7 Message functional definition and contents
24.5873GPPRelease 18Stage 3TSVehicle-to-Everything (V2X) services in 5G System (5GS)
7.1 Overview
This clause contains the definition and contents of the messages used in the procedures described in the present document.
7.2 Provisioning of parameters for V2X configuration signalling messages
7.2.1 UE policy provisioning request
7.2.1.1 Message definition
The UE POLICY PROVISIONING REQUEST message is sent by the UE to the PCF to request the PCF to manage V2XP, ProSeP or both, see table 7.2.1.1.1
Message type: UE POLICY PROVISIONING REQUEST
Significance: dual
Direction: UE to network
Table 7.2.1.1.1: UE POLICY PROVISIONING REQUEST message content
|
IEI |
Information Element |
Type/Reference |
Presence |
Format |
Length |
|
PTI |
Procedure transaction identity TS 24 501 [4] clause 9.6 |
M |
V |
1 |
|
|
UE POLICY PROVISIONING REQUEST message identity |
UE policy delivery service message type TS 24 501 [4] clause D.6.1 |
M |
V |
1 |
|
|
Requested UE policies |
Requested UE policies 8.3.2 |
M |
LV |
2-3 |
7.2.2 UE policy provisioning reject
7.2.2.1 Message definition
The UE POLICY PROVISIONING REJECT message is sent by the PCF to the UE to report that the PCF rejects reques, ProSeP or both t to manage V2XP, see table 7.2.2.1.1
Message type: UE POLICY PROVISIONING REJECT
Significance: dual
Direction: network to UE
Table 7.2.2.1.1: UE POLICY PROVISIONING REJECT message content
|
IEI |
Information Element |
Type/Reference |
Presence |
Format |
Length |
|
PTI |
Procedure transaction identity TS 24 501 [4] clause 9.6 |
M |
V |
1 |
|
|
UE POLICY PROVISIONING REJECT message identity |
UE policy delivery service message type TS 24 501 [4] clause D.6.1 |
M |
V |
1 |
|
|
UPDS cause |
UPDS cause 8.3.1 |
M |
V |
1 |
7.3 V2X communication over PC5 signalling messages
7.3.1 Direct link establishment request
7.3.1.1 Message definition
This message is sent by a UE to another peer UE to establish a direct link. See table 7.3.1.1.1.
Message type: DIRECT LINK ESTABLISHMENT REQUEST
Significance: dual
Direction: UE to peer UE
Table 7.3.1.1.1: DIRECT LINK ESTABLISHMENT REQUEST message content
|
IEI |
Information Element |
Type/Reference |
Presence |
Format |
Length |
|
DIRECT LINK ESTABLISHMENT REQUEST message identity |
PC5 signalling message type 8.4.1 |
M |
V |
1 |
|
|
Sequence number |
Sequence number 8.4.2 |
M |
V |
1 |
|
|
V2X service identifiers |
V2X service identifier 8.4.3 |
M |
LV |
5-253 |
|
|
Source user info |
Application layer ID 8.4.4 |
M |
LV |
3-253 |
|
|
UE security capabilities |
UE security capabilities 8.4.14 |
M |
LV |
3-9 |
|
|
UE PC5 unicast signalling security policy |
UE PC5 unicast signalling security policy 8.4.15 |
M |
V |
1 |
|
|
74 |
Key establishment information container |
Key establishment information container 8.4.12 |
O |
TLV-E |
4-n |
|
53 |
Nonce_1 |
Nonce 8.4.13 |
O |
TV |
17 |
|
54 |
MSB of KNRP-sess ID |
MSB of KNRP-sess ID 8.4.16 |
O |
TV |
2 |
|
28 |
Target user info |
Application layer ID 8.4.4 |
O |
TLV |
4-254 |
|
52 |
KNRP ID |
KNRP ID 8.4.17 |
O |
TV |
5 |
7.3.1.2 Target user info
The UE shall include this IE if it has received the target UE’s application layer ID from upper layers or if the destination layer-2 ID is the unicast layer-2 ID of target UE.
7.3.1.3 Key establishment information container
The UE shall include this IE if the UE PC5 unicast signalling security policy is set to "signalling integrity protection required" or "signalling integrity protection preferred".
7.3.1.4 Nonce_1
The UE shall include this IE if the UE PC5 unicast signalling security policy is set to "signalling integrity protection required" or "signalling integrity protection preferred".
7.3.1.5 MSB of KNRP-sess ID
The UE shall include this IE if the UE PC5 unicast signalling security policy is set to "signalling integrity protection required" or "signalling integrity protection preferred".
7.3.1.6 KNRP ID
The UE may include this IE if it has an existing KNRP for the target UE.
7.3.2 Direct link establishment accept
7.3.2.1 Message definition
This message is sent by a UE to another peer UE to accept the received DIRECT LINK ESTABLISHMENT REQUEST message. See table 7.3.2.1.1.
Message type: DIRECT LINK ESTABLISHMENT ACCEPT
Significance: dual
Direction: UE to peer UE
Table 7.3.2.1.1: DIRECT LINK ESTABLISHMENT ACCEPT message content
|
IEI |
Information Element |
Type/Reference |
Presence |
Format |
Length |
|
DIRECT LINK ESTABLISHMENT ACCEPT message identity |
PC5 signalling message type 8.4.1. |
M |
V |
1 |
|
|
Sequence number |
Sequence number 8.4.2 |
M |
V |
1 |
|
|
Source user info |
Application layer ID 8.4.4 |
M |
LV |
3-253 |
|
|
QoS flow descriptions |
PC5 QoS flow descriptions 8.4.5 |
M |
LV-E |
5-65537 |
|
|
Configuration of UE PC5 unicast user plane security protection |
Configuration of UE PC5 unicast user plane security protection 8.4.23 |
M |
V |
1 |
|
|
57 |
IP address configuration |
IP address configuration 8.4.6 |
O |
TV |
2 |
|
58 |
Link local IPv6 address |
Link local IPv6 address 8.4.7 |
O |
TV |
17 |
7.3.2.2 IP address configuration
The UE shall include this IE if IP communication is used.
7.3.2.3 Link local IPv6 address
The UE shall include this IE if IP communication is used and the IP address configuration is set to "IPv6 address allocation not supported".
7.3.3 Void
7.3.4 Direct link modification request
7.3.4.1 Message definition
This message is sent by the UE to another peer UE to initiate the direct link modification procedure. See table 7.3.4.1.1.
Message type: DIRECT LINK MODIFICATION REQUEST
Significance: dual
Direction: UE to peer UE
Table 7.3.4.1.1: DIRECT LINK MODIFICATION REQUEST message content
|
IEI |
Information Element |
Type/Reference |
Presence |
Format |
Length |
|
DIRECT LINK MODIFICATION REQUEST message identity |
PC5 signalling message type 8.4.1 |
M |
V |
1 |
|
|
Sequence number |
Sequence number 8.4.2 |
M |
V |
1 |
|
|
Link modification operation code |
Link modification operation code 8.4.8 |
M |
V |
1 |
|
|
QoS flow descriptions |
PC5 QoS flow descriptions 8.4.5 |
M |
LV-E |
5-65537 |
7.3.5 Direct link modification accept
7.3.5.1 Message definition
This message is sent by the UE to another peer UE to indicate that the link modification request is accepted. See table 7.3.5.1.1
Message type: DIRECT LINK MODIFICATION ACCEPT
Significance: dual
Direction: UE to peer UE
Table 7.3.5.1.1: DIRECT LINK MODIFICATION ACCEPT message content
|
IEI |
Information Element |
Type/Reference |
Presence |
Format |
Length |
|
DIRECT LINK MODIFICATION ACCEPT message identity |
PC5 signalling message type 8.4.1 |
M |
V |
1 |
|
|
Sequence number |
Sequence number 8.4.2 |
M |
V |
1 |
|
|
79 |
QoS flow descriptions |
PC5 QoS flow descriptions 8.4.5 |
O |
TLV-E |
6-65538 |
7.3.5.2 QoS flow descriptions
The UE shall include this IE if the PC5 unicast link modification procedure is to:
a) add new PC5 QoS flow(s) to the existing PC5 unicast link;
b) modify PC5 QoS parameters of the existing PC5 QoS flow(s);
c) associate new V2X service(s) with existing PC5 QoS flow(s); or
d) remove V2X service(s) from existing PC5 QoS flow(s).
7.3.6 Direct link release request
7.3.6.1 Message definition
This message is sent by the UE to another peer UE to initiate the direct link release procedure. See table 7.3.6.1.1.
Message type: DIRECT LINK RELEASE REQUEST
Significance: dual
Direction: UE to peer UE
Table 7.3.6.1.1: DIRECT LINK RELEASE REQUEST message content
|
IEI |
Information Element |
Type/Reference |
Presence |
Format |
Length |
|
DIRECT LINK RELEASE REQUEST message identity |
PC5 signalling message type 8.4.1 |
M |
V |
1 |
|
|
Sequence number |
Sequence number 8.4.2 |
M |
V |
1 |
|
|
PC5 signalling protocol cause |
PC5 signalling protocol cause 8.4.9 |
M |
V |
1 |
|
|
MSBs of KNRP ID |
MSBs of KNRP ID 8.4.20 |
M |
V |
2 |
7.3.7 Direct link release accept
7.3.7.1 Message definition
This message is sent by the UE to another peer UE to indicate that the link release request is accepted. See table 7.3.7.1.
Message type: DIRECT LINK RELEASE ACCEPT
Significance: dual
Direction: UE to peer UE
Table 7.3.7.1: DIRECT LINK RELEASE ACCEPT message content
|
IEI |
Information Element |
Type/Reference |
Presence |
Format |
Length |
|
DIRECT_LINK_RELEASE ACCEPT message identity |
PC5 signalling message type 8.4.1 |
M |
V |
1 |
|
|
Sequence number |
Sequence number 8.4.2 |
M |
V |
1 |
|
|
LSBs of KNRP ID |
LSBs of KNRP ID 8.4.21 |
M |
V |
2 |
7.3.8 Direct link keepalive request
7.3.8.1 Message definition
This message is sent by a UE to another peer UE when a PC5 unicast link keep-alive procedure is initiated. See table 7.3.8.1.1.
Message type: DIRECT LINK KEEPALIVE REQUEST
Significance: dual
Direction: UE to peer UE
Table 7.3.8.1.1: DIRECT LINK KEEPALIVE REQUEST message content
|
IEI |
Information Element |
Type/Reference |
Presence |
Format |
Length |
|
DIRECT LINK KEEPALIVE REQUEST message identity |
PC5 signalling message type 8.4.1. |
M |
V |
1 |
|
|
Sequence number |
Sequence number 8.4.2 |
M |
V |
1 |
|
|
Keep-alive counter |
Keep-alive counter 8.4.10 |
M |
V |
4 |
|
|
55 |
Maximum inactivity period |
Maximum inactivity period 8.4.11 |
O |
TV |
5 |
7.3.8.2 Maximum inactivity period
The UE may include this IE to indicate its maximum inactivity period to the peer UE.
7.3.9 Direct link keepalive response
7.3.9.1 Message definition
This message is sent by a UE to another peer UE to respond to a DIRECT LINK KEEPALIVE REQUEST message. See table 7.3.9.1.1.
Message type: DIRECT LINK KEEPALIVE RESPONSE
Significance: dual
Direction: UE to peer UE
Table 7.3.9.1.1: DIRECT LINK KEEPALIVE RESPONSE message content
|
IEI |
Information Element |
Type/Reference |
Presence |
Format |
Length |
|
DIRECT LINK KEEPALIVE RESPONSE message identity |
PC5 signalling message type 8.4.1. |
M |
V |
1 |
|
|
Sequence number |
Sequence number 8.4.2 |
M |
V |
1 |
|
|
Keep-alive counter |
Keep-alive counter 8.4.10 |
M |
V |
4 |
7.3.10 Direct link authentication request
7.3.10.1 Message definition
This message is sent by a UE to another peer UE when a PC5 unicast link authentication procedure is initiated. See table 7.3.10.1.1.
Message type: DIRECT LINK AUTHENTICATION REQUEST
Significance: dual
Direction: UE to peer UE
Table 7.3.10.1.1: DIRECT LINK AUTHENTICATION REQUEST message content
|
IEI |
Information Element |
Type/Reference |
Presence |
Format |
Length |
|
DIRECT LINK AUTHENTICATION REQUEST message identity |
PC5 signalling message type 8.4.1. |
M |
V |
1 |
|
|
Sequence number |
Sequence number 8.4.2 |
M |
V |
1 |
|
|
Key establishment information container |
Key establishment information container 8.4.12 |
M |
LV-E |
3-n |
7.3.11 Direct link authentication response
7.3.11.1 Message definition
This message is sent by a UE to another peer UE to respond to a DIRECT LINK AUTHENTICATION REQUEST message. See table 7.3.11.1.1.
Message type: DIRECT LINK AUTHENTICATION RESPONSE
Significance: dual
Direction: UE to peer UE
Table 7.3.11.1.1: DIRECT LINK AUTHENTICATION RESPONSE message content
|
IEI |
Information Element |
Type/Reference |
Presence |
Format |
Length |
|
DIRECT LINK AUTHENTICATION RESPONSE message identity |
PC5 signalling message type 8.4.1. |
M |
V |
1 |
|
|
Sequence number |
Sequence number 8.4.2 |
M |
V |
1 |
|
|
Key establishment information container |
Key establishment information container 8.4.12 |
M |
LV-E |
3-n |
7.3.12 Direct link authentication reject
7.3.12.1 Message definition
This message is sent by a UE to another peer UE to reject a DIRECT LINK AUTHENTICATION REQUEST message. See table 7.3.12.1.1.
Message type: DIRECT LINK AUTHENTICATION REJECT
Significance: dual
Direction: UE to peer UE
Table 7.3.12.1.1: DIRECT LINK AUTHENTICATION REJECT message content
|
IEI |
Information Element |
Type/Reference |
Presence |
Format |
Length |
|
DIRECT LINK AUTHENTICATION REJECT message identity |
PC5 signalling message type 8.4.1. |
M |
V |
1 |
|
|
Sequence number |
Sequence number 8.4.2 |
M |
V |
1 |
|
|
PC5 signalling protocol cause value |
PC5 signalling protocol cause value 8.4.9 |
M |
V |
1 |
7.3.13 Direct link security mode command
7.3.13.1 Message definition
This message is sent by a UE to another peer UE when a PC5 unicast link security mode control procedure is initiated. See table 7.3.13.1.1.
Message type: DIRECT LINK SECURITY MODE COMMAND
Significance: dual
Direction: UE to peer UE
Table 7.3.13.1.1: DIRECT LINK SECURITY MODE COMMAND message content
|
IEI |
Information Element |
Type/Reference |
Presence |
Format |
Length |
|
DIRECT LINK SECURITY MODE COMMAND message identity |
PC5 signalling message type 8.4.1. |
M |
V |
1 |
|
|
Sequence number |
Sequence number 8.4.2 |
M |
V |
1 |
|
|
Selected security algorithms |
Selected security algorithms 8.4.18 |
M |
V |
1 |
|
|
UE security capabilities |
UE security capabilities 8.4.14 |
M |
LV |
3-9 |
|
|
59 |
UE PC5 unicast signalling security policy |
UE PC5 unicast signalling security policy 8.4.15 |
O |
TV |
2 |
|
55 |
Nonce_2 |
Nonce 8.4.13 |
O |
TV |
17 |
|
52 |
LSB of KNRP-sess ID |
LSB of KNRP-sess ID 8.4.19 |
O |
TV |
2 |
|
74 |
Key establishment information container |
Key establishment information container 8.4.12 |
O |
TLV-E |
4-n |
|
62 |
MSBs of KNRP ID |
MSBs of KNRP ID 8.4.20 |
O |
TV |
3 |
7.3.13.2 Nonce_2
The UE shall include this IE if the selected integrity protection algorithms is not the null integrity protection algorithm.
7.3.13.3 LSB of KNRP-sess ID
The UE shall include this IE if the selected integrity protection algorithms is not the null integrity protection algorithm.
7.3.13.4 Key establishment information container
The UE shall include this IE if the UE has derived a new KNRP and the authentication method used to generate KNRP requires sending information to complete the authentication procedure.
7.3.13.5 MSBs of KNRP ID
The UE shall include this IE if the UE has derived a new KNRP.
7.3.13.6 UE PC5 unicast signalling security policy
The UE shall include this IE if the DIRECT LINK SECURITY MODE COMMAND message is triggered by the DIRECT LINK ESTABLISHMENT REQUEST message. The content of the IE is the same as the content of UE PC5 unicast signalling security policy IE in the received DIRECT LINK ESTABLISHMENT REQUEST message in order to provide protection against bidding down attacks.
7.3.14 Direct link security mode complete
7.3.14.1 Message definition
This message is sent by a UE to another peer UE to respond to a DIRECT LINK SECURITY MODE COMMAND message. See table 7.3.14.1.1.
Message type: DIRECT LINK SECURITY MODE COMPLETE
Significance: dual
Direction: UE to peer UE
Table 7.3.14.1.1: DIRECT LINK SECURITY MODE COMPLETE message content
|
IEI |
Information Element |
Type/Reference |
Presence |
Format |
Length |
|
DIRECT LINK SECURITY MODE COMPLETE message identity |
PC5 signalling message type 8.4.1. |
M |
V |
1 |
|
|
Sequence number |
Sequence number 8.4.2 |
M |
V |
1 |
|
|
QoS flow descriptions |
PC5 QoS flow descriptions 8.4.5 |
M |
LV-E |
6-n |
|
|
UE PC5 unicast user plane security policy |
UE PC5 unicast user plane security policy 8.4.22 |
M |
V |
1 |
|
|
57 |
IP address configuration |
IP address configuration 8.4.6 |
O |
TV |
2 |
|
58 |
Link local IPv6 address |
Link local IPv6 address 8.4.7 |
O |
TV |
17 |
|
52 |
LSBs of KNRP ID |
LSBs of KNRP ID 8.4.21 |
O |
TV |
3 |
7.3.14.2 IP address configuration
The UE shall include this IE if IP communication is used and the PC5 unicast link security mode control procedure was triggered during a PC5 unicast link establishment procedure.
7.3.14.3 Link local IPv6 address
The UE shall include this IE if IP communication is used, the IP address configuration is set to "IPv6 address allocation not supported" and the PC5 unicast link security mode control procedure was triggered during a PC5 unicast link establishment procedure.
7.3.14.4 LSBs of KNRP ID
The UE shall include this IE if a new KNRP was derived.
7.3.15 Direct link security mode reject
7.3.15.1 Message definition
This message is sent by a UE to another peer UE to reject a DIRECT LINK SECURITY MODE COMMAND message. See table 7.3.15.1.1.
Message type: DIRECT LINK SECURITY MODE REJECT
Significance: dual
Direction: UE to peer UE
Table 7.3.15.1.1: DIRECT LINK SECURITY MODE REJECT message content
|
IEI |
Information Element |
Type/Reference |
Presence |
Format |
Length |
|
DIRECT LINK SECURITY MODE REJECT message identity |
PC5 signalling message type 8.4.1. |
M |
V |
1 |
|
|
Sequence number |
Sequence number 8.4.2 |
M |
V |
1 |
|
|
PC5 signalling protocol cause |
PC5 signalling protocol cause 8.4.9 |
M |
V |
1 |
7.3.16 Direct link rekeying request
7.3.16.1 Message definition
This message is sent by a UE to another peer UE when a PC5 unicast link re-keying procedure is initiated. See table 7.3.16.1.1.
Message type: DIRECT LINK REKEYING REQUEST
Significance: dual
Direction: UE to peer UE
Table 7.3.16.1.1: DIRECT LINK REKEYING REQUEST message content
|
IEI |
Information Element |
Type/Reference |
Presence |
Format |
Length |
|
DIRECT LINK REKEYING REQUEST message identity |
PC5 signalling message type 8.4.1. |
M |
V |
1 |
|
|
Sequence number |
Sequence number 8.4.2 |
M |
V |
1 |
|
|
UE security capabilities |
UE security capabilities 8.4.14 |
M |
LV |
3-9 |
|
|
74 |
Key establishment information container |
Key establishment information container 8.4.12 |
O |
TLV-E |
4-n |
|
53 |
Nonce_1 |
Nonce 8.4.13 |
O |
TV |
17 |
|
54 |
MSB of KNRP-sess ID |
MSB of KNRP-sess ID 8.4.16 |
O |
TV |
2 |
|
56 |
Re-authentication indication |
Re-authentication indication 8.4.24 |
O |
TV |
2 |
7.3.16.2 Key establishment information container
The UE shall include this IE if the null integrity protection algorithm is not in use.
7.3.16.3 Nonce_1
The UE shall include this IE if the null integrity protection algorithm is not in use.
7.3.16.4 MSB of KNRP-sess ID
The UE shall include this IE if the null integrity protection algorithm is not in use.
7.3.16.5 Re-authentication indication
The UE shall include this IE if the UE wants to derive a new KNRP.
7.3.17 Direct link rekeying response
7.3.17.1 Message definition
This message is sent by a UE to another peer UE to respond to a DIRECT LINK REKEYING REQUEST message. See table 7.3.17.1.1.
Message type: DIRECT LINK REKEYING RESPONSE
Significance: dual
Direction: UE to peer UE
Table 7.3.17.1.1: DIRECT LINK REKEYING RESPONSE message content
|
IEI |
Information Element |
Type/Reference |
Presence |
Format |
Length |
|
DIRECT LINK REKEYING RESPONSE message identity |
PC5 signalling message type 8.4.1. |
M |
V |
1 |
|
|
Sequence number |
Sequence number 8.4.2 |
M |
V |
1 |
7.3.18 Direct link identifier update request
7.3.18.1 Message definition
This message is sent by a UE to another peer UE to initiate the direct link identifier procedure. See table 7.3.18.1.1.
Message type: DIRECT LINK IDENTIFIER UPDATE REQUEST
Significance: dual
Direction: UE to peer UE
Table 7.3.18.1.1: DIRECT LINK IDENTIFIER UPDATE REQUEST message content
|
IEI |
Information Element |
Type/Reference |
Presence |
Format |
Length |
|
DIRECT LINK IDENTIFIER UPDATE REQUEST message identity |
PC5 signalling message type 8.4.1 |
M |
V |
1 |
|
|
Sequence number |
Sequence number 8.4.2 |
M |
V |
1 |
|
|
MSB of KNRP-sess ID |
MSB of KNRP-sess ID 8.4.16 |
M |
V |
1 |
|
|
Source layer-2 ID |
Layer-2 ID 8.4.25 |
M |
V |
3 |
|
|
57 |
Source user info |
Application layer ID 8.4.4 |
O |
TLV |
4-254 |
|
58 |
Source link local IPv6 address |
Link local IPv6 address 8.4.7 |
O |
TV |
17 |
7.3.18.2 Source user info
This IE is included when the initiating UE receives a new application layer ID.
7.3.18.3 Source link local IPv6 address
This IE is included when the link local IPv6 address changes at the initiating UE.
7.3.19 Direct link identifier update accept
7.3.19.1 Message definition
This message is sent by the UE to another peer UE to indicate that the link identifier update request is accepted. See table 7.3.19.1.1.
Message type: DIRECT LINK IDENTIFIER UPDATE ACCEPT
Significance: dual
Direction: UE to peer UE
Table 7.3.19.1.1: DIRECT LINK IDENTIFIER UPDATE ACCEPT message content
|
IEI |
Information Element |
Type/Reference |
Presence |
Format |
Length |
|
DIRECT LINK IDENTIFIER UPDATE ACCEPT message identity |
PC5 signalling message type 8.4.1 |
M |
V |
1 |
|
|
Sequence number |
Sequence number 8.4.2 |
M |
V |
1 |
|
|
LSB of KNRP-sess ID |
LSB of KNRP-sess ID 8.4.19 |
M |
V |
1 |
|
|
MSB of KNRP-sess ID |
MSB of KNRP-sess ID 8.4.16 |
M |
V |
1 |
|
|
Source layer-2 ID |
Layer-2 ID 8.4.25 |
M |
V |
3 |
|
|
Target layer-2 ID |
Layer-2 ID 8.4.25 |
M |
V |
3 |
|
|
28 |
Target user info |
Application layer ID 8.4.4 |
O |
TLV |
4-254 |
|
59 |
Target link local IPv6 address |
Link local IPv6 address 8.4.7 |
O |
TV |
17 |
|
57 |
Source user info |
Application layer ID 8.4.4 |
O |
TLV |
4-254 |
|
58 |
Source link local IPv6 address |
Link local IPv6 address 8.4.7 |
O |
TV |
17 |
7.3.19.2 Target user info
This IE is included if the target UE receives the Source user info IE in the DIRECT LINK IDENTIFIER UPDATE REQUEST message.
7.3.19.3 Target link local IPv6 address
This IE is included if the target UE receives the Source link local IPv6 address IE in the DIRECT LINK IDENTIFIER UPDATE REQUEST message.
7.3.19.4 Source user info
This IE is included when the application layer ID changes at the target UE and the target UE receives a new application layer ID from the upper layers.
7.3.19.5 Source link local IPv6 address
This IE is included when the link local IPv6 address changes at the target UE and the target UE receives a new Link local IPv6 address from the upper layers.
7.3.20 Direct link identifier update ack
7.3.20.1 Message definition
This message is sent by the initiating UE to target UE to indicate that the initiating UE has received target UE’s accept message. See table 7.3.20.1.1.
Message type: DIRECT LINK IDENTIFIER UPDATE ACK
Significance: dual
Direction: UE to peer UE
Table 7.3.20.1.1: DIRECT LINK IDENTIFIER UPDATE ACK message content
|
IEI |
Information Element |
Type/Reference |
Presence |
Format |
Length |
|
DIRECT LINK IDENTIFIER UPDATE ACK message identity |
PC5 signalling message type 8.4.1 |
M |
V |
1 |
|
|
Sequence number |
Sequence number 8.4.2 |
M |
V |
1 |
|
|
LSB of KNRP-sess ID |
LSB of KNRP-sess ID 8.4.19 |
M |
V |
1 |
|
|
Target layer-2 ID |
Layer-2 ID 8.4.25 |
M |
V |
3 |
|
|
28 |
Target user info |
Application layer ID 8.4.4 |
O |
TLV |
4-254 |
|
59 |
Target link local IPv6 address |
Link local IPv6 address 8.4.7 |
O |
TV |
17 |
7.3.20.2 Target user info
This IE is included when the initiating UE receives the Source user info IE in the DIRECT LINK IDENTIFIER UPDATE ACCEPT message.
7.3.20.3 Target link local IPv6 address
This IE is included when the initiating UE receives the Source link local IPv6 address IE in the DIRECT LINK IDENTIFIER UPDATE ACCEPT message.
7.3.21 Direct link identifier update reject
7.3.21.1 Message definition
This message is sent by the target UE to initiating UE to indicate that the link identifier update request is not accepted. See table 7.3.21.1.1.
Message type: DIRECT LINK IDENTIFIER UPDATE REJECT
Significance: dual
Direction: UE to peer UE
Table 7.3.21.1.1: DIRECT LINK IDENTIFIER UPDATE REJECT message content
|
IEI |
Information Element |
Type/Reference |
Presence |
Format |
Length |
|
DIRECT LINK IDENTIFIER UPDATE REJECT message identity |
PC5 signalling message type 8.4.1 |
M |
V |
1 |
|
|
Sequence number |
Sequence number 8.4.2 |
M |
V |
1 |
|
|
PC5 signalling protocol cause |
PC5 signalling protocol cause 8.4.9 |
M |
V |
1 |
7.3.22 Direct link modification reject
7.3.22.1 Message definition
This message is sent by the UE to another peer UE to indicate that the link modification request is not accepted. See table 7.3.22.1.1.
Message type: DIRECT LINK MODIFICATION REJECT
Significance: dual
Direction: UE to peer UE
Table 7.3.22.1.1: DIRECT LINK MODIFICATION REJECT message content
|
IEI |
Information Element |
Type/Reference |
Presence |
Format |
Length |
|
DIRECT LINK MODIFICATION REJECT message identity |
PC5 signalling message type 8.4.1 |
M |
V |
1 |
|
|
Sequence number |
Sequence number 8.4.2 |
M |
V |
1 |
|
|
PC5 signalling protocol cause |
PC5 signalling protocol cause 8.4.9 |
M |
V |
1 |
7.3.23 Direct link establishment reject
7.3.23.1 Message definition
This message is sent by the UE to another peer UE to indicate that the link establishment request is not accepted. See table 7.3.23.1.1.
Message type: DIRECT LINK ESTABLISHMENT REJECT
Significance: dual
Direction: UE to peer UE
Table 7.3.23.1.1: DIRECT LINK ESTABLISHMENT REJECT message content
|
IEI |
Information Element |
Type/Reference |
Presence |
Format |
Length |
|
DIRECT LINK ESTABLISHMENT REJECT message identity |
PC5 signalling message type 8.4.1 |
M |
V |
1 |
|
|
Sequence number |
Sequence number 8.4.2 |
M |
V |
1 |
|
|
PC5 signalling protocol cause |
PC5 signalling protocol cause 8.4.9 |
M |
V |
1 |
7.3.24 Direct link authentication failure
7.3.24.1 Message definition
This message is sent by a UE to another peer UE to reject a DIRECT LINK AUTHENTICATION RESPONSE message. See table 7.3.24.1.1.
Message type: DIRECT LINK AUTHENTICATION FAILURE
Significance: dual
Direction: UE to peer UE
Table 7.3.24.1.1: DIRECT LINK AUTHENTICATION FAILURE message content
|
IEI |
Information Element |
Type/Reference |
Presence |
Format |
Length |
|
DIRECT LINK AUTHENTICATION FAILURE message identity |
PC5 signalling message type 8.4.1. |
M |
V |
1 |
|
|
Sequence number |
Sequence number 8.4.2 |
M |
V |
1 |
|
|
74 |
Key establishment information container |
Key establishment information container 8.4.12 |
O |
TLV-E |
4-n |
7.3.24.2 Key establishment information container
The UE shall include this IE if it is provided by upper layers.