| GGSN |
Gateway GPRS Support Node |
A gateway from a cellular network to an IP network. |
| GHz |
Gigahertz |
A frequency measurement which equals one billion hertz. |
| GMSK |
Gaussian Minimum Shift Keying |
|
| GOS |
Grade of Service |
A measure of the success a subscriber is expected to have in accessing a network to complete a call. The grade of service is usually expressed as percentage of calls attempted by the subscriber during the busy-hour that are blocked due to insufficient network resources. |
| GPRS |
General Packet Radio Service |
A packet-linked technology that enables high-speed (115 kilobit per second) wireless Internet and other data communications over a GSM network. It is considered an efficient use of limited bandwidth and is particularly suited for sending and receiving small bursts of data. |
| GPRS physical interfaces |
|
Physical interfaces new with GPRS include the Gb interface,which connects
the SGSN to the PCU and is usually located in the base station subsystem
(BSS); the Gn and Gp interfaces,which connect GGSNs and SGSNs to each other;
and the Gc,Gd,Gr,and Gs interfaces, which carry SS7-based protocols. |
| GPS |
Global Positioning System |
A worldwide radio-navigation system that was developed by the US. Department of Defense. In addition to military purposes it is widely used in marine and terrestrial navigation (for example car navigation systems). |
| GSM |
Global System for Mobile Communication |
Originally developed as a pan-European standard for digital mobile telephony, GSM has become the world’s most widely used mobile system. It is used on the 900 MHz and 1800 MHz frequencies in Europe, Asia and Australia, and the MHz 1900 frequency in North America and Latin America. |
| GSM 1800 |
A digital network working on a frequency of 1800 MHz. |
It is used in Europe, Asia-Pacific and Australia. Also known as DCS 1800 or
PCN. |
| GSM 1900 |
A digital network working on a frequency of 1900 MHz. |
It is used in the US and Canada and is scheduled for parts of Latin America and Africa. Also known as PCS 1900. |
| GSM 900 |
|
GSM 900, or just GSM, is the world's most widely used digital network and now operating in over 100 countries around the world, particularly in Europe and Asia Pacific. |
| GTP |
GPRS Tunneling Protocol |
A protocol similar to IP that is used by the GPRS backbone network for
packet switching. |
| guard band |
|
A set of frequencies or band-width used to prevent adjacent systems from interfering with each other. Guard bands are typically used between different types of systems at the edges of the frequency allocations. |
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