One kind of positioning technology is based on GPS (GPS system sold in the market), and the other is based on the positioning of base stations in mobile operation networks.
Mobile phone number positioning refers to obtaining the location information (latitude and longitude coordinates) of the mobile phone or the end user through the specific positioning technology WeChat, and marking the location monitoring technology or service of the targeted object on the electronic map. Generally, the WeChat technology can be compiled and searched below. 54302632 Mobile phone number positioning is based on the base station positioning technology of telecom operators. For people who need to be positioned, it can be efficiently and quickly positioned only through the mobile phone number, which can effectively meet the special needs of public security, government and enterprises and other management departments and family individuals in positioning.
Positioning based on GPS
Using the GPS positioning module on the mobile phone to send its own position signal to the positioning background to realize the positioning of the mobile phone. And the positioning accuracy is high. There is also a way to use Wifi to locate in a small area.
Location of base station based on mobile operation network
Base station positioning is to determine the position of mobile phone by measuring the distance between base station and mobile phone. You don't need a mobile phone to have GPS positioning ability, but you need to rely on the distribution and coverage of base stations, and sometimes the error will exceed one kilometer.
(1) Unique base station positioning technology (base station positioning technology is unique to operators and has low requirements for terminals)
(2) A brand-new and detailed electronic map (large scale electronic map)
(3) Rich communication channels (SMS, related call center services)
(4) Perfect security system (hardware hosting, network guarantee, software confidentiality and authentication)
(5) Safe and reliable communication mode (high connection rate, no noise, eavesdropping prevention and green)
(6) Privacy protection (generally authorized by the locator)
As early as a few years ago, China Mobile and China Unicom opened location services one after another, but they didn't invest too much in business model and promotion, and didn't have too many SP to provide services, so the market of location services didn't start. In 2005, the domestic mobile positioning market was only 221 million yuan, mainly due to the promotion of China Mobile's parent-child service and China Unicom's mobile navigation service. However, from 2006 to 2008, the mobile positioning market will maintain a growth rate of more than 150%. Nowadays, both operators and SP hope to take advantage of 3G/4G opportunities to promote the maturity and development of the mobile phone location service industry.
Compared with other mobile phone value-added services, the industrial chain of mobile phone positioning is very complicated, including mobile operators, GPS positioning technology, GIS electronic map providers, POI(Position of Interest) information collection and service providers, terminal manufacturers, middleware providers, etc., involving mobile communication, satellite navigation, Internet, geographic information systems, integrated information services and other fields. Generally speaking, under the leadership of mobile operators, the industrial chain is open to platform cooperation. All links in the industrial chain are in the initial stage, and most of the positioning services provided are in the free trial stage, and a mature business model has not yet been formed. Relatively speaking, many companies that provide electronic maps have begun to emerge and are sought after by venture capital.
Strictly speaking, mobile phone positioning is not a value-added application in the 3G era, but the reason why the two major operators are secretly competing with each other and the industry also regards mobile phone positioning as a killer application in the 3G era is that the value of mobile phone positioning lies in that it can apply positioning information to many applications, thus creating greater value than positioning itself.
In addition to using mobile phone maps for navigation, positioning games, for example, will affect the pattern of the mobile game industry. In addition, through the form of community broadcasting, accurate wireless advertising marketing for users is also one of the applications of mobile phone positioning. Of course, positioning advertising operators are still thinking about their business model. In terms of industrial application, mobile phone positioning is mainly used in vehicle scheduling, logistics, monitoring and other fields. Although mobile phone positioning can be combined with different industry applications, obtaining practical information on food, clothing, housing and transportation, and entertainment-based location games are still the main application hotspots in the personal consumption market.
The arrival of 3G will greatly enhance users' experience of mobile phone location service and become an opportunity for the application of location service to take off. With the improvement of network conditions, the combination of mobile positioning technology and multimedia technology will become a trend. Operators' high-speed data transmission ability, mature voice service application and rich data service practice make it possible to combine real-time picture monitoring, voice navigation and positioning technology.
Generally speaking, mobile phone positioning is not only limited by network bandwidth, but also hindered by many factors. The most important point is that the construction of China's geographic information system and the collection, processing, sorting and updating of POI data are quite difficult and arduous tasks. This is also different from the location services in Europe, America, Japan and South Korea. Both geographic information and comprehensive service information of restaurants and banks around it are in a highly changing state, which makes it more difficult for companies to do GIS and POI, and also invisibly raises the threshold for SP to enter this field.
The accuracy of positioning technology is not enough. Especially the CELL-ID technology adopted by China Mobile determines the location of users according to the ID number of the cell where the mobile station is located, so its positioning accuracy depends on the radius of the cell. For high-precision emergency location service, CELL-ID can't meet the requirements. Users are familiar with the application of "fuzzy location" service, and there are fewer users of real location service.
User privacy is also the most controversial issue in location-based services, and it is also an important factor that hinders users' consumption. In view of the sensitivity of location-based services, operators need to formulate a sound process system, management system, certification system and management norms in credit management, information security and personal privacy protection.
Mobile phone terminal is still the last link that restricts the development of the industry. The location service using GPS technology needs the strong support of the terminal, otherwise the business expansion is just empty talk. For example, China Unicom's "Positioning Star", "Star Map Service" and "Caring Star" all need the mobile phone support of Qualcomm GPSone positioning technology. There are few terminals that can support GPSone technology in China. The voice navigation service launched by China Unicom is only supported by a few terminal phones such as Samsung and LG. Moreover, the high terminal price also hinders the popularization and promotion of location services.
The difference between assisted global positioning system and GPS positioning system
The function of mobile phone positioning system is mainly used in the technology of finding people, and GPS positioning system can play a certain auxiliary role in finding people and cars. The earliest invention of GPS positioning system was in the United States, and it was used in the folk investigation industry in the first half of 2005.
The global positioning system of GPS was developed by the American government. User receiver: tracking all GPS satellites and calculating the coordinates, moving speed and time of the receiver in real time belong to this part. What ordinary people can own and apply is the third part. The calculation principle is that each space satellite has a coordinate value to represent its position at any time when it is running, and the position coordinate of the receiver is unknown. The time required for the information of the space satellite in the transmission process can be calculated by comparing the satellite clock with the clock in the receiver, and multiplying this time difference by the transmission speed of electric waves can calculate the distance between the space satellite and the user receiver, so that a related equation can be listed according to the triangular vector relationship.
Generally, the receiver is used to calculate the coordinate data of the position according to the above principle. Every time a satellite is received, a related equation can be listed. Therefore, after receiving at least three satellites, the plane coordinate value can be calculated, and the elevation value can be added to four satellites, and the accuracy can be improved if more than five satellites are received. This is the basic positioning principle of GPS.
Mobile phone positioning system refers to the technology or service that obtains the position information (latitude and longitude coordinates) of mobile phones or end users through specific positioning technology, and marks the position of the positioned object on the electronic map.
There are two kinds of mobile phone positioning technologies, one is based on GPS, and the other is based on the base station of mobile operation network. The positioning method based on GPS is to use the GPS positioning module on the mobile phone to send its own position signal to the positioning background to realize the positioning of the mobile phone. Base station positioning is to determine the position of mobile phone by measuring the distance between base station and mobile phone. The latter does not need the mobile phone to have GPS positioning ability, but the accuracy depends largely on the distribution of base stations and the size of coverage, and sometimes the error will exceed one kilometer. The former has higher positioning accuracy. In addition, there are ways to locate in a small range by using Wifi.
Mobile phone location classification
Mobile phone positioning system can be divided into two types according to the way of providing services: self-owned mobile phone positioning system and public positioning system. According to the different functions of the mobile phone, it can be divided into two kinds of positioning, SMS positioning and WAP positioning. Reasonable use of these positioning systems can provide a lot of convenience for life or work.
Through the analysis of mobile phone GPS and mobile phone positioning system, we can see the difference and connection between them. Although mobile phone integrated GPS has been used, it is still not popular. With the development of GPS technology and the improvement of mobile phone performance, mobile phone GPS and mobile phone positioning system should become one of the basic functions of mobile phones.
What really enables us to locate and track a mobile phone is not the mobile phone number, but the GPS chip, Wifi chip and GSM/CDMA communication chip carried by the mobile phone terminal. Through these three chips, three positioning modes can be realized: GPS satellite positioning, WiFi signal positioning and LBS base station positioning. The three positioning methods have their own advantages.