GB/T 31024.3-2019 PDF English
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Cooperative intelligent transportation systems -- Dedicated short range communications -- Part 3: Network layer and application layer specification
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GB/T 31024.3-2019: Cooperative intelligent transportation systems -- Dedicated short range communications -- Part 3: Network layer and application layer specification
---This is an excerpt. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.), auto-downloaded/delivered in 9 seconds, can be purchased online: https://www.ChineseStandard.net/PDF.aspx/GBT31024.3-2019
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 35.100
L 79
Cooperative intelligent transportation systems -
Dedicated short range communications - Part 3.
Network layer and application layer specification
Issued on. MAY 10, 2019
Implemented on. DECEMBER 1, 2009
Issued by. General Administration of Quality Supervision, Inspection and
Quarantine;
Standardization Administration of the People’s Republic of
China.
Table of Contents
Foreword... 3
1 Scope... 4
2 Normative references... 4
3 Terms and definitions... 4
4 Abbreviations... 5
5 Technical requirements of network layer... 5
6 Interactive data set of application layer... 30
Annex A (Informative) Classification and value of Protocol Type... 104
Annex B (Informative) Preferred AID port number allocation... 105
Annex C (Informative) MIB message... 106
Annex D (Informative) Example of source/destination address design for
adaptation layer... 108
Bibliography... 110
1 Scope
This part of GB/T 31024 specifies the technical requirements of network layer and
application layer for dedicated short range communication of cooperative intelligent
transportation system.
This part is applicable to the design and development of network layer and application
layer for dedicated short range communication of cooperative intelligent transportation
system.
2 Normative references
The following referenced documents are indispensable for the application of this
document. For dated references, only the edition cited applies. For undated references,
the latest edition of the referenced document (including any amendments) applies.
GB 5768.2 Road traffic signs and markings - Part 2.Road traffic signs
GB 14886 Specifications for road traffic signal setting and installation
GB/T 16262.1 Information technology - Abstract Syntax Notation One (ASN.1) - Part 1.
Specification of basic notation
GB/T 16262.2 Information technology - Abstract Syntax Notation One (ASN.1) - Part 2.
Information object specification
GB/T 16262.3 Information technology - Abstract Syntax Notation One (ASN.1) - Part 3.
Constraint specification
GB/T 16262.4 Information technology - Abstract Syntax Notation One (ASN.1) - Part 4.
Parameterization of ASN.1 specifications
GB/T 16263.2 Information technology - ASN.1 encoding rules - Part 2.Specification of
Packed Encoding Rules (PER)
GB 25280 Road traffic signal controller
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
3.1
dedicated short range communication
wireless communication method for short range communication among traffic elements
such as vehicles, infrastructures and pedestrians
3.2
dedicated short range communication management entity
a universal set of dedicated short range communication management services that
provides management interfaces for all data layer entities
3.3
management information base
an entity used to store application configuration and status information
4 Abbreviations
For the purposes of this document, the following abbreviations apply.
AID Application ID
DME DSRC Management Entity
DSA DSRC Service Advertisement
DSM DSRC Short Message
DSMP DSRC Short Message Protocol
DSRC Dedicated Short Range Communication
GNSS Global Navigation Satellite System
IP Internet Protocol
LLC Logical Link Control
LTE Long Term Evolution
LTE-V2X LTE Vehicle to Everything
MAC Media Access Control
MIB Management Information Base
SAP Service Access Point
TCP Transmission Control Protocol
UDP User Data Protocol
UPER Unaligned Packet Encoding Rules
5 Technical requirements of network layer
5.1 Network layer framework
The DSRC network layer framework of cooperative intelligent transportation system is
shown in Figure 1.
5.2 Technical requirements of data sublayer
5.2.1 General
The data sublayer in the DSRC network layer of the cooperative intelligent transportation
system comprises TCP/UDP, IP, DSMP and adaptation layer, wherein the IP protocol and
the TCP/UDP protocol are not within the definition of this part.
5.2.2 Adaptation layer
The adaptation layer provides the transmission adaptation function between the
underlying access technology and the upper layer protocol stack. The adaptation layer
receives the DSMP data packet, the IP data packet, or the DME data packet sent by the
upper layer, distinguishes the underlying access technology used by the data packet to be
sent, and delivers the corresponding data packet to the bottom layer in line with the
corresponding access technology for transmission;
5.2.3 DSMP
5.2.3.1 DSM data frame format
The layer-by-layer packaging process of DSM is shown in Figure 5.
5.3 Technical requirements of management sublayer
5.3.1 Application registration
Before using management sublayer services, the application needs to be registered with
the DME first. An application running on a DSRC device needs to be registered as a user
application, so that the DME can send the received DSM to the corresponding application.
5.3.2 Service management
Service management belongs to the internal operation of the device, and the
corresponding functions are optional. When an application issues a service usage request
to the DME, the DME will initialize the requested service. An example of the service
management process is shown in Figure 7.
5.3.3 MIB maintenance
The MIB operation process is shown in Figure 8.The MIB is responsible for management
and maintenance of the application configuration and status information of the DSRC
modules of the cooperative intelligent transportation system. The DME sets and queries
the MIB information through specified signaling. After receiving a service request
message, the DME establishes a MIB information table corresponding to the service in the
MIB.
5.4 Access point and service primitive
5.4.1 Service Access Point (SAP)
The SAP of the DSRC network layer is shown in Figure 10.
5.4.2 Access layer service primitive
5.4.2.1 ACCESS-LAYER.request
ACCESS-LAYER.request is used to send the access data requested by the upper layer.
Service primitive parameters.
given in the underlying standard.
5.4.2.2 ACCESS-LAYER.indication
ACCESS-LAYER.indication is used to indicate that the upper layer has received the
access data.
5.4.3 Adaptation layer service primitive
5.4.3.1 ADAPTATION-LAYER.request
ADAPTATION-LAYER.request is used to send the adaptation layer data requested by the
upper layer.
5.4.4 DSM service primitive
5.4.4.1 DSM.request
DSM.request is used by the upper layer to request to send the DSM data.
Service primitive parameters.
The DSM.request service primitive parameters are shown in Table 11.
6 Interactive data set of application layer
6.1 Basic requirements
Interactive data set of application layer is defined according to ASN.1, its basic notation
specification is based on GB/T 16262.1, information object specification is based on GB/T
16262.2, constraint specification is based on GB/T 16262.3, and parameterization of
ASN.1 specifications is based on GB/T 16262.4.
The encoding method of interactive data set of application layer is defined according to
GB/T 16263.2, adopting Unaligned Packet Encoding Rules (UPER).
6.2 Definition of data set
6.2.1 General
The interactive data set of application layer is established by following the multilevel
nested logic of "message set-data frame-data element".
The message set is packaged in a uniform frame format, as a basic unit of application
layer interaction. This part defines five message types, with each message consisting of
the combination of data frame and data element.
6.2.2 Message set
6.2.2.1 General provisions
The message set consists of frame format and packaged message body in the frame.
6.2.3 Data frame
6.2.3.1 General provisions
The data frame is substantial information combination, composed of other data frames or
data units.
6.2.3.2 DF_AccelerationSet4Way
It defines the 4-axis acceleration of the vehicle. Specific contents are as follows.
6.2.3.3 DF_BrakeSystemStatus
It defines the brake system status of the vehicle, including the following 7 different types of
status.
6.2.3.4 DF_ConnectingLane
It defines the downstream lane to which a lane at the intersection connects, including
downstream lane ID and the allowable driving behavior at the turning.
6.2.3.5 DF_Connection
It defines the connection between the lane at the intersection and the lane in the
downstream link. The exit node ID of downstream link, the basic information of connecting
lane in the downstream link, and the corresponding signal phase No. are included.
6.2.3.6 DF_ConnectsToList
It defines the list of connection between the turnings of each lane at the intersection and of
the lane in the downstream link.
6.2.3.43 DF_positionConfidenceSet
It defines the comprehensive confidence of the position (latitude, longitude and elevation).
6.2.3.44 DF_PositionOffsetLL
It defines latitude and longitude offset, which is used for describing the relative position of
a coordinate point. 7 description modes of dimension are provided.
6.2.3.45 DF_PositionOffsetLLV
It defines three-dimensional relative position offset (relative latitude, relative longitude and
relative elevation).
6.2.3.46 DF_RegulatorySpeedLimit
It defines speed limit attribute, including speed limit type and the specified speed limit
value.
6.2.3.47 DF_RoadPoint
It defines a position point marked on road, which is described by relative position.
6.2.3.48 DF_SignalState
It defines the attribute and current state of one intersection signal light, including the
current working mode, current time stamp and real-time phase information list of this
signal light.
6.2.3.49 DF_SpeedLimitList
It defines the speed link list of the link or lane.
6.2.3.50 DF_TimeChangeDetails
It defines a complete timing attribute of the phase state of a signal light.
The specific parameters of the data frame have the following meanings.
6.2.3.51 DF_VehicleClassification
It defines the basic vehicle classification.
6.2.3.52 DF_VehicleSafetyExtensions
It defines the set of vehicle safety extension information, which is used as a supplement
for the basic safety data in Msg_BSM message, including vehicle special event states,
vehicle path history, path prediction, exterior light states, etc. Each extension information
is optional.
6.2.3.53 DF_VehicleSize
It defines the vehicle size according to the vehicle length, width and height. Thereinto, the
height value is optional.
6.2.3.54 DF_VerticalOffset
It defines the vertical positional offset, and provides 7 modes for expressing the offset of
dimension range.
6.2.4 Data elements
6.2.4.1 General provisions
Data elements are part of message bodies or data frames, which is generated by basic
data type definition and has actual physical significance.
Considering the consistency with international standards, some data elements are defined
with reference to SAE J2735 and SAE J2945/1.
6.2.4.2 DE_Acceleration
It defines the acceleration of vehicle. The resolution is 0.01 m/s2 and the range is -2 000 to
2 001, where the value 2 001 indicates an invalid value.
6.2.4.3 DE_AlertType
It defines the type of roadside alert information Msg_RSI. The range of values is 0-65 535,
and the value 0 indicates the text description information. The value greater than 0
indicates traffic sign information, which is defined according to GB 5768.2.
6.2.4.4 DE_AllowedManeuvers
It defines the allowed steering maneuvers of (motor vehicle) lane.
6.2.4.5 DE_AntiLockBrakeStatus
It defines the status of Anti-lock Braking System.
6.2.4.6 DE_AuxiliaryBrakeStatus
It indicates the status of Auxiliary Brake System (generally is handbrake).
......
Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al.
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