GB/T 31024.2-2014 PDF English
US$760.00 · In stock · Download in 9 secondsGB/T 31024.2-2014: Cooperation of roadside to vehicle - Dedicated short range communications - Part 2: Specification of medium access control layer and physical layer Delivery: 9 seconds. True-PDF full-copy in English & invoice will be downloaded + auto-delivered via email. See step-by-step procedureStatus: Valid
| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivery | Name of Chinese Standard | Status |
| GB/T 31024.2-2014 | English | 760 |
Add to Cart
|
0-9 seconds. Auto-delivery
|
Cooperation of roadside to vehicle - Dedicated short range communications - Part 2: Specification of medium access control layer and physical layer
| Valid |
Excerpted PDFs (Download full copy in 9 seconds upon purchase)PDF Preview: GB/T 31024.2-2014
GB/T 31024.2-2014: Cooperation of roadside to vehicle - Dedicated short range communications - Part 2: Specification of medium access control layer and physical layer
---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/GBT31024.2-2014
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 35.100
L 79
Cooperation of roadside to vehicle - Dedicated short
range communications - Part 2.Specification of
medium access control layer and physical layer
Issued on. AUGUST 05, 2014
Implemented on. FEBRUARY 01, 2015
Issued by. General Administration of Quality Supervision, Inspection and
Quarantine;
Standardization Administration of the People's Republic of
China.
Table of Contents
Foreword... 4
Introduction... 5
1 Scope... 6
2 Terms and definitions... 6
3 Abbreviations... 8
4 System reference model... 11
5 Medium access control layer of communication mode with center node... 12
6 Medium access control frame formats of communication mode with center
node... 17
7 Functions of medium access control layer of communication mode with center
node... 43
8 Medium access control layer of communication mode without center node 79
9 Physical layer of communication mode with center node... 83
10 Physical layer of communication mode without center node... 125
Annex A (informative) Patent information involved in this Part... 133
Annex B (normative) Modulation and coding scheme parameters... 135
Annex C (normative) Demodulation pilot pattern... 136
Annex D (normative) Sounding pilot pattern... 137
Annex E (normative) Check matrix of low-density parity check code... 138
Bibliography... 144
1 Scope
This Part of GB/T 31024 specifies the technical requirements for medium
access control layer and physical layer of dedicated short-range
communications of cooperation of roadside to vehicle, including system
reference model, MAC layer frame format and MAC layer function of
communication mode with center node, MAC layer frame format and function
of communication mode without center node, physical layer parameters and
functions of communication mode with center node, physical layer parameters
and functions of communication mode without center node.
This Part is applicable to the wireless communication equipment between
vehicles of cooperative intelligent transportation system as well as the wireless
communication equipment between vehicle and road infrastructure.
2 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
2.1 MAC protocol data unit; MPDU
A data unit that is exchanged between two equivalent MAC entities by using
PHY layer service.
2.2 MAC management protocol data unit
A data unit that is exchanged between two equivalent MAC entities to
implement the MAC management protocol.
2.3 MAC service data unit
The information that is delivered as a unit between MAC service access points
(SAP).
3 Abbreviations
The following abbreviations apply to this document.
ACK. Acknowledgement
ARQ. Automatic Repeat Request
BCC. Binary Convolutional Code
BCF. Broadcasting Control Frame
BFM. Beamforming Matrix
BOBUID. Broadcasting OBUID
BPSK. Binary Phase Shift Keying
4 System reference model
See Figure 1 for the system reference model. The main functions of each layer
are as follows.
5 Medium access control layer of communication mode with center node
5.1 Overview
MAC layer is used to manage and control the allocation and sharing of physical
layer transmission resources between multiple users. See Figure 2 for the
function composition.
5.2 Adaptation sublayer
MAC layer is divided into adaptation sublayer and MAC sublayer. The
adaptation sublayer uses the services provided by MAC sublayer. The functions
of the adaptation sublayer are as follows.
5.3 Medium access control sublayer
The basic functions of the MAC sublayer are divided into the management
control plane and the data plane.
6 Medium access control frame formats of
communication mode with center node
6.1 Common medium access control frame format
6.1.1 Overview of common medium access control frame format
See Figure 4 for the frame format of MAC protocol data unit (MPDU). Every
MPDU can be divided into three parts.
6.1.2 Frame control field
6.1.2.1 Description of frame control field
The frame control field contains the following fields. protocol version, frame type,
subtype, flow identification (FID), retransmission indication, and reservation.
6.1.2.2 Protocol version field
The protocol version field length is 2 bits. And the length and position remain
the same in all revisions of this Part. The protocol version value in this Part is
0, all other values are reserved.
6.1.4 Sequence number field
The length of sequence number field is 12 bits. The value ranges from 0~4095.
It is used to indicate the sequence number of MSDU / MMPDU. All MSDUs /
MMPDUs sent in an FID flow are assigned a sequence number.
6.1.5 Reservation
The reservation field is 3 bits. The default setting is 0.
6.2 Data frame
6.2.1 Overview of data frame
See Figure 6 for the frame format of data frame.
6.2.2 Reserved field
The length of this filed is 1 bit. The default setting is 0.
7 Functions of medium access control layer of
communication mode with center node
7.1 Adaptable sublayer
The function of the adaptable sublayer is to classify the IP layer data and use
an FID to identify a service flow.
7.2 Medium access control sublayer
7.2.1 Address searching and connection
OBU and RSU both have a 48-bit globally-unique MAC address as identification.
This address is used for mutual acknowledgement and network packet
forwarding during the network access phase.
7.2.2 Medium access control address
Both OBU and RSU use a globally-unique 48-bit MAC address as the identifier.
7.2.3 Broadcast on board unit identification
The BOBUID length is 12 bits. Value range is. 0x000 and 0x001.It is used to
broadcast to all OBUs within the scope of this RSU.
7.3 Network access process of on board unit
7.3.1 Overview
The network access process refers to the process by which OBU discovers the
network and establishes a connection with RSU. The network access includes
the following steps.
7.9 Frame acknowledgement
This clause uses ACK frame or GroupACK frame for frame acknowledgement.
For management control frames, the unicast management control frames
without corresponding response frames need to use ACK or GroupACK to
conduct acknowledgement. Otherwise, it shall directly use the corresponding
response frame for acknowledgement. See Table 25 for the corresponding
response frames.
8 Medium access control layer of communication mode without center node
8.1 Description of medium access control layer of communication
mode without center node
The communication mode without center node directly transmits message
between vehicles.
8.2 Medium access control layer frame structure of communication
mode without center node
8.2.1 Overview
See Figure 54 for the frame format of MAC layer of the communication mode
without center node. The MAC frame can be divided into three parts. The first
part is the fixed-length MAC header. The second part is the data carried in the
MAC frame.
8.2.3 Hop indication field
The hop count indication field contains 8 bits, as shown in Figure 56.The first
four bits indicate the number of hops in the current frame. From 0000 to 1111,
it indicates the 0th to the 15th hops. The last four bits indicate the maximum hop
limit. From 0000 to 1111, it indicates that the maximum hop limit is the 0th to the
15th hops.
8.2.5 Serial number field
The serial number field is 8 bits long. The value range is 0~255, used to indicate
the sequence number of MSDU / MMPDU.
8.2.6 Length indication field
The length indication field has 12 bits in total, used to indicate the length of the
following data field.
8.2.7 Reserved field
The reserved filed is 8 bits. The default setting is 0.
8.2.8 Data field
The data field length is variable. The minimum data length is 0 byte. The
maximum data length is 4095 bytes.
9 Physical layer of communication mode with center node
9.1 Basic parameters for frame structure and orthogonal frequency division complex
9.1.1 Frame structure
See Figure 57 for the frame structure of the physical layer.
9.1.3 Symbols of physical layer
See Table 30 for the definitions of relevant symbols of physical layer in this Part.
9.2 Transmitter block diagram and signal processing flow
9.2.1 Transmitter block diagram
See Figure 59 for RSU side transmitter block diagram.
9.2.3 Channel coding
9.2.3.1 Overview
The channel coding module performs FEC protection on the scrambled data bit
sequence. This Part supports two types of forward error
correction codes. convolutional coding and LDPC coding.
......
Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al.
Tips & Frequently Asked QuestionsQuestion 1: How long will the true-PDF of English version of GB/T 31024.2-2014 be delivered?Answer: The full copy PDF of English version of GB/T 31024.2-2014 can be downloaded in 9 seconds, and it will also be emailed to you in 9 seconds (double mechanisms to ensure the delivery reliably), with PDF-invoice. Question 2: Can I share the purchased PDF of GB/T 31024.2-2014_English with my colleagues?Answer: Yes. The purchased PDF of GB/T 31024.2-2014_English will be deemed to be sold to your employer/organization who actually paid for it, including your colleagues and your employer's intranet. Question 3: Does the price include tax/VAT?Answer: Yes. Our tax invoice, downloaded/delivered in 9 seconds, includes all tax/VAT and complies with 100+ countries' tax regulations (tax exempted in 100+ countries) -- See Avoidance of Double Taxation Agreements (DTAs): List of DTAs signed between Singapore and 100+ countriesQuestion 4: Do you accept my currency other than USD?Answer: Yes. www.ChineseStandard.us -- GB/T 31024.2-2014 -- Click this link and select your country/currency to pay, the exact amount in your currency will be printed on the invoice. Full PDF will also be downloaded/emailed in 9 seconds. How to buy and download a true PDF of English version of GB/T 31024.2-2014?A step-by-step guide to download PDF of GB/T 31024.2-2014_EnglishStep 1: Visit website https://www.ChineseStandard.net (Pay in USD), or https://www.ChineseStandard.us (Pay in any currencies such as Euro, KRW, JPY, AUD).
Step 2: Search keyword "GB/T 31024.2-2014".
Step 3: Click "Add to Cart". If multiple PDFs are required, repeat steps 2 and 3 to add up to 12 PDFs to cart.
Step 4: Select payment option (Via payment agents Stripe or PayPal).
Step 5: Customize Tax Invoice -- Fill up your email etc.
Step 6: Click "Checkout".
Step 7: Make payment by credit card, PayPal, Google Pay etc. After the payment is completed and in 9 seconds, you will receive 2 emails attached with the purchased PDFs and PDF-invoice, respectively.
Step 8: Optional -- Go to download PDF.
Step 9: Optional -- Click Open/Download PDF to download PDFs and invoice.
See screenshots for above steps: Steps 1~3 Steps 4~6 Step 7 Step 8 Step 9
|