B.2 EGPRS RLC/MAC data block header

3GPP43.051GSM/EDGE Overall descriptionRelease 17Stage 2TS

B.2.1 Downlink RLC/MAC data block header

The EGPRS combined downlink RLC/MAC header for MCS‑7, MCS‑8 and MCS‑9 (header type  1) is formatted according to figure B.3.

Bit
8	7	6	5	4	3	2	1
TFI	RRBP		ES/P		USF
BSN1		PR		TFI
BSN1
BSN2							BSN1
CPS					BSN2

Figure B.3: Downlink RLC Data Block Header for MCS-7, MCS-8 and MCS-9

The EGPRS combined downlink RLC/MAC header for MCS-5 and MCS-6 (header type 2) is formatted according to figure B.4.

Bit
8	7	6	5	4	3	2	1
TFI	RRBP		ES/P		USF
BSN1		PR		TFI
BSN1
				CPS			BSN1

Figure B.4: Downlink RLC Data Block Header for MCS-5 and MCS-6

The EGPRS combined downlink RLC/MAC header for MCS-1, MCS-2, MCS-3 and MCS-4 (header type 3) is formatted according to figure B.5.

Bit
8	7	6	5	4	3	2	1
TFI	RRBP		ES/P		USF
BSN1		PR		TFI
BSN1
	SPB		CPS				BSN1

Figure B.5: Downlink RLC Data Block Header for MCS-1, MCS-2, MCS-3 and MCS-4

B.2.2 Uplink RLC/MAC data block header

The EGPRS combined uplink RLC/MAC header for MCS-7, MCS-8 and MCS-9 (header type 1) is formatted according to figure B.6.

Bit
8	7	6	5	4	3	2	1
TFI		Countdown Value				SI	R
BSN1					TFI
BSN2		BSN1
BSN2
Spare		RSB	CPS
		Spare

Figure B.6: Uplink RLC Data Block Header for MCS-7, MCS-8 and MCS-9

The EGPRS combined uplink RLC/MAC header for MCS-5 and MCS-6 (header type 2) is formated according to figure B.7.

Bit
8	7	6	5		4	3	2	1
TFI		Countdown Value					SI	R
BSN1						TFI
CPS		BSN1
Spare								CPS
				Spare

Figure B.7: Uplink RLC Data Block Header for MCS-5 and MCS-6

The EGPRS combined uplink RLC/MAC header for MCS-1, MCS-2, MCS-3 and MCS-4 (header type 3) is formatted according to figure B.8.

Bit
8	7		6	5		4		3	2		1
TFI			Countdown Value						SI		R
BSN1								TFI
CPS			BSN1
		Spare			RSB		SPB			CPS

Figure B.8: Uplink RLC Data Block Header for MCS-1, MCS-2, MCS-3 and MCS-4