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 16Stage 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]

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 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.