CN203233545U - A multi-mode wireless communication test platform for vehicle-road coordination - Google Patents

Abstract

The utility model discloses a multi-mode radio communication test platform used for cooperative vehicle infrastructure. The multi-mode radio communication test platform used for cooperative vehicle infrastructure comprises an automobile integration test site, test vehicles, a data service center and a wireless base station, wherein the wireless base station is arranged in the automobile integration test site, a test origin of the automobile integration test site is equipped with one track portal frame, a track is uniformly equipped with track portal frames with intervals of 100m, one side of each track portal frame is equipped with road side equipment, each track portal frame is in connection with the corresponding road side equipment through a wired network, each road side equipment is in connection with the wireless base station through a wireless network, the wireless base station is in connection with the data service center through a wired fiber network, each test vehicle is respectively equipped with a vehicle terminal main control module, and each track portal frame is equipped with a wireless communication module. The multi-mode radio communication test platform used for cooperative vehicle infrastructure can realize research, teaching and testing on a cooperative vehicle infrastructure system.

Description

A multi-mode wireless communication test platform for vehicle-road coordination

technical field

The utility model relates to the technical fields of intelligent traffic systems and wireless communication, in particular to a multi-mode wireless communication test platform for vehicle-road coordination.

Background technique

In order to solve the increasingly serious traffic safety problems and improve the efficiency of transportation, Intelligent Transportation System (ITS) has become a research hotspot at home and abroad in recent years. Vehicle-road coordination, as the most important branch, has received more and more attention. At present, one of the problems facing the research of vehicle-road coordination is: due to the high-speed driving of vehicles, the research on the communication mechanism between vehicles has become a bottleneck restricting the development of vehicle-road coordination systems. Therefore, at this stage, the research momentum of vehicle-vehicle and vehicle-road communication technology is becoming increasingly intense, and three camps centered on the government, research institutions, and automobile companies have been formed.

At present, the communication technologies of the vehicle-road coordination system under research mainly include WLAN, DSRC (WAVE), 2G/3G, LTE, ZigBee, WiMax, etc. Diversified application requirements determine the diversification of communication methods. However, the current research is still in the experimental verification of the above single communication technology, and it is unable to make full use of the advantages of each communication technology to comprehensively improve the stability and accuracy of communication. Therefore, it is very necessary to propose a multi-mode wireless communication test platform for vehicle-road coordination to promote the development of ITS.

Contents of the invention

In view of the defects or deficiencies in the above-mentioned prior art, the purpose of this utility model is to provide a multi-mode wireless communication test platform for vehicle-road coordination, so as to solve the inability to comprehensively and systematically test multiple Test and verify the vehicle-vehicle and vehicle-road communication modes, improve the efficiency of vehicle-road collaborative system research and development, and have the functions of teaching, scientific research platform and experimental platform.

In order to achieve the above object, the utility model takes the following technical solutions:

A multi-mode wireless communication test platform for vehicle-road coordination, including a comprehensive vehicle test site, at least one test vehicle, a data service center and a TD‐LTE4G wireless base station;

The TD-LTE4G wireless base station is arranged in the comprehensive performance test site of the vehicle, and a driveway gantry is installed at the starting point of the test of the comprehensive performance test of the vehicle, and then a driveway gantry is installed at intervals of 100m along the driveway; each driveway A roadside device is installed on one side of the gantry; the driveway gantry is connected to the corresponding roadside device through a wired network, and each roadside device is connected to a TD-LTE 4G wireless base station through a TD-LTE wireless network, and a TD-LTE wireless base station Connect to the data service center through a fiber-optic cable network;

Each test car is equipped with a vehicle-mounted terminal main control module, which is connected with a GPS receiving module, a WAVE communication module, a 3G communication module, a ZigBee communication module, a WiFi communication module and an LTE communication module; each The WAVE receiving module, 3G receiving module, ZigBee receiving node and WiFi hotspot for testing vehicle-road communication are installed on the lane gantry; the test vehicle communicates with the GPS satellite through the GPS receiving module, and communicates with the TD-LTE4G wireless network through the LTE communication module. The base station communicates.

The utility model also includes the following other technical features:

The model of the test vehicle is Changan Ford Focus series sedan, equipped with a vehicle-mounted terminal, the vehicle-mounted terminal uses the Samsung S3C2440 chip as the main control module, the GPS receiving module uses the It520 chip, the WAVE communication module uses the ZW0301 chip, and the 3G communication module uses the MC703 chip. The Zigbee communication module adopts TI's CC2430 chip, the WiFi communication module adopts TL-WN821N wireless network card, and the LTE communication module adopts TE M880TD-LTE4G transceiver module.

The lane gantry has a width of 8m and a height of 3.4m. The WAVE receiving module installed on the lane gantry adopts ZW0301 single chip, the 3G receiving module adopts MC703 chip; the Zigbee receiving module adopts CC2430 chip of TI Company; the WiFi hotspot adopts H3C ER2210C The wired network connecting the wireless router and the driveway gantry to the roadside equipment adopts a standard twisted pair connection.

The roadside equipment adopts Advantech IPC-610L series industrial computer and integrates ZTE M880TD-LTE4G transceiver module.

The data service center uses a ThinkServer TS230 server as an application server, and a Datang Mobile TLE3000 server as a TD-LTE4G core network server.

Compared with the prior art, the utility model has the following advantages:

It can be used for research and verification of vehicle-road coordination system design, information interaction and integration under multi-mode communication, research and verification of key technologies for vehicle-road interactive driving safety systems, research and verification of key technologies for vehicle-road interactive collaborative control systems, and vehicle-road coordination Research and verification of key technologies for system traffic coordination control and other aspects of teaching and experimentation.

Description of drawings

FIG. 1 is an overall structural diagram of a multi-mode wireless communication test platform for vehicle-road coordination of the present invention.

Figure 2 is a schematic diagram of the structure of the vehicle-mounted terminal of the experimental vehicle.

Figure 3 is a schematic structural view of the gantry.

Fig. 4 is a functional block diagram of the utility model.

The utility model will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

Detailed ways

As shown in Figures 1 to 3, the multi-mode wireless communication test platform for vehicle-road coordination of the present invention includes a comprehensive automobile test field, at least one test vehicle, a data service center and a TD-LTE4G wireless base station.

The function and selection of each component in the utility model are as follows:

The vehicle comprehensive performance test site is used to provide a basic test site for test vehicles and a basic environment for a vehicle-road collaborative multi-mode wireless communication test platform. The automobile comprehensive test field adopts an elliptical field with a circumference of not less than 2.2km; several lanes are set on the field.

The TD-LTE4G wireless base station includes an LTE wireless system antenna and an LTE base station radio frequency unit; the TD-LTE4G wireless base station is used to achieve the purpose of covering the entire vehicle comprehensive performance test site with 4G wireless signals. The TD-LTE4G wireless base station is installed at the center of the automobile comprehensive test field, and the installation height is not less than 20m; to ensure that the automobile comprehensive test field is within the coverage of the TD-LTE4G wireless signal.

A driveway gantry is installed at the test starting point of the vehicle comprehensive performance test site, and then a driveway gantry is installed at an interval of 100m along the driveway; a roadside device is installed on one side of each driveway gantry, and the driveway gantry and The corresponding roadside equipment is connected through a wired network, and each roadside equipment is connected to a TD-LTE4G wireless base station through a TD-LTE wireless network, and a TD-LTE wireless base station is connected to a data service center through a fiber-optic cable network;

The test vehicle is used to drive on the test track at different speeds to complete the collection of test data; as shown in Figure 2, each test vehicle is equipped with a vehicle-mounted terminal main control module, which is connected to a The GPS receiving module realizes the positioning and speed measurement of the vehicle; in addition, the vehicle-mounted terminal is also connected with a WAVE communication module, a 3G communication module, a ZigBee communication module and a WiFi communication module through the RS232 interface. /3G/Zigbee/WiFi) to communicate with the corresponding receiving nodes on the gantry, roadside equipment and other test vehicles to conduct research on vehicle-vehicle and vehicle-road multi-mode wireless communication technologies. At the same time, the vehicle-mounted terminal is also connected with an LTE communication module, which is used to realize the communication between the vehicle-mounted terminal and the TD-LTE4G wireless base station through the TD-LTE wireless network.

As shown in Figure 3, WAVE receiving modules, 3G receiving modules, ZigBee receiving nodes and WiFi hotspots for testing vehicle-road communication are installed on the gantry of each lane. The driveway gantry is used to provide an installation platform for wireless receiving nodes. Various wireless communication receiving nodes installed on the driveway gantry communicate with the vehicle-mounted terminal on the experimental vehicle in real time through wireless signals, and transmit the received data to the road through a wired network. side equipment for further processing.

The roadside equipment is used to collect the data sent by the wireless receiving module on the lane gantry, and send it to the data service center through the TD‐LTE4G wireless network.

The data service center is used to analyze and compare the effective data collected under different wireless communication modes, and generate experimental results for different wireless transmission indicators.

TD-LTE4G wireless base station is the most important part of the wireless communication test platform, responsible for the information interaction of the entire test platform, and is a bridge that organically combines all parts of the platform. The TD-LTE4G wireless base station covers the entire vehicle comprehensive performance test site through 4G signals. The vehicle terminals and roadside equipment in the test site communicate with the base station in real time through the TD-LTE4G communication module; the TD-LTE4G wireless base station accesses data through a wired network. Service Center.

Example:

The present embodiment is designed according to the scheme of the utility model, and the automobile comprehensive performance test field adopts the automobile comprehensive performance test field of Chang'an University. The straight lane and the 13,000m ² handling stability test square can fully meet the space requirements for vehicle driving and multi-mode wireless signal transmission.

Taking the location of the 20m Xiuyuan teaching building located in the center of the site as the TD-LTE wireless base station installation address, build a new height on the roof of the Xiuyuan teaching building or use the old 3-6m floor support poles to install the LTE wireless system antenna and The radio frequency unit achieves the purpose of 4G wireless signal covering the entire vehicle comprehensive performance test site, and the TD-LTE wireless base station communicates with the data service center through a wired network;

The first driveway gantry is installed at the starting point of the vehicle comprehensive performance test site, and then the same gantry is installed along the driveway at intervals of 100m; roadside equipment is installed on the side of the driveway gantry, and the gantry and roadside equipment are connected through a wired network. The roadside equipment is connected to the LTE base station through the TD-LTE wireless network, and the TD-LTE wireless base station is connected to the data service center through the optical fiber cable network; the vehicle-mounted terminal is installed on the test vehicle, and the vehicle-mounted terminal receives GPS signals, and through multi-mode wireless communication means ( WAVE/3G/Zigbee/WiFi) communicate with the corresponding receiving nodes on the lane gantry and other test vehicles, and at the same time, the vehicle terminal can also directly access the LTE base station through the TD-LTE wireless network.

The Changan Ford Focus series sedan is used as the vehicle-mounted terminal platform. The vehicle-mounted terminal uses Samsung's S3C2440 chip as the vehicle-mounted terminal's main control module, and the GPS receiving module uses It520 chip, which is connected to the vehicle-mounted terminal's main control module through an asynchronous serial port. WAVE communication module adopts ZW0301 chip, which integrates RF transceiver; 3G communication module adopts MC703 chip, supports 800/1900mhz frequency; Zigbee communication module adopts CC2430 chip of TI Company. Module connection; the WiFi communication module adopts TL‐WN821N wireless network card, and connects with the main control module of the vehicle terminal through USB.

The driveway gantry is built with a steel structure, with a width of 8m and a height of 3.4m. The WAVE receiving module installed on the driveway gantry adopts the same ZW0301 single chip as the vehicle terminal and integrates RF transceiver; the 3G receiving module adopts the same MC703 chip as the vehicle terminal; the Zigbee receiving module adopts the same TI company's CC2430 chip as the vehicle terminal ;The WiFi hotspot adopts H3CER2210C wireless router, and the maximum transmission rate reaches 3.1Mbps; the wired network of the roadside equipment connected to the gantry adopts standard twisted pair connection, supports 100M network, and the effective working length is 100m.

The roadside equipment adopts Advantech IPC-610L series industrial computer, which integrates ZTE M880TD-LTE4G transceiver module, and the maximum download speed reaches 68Mpbs.

The data service center uses ThinkServer TS230 server as the application server, and Datang Mobile TLE3000 server as the TD‐LTE4G core network server. ThinkServerTS230: Cache: 6M, memory: 2*2GB ECC DDR31333 memory, hard disk: 2*500G non-hot-swappable SATA3.5-inch hard disk (7200 rpm), combined with Windows Serve2008 operating system, fully meet the needs of data processing and analysis; LTE3000: Including MME, SGW, PGW, HSS and other network sources, user capacity: 10000, data flow: 10Gbps, maximum power consumption: <4000W.

TD‐LTE4G wireless base station adopts Datang Mobile EMB5116TD‐LTE base station, TYDA‐202616D4T6 antenna and TDRU318T outdoor remote radio unit (RRU). EMB5116: 4 single-mode optical fiber interfaces, connected to 2 RRUs (each RRU is connected to 2 optical fibers); 1 optical port connected to CN2000; the long-term working temperature range is -40°～55°, and the short-term working temperature range is -40° ~70°; TYDA‐202616D4T6: a dual-polarization directional smart antenna with a gain of 15dBi, installed on a pole on the roof and connected to the RRU. Each antenna is connected to the RRU through 9 radio frequency interfaces, including 8 RF channels and 1 CAL channel. The long-term working temperature range is -40°～55°, the short-term working temperature range is -40°～70°, and the working wind speed is 216km/h. TDRU318T: Outdoor remote radio unit (RRU), lightning protection level: DC 20KA. Receiving sensitivity: -105dBm, the long-term working temperature range is -40°～55°, and the short-term working temperature range is -40°～70°. In addition, the base station is connected to the data service center through the optical fiber and cable network.

Fig. 4 is a functional block diagram of the utility model. The test vehicles in the test platform are all assigned a unique IPV6 address as the identification of the vehicle, and they use WLAN/Wi-Fi, WAVE, Zigbee and other communication modes to establish a wireless network between vehicles and between vehicles and roads Through data interaction, a number of research and teaching experiments can be carried out. The main functions of the test platform are divided into two parts: (1) Research on vehicle-vehicle and vehicle-road communication in vehicle-road coordination. (2) Research on multi-network fusion of vehicle-road coordination. As shown in Figure 4, the specific functions of the vehicle-road coordination test platform are reflected in the following aspects:

1. Research on wireless channel model under multi-standard mixed transmission

In order to transmit data reliably, the terminal module must consider supporting multiple communication systems at the same time, among which the DSRC method is used between the vehicle-vehicle and the vehicle-road, and the existing mainstream mobile communication system in my country must be supported between the vehicle-central control system . Traditional channel models are not necessarily applicable to vehicle-road coordination, so it is necessary to re-study channel models of different communication systems, or to modify existing channel models, so as to achieve stable transmission of wireless communication.

2. Research on multi-antenna design of terminal communication module

Since the terminal communication module needs to provide support for multiple communication systems, the design and arrangement of multiple antennas has become an issue that must be considered in the design of the terminal communication module. At present, the mainstream communication frequencies are distributed between 800MHz and 5.6GHz, and it is impossible to use one antenna to complete the reception and transmission of all communication signals. However, due to the limitation of the terminal volume, the possibility of using a separate antenna for each communication system basically does not exist. The combination of several antennas realizes the effective reception of all communication signals.

3. Research on communication interface protocol stack and signaling process

In order to achieve effective monitoring, the vehicle terminal communication module will communicate directly with roadside sensing equipment, roadside control equipment, roadside control host, central control system and other vehicles. In order to ensure the order and stability of communication, it is necessary to build protocol stacks for different interfaces and design the signaling process between each interface.

4. Research on Communication Mechanism of Intensive Communication and Differentiated Business

Various communication requests have different priorities, and research on differentiated processing mechanisms is carried out for various situations. The priorities of the communication categories are arranged as follows: accident emergency rescue>road condition warning>road condition information>other information interaction (navigation, electronic map, positioning...); the priority of the vehicle category is arranged as follows: public services (ambulance, Firefighting...) > Special Transport (Toxic, Corrosive..) > Large Passenger Vehicles > Heavy Goods Vehicles > Other Vehicles. The system provides corresponding processing policies for traffic categories with different priorities. Research related issues in access control, wireless resource allocation, wired transmission reliability, low latency, fast response, etc.

5. Research on vehicle-vehicle/vehicle-road real-time communication technology based on DSRC

DSRC is suitable for communication between vehicles and between vehicles and roads in the ITS field. It can realize real-time, accurate and reliable two-way transmission of images, voices and data in a small area, and organically connect vehicles and roads. During the operation of the vehicle, wireless communication indicators such as communication throughput rate, delay and packet loss rate under different speeds and different communication modes are studied between vehicle-vehicle and vehicle-ground.

6. Research on anti-jamming technology for vehicle-vehicle/vehicle-road communication

Interference in vehicle-road cooperative communication comes from the following aspects: intermodulation interference between roadside units and vehicle-mounted terminal microwave signal sources, co-channel interference, adjacent channel interference, natural noise interference, and external industrial or abnormal noise interference. In the case of dense vehicle wireless communication and vehicle-ground communication, the problems of adjacent channel interference and in-band interference are more prominent. Relying on this platform, conduct anti-jamming technology research based on antenna diversity, time diversity, frequency diversity and other methods.

7. Research on multi-mode wireless access and handover control

The on-board intelligent monitoring module needs to support multiple communication systems, but in actual use, data at the same time can only be received or sent using only one communication system. Which standard to use for transmission is often closely related to factors such as business type and data type. Relying on the test platform, the wireless communication module and other modules can conduct research on sensing data, user information transmission and bearing mode selection, etc.

8. Research on equipment layout and networking strategy

The highway driving environment is complex, the weather conditions are changeable, and the vehicle-mounted terminals have fixed operating lines. In the process of vehicle-road collaborative communication, it is necessary to solve the problem of full coverage of the terminal and the remote mobile communication of the system, the problem of seamless switching of the vehicle-mounted terminal, and the data transmission of the coverage edge terminal. The speed problem, the network integration problem of the LTE network and the DSRC network in the landing part. Therefore, basic research on equipment layout and networking strategy is more important, and the test platform provides a platform for research in this area.

9. Research on network topology discovery and management

Relying on the vehicle-road collaborative test platform, the research on network topology discovery and management technology of various wireless communication modes during vehicle driving can be carried out.

10. Research on high-speed wireless multimedia data transmission technology based on TD‐LTE

Under the 20MHz spectrum bandwidth of the TD-LTE system, the system achieves a spectrum utilization efficiency of 10.8bit/hz downlink and 5.4bit/hz uplink, and can provide a standard peak rate of 100Mbps downlink and 50Mbps uplink, and a system peak rate of 200Mbps downlink and 100Mbps uplink. Relying on the vehicle-road coordination test platform, research on TD‐LTE-based high-speed wireless multimedia data transmission technology can be carried out.

Claims (5)

1. A multi-mode wireless communication test platform for vehicle-road coordination, characterized in that it includes a comprehensive automobile test site, at least one test vehicle, a data service center and a TD-LTE4G wireless base station; The TD-LTE4G wireless base station is arranged in the comprehensive performance test site of the vehicle, and a driveway gantry is installed at the starting point of the test of the comprehensive performance test of the vehicle, and then a driveway gantry is installed at intervals of 100m along the driveway; each driveway A roadside device is installed on one side of the gantry; the driveway gantry is connected to the corresponding roadside device through a wired network, and each roadside device is connected to a TD-LTE 4G wireless base station through a TD-LTE wireless network, and a TD-LTE wireless base station Connect to the data service center through a fiber-optic cable network; Each test car is equipped with a vehicle-mounted terminal main control module, which is connected with a GPS receiving module, a WAVE communication module, a 3G communication module, a ZigBee communication module, a WiFi communication module and an LTE communication module; each The WAVE receiving module, 3G receiving module, ZigBee receiving node and WiFi hotspot for testing vehicle-road communication are installed on the lane gantry; the test vehicle communicates with the GPS satellite through the GPS receiving module, and communicates with the TD-LTE4G wireless network through the LTE communication module. The base station communicates. 2. The multi-mode wireless communication test platform for vehicle-road coordination according to claim 1, characterized in that, the vehicle type of the test vehicle is Changan Ford Focus series sedan, and a vehicle-mounted terminal is installed, and the vehicle-mounted terminal selects Samsung's S3C2440 chip As the main control module, GPS receiving module adopts It520 chip, WAVE communication module adopts ZW0301 chip, 3G communication module adopts MC703 chip, Zigbee communication module adopts CC2430 chip of TI Company, WiFi communication module adopts TL-WN821N wireless network card, LTE communication module adopts TE M880TD‐LTE4G transceiver module. 3. The multi-mode wireless communication test platform for vehicle-road coordination according to claim 1, characterized in that, the lane gantry has a width of 8m and a height of 3.4m, and the WAVE receiving module installed on the lane gantry adopts ZW0301 single chip, 3G receiving module adopts MC703 chip; Zigbee receiving module adopts TI's CC2430 chip; WiFi hotspot adopts H3C ER2210C wireless router, and the wired network connecting the driveway gantry to roadside equipment adopts standard twisted pair connection. 4. The multi-mode wireless communication test platform for vehicle-road coordination according to claim 1, wherein the roadside equipment adopts Advantech IPC-610L series industrial computer and integrates ZTE M880TD-LTE4G transceiver module. 5. The multi-mode wireless communication test platform for vehicle-road coordination according to claim 1 is characterized in that, said data service center adopts ThinkServer TS230 server as application server, and Datang Mobile TLE3000 server serves as TD-LTE4G core network server .

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