2.4 Location Data Forward Messages

The following types of Location Data Forward Messages are included in the MUP and are each identified by a different heading code H1:

2.4.1 Location Updating Message (LUM)

2.4.2 Location Cancellation Message (LCM)

2.4.3 Supplementary Updating Message (SUM)

 

2.4.1 Location Updating Message (LUM)

Basic format:

e

d

c

b

a

L............BA

H..........BA

D.....BA

D.....BA

fe..........BA

MTXV IDENTITY Id1Id2Id3.

MTXV RESTRICTIONS

HEADING CODE H1

HEADING CODE H0

TRANSACTION NUMBER

12

8

4

4

32

k

j

i

h

g

f

H.......BA

P.....BA

D.......BA

D..........BA

.............BA

D.......BA

OPERATOR INDICATOR Y3

PREPAID CALL UNITS

TRAFFIC AREA INDICATOR Y2

INFORMATION FIELD IND. SET NO.1

MOBILE STATION IDENTITY ZX1...X6(K1K2K3)

NUMBER OF DIGITS

0/8

Optional

0/16 Optional

4

4

n * 8 4<n<5

4

 

Figure 2.4.1 Location Updating Message.

 

The following codes are used:

a) Transaction number.

See paragraph 2.2.

b) Heading code H0 is coded 0001.

c) Heading code H1 is coded 0001.

 

d) MTXV restrictions.

Bit A: Added Mobile Identity Security.

0 Not required.

1 Added Security is required.

Bit B: Verified Roaming Updating

0 Set the new location

1 Do not set the new location

Bit C: SIS verified Roaming Updating

0 Ordinary Location Updating

1 Location Updating verified with SIS

Bit HGFED:

Spare

e) MTXV Identity (Id1Id2Id3)

The MTXV identity is used for routing information when the NMT-node is returning acknowledge messages to a originating node. The identity is also used for location of a roaming subscribers home node. The digits are coded as in 2.4.1.g.

f) Number of digits

A code expressing in pure binary representation the number of digits contained in the following subfield.

g) Mobile Station Identity (ZX1...X6K1K2K3) or (ZX1...X6).

The MS Identity will either consist of 10 digits (including
K1K2K3), or only 7 digits (K1K2K3 not included). If the MS Identity consists of only 7 digits, no checking of K1K2K3 should be performed.

 

Coding:

The digit signals are coded as shown below. The most significant digit is sent first. Subsequent digits are sent in successive 4-bit fields.
 

0000

Digit 0

1000

Digit 8
 

0001

Digit 1

1001

Digit 9
 

0010

Digit 2

1010

Code 10
 

0011

Digit 3

1011

Code 11
 

0100

Digit 4

1100

Code 12
 

0101

Digit 5

1101

Code 13
 

0110

Digit 6

1110

Code 14
 

0111

Digit 7

1111

Code 15

Filler

h) Information Field Indicator Set no 1

0 Field not included/ valid.

1 Field included/ valid.

Bit A: Indicator for the Traffic Area Indicator field Y2.

Bit B: Reserved for indicator for a second set of Information fields.

Bit C: Indicator for the Prepaid Call Units field.

Bit D: Indicator for the Operator Indicator field Y3.

 

i) Traffic Area Indicator Y2

The value of Traffic Area (Y2) are coded as below.

Bit DCBA:
 

0000

Y2 Value 0

1000

Y2 Value 8
 

0001

Y2 Value 1

1001

Y2 Value 9
 

0010

Y2 Value 2

1010

Y2 Value A
 

0011

Y2 Value 3

1011

Y2 Value B
 

0100

Y2 Value 4

1100

Y2 Value C
 

0101

Y2 Value 5

1101

Y2 Value D
 

0110

Y2 Value 6

1110

Y2 Value E
 

0111

Y2 Value 7

1111

Y2 Value F

j) Prepaid Call Units

The field indicates the amount of the Prepaid Call Units the subscriber has used in the previous call. If the field is empty (= zero value) the LUM message is an ordinary location updating message. Coding of the units as in field 2.4.1.g

k) Operator Indicator Y3

The digits in the Traffic Area (Y3) are binary coded 0 - 255. The least significant digit is sent first.

Example: Coding of «3»

Bit HGFEDCBA

00000011

 

2.4.2 Location Cancellation Message (LCM)

Basic format:

f

e

d

c

b

a

H.......BA

D.......BA

D.....BA

D.....BA

D.....BA

fe.........BA

MOBILE STATION IDENTITY

NUMBER OF DIGITS

SPARE

HEADING CODE H1

HEADING CODE H0

TRANSACTION NUMBER

n*8

4

4

4

4

32

4<n<5

h

g

D.....BA

LK......BA

SPARE

MTXV IDENTITY

4

12

Figure 2.4.2 Location Cancellation Message

The following codes are used:

a) Transaction number.

See paragraph 2.2.

b) Heading code H0 is coded 0001.

c) Heading code H1 is coded 0010.

d) Spare.

e) Number of digits.

See paragraph 2.4.1.f.

f) Mobile Station Identity.

See paragraph 2.4.1.g.

g) MTXV Identity

See paragraph 2.4.1.e.

h) Spare

2.4.3 Supplementary Updating Message (SUM)

Basic format:

f

e

d

c

b

a

H.......BA

D............BA

D.......BA

D.....BA

D.....BA

fe.........BA

MOBILE STATION IDENTITY

MOBILE STATION RELATED FORWARDING INFORMATION

NUMBER OF DIGITS

HEADING CODE H1

HEADING CODE H0

TRANSACTION NUMBER

n*8

4

4

4

4

32

4<n<5

  

Figure 2.4.3 Supplementary Updating Message

The following codes are used:

a) Transaction number.

See paragraph 2.2.

b) Heading code H0 is coded 0001.

c) Heading code H1 is coded 0011.

d) Number of digits.

See paragraph 2.4.1.f.

e) Mobile station related Forwarding Information

Bit A: Message Waiting reset information

0: Not reset of Message waiting indicator.

1: Reset of Message waiting indicator.

Bit B: Attach/ Detach Information

0: Mobile station considered attached to network.

1: Mobile station considered detached from network.

Bit DC: Spare

f) Mobile Station Identity.

See paragraph 2.4.1.g.