7.7.0A Information Element with an IE Type Extension field
29.0603GPPGeneral Packet Radio Service (GPRS)GPRS Tunnelling Protocol (GTP) across the Gn and Gp interfaceRelease 17TS
Figure 7.7.0A-1 depicts the format of an information element with IE type extension field.
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Bits |
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Octets |
8 |
7 |
6 |
5 |
4 |
3 |
2 |
1 |
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1 |
Type = 238 (Decimal) |
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2-3 |
Length=n |
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4-5 |
IE Type Extension |
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6-n+3 |
IE specific data or content of a group IE |
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Figure 7.7.0A-1: Information Element with an IE Type Extension field
The IE Type in octet 1 of an information element with an IE Type Extension field shall be set to 238. Such IE shall be further identified by the value encoded in the IE Type Extension field in octets 4 and 5.
The value of the IE Type Extension shall be encoded in full hexadecimal representation (binary, not ASCII encoding) from 256 up to 65535. This field indicates the type of the Information Element and the valid values of the IE type Extension field are defined in clause 7.7.0.
The Length field shall contain the length of the information element excluding the Type and Length field, but not the IE Type Extension field.