Mobile Video
Mobile Video and the Connection between Short Message System (SMS) and Global System for Mobile Communications (GSM), and the Advancement Toward Multimedia Messaging Service (MMS)
Exchanging SMS messages, technically identified as Short Message System (SMS), but also acknowledged as “texting”, is a straightforward, easy, and handy means to communicate to and from mobiles. Not just a very good method for people to keep in touch, text messages can be a practical manner for software applications to exchange simple messages, and even setup commands, to and from mobile devices. SMS does not require a direct connection between smartphones; the communications infrastructure for the process is already in place, and it functions across most cellular networks. One feature of SMS text messaging that makes it especially sensible for mobile software programs is that it uses smartphone fixed identity, the phone number. This feature provide a unique benefit over other technologies that utilize IP addresses because a cell phone IP address will vary depending on current network.
Short Message Service (SMS) is a communication service component of the GSM mobile communication system. It utilizes uniform communications rules that allow incoming and outgoing short text messages between smartphones. SMS text messaging is the most commonly used data application around the globe, boasting almost two and a half billion active users, or almost 75% of all cellular phone subscribers.
SMS text messaging as used on modern mobile devices was initially defined as part of the Global System for Mobile Communications (GSM) series of protocols in 1985 as a system of sending texts of up to 160 characters, to and from GSM mobile handsets. Since the mid-eighties service support has expanded to include other mobile technologies such as ANSI CDMA networks and Digital AMPS, as well as satellite and landline networks. The majority of SMS messages are mobile-to-mobile text messages, though the standard supports other kinds of broadcast messaging as well. Computer to mobile SMS text messaging capabilities are also growing rapidly.
Global System for Mobile Communications was initially named Groupe Spécial Mobile. It is the most accepted standard for mobile telephone systems around the globe. The GSM Association, the promoting industry association of mobile phone operators and manufacturers, estimates that about 80% of the global mobile market uses it. GSM is enjoyed by over 3 billion people across more than two hundred countries and territories. Its pervasiveness enables international roaming agreements between mobile phone operators, providing subscribers the benefit of their smartphones all over the world. GSM differs from its predecessor technologies demonstrated by the fact that both signaling and speech channels are digital. Thus GSM is thought of as a second generation (2G) mobile phone system. This also facilitates the wide-spread deployment of data communication programs.
Newer versions of the standard are backward-compatible with the initial GSM system. Release ‘97 of the standard added packet data capabilities by means of General Packet Radio Service (GPRS). Release ‘99 launched higher speed data transmission using Enhanced Data Rates for GSM Evolution (EDGE).
mobile video
General packet radio service (GPRS) is a packet oriented mobile data service available to users of the 2G and 3G GSM. In 2G systems. GPRS data communication is usually billed per megabyte of traffictransferred, while data transfer using traditional circuit switching is billed per unit of connection time, without consideration of whether or not the subscriber actually is using the capacity or if it is idle. GPRS is a best-effort packet switched service, as opposed to circuit switching, that has assured quality of service during the connection for non-mobile users.
2G cellular systems combined with GPRS are often referred to as 2.5G. 2.5G is a technology bridge between the second (2G) and third (3G) generations of mobile device telephony. It delivers moderate-speed data transfer, by using unused time division multiple access (TDMA) channels. Originally it was intended to broaden GPRS to cover other standards, but these networks are converting to the GSM standard. GPRS is integrated into GSM Release 97 and newer releases.
GPRS was created as a GSM reaction to the earlier CDPD and i-mode packet switched cellular technologies. Cellular Digital Packet Data (CDPD) was a wide-area mobile data service which used unused bandwidth normally used by AMPS mobile phones. The service was discontinued in conjunction with the retirement of the parent AMPS service.
CDPD was developed in the early 1990’s, and was seen as a future technology. But, it had competition from existing slower but cheaper Mobitex and DataTac systems. CDPD never gained common acceptance and in time newer, faster standards such as GPRS gained widespread acceptance and started dominating.
For consumers CDPD had very limited offerings. AT&T Wireless initially sold the technology in the America under the brandname PocketNet, one of the very first consumer wireless web service offers. Cingular Wireless later offered CDPD under the Wireless Internet brand (as opposed to Wireless Internet Express, Cingular Wireless GPRS/EDGE data). AT&T Wireless PocketNet failed as a product launch. But, CDPD was adopted into several enterprise and government networks. It was particularly successful as a first-generation wireless data solution for telemetry devices (machine to machine communications) and for public safety mobile data terminals.
Enhanced Data Rates for GSM Evolution (EDGE) (also referred to as Enhanced GPRS (EGPRS), or IMT Single Carrier (IMT-SC), and Enhanced Data Rates for Global Evolution) is a backward-compatible digital mobile technology that allows superior data transmission rates on top of standard GSM. EDGE is considered a 3G radio technology. EDGE supplies more than three-fold improvement in both the capacity and performance of GSM/GPRS networks by utilizing sophisticated systems of coding and transmitting data, that deliver higher bit-rates per radio channel. EDGE delivers broadband performance and supports high bandwidth data applications such as Multimedia Messaging Service (MMS).
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