CN216774762U

CN216774762U - Wireless networking communication equipment

Info

Publication number: CN216774762U
Application number: CN202220324104.8U
Authority: CN
Inventors: 王志方; 蒋杰
Original assignee: Beijing Chuangbo Lianhang Technology Co ltd
Current assignee: Beijing Chuangbo Lianhang Technology Co ltd
Priority date: 2022-02-17
Filing date: 2022-02-17
Publication date: 2022-06-17
Anticipated expiration: 2032-02-17

Abstract

The application discloses wireless networking communication equipment, which comprises vehicle-mounted equipment and a portable terminal, wherein the vehicle-mounted equipment is connected with the portable terminal through wireless communication; the first signal processing board comprises a first antenna unit, a first radio frequency channel unit, a first signal processing unit and a power management unit; the first antenna unit is connected with the first radio frequency channel unit, the first radio frequency channel unit is also connected with the first signal processing unit, and the first signal processing unit is also connected with the power management unit; the portable terminal comprises a shell, a second signal processing board and a battery unit, wherein the second signal processing board and the battery unit are packaged in the shell, and the second signal processing board comprises a second antenna unit, a second radio frequency channel unit and a second signal processing unit. The method and the device can transmit various data among the devices in real time; by the software radio technology, the device size, the communication distance, the communication speed and the bandwidth are considered.

Description

Wireless networking communication equipment

Technical Field

The present application relates to the field of networking communications technologies, and in particular, to a wireless networking communications device.

Background

The current mature networking communication technologies include LORA, ZIGBEE, trunking communication, LTE-MESH and the like, which have respective advantages and disadvantages. Specifically, the method comprises the following steps:

networking is performed in an LORA and ZIGBEE mode: the advantages are low power consumption and low cost; the disadvantage is that the communication rate is low, usually only tens of k bandwidth, which cannot meet the requirement of real-time communication.

Networking is carried out through a cluster communication mode: the method has the advantages that the communication rate is high, the functions of group calling, video conference and the like can be realized, and the method is very suitable for centralized command; the method has the disadvantages that a base station needs to be erected, the cost is high, once the star network is interrupted, the star network cannot be rerouted, and the method is not suitable for occasions with complex terrain.

Networking is carried out in an LTE-MESH mode: the problems are solved well, and the MESH networking can be realized while the higher bandwidth is kept; but has the following disadvantages: 1. the power consumption is large, the heat dissipation is more, and the heat dissipation fins are usually carried on the back, so that the product volume is large; 2. usually, only the communication function is needed, and the video, the voice and the like need to be assisted by external equipment; 3. the product adopts a private protocol, the upgrading is difficult, and the BUG usually needs to be integrally returned to a factory for upgrading.

SUMMERY OF THE UTILITY MODEL

Therefore, the wireless networking communication equipment is provided, and the problem that the existing networking communication technology is difficult to give consideration to equipment size, communication distance, communication speed and bandwidth is solved.

In order to achieve the above purpose, the present application provides the following technical solutions:

a wireless networking communication device comprises a vehicle-mounted device and a portable terminal, wherein the vehicle-mounted device is connected with the portable terminal through wireless communication, and the vehicle-mounted device adopts a hierarchical structure and sequentially comprises a screen protective layer, a display screen, a fixing piece, a first signal processing board and a rear cover; the first signal processing board comprises a first antenna unit, a first radio frequency channel unit, a first signal processing unit and a power management unit; the first antenna unit is connected with a first radio frequency channel unit, the first radio frequency channel unit is also connected with a first signal processing unit, and the first signal processing unit is also connected with a power management unit;

the portable terminal comprises a shell, a second signal processing board and a battery unit, wherein the second signal processing board and the battery unit are packaged in the shell; the second antenna unit is connected with a second radio frequency channel unit, the second radio frequency channel unit is further connected with a second signal processing unit, and the second signal processing unit is further connected with a battery unit.

Optionally, the first radio frequency channel unit includes a power amplification module, a channel transceiving front end, and a receiving/transmitting intermediate frequency signal processing module, and is configured to complete mixing, filtering, and power amplification of an intermediate frequency signal in a transmitting state, and complete filtering, amplification, and mixing of a radio frequency signal in a receiving state to generate an intermediate frequency signal; the first signal processing unit comprises a main control processor, a coprocessor, a crystal oscillator, a power supply module, a positioning module, a Bluetooth module, a WiFi module and an interface circuit module; the power supply management unit is used for providing working voltage for each part of the vehicle-mounted equipment; the first signal processing board is connected with the display screen, and a user controls the positioning module, the Bluetooth module and the WiFi module through a user interface displayed by the display screen.

Optionally, the second radio frequency channel unit includes a power amplification module, a channel transceiving front end, and a receiving/transmitting intermediate frequency signal processing module, and is configured to complete mixing, filtering, and power amplification of the intermediate frequency signal in a transmitting state, and complete filtering, amplification, and mixing of the radio frequency signal in a receiving state to generate the intermediate frequency signal; the second signal processing unit comprises a main control processor, a coprocessor, a crystal oscillator, a power supply module, a positioning module, a Bluetooth module, a WiFi module and an interface circuit module; the battery unit is used for providing working voltage for each part of the portable terminal.

Preferably, the vehicle-mounted equipment adopts an Android operating system and is configured with a camera, a loudspeaker and a microphone; the size of a display screen of the vehicle-mounted equipment is more than or equal to 9.7 inches.

Preferably, the first antenna unit of the vehicle-mounted device includes two microstrip array antennas, one of which is disposed on the long side of the first signal processing board, and the other of which is disposed on the short side of the first signal processing board.

Preferably, the second antenna unit of the portable terminal includes two microstrip array antennas, one of which is disposed at a long side of the housing and the other of which is disposed at a short side of the housing

Optionally, the master controller of the first signal processing unit and the master controller of the second signal processing unit are both Zynq-7000 SoC chips of Xilinx; the coprocessor of the first signal processing unit and the coprocessor of the second signal processing unit are both DSP processors of TMS320C6657 model, and the coprocessors are connected with the main control processor through connectors.

Optionally, the positioning module of the first signal processing unit and the positioning module of the second signal processing unit are both a GPS module or a beidou module.

Preferably, the vehicle-mounted equipment is powered by DC12-24V, the power is supplied by a storage battery in the vehicle, and the power is input into the vehicle-mounted equipment and then is input into the power module of the first signal processing unit through the power management unit, so that required working voltage is provided for each part of the first signal processing board.

Preferably, the battery unit of the portable terminal comprises a lithium battery cell, a protection circuit, a charging circuit and a battery structure shell, wherein the capacity of the lithium battery cell is 5000 mAh; the battery unit of the portable terminal provides required working voltage for each part of the second signal processing board through the power module of the second signal processing unit.

Compared with the prior art, the method has the following beneficial effects that:

1. the wireless networking communication equipment provided by the application adopts a software radio ad hoc network scheme to be made into an equipment form of combining the vehicle-mounted equipment and the portable terminal which integrate a human-computer interface, and can transmit real-time voice, video, image and data between the vehicle-mounted equipment and the portable terminal and between the portable terminal and other portable terminals; by adopting the software radio technology, the size and the power consumption of the equipment are reduced, the communication distance, the communication speed and the bandwidth are considered, and the functions of high bandwidth, real-time performance, automatic networking and the like are met; and moreover, the mode of software radio is convenient for upgrading, and the communication distance can be improved by replacing the antenna.

2. The portable terminal has good camouflage performance and is easy to carry, only the wireless communication part needs to be completed, and after the portable terminal is connected with a mobile phone, other functions can be completed through a common commercial mobile phone, so that the portable terminal is not limited by the model of the mobile phone and has strong applicability.

Drawings

To more intuitively explain the prior art and the present application, several exemplary drawings are given below. It should be understood that the specific shapes, configurations and illustrations in the drawings are not to be construed as limiting, in general, the practice of the present application; for example, it is within the ability of those skilled in the art to make routine adjustments or further optimizations based on the technical concepts disclosed in the present application and the exemplary drawings, for the increase/decrease/attribution of certain units (components), specific shapes, positional relationships, connection manners, dimensional ratios, and the like.

Fig. 1 is a schematic structural diagram of an on-board device according to a first embodiment of the present application;

FIG. 2 is a block diagram of a first signal processing board according to an embodiment of the present application;

FIG. 3 is a detailed functional block diagram of an RF channel unit according to an embodiment of the present application;

FIG. 4 is a detailed functional block diagram of a signal processing unit in an embodiment of the present application;

FIG. 5 is a schematic diagram of antenna modeling in an embodiment of the present application;

FIG. 6 is an overall working block diagram of the in-vehicle device in the embodiment of the present application;

FIG. 7 is a flow chart of business layer software in an embodiment of the present application;

fig. 8 is a schematic structural diagram of a portable terminal according to a second embodiment of the present application;

FIG. 9 is a block diagram of a second signal processing board according to an embodiment of the present application;

fig. 10 is an overall operation block diagram of the portable terminal in the embodiment of the present application;

fig. 11 is a schematic diagram illustrating a software radio system according to an embodiment of the present application.

Description of reference numerals:

1. an in-vehicle device; 11. a screen protection layer; 12. a display screen; 13. a fixing member; 14. a first signal processing board; 141. a first antenna element; 142. a first radio frequency channel unit; 143. a first signal processing unit, 144, a power management unit; 15. a rear cover;

2. a portable terminal; 21. a housing; 22. a second signal processing board; 221. a second antenna element; 222. A second radio frequency channel unit; 223. a second signal processing unit; 23. a battery cell.

Detailed Description

The present application will be described in further detail below with reference to specific embodiments thereof, with reference to the accompanying drawings.

In the description of the present application: "plurality" means two or more unless otherwise specified. The terms "first", "second", "third", and the like in this application are intended to distinguish one referenced item from another without having a special meaning in technical connotation (e.g., should not be construed as emphasizing a degree or order of importance, etc.). The terms "comprising," "including," "having," and the like, are intended to be inclusive and mean "not limited to" (some elements, components, materials, steps, etc.).

In the present application, terms such as "upper", "lower", "left", "right", "middle", and the like are usually used for the purpose of visual understanding with reference to the drawings, and are not intended to be an absolute limitation of the positional relationship in an actual product. Changes in these relative positional relationships are also considered to be within the scope of the present disclosure without departing from the technical concepts disclosed in the present disclosure.

In an embodiment of the application, a wireless networking communication device is provided, and comprises an in-vehicle device 1 and a portable terminal 2, wherein the in-vehicle device is in wireless communication connection with the portable terminal. In consideration of the fact that the existing networking communication technology is difficult to take into account of equipment volume, communication distance, communication speed and bandwidth, the wireless networking communication equipment adopts a software radio ad hoc network scheme and is made into a device form of combining vehicle-mounted equipment with an integrated human-computer interface and a portable terminal. The vehicle-mounted equipment supports a large-capacity storage function, has a public network access function, a network management function and an ad hoc network function; the handheld device has ad hoc networking functionality.

Example one

As shown in fig. 1, the vehicle-mounted device 1 adopts a hierarchical structure, and the vehicle-mounted device sequentially comprises a screen protective layer 11, a display screen 12, a fixing member 13, a first signal processing board 14 and a rear cover 15, so that the structure is compact; the screen protection layer material 11 is composed of a glass plate and a support, the display screen 12 is a liquid crystal screen, and the vehicle-mounted equipment 1 is in a thickened tablet personal computer shape. The structural design of the in-vehicle device 1 refers to a vehicle-mounted stage on the market, and the size is reduced as much as possible under the condition of fully considering the functions of each module and heat dissipation.

Specifically, as shown in fig. 2, the first signal processing board 14 includes a first antenna unit 141, a first radio frequency channel unit 142, a first signal processing unit 143, and a power management unit 144, where the first antenna unit 141 is connected in bidirectional communication with the first radio frequency channel unit 142, the first radio frequency channel unit 142 is also connected in bidirectional communication with the first signal processing unit 143, and the first signal processing unit 143 is also connected to the power management unit 144.

In more detail, the first rf channel unit 142 includes a power amplifying module, a channel transceiving front end, and a receiving/transmitting if signal processing module, and the first rf channel unit 142 mainly performs mixing, filtering, and power amplifying on the if signal in the transmitting state, and performs filtering, amplifying, and mixing on the rf signal in the receiving state to generate the if signal, and a detailed schematic block diagram of the first rf channel unit 142 is shown in fig. 3.

Further, as shown in fig. 4, the first signal processing unit 143 includes a main control processor, a coprocessor, a crystal oscillator, a power module, a positioning module, a bluetooth module, a WiFi module, and an interface circuit module; the power management unit 144 is configured to provide operating voltages for various parts of the vehicle-mounted device; the first signal processing board 14 is connected to the display screen 12, and a user controls the positioning module, the bluetooth module and the WiFi module through a user interface displayed on the display screen.

Specifically, the first signal processing unit 143 selects a Zynq-7000 SoC chip of Xilinx as a master processor, and runs a Linux operating system; selecting a DSP processor of TMS320C6657 model as a coprocessor; the coprocessor is connected with the main control processor through a connector. In addition, as shown in fig. 4, the first signal processing unit 143 selects RFIC AD9361 to construct a radio frequency integrated circuit, that is, the first radio frequency channel unit 142; IPEX in fig. 4 is an interface to which the first antenna unit 141 is connected. In addition, the positioning module of the first signal processing unit 143 is a GPS module or a beidou module.

Further, the functions performed by the first signal processing unit 143 specifically include:

(1) high-speed multi-service access distribution, packet multiplexing and de-packet demultiplexing;

(2) encrypting and decrypting service data;

(3) channel coding and decoding, interleaving and de-interleaving;

(4) modulation and demodulation and MIMO transceiving processing;

(5) receiving data by a GPS/Beidou module;

(6) receiving and sending data by the Bluetooth module and the WiFi module;

(7) the radio frequency channel part adopts an RFIC, 2 paths of RX and 2 paths of TX;

(8) 1-way power input and internal power management and distribution.

Further, the first antenna unit 141 adopts two microstrip array antennas, which are shaped on the first signal processing board 14, one is placed on the long side of the first signal processing board 14, and the other is placed on the short side of the first signal processing board 14, the two antennas adopt different polarization modes to increase isolation, and the antenna modeling is shown in fig. 5. Through modeling simulation, the performance indexes which can be achieved by the antenna are shown in table 1.

TABLE 1 antenna Performance Table

Specifically, the vehicle-mounted device 1 is powered by DC12-24V, and is powered by a storage battery in the vehicle, and after being input into the vehicle-mounted device 1, the power is input into the power module of the first signal processing unit 143 through the power management unit 144, so as to provide the required working voltage for each part of the first signal processing board 14.

In summary, the overall operation block diagram of the vehicle-mounted device 1 is shown in fig. 6.

Further, the vehicle-mounted device 1 adopts a standard Android operating system and is equipped with a common camera, a speaker, a microphone and the like; the size of the liquid crystal display 12 of the in-vehicle apparatus 1 is not less than 9.7 inches. Preferably, the onboard device 1 may have dimensions of 245mm 155mm 35mm and a weight not exceeding 2 kg.

In addition, other indices of the vehicle-mounted device 1 include:

a, SIM card: 4G NANO-sim card;

b. public network: 4G TDD-LTE (mobile), FDD-LTE (telecommunications, connectivity);

c. managing the handheld device: management of all portable terminals (handheld devices) within the same group of networks;

d. electronic fences can be arranged for handheld equipment in the network, and functions of reminding, alarming and the like are supported;

e. setting and management through APP software are supported;

f. the system has the functions of transmitting audio, video, image and data in real time;

g. supporting an encryption transmission function;

h. communication distance (single hop): 1.5km (full sight);

i. user rate: self-adapting at 0.2-8M;

j. networking capability: not less than 16 nodes (including one vehicle-mounted device);

k. maximum hop count: not less than 8;

ad hoc networking function: automatically accessing to a network after being electrified;

m. self-healing function: when one connection is interrupted, the MESH nodes can automatically carry out topology recombination to ensure the reliability of data transmission;

n. storage space: more than or equal to 128G;

o. front camera: more than or equal to 500 ten thousand pixels;

p. speaker: not less than 2W;

q. earphones: 3.5mm wired headphones;

r. operating temperature: -10 to 55 ℃.

In addition, from the aspect of software design of the vehicle-mounted equipment, the main functions of the software of the vehicle-mounted equipment comprise equipment state monitoring, electronic fence setting, voice scheduling, Beidou position and GIS scheduling, data information display and transmission and video display. The detailed software design includes interface design, development environment, flow diagram, etc., and should be matched with the hardware design and equipment actually adopted. Specifically, the interface design comprises the steps of designing according to the architectures of linux kernel, hardware interaction layer (hal), c/c + + libraries, Java API Framework and System Apps; the development environment comprises a system development environment and an application development environment, the system development adopts a development suite provided by a platform official network, the development suite comprises an IDE (integrated development environment), a cross compiling environment and the like, and the application development adopts an Android Studio development tool. The service access layer supports voice coding and decoding, short message processing and IP data access processing of a communication system; the signal processing layer completes the functions of radio frequency processing, baseband processing, protocol stack processing and the like of the signal; the interface function provides the access interface function for the application process, and the service layer software flow is shown in fig. 7.

The link layer completes data transmission through DMA and interrupt, and transfers the data to the kernel-mode memory space, and the service driving module distributes voice, short message and IP in the lower half part according to the protocol head part to enter respective data processing protocol stacks and finally enter respective application-mode service modules.

At present, wireless networking communication equipment on the market is usually large in size and power consumption (generally, a radiating fin and a whip antenna with the length of more than 60 centimeters are arranged, and a vehicle-mounted or single-soldier backpack mode is required), and cannot be disguised. Under a proper application scene, the device can be miniaturized and is easy to disguise under the premise of reducing certain indexes and key technical breakthroughs, and the MESH communication of point-to-point 1.5km and not less than 8 hops can be realized in a mode of thickening a tablet personal computer. According to the embodiment of the application, the form of the software tablet computer is matched with the communication of the software radio according to the front-line requirement and the current situation, and the real-time voice, video, image and data transmission can be realized between the vehicle-mounted equipment and the portable terminal and between the portable terminal and other portable terminals. By adopting the software radio technology, the volume and the power consumption of the equipment are reduced, a radiating fin is not needed, the communication distance, the communication speed and the bandwidth are considered, and the functions of high bandwidth, real-time performance, automatic networking and the like are met; meanwhile, the mode of software radio is convenient for upgrading, and the communication distance can be improved by replacing the antenna.

Example two

As shown in fig. 8, the portable terminal 2 includes a housing 21, and a second signal processing board 22 and a battery unit 23, which are enclosed in the housing 21, and take the form of a conventional portable charger.

Specifically, as shown in fig. 9, the second signal processing board 22 includes a second antenna unit 221, a second radio frequency channel unit 222, and a second signal processing unit 223; the second antenna unit 221 is connected to a second rf channel unit 222 in bidirectional communication, the second rf channel unit 222 is further connected to a second signal processing unit 223 in bidirectional communication, and the second signal processing unit 223 is further connected to the battery unit 23.

In more detail, the second rf channel unit 222 is the same as the first rf channel unit 142 in the first embodiment, and includes a power amplifying module, a channel transceiving front end, and a receiving/transmitting intermediate frequency signal processing module, the main functions of the second rf channel unit 222 are to perform mixing, filtering, and power amplifying on the intermediate frequency signal in the transmitting state, and perform filtering, amplifying, and mixing on the rf signal to generate the intermediate frequency signal in the receiving state, and a detailed schematic block diagram of the second rf channel unit 222 is also shown in fig. 3.

Further, the second signal processing unit 223 is the same as the first signal processing unit 143 in the first embodiment, and therefore, as shown in fig. 4, the second signal processing unit 223 also includes a main control processor, a coprocessor, a crystal oscillator, a power module, a positioning module, a bluetooth module, a WiFi module, and an interface circuit module; the battery unit is used for providing working voltage for each part of the portable terminal.

Similarly, the second signal processing unit 223 selects the Zynq-7000 SoC chip of Xilinx as the master control processor, and runs the Linux operating system; selecting a DSP processor of TMS320C6657 model as a coprocessor; the coprocessor is connected with the main control processor through a connector. Also, as shown in fig. 4, the second signal processing unit 223 selects RFIC AD9361 to construct a radio frequency integrated circuit, i.e. the second radio frequency channel unit 222; IPEX in fig. 4 is an interface to which the second antenna unit 221 is connected. In addition, the positioning module of the second signal processing unit 223 is also a GPS module or a beidou module.

Similarly, the second antenna unit 221 is formed in the housing 21 by two microstrip array antennas, one is disposed on the long side of the housing 21, the other is disposed on the short side of the housing 21, the two antennas use different polarizations to increase isolation, and the antenna modeling is shown in fig. 5. Through modeling simulation, the performance indexes that the antenna can achieve are shown in table 1.

Further, the battery unit 23 of the portable terminal 2 includes a lithium battery cell, a protection circuit, a charging circuit and a battery structure casing, wherein the capacity of the lithium battery cell is 5000 mAh; the battery unit 23 of the portable terminal 2 supplies a required operating voltage to each part of the second signal processing board 22 through the power supply module of the second signal processing unit 223.

Specifically, the lithium battery cell mainly comprises a positive plate, a diaphragm, a negative plate and electrolyte; winding or laminating the positive plate, the diaphragm and the negative plate, packaging, filling electrolyte, and leading out the positive lug and the negative lug after packaging to prepare the battery core. It is considered that the cell is only a semi-finished product and cannot be used alone, although it is a storage and release carrier of energy. In order to prevent the over-discharge and overshoot of the battery cell from causing the damage or the failure of the battery cell, a lithium battery protection circuit is added, and the lithium battery protection circuit has the functions of protecting the battery cell from over-discharge, over-charge and over-current and ensuring that the battery cell does not generate a safety accident. The lithium battery charging management chip has the characteristics of small volume, low static power consumption, realization of proper temperature charging by the built-in thermistor and the like. The electric quantity detection of the lithium battery is to select a chip with high measurement precision, low power consumption and small volume. The lithium battery charging and discharging protection chip has the functions of battery reverse connection protection, short circuit protection, overvoltage protection, overcurrent protection and the like, and has the characteristics of simple peripheral circuit, low power consumption, small size and the like.

Further, in practical application, through the bluetooth connection between the mobile phone established by the user and the portable terminal 2, the portable terminal 2 can call a plurality of functions of the mobile phone through the developed corresponding APP, so that the applicability of the portable terminal 2 is strong, the mobile phone is not limited by the model of the mobile phone of the user, and the mobile phone of any model can be accessed into the system only by updating the APP.

Further, in designing the portable terminal 2, the principle to be maintained is:

(1) the camouflage is good, and the appearance of the charger is consistent with that of a common charger;

(2) the wireless performance is good, and the radio frequency link is kept smooth;

(3) the cell capacity is kept as large as possible.

In summary, the overall operation block diagram of the portable terminal 2 is shown in fig. 10.

In addition, other indexes of the portable terminal 2 include:

a. the external dimension is as follows: 170mm 80mm 25 mm;

b. weight: less than or equal to 1 kg;

c. supporting an encryption transmission function;

d. communication distance (single hop): 1.5km (full sight);

e. user rate: self-adapting at 0.2-8M;

f. networking capability: not less than 16 nodes (including one vehicle-mounted device);

g. maximum hop count: not less than 8;

h. ad hoc networking functions: automatically accessing to a network after being electrified;

i. self-healing function: when one connection is interrupted, the MESH nodes automatically carry out network topology recombination to ensure the reliability of data transmission;

j. working temperature: -10 to 55 ℃.

According to a first-line requirement and the current situation, in order to realize the transmission of real-time voice, video, images and data and facilitate carrying and disguising, the wireless communication part is disguised in a mobile phone charger mode, and other functions are completed through a common commercial mobile phone. This brings the benefits that:

(1) the camouflage performance is good, and the mobile phone and the charger are standard configurations for traveling;

(2) the method is not limited by the model of the mobile phone, and the mobile phone with any model can be accessed to the system only by updating the APP;

(3) the equipment is light in weight and low in heat productivity.

In summary, the key technologies applied to the vehicle-mounted device 1 and the portable terminal 2 include:

1. software radio technology

Wireless communication technology has found a great deal of use in the commercial, military, and like fields. The wireless communication systems are characterized by diversification and complication. The traditional wireless communication equipment cannot meet the requirement of being compatible with various communication systems due to single function and poor reconfigurability. In response to this problem, the idea of a software radio platform was created.

Communication networking equipment is consistent in implementation with Software Defined Radio (SDR), and software defined radio architectures have rapidly developed in recent years and formed a unified specification, so that the architecture of software defined radio is in the best of the solution considerations. The chip with the highest maturity and high integration level is selected for design.

As shown in fig. 11, a mainstream software radio system mainly includes two major parts, i.e., radio frequency and digital. The radio frequency part mainly completes the work of converting baseband signals into radio frequency signals, and the digital part mainly completes signal modulation/demodulation, coding/decoding.

The software radio platform signal processing is as close as possible to the antenna end, the information is digitized as early as possible, and modulation and demodulation and data receiving and transmitting of the wireless information are realized by adopting a programmable and easily reconfigurable mode.

The basic features of the software radio include:

(1) reconfigurability

The reconfigurable configuration is the primary characteristic of software radio to realize multi-mode application. The characteristic of reconfigurability is realized by a digital technology, and a functional module in the system is changed by software configuration, so that the programmable requirement is realized in the radio platform, the service capability of the system is changed, and the requirement of supporting multiple frequency bands and multiple systems is met.

(2) Flexibility

Flexibility is mainly reflected in the ability of software radio to intelligently utilize spectrum, and is established on a reconfigurable basis. Software radio technology enables new communication systems which continuously appear to be rapidly realized, and the expansibility of a wireless communication platform is greatly improved.

(3) Modular

Software radio technology employs the idea of modularity. Different tasks are packaged according to the functional modules and separated, so that the coupling relation in front of each functional part is reduced, the difficulty of system reconfiguration is reduced, and the wireless communication platform has better reconfigurable capability and flexibility.

2. Advanced physical layer techniques

Cofdm multi-carrier, strong resistance to frequency selective interference;

2 multiplied by 2MIMO multichannel, space-time coding effectively utilizes passive relays such as reflection and refraction to enhance signals;

c. the method is suitable for frequency hopping and spread spectrum, and effectively resists malicious interference, interception and interception;

d. and the self-adaptive rate automatically reduces the transmission rate when the channel environment is deteriorated so as to ensure reliable communication.

3. Multi-hop ad hoc networking techniques

a. Automatic networking, automatic routing calculation and dynamic topology without manual intervention;

b. the method supports 32-node ad hoc network and automatic multi-hop transmission, and realizes seamless coverage of the area;

c. advanced access technology is adopted, multiple service priorities are supported, and high reliability and low delay are achieved.

4. Portability and ease of use

a. The device can be used after being started without setting;

b. two-layer routing, service transparent transmission;

c. the Web configuration function is supported, and remote management can be realized;

d. all operations can be performed by a common commercial mobile phone.

5. Customized functionality

a. The emission power is 0.1-2W adjustable;

b. the working frequency band U/L can be customized;

c. the signal bandwidth can be set;

6. application layer encryption techniques.

And special service data encryption software is designed, and the encryption algorithm defined by the user can be also used for designing. By adopting the end-to-end encryption technology, other people and equipment except the sender and the receiver of the data cannot read or change the communication data. Can realize that:

a. data leakage prevention

In the end-to-end encryption process, all user data, except for IP addresses and routing information, is encrypted. When the data is sent, the data is encrypted, and when the data is received by the receiver, the data is decrypted. And encrypting each piece of information, each photo, each video and each file, and encrypting the voice and video call information of the user. Only both parties of the communication (i.e. the sender and the receiver of the information) can decrypt the data, even if the intermediate server, the developer, and the network operator of the application cannot decrypt the data.

b. Key distribution for preventing key leakage

End-to-end encryption may also prevent attackers from obtaining encryption keys for decrypting communication sessions.

c. Preventing man-in-the-middle attacks

Even if data is not leaked, a man-in-the-middle on the network cannot replace the data or counterfeit data and transmit the data.

d. The hierarchy of concern

A security service layer; a key distribution management layer; a cryptographic primitive layer; a mathematical theory layer.

All the technical features of the above embodiments can be arbitrarily combined (as long as there is no contradiction between the combinations of the technical features), and for brevity of description, all the possible combinations of the technical features in the above embodiments are not described; these examples, which are not explicitly described, should be considered to be within the scope of the present description.

The present application has been described in considerable detail with reference to certain embodiments and examples thereof. It should be understood that several conventional adaptations or further innovations of these specific embodiments may also be made based on the technical idea of the present application; however, such conventional modifications and further innovations can also fall into the scope of the claims of the present application as long as they do not depart from the technical idea of the present application.

Claims

1. The wireless networking communication equipment is characterized by comprising vehicle-mounted equipment and a portable terminal, wherein the vehicle-mounted equipment is connected with the portable terminal through wireless communication, and the vehicle-mounted equipment adopts a hierarchical structure and sequentially comprises a screen protective layer, a display screen, a fixing piece, a first signal processing board and a rear cover; the first signal processing board comprises a first antenna unit, a first radio frequency channel unit, a first signal processing unit and a power management unit; the first antenna unit is connected with a first radio frequency channel unit, the first radio frequency channel unit is also connected with a first signal processing unit, and the first signal processing unit is also connected with a power management unit;

2. The wireless networking communication device of claim 1, wherein the first rf channel unit comprises a power amplifying module, a channel transceiving front end, and a receiving/transmitting intermediate frequency signal processing module, and is configured to perform mixing, filtering, and power amplification on the intermediate frequency signal in a transmitting state, and perform filtering, amplification, and mixing on the rf signal to generate the intermediate frequency signal in a receiving state; the first signal processing unit comprises a main control processor, a coprocessor, a crystal oscillator, a power supply module, a positioning module, a Bluetooth module, a WiFi module and an interface circuit module; the power supply management unit is used for providing working voltage for each part of the vehicle-mounted equipment; the first signal processing board is connected with the display screen, and a user controls the positioning module, the Bluetooth module and the WiFi module through a user interface displayed by the display screen.

3. The wireless networking communication device of claim 1, wherein the second rf channel unit comprises a power amplifying module, a channel transceiving front end, and a receiving/transmitting intermediate frequency signal processing module, and is configured to perform mixing, filtering, and power amplification on the intermediate frequency signal in a transmitting state, and perform filtering, amplification, and mixing on the rf signal to generate the intermediate frequency signal in a receiving state; the second signal processing unit comprises a main control processor, a coprocessor, a crystal oscillator, a power supply module, a positioning module, a Bluetooth module, a WiFi module and an interface circuit module; the battery unit is used for providing working voltage for each part of the portable terminal.

4. The wireless networking communication device of claim 1, wherein the vehicle-mounted device adopts an Android operating system and is configured with a camera, a speaker and a microphone; the size of a display screen of the vehicle-mounted equipment is more than or equal to 9.7 inches.

5. The wireless networking communication device of claim 1, wherein the first antenna unit of the in-vehicle device comprises two microstrip array antennas, one of which is disposed on the long side of the first signal processing board and the other of which is disposed on the short side of the first signal processing board.

6. The wireless networking communication device of claim 1, wherein the second antenna unit of the portable terminal comprises two microstrip array antennas, one disposed at the long side of the housing and the other disposed at the short side of the housing.

7. The wireless networking communication device of claim 1, wherein the master processor of the first signal processing unit and the master processor of the second signal processing unit are both Zynq-7000 SoC chips of Xilinx; the coprocessor of the first signal processing unit and the coprocessor of the second signal processing unit are both DSP processors of TMS320C6657 model, and the coprocessors are connected with the main control processor through connectors.

8. The wireless networking communication device of claim 1, wherein the positioning module of the first signal processing unit and the positioning module of the second signal processing unit are both a GPS module or a beidou module.

9. The wireless networking communication device according to claim 1, wherein the vehicle-mounted device is powered by DC12-24V and is powered by a storage battery in the vehicle, and after power is input into the vehicle-mounted device, the power is input into the power module of the first signal processing unit through the power management unit, so that required working voltage is provided for each part of the first signal processing board.

10. The wireless networking communication device of claim 1, wherein the battery unit of the portable terminal comprises a lithium battery cell, a protection circuit, a charging circuit and a battery structure casing, wherein the capacity of the lithium battery cell is 5000 mAh; and the battery unit of the portable terminal provides required working voltage for each part of the second signal processing board through the power module of the second signal processing unit.