Do you think that Kobe is the best player in NBA now?
May 28, 2007 6:35am CST
I think he is the best!
29 May 07
Everybody know about Sms , but do you know this.......26 Short Message Service SMS appeared on the wireless scene in 1991 in Europe, where digital wireless technology first took root. The European standard for digital wireless, now known as the global standard for mobiles (GSM), included short messaging services from the outset. In North America, SMS was initially made available on digital wireless networks built by early pioneers such as BellSouth Mobility and Nextel. In 1998, when the buildout of personal communications service (PCS) networks based on GSM, code division multiple access (CDMA), and time division multiple access (TDMA) methods was completed, SMS enjoyed full-fledged deployment. The point-to-point SMS provides a mechanism for transmitting short messages to and from wireless handsets. The service makes use of a short message service center (SMSC), which acts as a store-and-forward system for short messages. The wireless network provides for the transport of short messages between the SMSCs and wireless handsets. In contrast to existing text message transmission services such as alphanumeric paging, the service elements are designed to provide guaranteed delivery of text messages to the destination. A distinguishing characteristic of the service is that an active mobile handset is able to receive or submit a short message at any time, independent of whether or not a voice or data call is in progress. SMS also guarantees delivery of the short message by the network. Temporary failures are identified, and the short message is stored in the network until the destination becomes available. SMS is characterized by out-of-band packet delivery and low-bandwidth message transfer. Initial applications of SMS focused on eliminating alphanumeric pagers by permitting two-way general-purpose messaging and notification services, primarily for voice mail. As technology and networks matured, a variety of services were introduced, including electronic mail and fax integration, paging integration, interactive banking, and information services such as stock quotes. Wireless data applications include downloading of subscriber identity module (SIM) cards for activation, debit, and profile-editing purposes. 2. Benefits of Short Message Service In today's competitive world, differentiation is a significant factor in the success of the service provider. Once the basic services, such as voice telephony, are deployed, SMS provides a powerful vehicle for service differentiation. The benefits of SMS to the service provider are as follows: • increased call completion on wireless and wireline networks by leveraging the notification capabilities of SMS • an alternative to alphanumeric paging services • enabling wireless data access for corporate users • provision of value-added services such as e-mail, voice mail, and fax mail integration; reminder service; stock and currency quotes; and airline schedules • provision of key administrative services such as advice of charge, overthe- air downloading, and service provisioning All of these benefits are attainable quickly with modest incremental cost, and typical investment payback periods are less than six months. The benefits of SMS to subscribers center around convenience, flexibility, and seamless integration of messaging services and data access. From this perspective, the benefit is to be able to use the handset as an extension of the computer. SMS also eliminates the need for separate devices for messaging, as services can be integrated into a single wireless device—the mobile terminal.