WO2014090131A1 - 基于车载网络的安全信息传输方法 - Google Patents
基于车载网络的安全信息传输方法 Download PDFInfo
- Publication number
- WO2014090131A1 WO2014090131A1 PCT/CN2013/088949 CN2013088949W WO2014090131A1 WO 2014090131 A1 WO2014090131 A1 WO 2014090131A1 CN 2013088949 W CN2013088949 W CN 2013088949W WO 2014090131 A1 WO2014090131 A1 WO 2014090131A1
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- Prior art keywords
- security information
- information
- transmitting
- interval
- segment
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Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
- H04W4/80—Services using short range communication, e.g. near-field communication [NFC], radio-frequency identification [RFID] or low energy communication
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
- H04W4/30—Services specially adapted for particular environments, situations or purposes
- H04W4/40—Services specially adapted for particular environments, situations or purposes for vehicles, e.g. vehicle-to-pedestrians [V2P]
- H04W4/46—Services specially adapted for particular environments, situations or purposes for vehicles, e.g. vehicle-to-pedestrians [V2P] for vehicle-to-vehicle communication [V2V]
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W48/00—Access restriction; Network selection; Access point selection
- H04W48/08—Access restriction or access information delivery, e.g. discovery data delivery
- H04W48/12—Access restriction or access information delivery, e.g. discovery data delivery using downlink control channel
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L67/00—Network arrangements or protocols for supporting network services or applications
- H04L67/01—Protocols
- H04L67/12—Protocols specially adapted for proprietary or special-purpose networking environments, e.g. medical networks, sensor networks, networks in vehicles or remote metering networks
Definitions
- the invention belongs to the field of in-vehicle wireless network communication, and relates to a method for transmitting safety information, in particular to a method for transmitting safety information based on an in-vehicle network. Background technique
- In-vehicle network communication can improve vehicle driving comfort and reduce traffic accidents, which has become an inevitable trend in the development of modern automotive electronic technology.
- In-vehicle network communication is also the core technology for implementing Intelligent Transportation System (ITS).
- WAVE Wireless Access in Vehicular Environments
- DSRC is a technology dedicated to vehicle communication in the world.
- IEEE 802.11p mainly specifies the Media Access Control Layer (MAC) and Physical Layer (PHY) standards of the DSRC protocol.
- the IEEE 1609 standard It is a high-level standard based on the 802.11p communication protocol. It is a communication system architecture defined by the application of wireless communication technology in the vehicle environment and a series of standardized services and interfaces.
- the DSRCAVAVE device operates in the 5.9G band, and the working frequency band occupies 75MHz. 5MHz is the guard band. The remaining 70MHz is divided into 7 10MHz channels, including one control channel (CCH) and six service channels (service). Channel, referred to as SCH). The time is divided into 50ms of control channel intervals (CCHI) and 50ms of service channel intercals (SCHI). As shown in Figure 1, the DSCH/WAVE synchronization interval, a CCH interval period and an SCH interval period (100ms) form a synchronization interval. The CCH interval and the SCH interval are separated by a 4ms guard interval (GI). Used to complete channel switching.
- GI guard interval
- CCH channel transmission management information such as WAVE service announcements and high priority vehicle safety information such as collision warning and emergency braking
- SAE J2735 standard recommends that such high priority information has a transmission delay of less than 10ms.
- WAVE requires that all devices must listen to CCH within the CCH interval.
- non-secure information is transmitted through the SCH interval.
- a single channel device In order to transmit non-secure information, a single channel device has to switch from the CCH channel to any one of the SCH channels within the SCH interval. The security information to be sent can only be transmitted on the CCH channel until the next CCH interval arrives. This may introduce a large delay for delay-sensitive security information transmission.
- the node vehicle becomes a relay vehicle and receives broadcast information from the source. Then, each relay vehicle that receives the safety information repeats broadcasting on other channels (channels other than 'current channel' and 'next channel')
- the information is transmitted in the format of the security information as shown in Figure 2.
- the patent In order to ensure that all vehicles running on any channel can be in the SCH Receiving the security information within the compartment, the patent must repeat the same security information broadcast on all channels, which will inevitably lead to a great loss of resources.
- an object of the present invention is to provide a security information transmission method based on an in-vehicle network, which is used to solve the problem that the security information transmission delay is too long in the prior art, and the transmission efficiency is low, and cannot be in the SCH.
- the problem of sending and receiving security information is to provide a security information transmission method based on an in-vehicle network, which is used to solve the problem that the security information transmission delay is too long in the prior art, and the transmission efficiency is low, and cannot be in the SCH.
- the present invention provides a security information transmission method based on an in-vehicle network, the security information transmission method being applied to a vehicle-to-vehicle communication including a sender and a receiver, the security information transmission method package Includes:
- the step S1 further includes: designating a temporary security information transmission channel for the service channel interval, and adding temporary security information transmission channel information to the wireless access service announcement information in the conventional vehicle environment.
- the step S2 further includes:
- the remaining packet marking is added to the first segment in order to prove that the remaining time of the control channel interval cannot completely transmit the entire security information.
- the temporary security information transmission channel information is added to the radio access service announcement information in the conventional in-vehicle environment to constitute the radio access service announcement information in the shortened in-vehicle environment.
- the service channel is capable of transmitting both secure information and non-secure information.
- the radio access service announcement information and high priority security information can be propagated within a control channel interval.
- the information content of the temporary security information transmission channel includes a channel ID.
- a temporary secure information transmission channel is designated for transmitting the remaining security information.
- analyzing the remaining transmittable bytes within the control channel interval indicates that the security information cannot be completely transmitted within the control channel interval.
- the security information transmission method based on the vehicle network according to the present invention has the following beneficial effects: 1.
- the safety information transmission delay is greatly reduced;
- Figure 1 shows a schematic diagram of the synchronization interval for a dedicated short-range communication technology/wireless access system.
- Figure 2 shows a schematic diagram of the security information format transmitted during the service channel interval.
- Figure 3 shows a schematic diagram of a scene in which a car collides on a highway.
- FIG. 4 is a flow chart showing a method for transmitting safety information based on an in-vehicle network according to the present invention.
- FIG. 5a is a schematic diagram showing a frame format of radio access service announcement information in a conventional in-vehicle environment carrying temporary security information transmission channel information in an in-vehicle network-based security information transmission method according to the present invention.
- FIG. 5b is a schematic diagram showing a frame format of the wireless access service announcement information in the shortened vehicle-mounted environment in the method for transmitting safety information based on the in-vehicle network of the present invention.
- Fig. 6 is a flow chart showing the step S2 in the method for transmitting safety information based on the in-vehicle network of the present invention. detailed description
- the present invention differs from US 2011/0128902 in that US Patent US 2011/0128902 is required at all
- the security information is repeatedly transmitted on the SCH, and the present invention can transmit the security information by using the CCH interval as much as possible. If the security information cannot be completely transmitted on the CCH, all the vehicles are notified to receive the remaining security information on any given SCH (the information format is as shown in FIG. 5a). Or FIG. 5b), meanwhile, the vehicle receiving the remaining safety information temporarily does not compete for resources in the SCH interval until the remaining safety information transmission is completed.
- information is propagated through network nodes.
- Information is mainly divided into management information, security information and non-security information.
- the management information and the security information are transmitted on a control channel (CCH) control channel (CCH), and the non-security information is in service channel intervals.
- SCHI is transmitted on a service channel (SCH).
- the method for transmitting safety information based on the vehicle network according to the present invention requires the vehicle network to satisfy two assumptions:
- the vehicle sender can divide a piece of security information into two packet segments for independent transmission.
- the embodiment provides a security information transmission method based on an in-vehicle network, and the security information transmission method is applied to vehicle-to-vehicle communication including a sender and a receiver, as shown in FIG.
- Information transmission methods include:
- the step further includes specifying a temporary security information transmission channel for the SCH interval, and adding the temporary security information transmission channel information to the wireless connection in the conventional vehicle environment.
- the transmission channel specified here may be any one of the SCH channels.
- the SCH channel is capable of transmitting both secure and non-secure information.
- the temporary security information transmission channel information is added to the radio access service announcement information in a conventional in-vehicle environment, and constitutes a shortened in-vehicle environment radio access service announcement information as shown in FIG. 5b.
- the content of the temporary security information transmission channel information may be very simplified, for example, only the channel ID is included.
- the frame format of the radio access service announcement information in the shortened in-vehicle environment as shown in FIG. 5b can be used to propagate temporary security information transmission channel information.
- the vehicle receiving the temporary safety information transmission channel information switches to the designated SCH channel within a subsequent SCH interval (which may include one SCH interval and possibly multiple SCH intervals). In the SCH interval, at all After the vehicle switches to the same SCH channel, the security information can be successfully transmitted and received within the SCH interval.
- the security information can be completely transmitted within the CCH interval. If the remaining time cannot fully transmit a security message, the sender will wait for the next CCH interval to continue and continue transmission. Since the security information cannot be completely transmitted, it can only wait for the next CCH interval to arrive.
- a temporary secure information transmission channel is designated for transmitting the remaining security information.
- step S2 After receiving the WSA information carrying the temporary security information transmission channel, sending the security information, and analyzing how many bytes are available in the CCH interval, which indicates that the security information cannot be completely transmitted within the CCH interval, and the security information is divided into Adding a first segment of the remaining packet tag and a second segment without adding a remaining packet tag, and transmitting the first segment to the receiver in a CCH interval, and transmitting the second segment to the receiving in a serving channel interval square.
- the specific step S2 is shown in Figure 6, including:
- All vehicles switch to the temporary security information transmission channel in the SCH interval in the guard interval, and the sender does not perform resource competition, and directly transmits the remaining security information to the receiver, that is, the second fragment without adding the remaining packet label.
- all receivers suspend channel contention and receive the remaining pieces of security information.
- the security information transmission method based on the vehicle network first greatly reduces the security information transmission delay.
- the network is able to generate security information during the SCH interval. If the security information is generated within the CCH interval, but the information cannot be completely transmitted during the remaining time of the CCH interval, its transmission delay is at least 54ms (including the guard interval) according to the existing protocol standard.
- the time slot of the network is lms.
- the security interval is discarded, the security information is able to
- the present invention can speed up the transmission of safety information and reduce the delay. Second, mitigate the probability of collision and further reduce the transmission delay.
- the information source sender transmits part of the security information carrying the remaining packet tag, and after the channel switching, the sender switches to the designated temporary security information transmission channel, Continue to transfer the remaining security information.
- all receivers can The initial phase of the SCH interval suspends resource competition and reduces the probability of collision.
- the present invention makes full use of the CCH interval to transmit security information, and minimizes the number of bytes of security information transmitted within the SCH interval. This further reduces the transmission delay of the security information.
- the present invention improves spectral efficiency.
- the present invention requires that security information be transmitted only over a designated temporary secure information transmission channel when transmitted within the SCH interval. Security information does not need to be broadcast repeatedly on multiple channels. This improves spectral efficiency.
- the present invention effectively overcomes various shortcomings in the prior art and has high industrial utilization value.
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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Computer Security & Cryptography (AREA)
- Mobile Radio Communication Systems (AREA)
- Health & Medical Sciences (AREA)
- Computing Systems (AREA)
- General Health & Medical Sciences (AREA)
- Medical Informatics (AREA)
Abstract
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US14/652,113 US9756638B2 (en) | 2012-12-14 | 2013-12-10 | Method for transmitting security information based on vehicular network |
Applications Claiming Priority (2)
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CN201210545980.4A CN103873177B (zh) | 2012-12-14 | 2012-12-14 | 基于车载网络的安全信息传输方法 |
CN201210545980.4 | 2012-12-14 |
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WO2014090131A1 true WO2014090131A1 (zh) | 2014-06-19 |
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PCT/CN2013/088949 WO2014090131A1 (zh) | 2012-12-14 | 2013-12-10 | 基于车载网络的安全信息传输方法 |
Country Status (3)
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US (1) | US9756638B2 (zh) |
CN (1) | CN103873177B (zh) |
WO (1) | WO2014090131A1 (zh) |
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WO2017030887A1 (en) * | 2015-08-19 | 2017-02-23 | Qualcomm Incorporated | Safety event message transmission timing in dedicated short-range communication (dsrc) |
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US9848420B2 (en) * | 2015-04-01 | 2017-12-19 | GM Global Technology Operations LLC | Method and apparatus of dynamic Wi-Fi multi-channel switch based on data traffic context |
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JP6394539B2 (ja) * | 2015-08-26 | 2018-09-26 | 株式会社デンソー | 移動体通信システム、サービス提供装置 |
JP6406194B2 (ja) * | 2015-09-17 | 2018-10-17 | 株式会社デンソー | 通信装置 |
CN105915654A (zh) * | 2016-06-28 | 2016-08-31 | 中国联合网络通信集团有限公司 | 一种多信道轮询消息接收方法及终端、区域控制器和系统 |
CN106231682A (zh) * | 2016-08-05 | 2016-12-14 | 南京理工大学 | 一种车载自组织网安全信号传输机制的优化方法 |
WO2018097371A1 (ko) * | 2016-11-28 | 2018-05-31 | 엘지전자(주) | V2x 통신을 위한 장치 및 방법 |
WO2018110729A1 (ko) * | 2016-12-14 | 2018-06-21 | 엘지전자(주) | V2x 통신을 위한 장치 및 방법 |
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CN113950026B (zh) * | 2021-12-22 | 2022-03-22 | 交通运输部公路科学研究所 | 一种车载无线网络多通道精准同步方法 |
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KR20180042244A (ko) * | 2015-08-19 | 2018-04-25 | 퀄컴 인코포레이티드 | 단거리 전용 통신 (dsrc) 에서의 안전 이벤트 메시지 송신 타이밍 |
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Also Published As
Publication number | Publication date |
---|---|
US9756638B2 (en) | 2017-09-05 |
US20150305038A1 (en) | 2015-10-22 |
CN103873177A (zh) | 2014-06-18 |
CN103873177B (zh) | 2016-08-03 |
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