8.1 Information Element Types
29.2743GPP3GPP Evolved Packet System (EPS)Evolved General Packet Radio Service (GPRS) Tunnelling Protocol for Control plane (GTPv2-C)Release 18Stage 3TS
A GTP control plane (signalling) message may contain several information elements. In order to have forward compatible type definitions for the GTPv2 information elements, all of them shall be TLIV (Type, Length, Instance, Value) coded. GTPv2 information element type values are specified in the Table 8.1-1. The last column of this table indicates whether the information element is:
– Fixed Length: the IE has a fixed set of fields, and a fixed number of octets.
– Variable Length: the IE has a fixed set of fields, and has a variable number of octets.
For example, the last octets may be numbered similar to "5 to (n+4)". In this example, if the value of the length field, n, is 0, then the last field is not present.
– Extendable: the IE has a variable number of fields, and has a variable number of octets.
The last fields are typically specified with the statement: "These octet(s) is/are present only if explicitly specified". The legacy receiving entity shall ignore the unknown octets.
In order to improve the efficiency of troubleshooting, it is recommended that the information elements should be arranged in the signalling messages as well as in the grouped IEs, according to the order the information elements are listed in the message definition table or grouped IE definition table in clause 7. However the receiving entity shall be prepared to handle the messages with information elements in any order.
Within information elements, certain fields may be described as spare. These bits shall be transmitted with the value set to 0. To allow for future features, the receiver shall not evaluate these bits. GTPv2-C information elements that have similar semantics in GTPv1-C shall be converted into GTPv1-C format, as specified in TS 29.060 [4], before sending them to a pre-R8 GSN.
Table 8.1-1: Information Element types for GTPv2
|
IE Type value (Decimal) |
Information elements |
Comment / Reference |
Number of Fixed Octets |
|---|---|---|---|
|
0 |
Reserved |
||
|
1 |
International Mobile Subscriber Identity (IMSI) |
Variable Length / 8.3 |
Not Applicable |
|
2 |
Cause |
Variable Length / 8.4 |
Not Applicable |
|
3 |
Recovery (Restart Counter) |
Variable Length / 8.5 |
Not Applicable |
|
4 to 34 |
Reserved for S101 interface |
See 3GPP TS 29.276 [14] |
See 3GPP TS 29.276 [14] |
|
35 to 50 |
Reserved for S121 interface |
See 3GPP TS 29.276 [14] |
See 3GPP TS 29.276 [14] |
|
51 |
STN-SR |
See 3GPP TS 29.280 [15] |
See 3GPP TS 29.280 [15] |
|
56 |
SRVCC Cause |
See 3GPP TS 29.280 [15] |
See 3GPP TS 29.280 [15] |
|
52 to 70 |
Reserved for Sv interface |
See 3GPP TS 29.280 [15] |
See 3GPP TS 29.280 [15] |
|
71 |
Access Point Name (APN) |
Variable Length / 8.6 |
Not Applicable |
|
72 |
Aggregate Maximum Bit Rate (AMBR) |
Fixed Length / 8.7 |
8 |
|
73 |
EPS Bearer ID (EBI) |
Extendable / 8.8 |
1 |
|
74 |
IP Address |
Variable Length / 8.9 |
Not Applicable |
|
75 |
Mobile Equipment Identity (MEI) |
Variable Length / 8.10 |
Not Applicable |
|
76 |
MSISDN |
Variable Length / 8.11 |
Not Applicable |
|
77 |
Indication |
Extendable / 8.12 |
2 |
|
78 |
Protocol Configuration Options (PCO) |
Variable Length / 8.13 |
Not Applicable |
|
79 |
PDN Address Allocation (PAA) |
Variable Length / 8.14 |
Not Applicable |
|
80 |
Bearer Level Quality of Service (Bearer QoS) |
Extendable / 8.15 |
22 |
|
81 |
Flow Quality of Service (Flow QoS) |
Extendable / 8.16 |
21 |
|
82 |
RAT Type |
Extendable / 8.17 |
1 |
|
83 |
Serving Network |
Extendable / 8.18 |
3 |
|
84 |
EPS Bearer Level Traffic Flow Template (Bearer TFT) |
Variable Length / 8.19 |
Not Applicable |
|
85 |
Traffic Aggregation Description (TAD) |
Variable Length / 8.20 |
Not Applicable |
|
86 |
User Location Information (ULI) |
Extendable / 8.21 |
"f+4-4" (See Figure 8.21-1) |
|
87 |
Fully Qualified Tunnel Endpoint Identifier (F-TEID) |
Extendable / 8.22 |
9/21/25 |
|
88 |
TMSI |
Variable Length / 8.23 |
Not Applicable |
|
89 |
Global CN-Id |
Variable Length / 8.24 |
Not Applicable |
|
90 |
S103 PDN Data Forwarding Info (S103PDF) |
Variable Length / 8.25 |
Not Applicable |
|
91 |
S1-U Data Forwarding Info (S1UDF) |
Variable Length/ 8.26 |
Not Applicable |
|
92 |
Delay Value |
Extendable / 8.27 |
1 |
|
93 |
Bearer Context |
Extendable / 8.28 |
Not Applicable |
|
94 |
Charging ID |
Extendable / 8.29 |
4 |
|
95 |
Charging Characteristics |
Extendable / 8.30 |
2 |
|
96 |
Trace Information |
Variable Length / 8.31 |
Not Applicable |
|
97 |
Bearer Flags |
Extendable / 8.32 |
1 |
|
98 |
Reserved |
||
|
99 |
PDN Type |
Extendable / 8.34 |
1 |
|
100 |
Procedure Transaction ID |
Extendable / 8.35 |
1 |
|
101 |
Reserved |
||
|
102 |
Reserved |
||
|
103 |
MM Context (GSM Key and Triplets) |
Extendable / 8.38 |
"r+1-4" (See Figure 8.38-1) |
|
104 |
MM Context (UMTS Key, Used Cipher and Quintuplets) |
Extendable / 8.38 |
"r+1-4" (See Figure 8.38-2) |
|
105 |
MM Context (GSM Key, Used Cipher and Quintuplets) |
Extendable / 8.38 |
"r+1-4" (See Figure 8.38-3) |
|
106 |
MM Context (UMTS Key and Quintuplets) |
Extendable / 8.38 |
"r+1-4" (See Figure 8.38-4) |
|
107 |
MM Context (EPS Security Context, Quadruplets and Quintuplets) |
Extendable / 8.38 |
"s+64-4" (See Figure 8.38-5) |
|
108 |
MM Context (UMTS Key, Quadruplets and Quintuplets) |
Extendable / 8.38 |
"r+1-4" (See Figure 8.38-6) |
|
109 |
PDN Connection |
Extendable / 8.39 |
Not Applicable |
|
110 |
PDU Numbers |
Extendable / 8.40 |
9 |
|
111 |
P-TMSI |
Variable Length / 8.41 |
Not Applicable |
|
112 |
P-TMSI Signature |
Variable Length / 8.42 |
Not Applicable |
|
113 |
Hop Counter |
Extendable / 8.43 |
1 |
|
114 |
UE Time Zone |
Extendable / 8.44 |
2 |
|
115 |
Trace Reference |
Fixed Length / 8.45 |
6 |
|
116 |
Complete Request Message |
Variable Length / 8.46 |
Not Applicable |
|
117 |
GUTI |
Variable Length / 8.47 |
Not Applicable |
|
118 |
F-Container |
Variable Length / 8.48 |
Not Applicable |
|
119 |
F-Cause |
Variable Length / 8.49 |
Not Applicable |
|
120 |
PLMN ID |
Variable Length / 8.50 |
Not Applicable |
|
121 |
Target Identification |
Variable Length / 8.51 |
Not Applicable |
|
122 |
Reserved |
||
|
123 |
Packet Flow ID |
Variable Length / 8.53 |
Not Applicable |
|
124 |
RAB Context |
Fixed Length / 8.54 |
9 |
|
125 |
Source RNC PDCP Context Info |
Variable Length / 8.55 |
Not Applicable |
|
126 |
Port Number |
Extendable / 8.56 |
2 |
|
127 |
APN Restriction |
Extendable / 8.57 |
1 |
|
128 |
Selection Mode |
Extendable / 8.58 |
1 |
|
129 |
Source Identification |
Variable Length / 8.59 |
Not Applicable |
|
130 |
Reserved |
||
|
131 |
Change Reporting Action |
Variable Length / 8.61 |
Not Applicable |
|
132 |
Fully Qualified PDN Connection Set Identifier (FQ-CSID) |
Extendable / 8.62 |
"q+1-4" (See Figure 8.62-1) |
|
133 |
Channel needed |
Variable Length / 8.63 |
Not Applicable |
|
134 |
eMLPP Priority |
Variable Length / 8.64 |
Not Applicable |
|
135 |
Node Type |
Extendable / 8.65 |
1 |
|
136 |
Fully Qualified Domain Name (FQDN) |
Variable Length / 8.66 |
Not Applicable |
|
137 |
Transaction Identifier (TI) |
Variable Length / 8.68 |
Not Applicable |
|
138 |
MBMS Session Duration |
Extendable / 8.69 |
3 |
|
139 |
MBMS Service Area |
Variable Length / 8.70 |
Not Applicable |
|
140 |
MBMS Session Identifier |
Extendable / 8.71 |
1 |
|
141 |
MBMS Flow Identifier |
Extendable / 8.72 |
2 |
|
142 |
MBMS IP Multicast Distribution |
Extendable / 8.73 |
"m+1-4" (See Figure 8.73-1) |
|
143 |
MBMS Distribution Acknowledge |
Extendable / 8.74 |
1 |
|
144 |
RFSP Index |
Fixed Length / 8.77 |
2 |
|
145 |
User CSG Information (UCI) |
Extendable / 8.75 |
8 |
|
146 |
CSG Information Reporting Action |
Extendable / 8.76 |
1 |
|
147 |
CSG ID |
Extendable / 8.78 |
4 |
|
148 |
CSG Membership Indication (CMI) |
Extendable / 8.79 |
1 |
|
149 |
Service indicator |
Fixed Length / 8.80 |
1 |
|
150 |
Detach Type |
Fixed Length / 8.81 |
1 |
|
151 |
Local Distiguished Name (LDN) |
Variable Length / 8.82 |
Not Applicable |
|
152 |
Node Features |
Extendable / 8.83 |
1 |
|
153 |
MBMS Time to Data Transfer |
Extendable / 8.84 |
1 |
|
154 |
Throttling |
Extendable / 8.85 |
2 |
|
155 |
Allocation/Retention Priority (ARP) |
Extendable / 8.86 |
1 |
|
156 |
EPC Timer |
Extendable / 8.87 |
1 |
|
157 |
Signalling Priority Indication |
Extendable / 8.88 |
1 |
|
158 |
Temporary Mobile Group Identity (TMGI) |
Extendable / 8.89 |
6 |
|
159 |
Additional MM context for SRVCC |
Extendable / 8.90 |
"e-4" (See Figure 8.90-1) |
|
160 |
Additional flags for SRVCC |
Extendable / 8.91 |
1 |
|
161 |
Reserved |
||
|
162 |
MDT Configuration |
Extendable / 8.93 |
"q-4" (See Figure 8.93-1) |
|
163 |
Additional Protocol Configuration Options (APCO) |
Extendable / 8.94 |
"m-4" (See Figure 8.94-1) |
|
164 |
Absolute Time of MBMS Data Transfer |
Extendable / 8.95 |
8 |
|
165 |
H(e)NB Information Reporting |
Extendable / 8.96 |
1 |
|
166 |
IPv4 Configuration Parameters (IP4CP) |
Extendable / 8.97 |
5 |
|
167 |
Change to Report Flags |
Extendable / 8.98 |
1 |
|
168 |
Action Indication |
Extendable / 8.99 |
1 |
|
169 |
TWAN Identifier |
Extendable / 8.100 |
"k+6-4" (See Figure 8.100-1) |
|
170 |
ULI Timestamp |
Extendable / 8.101 |
4 |
|
171 |
MBMS Flags |
Extendable / 8.102 |
1 |
|
172 |
RAN/NAS Cause |
Extendable / 8.103 |
"m-4" (See Figure 8.103-1) |
|
173 |
CN Operator Selection Entity |
Extendable / 8.104 |
1 |
|
174 |
Trusted WLAN Mode Indication |
Extendable / 8.105 |
1 |
|
175 |
Node Number |
Extendable / 8.106 |
"p-4" (See Figure 8.106-1) |
|
176 |
Node Identifier |
Extendable / 8.107 |
"q-4" (See Figure 8.107-1) |
|
177 |
Presence Reporting Area Action |
Extendable / 8.108 |
"t-4" (See Figure 8.108-1) |
|
178 |
Presence Reporting Area Information |
Extendable / 8.109 |
4 |
|
179 |
TWAN Identifier Timestamp |
Extendable / 8.110 |
4 |
|
180 |
Overload Control Information |
Extendable / 8.111 |
Not Applicable |
|
181 |
Load Control Information |
Extendable / 8.112 |
Not Applicable |
|
182 |
Metric |
Fixed Length / 8.113 |
1 |
|
183 |
Sequence Number |
Fixed Length / 8.114 |
4 |
|
184 |
APN and Relative Capacity |
Extendable / 8.115 |
"m-4" (See Figure 8.115 |
|
185 |
WLAN Offloadability Indication |
Extendable / 8.116 |
1 |
|
186 |
Paging and Service Information |
Extendable / 8.117 |
m-4 (See Figure 8.117-1) |
|
187 |
Integer Number |
Variable / 8.118 |
Not Applicable |
|
188 |
Millisecond Time Stamp |
Extendable / 8.119 |
6 |
|
189 |
Monitoring Event Information |
Extendable / 8.120 |
"k+2-4" (See Figure 8.120-1) |
|
190 |
ECGI List |
Extendable / 8.121 |
"m*7+2" (See Figure 8.121-1) |
|
191 |
Remote UE Context |
Extendable / 8.122 |
Not Applicable |
|
192 |
Remote User ID |
Extendable / 8.123 |
"c-4" (see Figure 8.123-1) |
|
193 |
Remote UE IP information |
Variable Length / 8.124 |
Not Applicable |
|
194 |
CIoT Optimizations Support Indication |
Extendable / 8.125 |
1 |
|
195 |
SCEF PDN Connection |
Extendable / 8.126 |
Not Applicable |
|
196 |
Header Compression Configuration |
Extendable / 8.127 |
4 |
|
197 |
Extended Protocol Configuration Options (ePCO) |
Variable Length / 8.128 |
Not Applicable |
|
198 |
Serving PLMN Rate Control |
Extendable / 8.129 |
4 |
|
199 |
Counter |
Extendable / 8.130 |
5 |
|
200 |
Mapped UE Usage Type |
Extendable / 8.131 |
2 |
|
201 |
Secondary RAT Usage Data Report |
Extendable / 8.132 |
27 |
|
202 |
UP Function Selection Indication Flags |
Extendable / 8.133 |
1 |
|
203 |
Maximum Packet Loss Rate |
Extendable / 8.134 |
1 |
|
204 |
APN Rate Control Status |
Extendable / 8.135 |
20 |
|
205 |
Extended Trace Information |
Extendable / 8.136 |
"r-4" (see figure 8.136-1) |
|
206 |
Monitoring Event Extension Information |
Extendable / 8.137 |
"k-4" (See Figure 8.137-1) |
|
207 |
Additional RRM Policy Index |
Fixed Length / 8.138 |
4 |
|
208 |
V2X Context |
Extendable / 8.139 |
Not Applicable |
|
209 |
PC5 QoS Parameters |
Extendable / 8.140 |
Not Applicable |
|
210 |
Services Authorized |
Extendable / 8.141 |
2 |
|
211 |
Bit Rate |
Extendable / 8.142 |
4 |
|
212 |
PC5 QoS Flow |
Extendable / 8.143 |
11 |
|
213 |
SGi PtP Tunnel Address |
Extendable / 8.144 |
1 |
|
214 |
PGW Change Info |
Extendable / 8.145 |
Not Applicable |
|
215 |
PGW FQDN |
Extendable / 8.146 |
m-4 |
|
216 |
Group Id |
Variable Length / 8.147 |
Not Applicable |
|
217 |
PSCell ID |
Fixed Length / 8.148 |
8 |
|
218 |
UP Security Policy |
Extendable / 8.149 |
1 |
|
219 |
Alternative IMSI |
Variable Length / 8.150 |
Not Applicable |
|
220 to 253 |
Spare. For future use. |
||
|
254 |
Special IE type for IE Type Extension |
See NOTE 2 |
Not Applicable |
|
255 |
Private Extension |
Variable Length / 8.67 |
Not Applicable |
|
256 to 65535 |
Spare. For future use. |
||
|
NOTE 1: The size of the TLI (Type, Length and Instance) fields, i.e "4" octets, has been subtracted from the number of the fixed octets of the "Fixed Length" and "Extendable" IEs. Hence for some of the "Extendable" IEs, for which the length is defined in terms of variable number of octets, "4" is explicitly subtracted while defining the fixed number of octets. E.g. Length of User Location Information is defined as "f+4" and fixed number of octets for the same is defined as "f+4-4". NOTE 2: The IE Type value 254 indicates that the IE Type shall be further identified by an IE Type Extension field; see clause 8.2.1A. A GTP-C entity which does not support any IE Type encoded with an IE Type Extension field shall ignore an IE received with the IE Type value 254. |
|||