White Paper Z500a
| reducing costs. |
| with a PC, PDA or handheld device connected via |
• | WAP over GPRS |
| cable. |
| Access the Internet via WAP at high speed and with a | • | Provide settings |
| constant connection. |
| Receive GPRS configuration settings from the pro- |
• | Email over GPRS |
| vider OTA (over the air), making manual configura- |
| Remain connected to an email system while reading |
| tion unnecessary. |
| and preparing messages, (which are then sent at high | • | |
| speed). |
| Take advantage of full user control in the data con- |
• | Data communication |
| nections menu, establishing multiple descriptions and |
| Transfer data and access the Internet or an intranet |
| accessing advanced settings for GPRS. |
GPRS
The introduction of GPRS was a big step in the evolution of the GSM networks for enhancing the capabilities of data communication. Data traffic has increased (over both wired and wireless networks), with the growth in demand for Internet access and services paralleling that of mobile communications.
We can now see that the demand for
GPRS is able to take advantage of the global coverage of existing GSM networks. Applications developed for GPRS have been deployed on a large scale and have thus reaped the associated benefits.
With GPRS, the Z500a sends data in “packets” at a high speed. The Z500a remains connected to the network at all times, using transmission capacity only when data is sent or received.
Instead of occupying an entire voice channel for the duration of a data session, the Z500a sends and receives data in small packets, as needed, much like IP on the Internet. Thanks to this, the phone is always online, using transmission capacity only when data is sent or received. The phone is compatible with GPRS R99.
The GSM system limits the ability to use all eight time slots, so the phone uses up to four time slots for receiving data, and one slot for transmitting.
Phone identity information and characteristics of the connection are described in the PDP (Packet Data Protocol) context. This information is stored both in the phone and in the mobile network, so that each phone is identified and “visible” to the system.
EDGE
EDGE (Enhanced Data rates for Global Evolution) provides all the benefits of GPRS at significantly higher data rates and enables
The higher data rates are achieved with the use of new modulation schemes on the air interface. Several of the new modulation schemes use
The new modulation schemes may require an upgrade to the RF hardware in all base stations and new mobile stations such as the Z500a. In addition, new re- transmission procedures and packet data channels are introduced with the associated signaling. The Z500a is a class B mobile station meaning it can monitor circuit switched and packet switched services simultaneously but can utilize only one of the services at a time. In addition, it is
15 | June 2004 |
