Key words:
OTA (OVER-THE-AIR Technology) Air Download Technology: It is a technology for remote management of SIM card data and applications through an air interface of mobile communication (GSM or CDMA). The air interface can be used in WAP, GPRS, CDMA1X and short message technology. OTA technology application allows mobile communications not only providing voice and data services, but also provides new business downloads. In this way, applications and content providers can continue to develop services that are more personalized close to user needs, such as information on demand, interactive entertainment, location services, and bank transactions. By downloading technology through OTA air, mobile phone users can download the various service menus provided by the network using the OTA mechanism to the mobile phone according to personal preferences, and can customize the specific business according to their own wishes.
2.5g: It is a transition type based on 2G and 3G. The representative is GPRS. It is improved to the speed and bandwidth than 2G. A simple access to high-speed data packets can be easily implemented with high-speed data packets.
3G: (Third Generation) represents the third generation of mobile communication technology. High-speed, broadband data transmission. International Telecommunications Union (ITU) is called IMT-2000 (International Mobile Telecom-Munications). Up to 2Mbp / s data transfer rate can be provided. Mainstream technology represents CDMA technology representatives with WCDMA (European, Japan), CDMA2000 (US) and TD-SCDMA.
GSM: (Global System for Mobile Communications) Global Mobile Communications System. 2G mainstream technology, data rate is 9.6kb / s.
GPRS: (General Packet Radio Service) Universal Packet Wireless Service. It is a wireless packet switching technology based on GSM system. 2.5G mainstream technology. The highest data rate of 171.2kb / s is 171.2kb / s.
WAP: (Wireless Application Protocol) Wireless Application Protocol. It is a combination of a series of protocols on the wireless internet. Small, narrowband mobile devices such as mobile phones. WAP can run on a variety of wireless networks, such as GSM, GPRS, CDMA, etc.
J2ME: Java 2 Platform Micro Edition In June 1999 is a component of Java2, a highly optimized Java operating environment with a wide range of consumer goods. It is now mainly used to handheld terminal (PDA, mobile phone), TV set-top box.
CLDC: Connected Limited Device Configuration Connection Limit device configuration. The role of the configuration is to determine the JVM J2ME used by the environment is KVM.
MIDP: Mobile Information Devices Profile Mobile Information Device Sketch. J2ME has two brief meters MIDP and the development of MIDP on the Kjava mobile phone. J2ME related vocabulary FAQ
1. J2ME is an abbreviation for Java 2 Platform Micro Edition. June 1999 was born into a component of Java2, a highly optimized Java operating environment with a wide range of consumer goods. It is now mainly used to handheld terminal (PDA, mobile phone), TV set-top box.
2. MIDP: Move information device brief mesh. J2ME has two brief meters MIDP and the development of MIDP on the Kjava mobile phone.
3. CLDC: Connect Limit Device Configuration. The role of the configuration is that the JVM J2ME used by the determination is KVM.
4. J2SE SDK: JDK recommended by J2ME uses version 1.3. 5. Palm: Palm is the name of the handheld computer produced by Palm, and its * is the name of the system. Models often used, such as Palm M505
6. POSE: Palm * Simulator is made on the PC.
Common Wireless Nouns -----------
What is 1G / 2G / 2.5G / 3G
1G (first generation) represents the first generation of mobile communication technology. Such as the mimetion of the mobile network is now eliminated.
2G (Second Generation) represents the second generation of mobile communication technology. The representative is GSM. Taking digital voice transmission technology as the core.
2.5g is a transition type based on 2G and 3G. The representative is GPRS. It is improved to the speed and bandwidth than 2G. A simple access to high-speed data packets can be easily implemented with high-speed data packets.
3G (third generation) represents the third generation of mobile communication technology. High-speed, broadband data transmission. International Telecommunications Union (ITU) is called IMT-2000 (International Mobile Telecom-Munications). Up to 2Mbp / s data transfer rate can be provided. Mainstream technology represents CDMA technology representatives with WCDMA (European, Japan), CDMA2000 (US) and TD-SCDMA.
----------- What is GSM
English abbreviation between global mobile communication system (Global System for Mobile Communications). 2G mainstream technology, data rate is 9.6kb / s.
----------- What is GPRS
General Packet Radio Service (General Packet Radio Service) English abbreviation. It is a wireless packet switching technology based on GSM system. It is a mainstream technology of 2.5G. The highest data rate of 171.2kb / s is 171.2kb / s.
----------- What is UMTS
English abbreviation for UMTS (Universal Mobile Telecommunication System) Universal Mobile Communication System. The European Telecommunication Standards Association (ETSI) is responsible for the standardization of UMTS. And the IMT-2000 coordination responsible for ITU is consistent. It is an important part of ITU IMT-2000. UMTS is assigned by ITU, used for terrestrial and satellite wireless communication. It can be compatible with GSM and IP by moving or fixed, public or private network access. 2MB / s data rate can be supported. ----------- What is CDMA (Note: Here: 3G CDMA) Code Division multicenter abbreviation is currently recognized 3G mainstream technology. There are currently three 3G mainstream CDMA standards, which are WCDMA, CDMA2000, and TD-SCDMA. The first two were proposed by Europe and the United States, and TD-SCDMA was proposed by China (Datang Telecom), which has been accepted by ITU and 3GPP. Where the WCDMA and CDMA2000 are FDD mode, and TD-SCDMA is TDD mode (Note: FDD-frequency division duplex, you need to use two frequency bands to send and receive; TDD-time division duplex, using the same frequency band, but in different time Gap is performed.) ----------- WAP and WML
WAP is an abbreviation for wireless application protocol (Wireless Application Protocal). It is a combination of a series of protocols on the wireless internet. Small, narrowband mobile devices such as mobile phones. WAP can run on a variety of wireless networks, such as GSM, GPRS, CDMA, etc.
WML is an abbreviation for Wireless Makeup Language. Hand supporting WAP technology
The function browsses the Internet content described by WML.
----------- I-MODE and Chtml
I-MODE is a wireless communication service in Japan's Telecom (NTT)'s subsidiary DOCOMO in the Japanese market. Be
The number of people used in the former world (all in Japan) wireless Internet services. Main of I-MODE and WAP
The difference between: i-mode is written in chtml, so the current most network content can be used slightly; and WAP uses WML, existing network content must be converted to WML to be used by WAP. A variant of HTML in chtml (Compact HTML). Most of the HTML is mostly compatible. (Note: I suggest you go to www.nttdocomo.com to see, very COOL.)
----------- Bluetooth (Bluetooth)
Bluetooth is a radio technology that supports short-range communication (typically within 10m). Wireless information exchange can be carried out between many devices including mobile phones, PDAs, wireless headphones, laptops, and related peripherals. Its standard is IEEE802.15. Work at 2.4GHz band. Band width is 1MB / s (Note: Bluetooth This name is very interesting, the name of Scandinavian king of Denmark and Sweden) AD 10 century.) ----------- Wireless Lan
The wireless LAN is developed by the local area network, and the standard is IEEE802.11, IEEE802.11b and IEEE802.11a. Among them, 802.11b operate at 2.4 GHz band with bandwidth of 11 Mbps. 802.11a is defined in the 5GHz band, with a bandwidth is expected to reach 54MB / s. However, accordingly, Wireless LAN is costly, and it is expensive.
----------- Homerf
Homerf mainly designed wireless RF technology for home networks, is the combination of IEEE 802.11 and DECT to reduce costs. Homerf also adopts spread spectrum technology, working at 2.4GHz band, current Homerf's bandwidth is 1 ~ 2MB / s, and the future will increase to 10MB / s. ----------- Syncml
Syncml is a universal mobile data synchronization protocol. The data on the mobile device can be synchronized with remote data using Syncml. The associations developed by companies such as Ericsson, IBM, Lotus, Matshita, Motorola, Nokia, Palm, Psion and Starfish Software.
----------- VoiceXML
VoiceXML (Voice EXTENSIBLE MARKUP LANGUAGE) is an extension of the Scalable Markup Language (XML) defined by the W3C. According to the playback prompt information, the oral command, voice or button sound input, realizes human-computer interaction. The standardization of VoiceXML will simplify the creation of personalized interfaces with voice response services on the Web, enabling people to access information and services on the website via voice and calls.
