Only CS-1 is mandatory for the network.

7.2.1.2 Channel coding for EGPRS and EGPRS2 PDTCH

Nine different modulation and coding schemes, MCS-1 to MCS-9, are defined for the EGPRS Radio Blocks (4 bursts, 20ms in case of BTTI configuration or 10ms in case of RTTI configuration) carrying RLC data blocks. Further, 16 more modulation and coding schemes, DAS-5 to DAS-12 and DBS-5 to DBS-12, are defined for EGPRS2 downlink radio blocks (4 bursts, 20ms in case of BTTI configuration or 10ms in case of RTTI configuration) carrying RLC data blocks and 13 more modulation and coding schemes, UAS-7 to UAS-11 and UBS-5 to UBS-12, are defined for EGPRS2 uplink radio blocks (4 bursts, 20ms in case of BTTI configuration or 10ms in case of RTTI configuration) carrying RLC data blocks. For the Radio Blocks carrying RLC/MAC Control blocks code CS-1 is always used, except in the case of RTTI configuration, when code MCS-0 may be used in the downlink (see subclause 7.2.2). The exceptions are messages that use the existing Access Burst (see 3GPP TS 45.003, e.g. Packet Channel Request). An additional coding scheme is defined for the Access Burst that includes 11 information bits.

To ensure strong header protection, the header part of the Radio Block is independently coded from the data part of the Radio Block (8 bit CRC calculated over the header -excl. USF- for error detection, followed by rate 1/3 convolutional coding – and possibly puncturing – for error correction). Additionally, for transmission using FANR, a PAN field is included which is independently coded from the header and data parts of the Radio Block (the coding is the same as for the header part).

For EGPRS (see 3GPP TS 44.060), the MCSs are divided into different families A, B and C. Each family has a different basic unit of payload (see 3GPP TS  43.064). Different code rates within a family are achieved by transmitting a different number of payload units within one Radio Block. For families A and B, 1, 2 or 4 payload units are transmitted, for family C, only 1 or 2 payload units are transmitted.

For EGPRS2 (see 3GPP TS 44.060), the coding schemes are divided into different families A, B and C. Each family has a different basic unit of payload (see 3GPP TS 43.064). Different code rates within a family are achieved by transmitting a different number of payload units within one Radio Block. For family A, 1, 2, 4, 6 or 8 payload units are transmitted, for family B, 1, 2, 3, 4, 6 or 9 payload units are transmitted, for family C, only 1 or 2 payload units are transmitted.

For EGPRS, when 4 payload units are transmitted (MCS-7, MCS-8 and MCS-9), these are splitted into two separate RLC blocks (i.e. with separate sequence numbers and block check sequences).

For EGPRS2, when 4 payload units are transmitted (UAS-7 to UAS-9, UBS-7, UBS-8, DAS-8, DAS-9, DBS-7 and DBS-8), these are split into two separate RLC blocks (i.e. with separate sequence numbers and block check sequences). When 6 payload units are transmitted (UAS-10, UAS-11, UBS-9, UBS-10, DAS-10, DAS-11, DBS-9 and DBS-10), these are split into three separate RLC blocks (i.e. with separate sequence numbers and block check sequences), except for DAS-10 for which they are split into two separate RLC blocks. When 8 payload units are transmitted (DBS-11, DBS-12, UBS-11 and UBS-12), these are split into four separate RLC blocks (i.e. with separate sequence numbers and block check sequences). When 9 payload units are transmitted (DAS-12), these are split into three separate RLC blocks (i.e. with separate sequence numbers and block check sequences).

The first step of the coding procedure is to add a Block Check Sequence (BCS) for error detection.

In case of convolutional coding, the second step consists of adding six tail bits (TB) and a 1/3 rate convolutional coding for error correction that is punctured to give the desired coding rate.

In case of turbo coding, the second step consists of 1/3 rate turbo coding for error correction (see 3GPP TS 45.003) that is punctured to give the desired coding rate.

The USF has 8 states, which are represented by a binary 3 bit field in the MAC Header. The USF is encoded to 12 symbols for bursts using legacy symbol rate and 16 symbols for bursts using higher symbol rate, (this results in12 bits for GMSK modes, 32 bits for QPSK modes, 36 bits for 8PSK modes, 48 bits for 16-QAM modes at legacy symbol rate (See 3GPP TS 45.004), 64 bits for 16-QAM at higher symbol rate (see 3GPP TS 45.004), 60 bits for 32-QAM at legacy symbol rate and 80 bits for 32-QAM at higher symbol rate).

MSs supporting EGPRS shall support MCS-1 to MCS-9 in downlink and MCS-1 to MCS-4 in uplink. In case an MS supporting EGPRS is 8-PSK capable in uplink, it shall also support MCS-5 to MCS-9 in uplink. A network supporting EGPRS may support only some of the MCSs.

MSs supporting EGPRS2 (see 3GPP TS 44.060) shall support EGPRS coding schemes MCS-1 to MCS-9 in downlink and uplink.

MSs supporting EGPRS2-A (see 3GPP TS 44.060) in the downlink shall support DAS-5 to DAS-12.

MSs supporting EGPRS2-B (see 3GPP TS 44.060) in the downlink shall support DAS-5 to DAS-12 and DBS-5 to DBS-12.

MSs supporting EGPRS2-A in the uplink shall support UAS-7 to UAS-11.

MSs supporting EGPRS2-B in the uplink shall support UAS-7 to UAS-11 and UBS-5 to UBS-12.

A network supporting EGPRS2-A in downlink (respectively uplink) may support only some of DAS-5 to DAS-12 (respectively UAS-7 to UAS-11).

A network supporting EGPRS2-B in downlink (respectively uplink) may support only some of DBS-5 to DBS-12 (respectively UBS-5 to UBS-12).

The details of the EGPRS coding schemes are shown in Table 7.2.1.2.1. An exhaustive description of the EGPRS coding schemes can be found in 3GPP TS 45.003.

Table 7.2.1.2.1 – Coding parameters for the EGPRS coding schemes

Scheme	Code rate (Note 2)	Header Code rate	PAN Code rate (if present)	Modulation	RLC blocks per Radio Block (20ms)	Raw Data within one Radio Block (Note 1)	Family	BCS	Tail payload	HCS	PCS (if present)	Data rate kb/s (Note 3)
MCS-9	1,0	0,36	n/a	8PSK	2	2×592	A	2×12	2×6	8	10	59,2
MCS-8	0,92 (0,98)	0,36	0,42		2	2×544	A					54,4
MCS-7	0,76 (0,81)	0,36	0,42		2	2×448	B					44,8
MCS-6	0,49 (0,52)	1/3	0,39		1	592 48+544	A	12	6			29,6 27,2
MCS-5	0,37 (0,40)	1/3	0,39		1	448	B					22,4
MCS-4	1,0	0,53	n/a	GMSK	1	352	C					17,6
MCS-3	0,85 (0,96)	0,53	0,63		1	296 48+248 and 296	A					14,8 13,6
MCS-2	0,66 (0,75)	0,53	0,63		1	224	B					11,2
MCS-1	0,53 (0,60)	0,53	0,63		1	176	C					8,8
Note 1: The italic caption indicates the 6 octets of padding when retransmitting MCS-8 block with MCS-3 or MCS-6. For MCS-3, the 6 octets of padding are sent every second block (see 3GPP TS 44.060). Note 2: The number in bracket indicates the coding rate for transmission using FANR, when the PAN is present. Note 3: These data rates are applicable for BTTI configuration. The data rates are doubled in case of RTTI configuration.

The details of the EGPRS2 coding schemes are shown in the table below. An exhaustive description of the EGPRS2 coding schemes can be found in 3GPP TS 45.003.

Table 7.2.1.2.2: Coding parameters for the EGPRS2 coding schemes

Scheme	Code rate (Note 5)	Header Code rate	PAN code rate (if present)	Modulation	RLC blocks per Radio Block (20ms)	Raw Data within one Radio Block	Family	BCS	Tail payload	HCS	PCS	Data rate kb/s (Note 6)
DAS-12	0,96 (0,99)	0,38	0.38	32QAM (Note 4)	3	658	B	3×12	(Note 7)	8	10	98,4
DAS-11	0,80 (0,83)	038	0.38		3	546	A	3×12	(Note 7)			81,6
DAS-10	0,64 (0,66)	0,33	0.38		2	658	B	2×12	(Note 7)			65,6
DAS-9	0,68 (0,70)	0,34	0.38	16QAM (Note 4)	2	546	A	2×12	(Note 7)			54,4
DAS-8	0,56 (0,58)	0,34	0.38		2	450	B	2×12	(Note 7)			44,8
DAS-7	0,54 (0,57)	033	0.38	8PSK (Note 4)	1	658	B	12	(Note 7)			32,8
DAS-6	0,45 (0,48)	0,33	0.38		1	546	A	12	(Note 7)			27,2
DAS-5	0,37 (0,39)	0,33	0.38		1	450	B	12	(Note 7)			22,4
DBS-12	0,98 (1,00)	0,37	0.54	32QAM (Note 3)	4	594	A	4×12	(Note 7)			118,4
DBS-11	0,91 (0,93)	0,37	0.38		4	546	A	4×12	(Note 7)			108,8
DBS-10	0,72 (0,75)	0,34	0.38		3	594	A	3×12	(Note 7)			88,8
DBS-9	0,71 (0,.73)	0,34	0.38	16QAM (Note 3)	3	450	B	3×12	(Note 7)			67,2
DBS-8	0,60 (0.63)	0,31	0.38		2	594	A	2×12	(Note 7)			59,2
DBS-7	0,47 (0,48)	0,31	0.38		2	450	B	2×12	(Note 7)			44,8
DBS-6	0,63 (069)	0,31	0.38	QPSK (Note 3)	1	594	A	1×12	(Note 7)			29,6
DBS-5	0,49 (0,53)	0,31	0.38		1	450	B	1×12	(Note 7)			22,4
UAS-11	0,95 (0,99)	0,36	0.38	16QAM (Note 2)	3	514	A	3×12	3×6			76,8
UAS-10	0,84 (0,87	0,36	0.38		3	450	B	3×12	3×6			67,2
UAS-9	0,71 (0,74)	0,36	0.38		2	594	A	2×12	2×6			59,2
UAS-8	0,62 (0,64)	0,36	0.38		2	514	A	2×12	2×6			51,2
UAS-7	0,55 (0,57)	0,36	0.38		2	450	B	2×12	2×6			44,8
UBS-12	0,96 (0,99)	0,35	0.38	32QAM (Note 1)	4	594	A	4×12	4×6			118,4
UBS-11	0,89 (0,91)	0,35	0.38		4	546	A	4×12	4×6			108,8
UBS-10	0,71 (0,73)	0,35	0.36		3	594	A	3×12	3×6			88,8
UBS-9	0,70 (0,72)	0,32	0.36	16QAM (Note 1)	3	450	B	3×12	3×6			67,2
UBS-8	0,60 (0,61)	0,33	0.38		2	594	A	2×12	2×6			59,2
UBS-7	0,46 (0,47)	0,33	0.38		2	450	B	2×12	2×6			44,8
UBS-6	0,62 (0,67)	0,35	0.38	QPSK (Note 1)	1	594	A	12	6			29,6
UBS-5	0,47 (0,51)	0,35	0.38		1	450	B	12	6			22,4
Note 1: These coding schemes use the higher symbol rate (See 3GPP TS 45.004) and are only available in the uplink Note 2: These coding schemes use the normal symbol rate (See 3GPP TS 45.004) and are only available in the uplink Note 3: These coding schemes use the higher symbol rate (See 3GPP TS 45.004) and are only available in the downlink Note 4: These coding schemes use the normal symbol rate (See 3GPP TS 45.004) and are only available in the downlink Note 5: The number in bracket indicates the code rate for transmission using FANR, when the PAN is present Note 6: These data rates apply in case of BTTI configuration, the data rates are doubled in case of RTTI configuration. Note 7: The turbo code is terminated using 2×3 tail bits resulting in 12 coded bits per RLC block.

7.2.2 Channel coding for PACCH, PBCCH, PAGCH, PPCH, CPBCCH, CPAGCH, CPPCH, and CSCH

The channel coding for the PBCCH, PAGCH, PPCH, CPBCCH, CPAGCH, and CPPCH corresponds to the coding scheme CS-1. The channel coding for the PACCH corresponds to the coding scheme CS-1; in case of RTTI configuration, the channel coding for the downlink PACCH corresponds to the coding scheme MCS-0 if BTTI USF mode is used and may correspond to either CS-1 or MCS-0 if RTTI USF mode is used. The channel coding for the CSCH is identical to SCH.

7.2.3 Channel Coding for the PRACH and MPRACH

Two types of packet random access burst may be transmitted on the PRACH and MPRACH: an 8 information bits random access burst or an 11 information bits random access burst called the extended packet random access burst. The MS shall support both random access bursts. The channel coding used for the burst carrying the 8 data bit packet random access uplink message is identical to the coding of the random access burst on the RACH. The channel coding used for the burst carrying the 11 data bit packet random access uplink message is a punctured version of the coding of the random access burst on the RACH.

7.2.4 Channel coding for EC-PDTCH, EC-PACCH, EC-AGCH, EC-PCH, EC-PICH, EC-BCCH and EC-SCH

The channel coding for the EC-BCCH corresponds to the coding scheme CS-1. EC-SCH, EC-PACCH, EC-AGCH, EC-PICH and EC-PCH are all defined by separate coding schemes, see 3GPP TS 45.003. The channel coding for the EC-PDTCH for coverage classes CC1 to CC4 is identical to PDTCH for EGPRS, see subclause 7.2.1.2, except for a limitation in puncturing schemes used for MCS-1 to MCS-4. The channel coding for the EC-PDTCH for uplink coverage class CC5 is defined by a separate coding scheme MCS-1′ see 3GPP TS 45.003 [14].

7.2.5 Channel Coding for EC-RACH

For EC-RACH CC1 to CC4, the access burst is used and the coding is identical to the coding for PRACH. For EC-RACH CC5, either the extended synchronization access burst (ESAB) is used, where 11 information bits are encoded to 102 bits with 1/6 coding rate or the extended dual slot access burst (EDAB), where 11 information bits are encoded to 30 bits with 1/2 coding rate see 3GPP TS 45.003 [14].