GB/T 45315-2025 English PDF (GB/T45315-2025)

GB/T 45315-2025: Technical requirements and test methods of vehicular information interactive systems based on LTE-V2X direct communication
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GB/T 45315-2025
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 43.040.10
CCS T 36
Technical requirements and test methods of vehicular
information interactive systems based on LTE-V2X direct
communication
ISSUED ON: FEBRUARY 28, 2025
IMPLEMENTED ON: FEBRUARY 28, 2025
Issued by: State Administration for Market Regulation;
National Standardization Administration.
Table of Contents
Foreword ... 3
1 Scope ... 4
2 Normative references ... 4
3 Terms and definitions, symbols and abbreviations ... 5
4 System description ... 7
5 Vehicle environment requirements ... 9
6 Positioning and timing requirements ... 14
7 Functional requirements ... 15
8 Communication performance requirements ... 47
9 Test method ... 48
Appendix A (Informative) Technical requirements and test methods for electromagnetic
compatibility of LTE-V2X system ... 79
Appendix B (Informative) Key event triggered BSM message transmission ... 82
Appendix C (Informative) Congestion control mechanism ... 84
Appendix D (Normative) Basic vehicle types and numbers ... 91
Appendix E (Informative) Reference design of vehicle history trajectory and predicted
route ... 95
Appendix F (Normative) Vehicle orientation zone division ... 98
Appendix G (Informative) Durability test ... 100
Appendix H (Informative) Requirements for vehicle antenna performance test site 103
References ... 105
Technical requirements and test methods of vehicular
information interactive systems based on LTE-V2X direct
communication
1 Scope
This document specifies the system description, vehicle environment requirements,
positioning and timing requirements, functional requirements, communication
performance requirements, test methods of the vehicular information interaction system
based on long-term evolution vehicle wireless communication technology (LTE-V2X)
supporting direct communication.
This document is applicable to Class M and Class N vehicles.
Note: In the absence of ambiguity, this document will refer to the vehicular information
interaction system based on LTE-V2X direct communication, abbreviated as LTE-V2X system.
2 Normative references
The contents of the following documents constitute essential clauses of this document
through normative references in the text. For references with dates, only the versions
corresponding to the dates apply to this document; for references without dates, the
latest versions (including all amendments) apply to this document.
GB/T 28046.2-2019 Road vehicles - Environmental conditions and testing for
electrical and electronic equipment - Part 2: Electrical loads
GB/T 28046.3-2011 Road vehicles - Environmental conditions and testing for
electrical and electronic equipment - Part 3: Mechanical loads
GB/T 28046.4-2011 Road vehicles - Environmental conditions and testing for
electrical and electronic equipment - Part 4: Climatic loads
GB/T 30038-2013 Road vehicles - Degrees of electrical equipment protection (IP-
Code)
GB 34660-2017 Road vehicles - Requirements and test methods of electromagnetic
compatibility
YD/T 3340-2018 Technical requirements of air interface of LTE-based vehicular
5.3.5 High temperature operation
Perform the test in accordance with 9.1.3.4; the functional status of the LTE-V2X
system shall meet the requirements of 5.1 Level A.
5.3.6 Temperature gradient
Perform the test in accordance with 9.1.3.5; the functional status of the LTE-V2X
system shall meet the requirements of 5.1 Level A.
5.3.7 Rapid temperature change with specified switching time
Perform the test in accordance with 9.1.3.6; the functional status of the LTE-V2X
system shall meet the requirements of 5.1 Level B.
5.3.8 Temperature cycling with specified change rate
Perform the test in accordance with 9.1.3.7; the functional status of the LTE-V2X
system shall meet the requirements of 5.1 Level A.
5.3.9 Damp heat cycling
Perform the test in accordance with 9.1.3.8; the functional status of the LTE-V2X
system shall meet the requirements of 5.1 Level A.
5.3.10 Steady-state damp heat
Perform the test in accordance with 9.1.3.9; the functional status of the LTE-V2X
system shall meet the requirements of 5.1 Level A.
5.3.11 Salt spray resistance
Perform the test in accordance with 9.1.3.10, to check the appearance of the LTE-V2X
system. It shall be sealed intact; the sign and label shall be clearly visible; its functional
status shall meet the requirements of 5.1 Level B.
5.4 Shell protection
Perform the test in accordance with 9.1.4 according to the requirements of Table A.1 of
GB/T 28046.4-2011. The LTE-V2X system function shall meet the requirements of 5.1
Level B.
5.5 Mechanical properties
5.5.1 Mechanical vibration
Perform the test in accordance with 9.1.5.1. The LTE-V2X system shall not have
physical damage; its functional status shall meet the requirements of 5.1 Level A.
5.5.2 Mechanical shock
Perform the test in accordance with 9.1.5.2. The LTE-V2X system shall not have
physical damage; its functional status shall meet the requirements of 5.1 Level A.
5.5.3 Free fall
The LTE-V2X system shall not have invisible damage, when tested in accordance with
9.1.5.3. Minor damage to the outer shell is allowed without affecting the performance
of the LTE-V2X system. Its functional status shall meet the requirements of 5.1 Level
B.
5.6 Durability
The LTE-V2X system shall not have physical damage when tested in accordance with
9.1.6. Its service life shall not be less than 10 years.
5.7 Electromagnetic compatibility
5.7.1 Electromagnetic compatibility of vehicles
5.7.1.1 Broadband radiated emission
The vehicle shall meet the requirements of 4.2 of GB 34660-2017, when tested in
accordance with 9.1.7.1.4.1.
5.7.1.2 Narrowband radiated emission
The vehicle shall meet the requirements of 4.3 of GB 34660-2017, when tested in
accordance with 9.1.7.1.4.2.
5.7.1.3 Immunity to electromagnetic radiation
Perform the test in accordance with 9.1.7.1.4.3. During and after the test, the number
of BSM data packets received by the V2X PC5 message receiving instrument, within
the continuous test time t (in seconds) of the vehicle, shall not be less than round
(t×10×95%).
Note: round means integer.
5.7.2 System electromagnetic compatibility
The electromagnetic compatibility requirements of the LTE-V2X system are shown in
Appendix A.
the corresponding UTC time each time it outputs a position.
7 Functional requirements
7.1 Access layer configuration requirements
7.1.1 General requirements for PC5 interface
The system shall set the pre-configured parameters to the corresponding values in Table
A.1, Table A.2, Table A.3, Table A.4 of YD/T 3756-2024.
If the LTE-V2X system is pre-configured with synchronization offset indication 1
(syncOffsetIndicatorl-r14), synchronization offset indication 2 (syncOffsetIndicator2-
r14) or synchronization offset indication 3 (syncOffsetIndicator3-r14) in YD/T 3340-
2018, these three parameters shall not take effect.
7.1.2 PC5 interface transmitter requirements
7.1.2.1 The LTE-V2X system shall use broadcast mode to send service data.
7.1.2.2 The LTE-V2X system shall support data transmission using transmission mode
4. When sending service data, it should use a resource selection method of perception
plus semi-persistent scheduling.
Note: Transmission mode 4 refers to the autonomous resource selection of the terminal (user
equipment); the terminal perceives the occupation of PC5 resources by listening.
7.1.2.3 The 3-bit SDU (service data unit) type of the PDCP header shall be set to 011;
a 16-bit PDCP SN shall be used. The PGK (proximity service group key) identifier,
PTK (proximity service key) identifier and PDCP SN shall be set to 0.
7.1.2.4 When the LTE-V2X system uses PC5 to send service data, RLC UM
(unacknowledged mode) shall be used; a 5-bit RLC SN shall be used.
7.1.2.5 The 4-bit V field of the MAC header shall be set to 0011.
7.2 Network layer configuration requirements
7.2.1 PC5 interface transmitter requirements
The packet transmission behavior shall meet the following requirements.
a) The adaptation layer randomly generates and maintains the 24 bit Source_Layer-
2 ID within the range of [0x010001, 0xFFFFFE]. If the Application layer ID
changed parameter appears in ADAPTATION-LAYER.request, the adaptation
layer randomly generates and maintains the 24-bit Source_Layer-2 ID in the
range [0x010001, 0xFFFFFE] again. The adaptation layer indicates the
condition is first met; the sending of the original BSM shall be canceled. The BSM shall
contain all valid critical event flags up to the data encapsulation time. During the
validity period of the trigger condition, the critical event trigger BSM shall be generated
continuously according to the generation cycle of 100 ms, starting from the generation
time of the above first critical event trigger BSM. After a specific trigger condition is
invalid, the corresponding critical event flag carried in the BSM shall be canceled.
Note: For an example of sending a critical event trigger BSM, see Appendix B.
The application layer of the LTE-V2X system shall perform congestion control on the
regular BSM. The congestion control mechanism is shown in Appendix C.
7.3.1.4 Priority setting
When sending a regular BSM, the LTE-V2X system shall set the priority parameter
Priority in the network layer DSM.request primitive to 112.
When sending a critical event-triggered BSM, the LTE-V2X system shall set the
priority parameter Priority in the network layer DSM.request primitive to 208.
7.3.1.5 Packet delay budget (PDB) setting
For the transmission of regular BSM, the PDB should be set to 100 ms; for the
transmission of critical event-triggered BSM, the PDB should be set to 50 ms.
7.3.1.6 Calling the underlying transmission service
The LTE-V2X system shall call the network layer DSM.request primitive to send BSM
and meet the following requirements:
a) It shall be sent in broadcast mode;
b) The AID parameter shall be set according to Table 7;
c) The Network Protocol Type parameter shall be set to 4;
d) The Priority parameter shall be set according to 7.3.1.4;
e) The traffic period Traffic Period parameter can be set to the current BSM
generation period of the application layer;
f) When changing the pseudonym certificate according to 7.4.5.2, the Application
layer ID changed parameter shall be set.
to Table 7; the generationTime field shall be filled with the generation time of the SPDU;
the generationLocation field shall not be filled; the fields expiryTime,
p2pcdLearningRequest, missingCrlIdentifier, encryptionKey, inlineP2pcdRequest,
requestedCertificate, pduFunctionalType are optional fields and are not filled by default.
7.4.3.5 Signer (signer)
The signer field shall be selected as digest or certificate; it shall not be selected as self
or x509 and shall meet the following requirements.
a) When certificate is selected, the SIZE of SEQUENCE is 1, that is, the certificates
of other certificate authorities in the certificate chain are not attached.
b) Attach a complete pseudonym certificate in the following cases (select certificate);
attach a digest of the pseudonym certificate in other cases (select digest):
1) The first BSM sent after the start/restart operation;
2) The first BSM sent after the pseudonym certificate used is changed;
3) The time interval between this BSM and the previous BSM with a complete
pseudonym certificate attached is equal to or greater than 450 ms;
4) At least one key event flag in Table 26 is set.
7.4.3.6 Signature value (signature)
The signature field shall be selected as sm2Signature; the input and output of the
cryptographic algorithm shall comply with the requirements of D.2 in YD/T 3957-2021.
7.4.4 Security layer message reception requirements
The LTE-V2X system shall verify the received security layer SPDU. The verification
content shall meet the relevant requirements of 6.1.9.3 in YD/T 3957-2021.
For the received safety layer SPDU, if its generationTime is 1 s earlier than the current
LTE-V2X system time or later than the current LTE-V2X system time, it shall be
regarded as invalid data and discarded.
Note: generationTime is the reference time in YD/T 3957-2021.
7.4.5 Privacy protection requirements
7.4.5.1 Identifier randomization
The LTE-V2X system shall randomize the relevant identifiers in the BSM signed with
the pseudonym certificate and meet the following requirements:
a) After the startup/restart operation, the 24-bit Source_Layer-2 ID of the first BSM
sent shall be randomly initialized according to 7.2.1;
b) If the pseudonym certificate used by this BSM is different from that used by the
previous BSM, the 24-bit Source_Layer-2 ID of this BSM shall change randomly
according to 7.2.1;
c) If the pseudonym certificate used by this BSM is different from that used by the
previous BSM, the DE_MsgCount and id of this BSM shall change randomly
according to 7.3.2.1 and 7.3.2.2.
7.4.5.2 Pseudonym certificate replacement
The LTE-V2X system shall not use expired pseudonym certificates.
Each time the LTE-V2X system starts/restarts, when sending the first BSM, a certificate
shall be randomly selected from all valid pseudonym certificates for signing the
message, meanwhile the continuous use time of the pseudonym certificate shall be reset.
During the validity period of the certificate, the continuous use time of the same
pseudonym certificate shall not exceed 300 s except in the following cases:
a) If the straight-line distance between the current position of the LTE-V2X system
and the position at the previous pseudonym certificate change is less than 2100 m
(with an allowable error of 100 m), the LTE-V2X system shall continue to use the
existing pseudonym certificate (except for the case where the power is turned off
and on after the previous pseudonym certificate is changed);
b) If at least one of the key event flags DE_VehicleEventFlags defined in Table 26
is set, the LT...