The purpose of the Segmented message information element is to indicate that the transmission in which it appears is part of a segmented message, in addition to the use of message type SEGMENT.When included in a message segment, it appears directly after the Message type information element (see Annex H).
The Segmented message information element is coded as shown in Figure 4-32 and Table 4-23.
The length of this information element is four octets.
Bits |
||||||||
8 |
7 |
6 |
5 |
4 |
3 |
2 |
1 |
Octets |
Segmented message Information element identifier |
||||||||
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
1 |
Length of segmented message contents |
2 |
|||||||
First segment indicator |
Number of segments remaining |
3 |
||||||
0 |
Segmented message type |
4 |
||||||
Segmented message information element
Segmented message information element
First segment indicator (octet 3) |
|
Bit |
|
8 |
|
0 |
Subsequent segment to first segment |
1 |
First segment of segmented message |
Number of segments remaining (octet 3) |
|
Binary number indicating the number of remaining segments within the message to be sent. |
|
Segmented message type (octet 4) |
|
Type of message being segmented coded as per 4.4. |
|
Note - Bit 8 is reserved for possible future use as an extension bit. |
|