Wireless Master

(EDGE) Enhanced data for global evolution or Enhanced GPRS (EGPRS) or IMT Single Carrier (IMT-SC) is a speedy mobile data transmission technology, projected to permit second-generation global system for mobile communication and time division multiple access networks to send out data at up to 384 kilobits per second. It was called GSM384 as it was developed for GSM systems in 2003 primarily by Cingular (AT & T) in the United States. With the advancement, it offers a very good increase in power of GSM networks.

By changing the type of modulation used, EDGE provides speed enhancements that make a better use of the carrier currently used, the 200kHz carrier in GSM systems is an example. For the third-generation IMT-2000-complaint systems EDGE provides a groundbreaking path, such as (UMTS) Universal Mobile Telephone Systems, by executing some of the changes anticipated in the later application in third-generation systems.

Edge constructs upon the developments that are provided by technologies that are presently being set up such as, general packet radio service (GPRS) and high-speed circuit switched data (HSCSD) systems, allowing a superior data-transmission speed to be attained at an improved state, particularly near the base stations, with the implementation of an eight-phase-shift keying (8 PSK).

For the efficient use of EDGE, it should be set up alongside the packet-switching upgrades that are used for GPRS, necessitating the addition of two kinds of nodes to the network such as, the gateway GPRS service node (GGSN) and the serving GPRS service node (SGSN). Packet-switched networks like internet protocol (IP) and X25, alongside other GPRS networks are connected by the GGSN, whilst packet-switched link to mobile stations are provided by the SGSN

Just one EDGE transceiver unit requires being included in each cell for the additional application of EDGE systems, with the distant software upgrades being accepted by the base stations. By switching to the EDGE mode automatically, it can co-exist with the existing GSM traffic.

Gaussian minimum-shift keying (GMSK) is the modulation technique that GPRS is based on. Though if this modulation technique is established into EDGE systems, would not allow a high bit rate across the air interface which would be an 8 PSK modulation. 8 PSK offers the fastest transfer rates close to the base stations by automatically adjusting to the local radio conditions. For every carrier phase change, EDGE generates a 3-bit word that successfully increases the gross data rate by three times that are offered by GSM. The usage of rate adaptation algorithm helps EDGE to adapt the modulation and coding scheme (MCS) according to the quality of the radio channel. Incremental Redundancy, a new technology that is used to send more redundancy data to be joined in the receiver increases the possibility of decoding, correctly.

EDGE, if compared to standard GPRS can manage four times the traffic. As part of the IMT-2000 family of 3G standards, EDGE has been accepted and is being regarded as a 3G radio technology. With the specification of EDGE, achieving higher data-rates within existing GSM timeslots have become easier.