B.4 Character Groups

23.0423GPPCompression algorithm for text messaging servicesRelease 17TS

Tools: ARFCN - Frequency Conversion for 5G NR/LTE/UMTS/GSM

Character Group ID 0 (decimal)

This Character Group ID has the special meaning that no Character Group is defined (or therefore enabled) and the value of bit 0 of octet 1 of the CH is always to be interpreted as zero.

Character Group ID 1 (decimal)

The Character Group is rendered in Character Set ID 2 (decimal) = Code Page 437.

The Number of Groups value is 3.

There are 2 Group Transition symbols used these have the decimal values 259 and 260. Their use in signalling transitions between the 3 groups are shown in the table B.3.

Table B.3: Character Group ID 1 (decimal)

	New Group
Current Group	0	1	2
0		260	259
1	260		259
2	260	259

The fold tables and Group Membership bit flags are set out in the following table B.4.

Table B.4: fold tables and Group Membership bit flags

Char	Value	Group 0 Fold Table	Group 1 Fold Table	Group 2 Fold Table	Group 2 Member	Group 1 Member	Group 0 Member
	012	034	012	012	1	0	0
<SP>	032	032	032	032	1	1	1
!	033	118	033	033	1	0	0
"	034	034	034	012	0	1	1
#	035	102	035	035	1	0	0
%	037	113	037	037	1	0	0
&	038	111	038	038	1	0	0
‘	039	039	039	039	1	1	1
(	040	116	040	040	1	0	0
)	041	117	041	041	1	0	0
*	042	110	042	042	1	0	0
+	043	119	043	043	1	0	0
,	044	044	044	062	0	1	1
–	045	120	045	045	1	0	0
.	046	046	046	046	1	1	1
/	047	114	047	047	1	0	0
0	048	101	048	048	1	0	0
1	049	097	049	049	1	0	0
2	050	105	050	050	1	0	0
3	051	099	051	051	1	0	0
4	052	112	052	052	1	0	0
5	053	100	053	053	1	0	0
6	054	107	054	054	1	0	0
7	055	104	055	055	1	0	0
8	056	103	056	056	1	0	0
9	057	109	057	057	1	0	0
:	058	098	058	058	1	0	0
;	059	106	059	059	1	0	0
<	060	122	060	060	1	0	0
=	061	121	061	061	1	0	0
>	062	044	062	062	1	0	0
?	063	063	063	093	0	1	1
A	065	097	065	065	0	1	0
B	066	098	066	066	0	1	0
C	067	099	067	067	0	1	0
D	068	100	068	068	0	1	0
E	069	101	069	069	0	1	0
F	070	102	070	070	0	1	0
G	071	103	071	071	0	1	0
H	072	104	072	072	0	1	0
I	073	105	073	073	0	1	0
J	074	106	074	074	0	1	0
K	075	107	075	075	0	1	0
L	076	108	076	076	0	1	0
M	077	109	077	077	0	1	0
N	078	110	078	078	0	1	0
O	079	111	079	079	0	1	0
P	080	112	080	080	0	1	0
Q	081	113	081	081	0	1	0
R	082	114	082	082	0	1	0
S	083	115	083	083	0	1	0
T	084	116	084	084	0	1	0
U	085	117	085	085	0	1	0
V	086	118	086	086	0	1	0
W	087	119	087	087	0	1	0
X	088	120	088	088	0	1	0
Y	089	121	089	089	0	1	0
Z	090	122	090	090	0	1	0
[	091	108	091	091	1	0	0
]	093	063	093	093	1	0	0
a	097	097	065	049	0	0	1
b	098	098	066	058	0	0	1
c	099	099	067	051	0	0	1
d	100	100	068	053	0	0	1
e	101	101	069	048	0	0	1
f	102	102	070	035	0	0	1
g	103	103	071	056	0	0	1
h	104	104	072	055	0	0	1
i	105	105	073	050	0	0	1
j	106	106	074	059	0	0	1
k	107	107	075	054	0	0	1
l	108	108	076	091	0	0	1
m	109	109	077	057	0	0	1
n	110	110	078	042	0	0	1
o	111	111	079	038	0	0	1
p	112	112	080	052	0	0	1
q	113	113	081	037	0	0	1
r	114	114	082	047	0	0	1
s	115	115	083	156	0	0	1
t	116	116	084	040	0	0	1
u	117	117	085	041	0	0	1
v	118	118	086	033	0	0	1
w	119	119	087	043	0	0	1
x	120	120	088	045	0	0	1
y	121	121	089	061	0	0	1
z	122	122	090	060	0	0	1
£	156	115	156	156	1	0	0

NOTE: The characters "<SP>" are used to represent the "space" character.

Characters with any other value in the range 0 to 255 are not a member of any group and therefore the fold table values will be equal to the character value in all cases.

Character Group ID >1 (decimal)

No other Character Groups are defined and all other values are reserved.