The hottest GPRS monitoring scheme for automobile

2022-10-18
  • Detail

GPRS automobile industry monitoring plan

I. overview

with the continuous deepening of China's economic reform and the gradual establishment of the market economic system, road construction, road transportation and other transportation undertakings are developing by leaps and bounds. In order to further manage the transportation market and ensure transportation safety, transportation departments at all levels are actively promoting "intelligent transportation": that is, through the use of advanced information, communication Control and other high-tech transform the traditional transportation system to form a new type of information, intelligent and socialized transportation

after installing the on-board GPS satellite positioning system on the long-distance shuttle bus, tourist bus and dangerous goods transportation vehicle, the vehicle can be monitored in real time through the central monitoring system, which has a positive auxiliary management role for the management department to supervise the drivers' speeding, fatigue driving and improve the level of transportation production organization; At the same time, the monitoring center can implement the alarm function for long-distance operating vehicles that are in the situation of overspeed, breakdown, etc., so as to reduce the incidence of traffic accidents and improve transportation safety production. At present, the on-board GPS system has been recognized by relevant management departments and enterprises and is being actively promoted and applied

aoyi electronics is a high-tech company specializing in broadband and wireless data communication. The company has launched a series of GPRS wireless communication products to the market. Combined with the latest on-board GPS technology, it has launched a new generation of all IP network on-board GPS monitoring and transmission system. It innovatively uses TCP of GPRS. Ningbo should take the new development concept as the guide/ip data communication and SMS Backup have replaced the communication mode that used to rely solely on SMS to transmit data in the past, It has high comprehensive performance price ratio

II. Analysis of the existing on-board GPS short message system

the communication of the existing on-board GPS short message system is mainly realized by GSM short message, and its typical applications are as follows:

1. Technical characteristics of the existing GPS short message scheme:

the on-board GPS information machine collects and calculates the position information of the car collected in real time by the GPS device

the on-board GPS information machine sends the processed information to the corresponding SP or designated number of the transportation management monitoring center in a short message

the transportation management monitoring center receives the corresponding on-board GPS information through SP or the designated number

under special circumstances, the transportation management monitoring center directly sends SMS to control the on-board GPS system through SP or designated number, such as alarm or forced flameout

2. Shortcomings of the existing GPS short message scheme

the transmission time is uncertain: because the short message is transmitted in the channel command slot, there is no special data channel, so it is easy to delay or lose data transmission when the command slot is busy

limited channel capacity: a short message can transmit 140 valid bytes at most, which cannot comprehensively and timely reflect the real-time information of the vehicle

the communication cost is expensive: it is basically calculated according to the total number of pieces sent and received

poor scalability: with SMS as the main communication link, it is unable to further expand other data transmission services in the future due to the impact of link bandwidth. Such as image monitoring during vehicle operation

although the on-board GPS monitoring system is conducive to the transportation department to realize intelligent traffic management, the current comprehensive performance of short message mode is poor, which hinders the full promotion of the system

III. Development Status and technical analysis of GPRS

GPRS (General Packet Radio Service) is a new packet switched data application service developed on the existing GSM network. GPRS is the mainstream technology and an important milestone in the evolution of global mobile communication network technology to the third generation mobile communication (3G), which is called 2.5 generation mobile communication. Compared with the traditional GSM circuit dial-up switching, GPRS has made a qualitative leap in resource utilization efficiency, switching capacity and performance. GPRS discards the traditional exclusive circuit switching mode and adopts packet switching technology. Each user can occupy multiple wireless channels at the same time, and the same wireless channel can be sampled repeatedly to see how the repeatability can be shared by multiple users, which makes effective use of channel resources, and the maximum bandwidth can reach 171.2kb/s. At present, the GPRS coverage of China Mobile has reached almost 100% in central cities and more than 80% in remote areas. The actual application bandwidth is about kb/s, which is particularly suitable for various medium and low-speed burst communication needs in industries such as financial transactions and remote monitoring, and completely replaces the traditional wired modem, X.25, data radio, SMS and other communication methods in the past

gprs adopts tcp/ip protocol, which is very easy to integrate with the existing Internet technology and application platform. It will combine various IP technologies and services with mobile communication technology to provide customers with various high-speed and high-quality mobile data communication services

IV. new GPRS scheme of on-board GPS system

through in-depth analysis of the existing on-board GPS short message system, we believe that a convenient, cost-effective, at any time, stable communication mode can effectively solve the huge cost of on-board GPS monitoring system in communication transmission, and is a necessary means for the general promotion of on-board GPS monitoring system in the transportation industry. Now, the GPRS network of China Mobile is a new communication method to meet this demand. At the same time, with the original SMS as the backup link, it can completely ensure the GPS monitoring system 4 The real-time and reliability of data transmission in the preparation technology of new printing materials for cultural products, as well as the qualitative improvement in performance and price, are actively promoting the trial production of products. Its group mode is as follows:

1. Main features:

low communication cost: the communication feature of the on-board GPS monitoring system is sudden, but the amount of data is small, which is very advantageous for GPRS with flow billing. Taking a GPS information transmission as an example, the minimum cost of using short message is 0.10 yuan/piece. By using GPRS, the cost is reduced to 1 ~ 2 cents, which is reduced by more than 80%, which is very cost-effective

high data transmission efficiency: GPRS is a new type of mobile data communication service, which provides mobile users with high-speed wireless IP services. After analysis and processing, the location information collected by GPS equipment is encapsulated in IP message for transmission, and its maximum data transmission efficiency is 90%

strong and beneficial security measures: GPRS network adopts a variety of physical channel encryption methods of GSM. At the same time, in the application layer, it also provides central dedicated line access, special APN and other security measures, which can fully meet the security scalability requirements of the transportation management system

strong scalability: GPRS can be used according to the needs of future services

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