Mobile knowledge and mobile phone performance test

introduction of mobile phone terminology

　　Mobile Phone

Mobile phone is also called cellular phone, originated from a base station radiation wave effective area shape is a hexagonal, countless base stations linked together, like a beehive. and the effective area of radiation wave of the base station is also called the community.

　　resolution

Refers to the number of pixels that appear on the screen, which are calculated in two parts, which are the points of the horizontal row and the points of the vertical row. For example, if the resolution is 800x600, it means that the image consists of 800 horizontal points and 600 vertical points. Higher resolutions can show more on the same area of the screen.

　　Color Depth

The color depth determines how many colors control each pixel on the screen. Usually the color depth can be set to 4 bits (256 colors), 8-bit (4096-color), 16-bit (65536-color), 24-bit (26w-color), of course, the higher the number of color depth, the more colors you can get, the better the image quality on the screen.

　　Camera

Mobile phone digital camera can zoom, adjust brightness, as well as Flash, video recording and other functions. CMOS CIF: One of the resolution of the mobile phone's digital camera, which can take pictures of 352x288 pixels. (11w camera) CMOS VGA: A mobile phone digital camera resolution, the largest can be photographed 640x480 pixel photos. (30w camera) CMOS SXGA: A mobile phone digital camera resolution, the largest can take 1280x960 pixel photos. (120w camera)

　　Pixel

Pixel (pixel) is a shorthand for the picture element, the digital image is composed of different brightness points arranged at a certain interval, the unit of pixels is called "pixel", that is, the smallest unit that makes up the image is the pixel, and the pixel is the smallest factor of the image. It represents the dots for each color screen, although they are so small that you can't see them, but any data on the color screen, the images, are made of these dots. The number of pixels on the screen is determined by the resolution of the screen and is not determined by the size of the screen.

　　MMS

MMS is the abbreviation of Multimedia Messaging service, Chinese translation for multimedia Information Services, also known as "MMS." Its biggest characteristic is supports the multimedia function, may under the GPRS,CDMA 1x,3g,edge support, uses the WAP Wireless application protocol as the carrier to transmit the video short film, the picture, the voice and the text, transmits the way besides in the mobile phone, but also may be between the handset and the computer transmission. The unique feature of the MMS-enabled mobile phone is its built-in media editor, which makes it easy for users to write multimedia information. If a built-in or external camera is installed, users can also produce PowerPoint-formatted information or electronic postcards and send them to friends or co-workers. At present, this application service has matured, and gradually become the mainstream text message format.

　　EMS

EMS (Enhanced message Service) Enhanced information Services, SMS new version. The advantage of EMS is that in addition to sending text messages like SMS, you can send simple images, sounds and animations, and can still run in the original SMS running network, sending routes and operations are no different. Different brands of mobile phones as long as the support of EMS, can be transmitted to each other EMS photo ringtones.

　　SMS

SMS (short messaging service) is SMS. Is the earliest short message business, is now the highest penetration of a message service, through which the mobile phone can send and receive messages to each other, content in text, digital or binary text-oriented data, the current SMS is only in the phone to create a paragraph after the text sent to friends, simple and easy to use, The length of this text message is limited to 140 bytes.

　　WAP

WAP (Wireless Application Protocol) Wireless Application protocol is an open standard protocol that can be used to transfer information on a network to a mobile phone or other wireless communication terminal. WAP was developed by the Wireless Applications Forum (Pforum), established in 1997 by Motorola, Nokia , Ericsson (ERICSSON) and other communications giants. It uses an HTML-like markup-language WML (Wireless Markup Language) and accesses the general Web page directly via the WAP gateway.

WAP combines internet and mobile phone technology to make access to rich Internet resources to become a reality, but currently, except for a small number of PDA mobile phones, mobile phones can not access these Web sites, but only access to WAP sites.

For example, users can access via mobile phone: http://wap.monternet.com, but not accessible (a768i/a760 can) http://www.monternet.com

　　GPRS

GPRS is General packet Radio service in English abbreviation, Universal Wireless Packet Service, is a GSM system based wireless packet switching technology, providing end-to-end, wide-area wireless IP connectivity. In layman's terms, GPRS is a high-speed data processing technology, the method is to "group" the form of transmission of data to the user hand. GPRS belongs to 2.5 generation mobile communication technology, is the mainstream technology of China Mobile GSM network toward 3G. Relative to the original GSM dial-up mode of circuit exchange data transmission, GPRS is a packet switching technology, with "real-time online", "according to flowmeter fees", "Fast login", "High-speed transmission", "free switch" advantages.

　　2.5G

At present, the 2.5G mobile communication technology that has been commercially applied is the convergence technology from 2G to 3G, this paper breaks through the restriction of the 2G circuit switching technology to the data transmission number rate, introduces the packet switching technology, thus makes the data transmission rate have the qualitative breakthrough, is one kind of transition technology between 2G and 3G. Because 3G is a very large project, so the level of involvement and complex, from the current 2G to 3G can not be linked to the following, so there are between 2G and 3G 2.5G.

Gprs,hscsd,wap,edge, Bluetooth, EPOC and other technologies are 2.5G technology.