The future intelligent vehicle is a comprehensive system integrating environment sensing, planning decision-making, multi-level assisted driving and other functions. It will use a variety of sensors, mobile network technology, intelligent highway technology to achieve automatic driving and access to entertainment or living services. You can access the remote information base at any time to get information on navigation, restaurants, hotels, gas stations, parking lots, etc. (Figure 1).
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Figure 1: The future smart vehicle can access the remote information base at any time to obtain information such as navigation, catering, hotels, gas stations, parking lots and so on.
Imagine installing a smart car multimedia terminal in the future. The driver can directly use the voice to conduct multimedia search without using the hand to operate the navigation software to ensure the safety of driving. The device that receives the voice command accesses the server through the wireless network in the database. Looking for an address, obtaining a road map, you can also get real-time information on the road ahead by the traffic management center. You can find out which roads have accidents such as traffic jams and accidents, and change the driving route if necessary.
During the driving process, the driver can use voice to find restaurants and gas stations. At the same time, when the vehicle passes through the hotel and parking lot on the way, it can also push its current latest position and parking space through the multimedia platform to make the insiders timely. Understand the information to make a choice.
When unfortunately encountering a serious car accident, the on-board equipment will automatically activate the emergency alarm system, send location information and help signals to the command center, so that personnel can get rescue in time. For transportation vehicles, with the in-vehicle wireless communication system, the car and the command center can easily exchange information and schedule in real time.
The application development of the Internet of Vehicles is in full swing, and the industries such as catering, shopping, and insurance are gradually integrated into the automotive industry. Like the development boom of apps after the popularity of smart phones, various types of in-vehicle apps and car networking systems have emerged, and these and data are stored. Relevant and location service related applications must be built on the in-vehicle intelligent platform and require stable communication technology and positioning technology as the basis.
Next: Wireless communication rate around the car application success or failure
Wireless communication rate around the car application success or failure
In the past, second-generation mobile communication (2G) technology in-vehicle products were limited by speed and tariffs, and could only provide simple services such as text messaging, such as taxi scheduling. Now 4G networks have begun to be laid out, but the tariff is too expensive, and the network construction will take time, so the 3G network is still the best choice at this stage.
The general wireless packet service (GPRS) transmission rate generally does not exceed 100kb/s, while the UC20 developed by Shanghai Quectel supports high-speed data transmission, and high-speed packet access (HSPA)/enhanced high-speed packet connection. In the (HSPA+) mode, the uplink speed can reach 5.76Mb/s, and the downlink speed can reach 14.4Mb/s. The performance is much higher than that of GPRS products. Developed on the Qualcomm 2nd Generation Global System for Mobile Communications (UMTS) platform MDM6200, the UC20 is high-speed, small-size, and low-power, compatible with HSPA+/UMTS/Enhanced Data Rate GSM Evolution (EDGE)/Global System for Mobile Communications Various network specifications such as (GSM)/GPRS.
In addition, all components that are related to the car, the most concerned about it must be the quality of the product. The International Organization for Standardization (ISO) published an industry-wide quality system requirement in March 2002 for the supply chain of components and service parts for the entire automotive industry. The English language is ISO/TS 16949. Therefore, all products that need to enter the automotive industry must first pass this certification; this certification imposes very high demands on manufacturers.
Next: Integrate multiple positioning methods to ensure fast positioning without blind spots
Integrate multiple positioning methods to ensure fast positioning without blind spots
The Qualcomm UMTS platform MDM6200 includes a Global Navigation Satellite System (GNSS) receiver that provides a highly integrated platform for automotive product development. The receiver is compatible with two sets of positioning systems, Global Positioning System (GPS) and GLONASS. Compared with the separate GPS positioning system, the receiver not only increases the visible satellite, but also solves the problem of insufficient single system coverage and shortens the first positioning time (TTFF). The time, in particular, enhances the positioning accuracy in harsh outdoor environments.
UC20 supports gpsOneXTRA assisted positioning technology. Users can download a small XTRA file from the network server through the communication module. This file contains the reference clock and 7-day GPS/GLONASS ephemeris data prediction. The TTFF time is shortened to 2 seconds. .
Figure 2: In addition to GNSS technology, cellular positioning technology can also provide assisted positioning for GNSS technology.
In addition to GNSS technology, manufacturers have developed honeycomb positioning technology as a powerful complement to GNSS technology. When the in-vehicle device enters into terrain such as an underground passage or an urban canyon, environmental factors can make the GNSS signal weaker. At this point, the cellular positioning technology can be activated and the information of the base station can be used for positioning (Fig. 2).
The advantages and disadvantages of cellular positioning technology depend on the density set by the base station and the data stored in the base station information in the service provider database. Nowadays, 3G network coverage is increasing, and manufacturers provide customers with a server with a large database of base station information, which collects most of the base station information in more than 200 countries around the world, and continuously maintains and updates this database.
Next: M2M module design new trend compatible with a variety of intelligent operating systems
M2M module design new trend compatible with a variety of intelligent operating systems
There are more and more in-vehicle applications, and there are higher requirements for network stability and security. The machine-to-machine (M2M) module acts as a middleware for communication. It needs to provide multiple network protocols to support the upper-layer applications. The UC20 embedded TCP/IP communication protocol provides TCP, UDP, PPP, MMS, SMTP, FTP, HTTP, PING. Users can easily implement Internet (Internet) access, and the Secure Sockets Layer (SSL) communication protocol facilitates users to implement network encryption.
At the International Consumer Electronics Show (CES) show at the beginning of this year, some IT companies and auto companies led by Google set up an open car alliance to introduce the Andriod system into future smart cars. Linux and WinCE also have some supporters.
M2M modules must be used in automotive and other industries and must support multiple operating systems. For example, some manufacturers have designed the RIL layer compatible with Android and WinCE, which can be easily developed on these platforms. In addition, for the Universal Serial Bus (USB) 2.0 interface, more drivers for Windows XP, Windows Vista, Windows 7, Windows 8, Windows CE 5.0/6.0, Linux 2.6/3.0, Android 2.3/4.0 are designed. Can support all major platforms on the market.
Next: Supporting emergency call system is imperative in the telematics market
Supporting emergency call systems is imperative
eCall is an emergency call system initiated by the European Union. After a serious traffic accident anywhere in Europe, if the driver and passengers are unconscious and cannot make a call, the system can automatically dial a European emergency emergency call and transmit the smallest emergency datagram to the Public Safety Answering Point (PSAP). Provide timely rescue services (Figure 3). If the equipment manufacturer's products are to enter the EU, eCall is an essential function.
Figure 3: eCall automatically calls the European unified emergency call and transmits the smallest emergency datagram to the public safety answering point to provide timely assistance.
The telecom communication market is in the ascendant
The craze for smart cars is a good opportunity for M2M module manufacturers. How to improve product quality and safety performance, while taking into account product integration, transmission speed, and reduce energy consumption, is a problem that every module manufacturer needs to continuously explore, and is also an important direction for future product development.
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