What are the operating systems of mobile phones, infrared and Bluetooth?

Generally only suitable for high-end smartphones. At present, in the smart phone market, China market is still dominated by personal information management phones. With the participation of more manufacturers, the overall market competition began to show a decentralized trend. Judging from the market capacity, competition and application, the whole market is still in its infancy.

At present, there are four main operating systems used in mobile phones: PalmOS, Symbian, Windows CE and Linux.

Symbian system: Symbian is a real-time, multi-tasking pure 32-bit operating system with the characteristics of low power consumption and less memory occupation. Very suitable for mobile devices such as mobile phones. After continuous improvement, it can support GPRS, Bluetooth, SyncML and 3G technologies. Most importantly, it is a standardized and open platform, and anyone can develop software for Symbian-enabled devices. Different from Microsoft products, symbian separates the general technology of mobile devices, that is, the kernel of operating system, from the graphical user interface technology, which can adapt to different input platforms well, and also allow manufacturers to make more friendly operating interfaces for their products, in line with the personalized trend, which is the main reason why users can see different Symbian systems. Now java programs developed for this platform have begun to prevail on the Internet. Users can expand the functions of mobile phones by installing these softwares.

In the development stage of Symbian, there are three branches: Crystal, Pearl and Quarz. The first two are mainly aimed at the communicator market, which is also the most common on mobile phones, and will be the main force of smart phone operating system in the future. The first mobile phone based on Symabian system was Ericsson R380 mobile phone which went on sale in 2000. What really caught people's attention at the same time was the Nokia 92 10 launched by 200 1. It uses a crystal branch system. Nokia 7650 and 3650 launched in 2002 are both Symbian Pearl models, of which 7650 is the first smartphone product based on 2.5G network, both of which belong to Symbian version 6.0. Sony Ericsson has introduced a model that also uses the Pearl branch of Symbian. Version has been developed to 7.0, which is specially developed for 3G networks. At present, Nokia has reached 6630 and 668 1 of 8.0, which can be said to represent the most powerful mobile phone operating system today. In addition, Symbian has supported external storage devices such as MMC cards since version 6.0, which makes it possible to store more software and various large-capacity multimedia files.

Windows Mobile system: Windows Mobile system includes Pocket PC, smart phone and media center. Pocket PC is aimed at wireless PDA, and Smartphone is specially designed for mobile phones. IT has been used by many new mobile phone manufacturers from the IT industry, and the growth rate is very fast.

According to Microsoft's official statement: "Windows Mobile extends the familiar Windows experience to the mobile environment, so you can use it to work immediately."

In fact, Windows Mobile is a major brand adjustment for Microsoft to enter the field of mobile devices. It includes three platform systems: PDA, smart phone and media center, which is oriented to the personal mobile electronic consumer market. Because most models support color display, it consumes a lot of power, and because Windows CE itself devours resources. In terms of function expansion, Microsoft tends to use it in an integrated way, and most of them have standard CF card slots. Users can increase memory and install cameras, modems and other equipment according to their own needs.

Windows Mobile, which is specially developed by Microsoft for mobile phones, provides many functions, and the functions realized on different platforms overlap and each has its own emphasis. All three platforms support data synchronization with the desktop. The functions provided by smart phones are mainly contacts, and the main supported functions are: telephone, email, contacts and instant messaging. The function of PocketPC focuses on personal transaction processing and simple entertainment. The main supported functions are: scheduling, mobile version of Office, simple multimedia playback.

Linux system: Linux system is an open source operating system, and many versions are popular at present. But it has not been widely supported.

Linux has entered the mobile terminal operating system for nearly a year, and it has attracted more and more attention from terminal manufacturers and operators, including Motorola and NTT DoCoMo, because of its open source advantages. Mobile phones based on Linux have been developed, including Motorola A760, A768, CEC e2800, Samsung i5 19 and so on. In June 2004, at the "LinuxWorld Expo/Tokyo 2004" Expo held in Tokyo, Japan, Japanese mobile phone manufacturer NEC showed its mobile phone equipped with Linux operating system. China Datang Telecom also announced in July that Linux will become its TD-SCDMA 3G mobile phone operating system.

Compared with other operating systems, Linux is a latecomer, but it has two incomparable advantages. First, Linux has open source code, which can greatly reduce the cost. Secondly, it not only meets the requirements of mobile phone manufacturers to develop their own Linux mobile phone operating system according to the actual situation, but also attracts many software developers to develop content application software, enriching third-party applications.

However, Linux operating system has its inherent shortcomings: it is difficult to get started, few engineers are familiar with its development environment, and the integrated development environment is poor; Because the source code of Microsoft PC operating system is not open, the connectivity between Linux-based products and PC is poor; Although there are a large number of companies engaged in the development of Linux operating system at present, there are few companies with strong development strength, and these companies are developing independently, so it is difficult to make greater technological breakthroughs.

Although Linux has unique advantages in technology and market, it can't compete with Symbian at present, and it is not easy to gain a foothold and seize market share in the increasingly competitive mobile phone market.

Palm OS operation: This is a 32-bit embedded operating system, which is mainly used for mobile terminals. This system was originally developed by Palm Computing Department of 3Com Company, and now Palm Computing has become an independent company. The combination of Palm OS and HotSync can synchronize the information on mobile terminals and computers, and extend the functions of desktop to mobile devices.

Palm OS operating system was developed by Palm Company and licensed to Handspring, Sony, Qualcomm and other equipment manufacturers. This operating system prefers PDA operating system.

Palm OS dominates the PDA market. Palm's product line itself includes smartphones, and it also announced the merger with Handspring, the earliest smartphone developer, to separate the software department.

Infrared data association is the configuration standard of a new generation of mobile phones, which supports data exchange between mobile phones and computers and other digital devices. Infrared communication has the characteristics of low cost, convenient connection, simple use and compact structure, so it has been widely used in small mobile devices. Through infrared data association, various mobile devices can exchange data freely.

Infrared is an electromagnetic wave with a wavelength between 750nm and 1mm, and its frequency is higher than that of microwave and lower than that of visible light, which is invisible to human eyes. Infrared ray is more suitable for point-to-point linear data transmission that needs short-distance wireless communication because of its short wavelength and poor diffraction ability to obstacles. Infrared Data Association (IRDA) limits the wavelength range of light waves used in infrared data communication to 850 nm to 900 nm.

It is very simple to surf the internet wirelessly with a mobile phone equipped with infrared data association. There is no need to connect cables and PC cards. As long as the infrared connection protocol is set, you can surf the Internet directly.

Nowadays, many mobile phones are under the slogan of supporting Bluetooth, but supporting Bluetooth does not mean that Bluetooth has the same transmission ability.

Some people may think that this is related to the Bluetooth version of the mobile phone, some are Bluetooth 1. 1 and some are Bluetooth 1.2.

In fact, the reason is not at this level, but more about the standards of Bluetooth projects.

If your mobile phone uses more Bluetooth standards, then your mobile phone has stronger Bluetooth capability.

Brief introduction of Bluetooth function of mobile phone

First, let's talk about several major Bluetooth standards.

1. Address List

Almost all Bluetooth phones can be sent to OUTLOOK contacts on the computer.

However, few computer prospects can be transmitted to mobile phones.

2. Communication transmission

In fact, this is the internet access function, which is supported by all Bluetooth phones. The function of a mobile phone can be considered as equivalent to that of a cat.

The other is WAP network on GPRS.

This is also because GPRS mobile phones support GPRS, WAP mobile phones support WAP and CDMA mobile phones support CDMA.

facsimile

This function may be used less, because there is a service charge for the mobile phone plus fax function.

4. Bluetooth headset

This is nothing special, everyone supports it.

Bluetooth headset is born for Bluetooth mobile phone.

It's just a little expensive. There is no way.

5. File transfer

Most mobile phones support file transfer, but most mobile phone files are transferred to other Bluetooth devices, and FTP files that support PDA and computer transfer to mobile phones are less.

6. Serial port service

It's hard to say that many functions can be realized through serial port.

For example, Bluetooth mobile phones control computers, or connect to the Internet and so on.

This can actually be called an extension of existing functions.

Isn't there a lot of data lines in COMS port ~ ~ ~

7. Mobile phone service

Not many mobile phones support this function.

Perhaps Sony Ericsson's models support more. With this function, you can not only send text messages with your computer and PDA.

And the call is also very smooth, representing the MP of the software PDA