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As EDGE is a GSM based technology and provides an enhancement for GPRS at a little additional cost it is considered the best way in which to capitalize on existing resources. [1] 7.1.1. Radio Access Network In most cases GPRS enabled base stations and BSC's can be simply upgraded to EDGE by way of relatively low-cost software and hardware upgrades, which will pro-long the life cycle of the deployed RAN elements. 7.1.2. Core Network For GPRS enhancement, there is very little modification to be completed within a GPRS enabled core network, thus enhancing the sunk core network investment. 7.1.3. Antenna Sites There is no requirement for additional antenna sites when deploying EDGE.
Assuming high quality linear amplifiers with high RF output power are used within the BTS, the coverage pattern will be the same as the existing GPRS deployment, so protecting existing site investment. 7.1.4. Spectrum Utilization EDGE triples the GPRS data capacity whilst using the existing GSM spectrum and offers up to three times the GPRS data rate to the end user. EDGE is spectrally the most efficient radio technology for data applications requiring up to 100Kb / s throughput (compared to CDMA and WCDMA), and only WCDMA is spectrally better for higher throughputs. 7.1.5. Applications GPRS enabled applications and services will generally not require any additional investment to become EDGE compatible.
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This is also valid for known WCDMA applications. Although the financial benefits of EDGE can be attributed to individual network elements as outlined above, one of the main business drivers is that EDGE forms an essential part of the overall GSM evolution towards a seamless multi-radio GSM / GPRS / EDGE / WCDMA network. As mentioned previously GSM is the main standard for cellular communications worldwide and the business benefits of deploying an industry standard technology can be seen in almost every aspect of a network deployment, from end-user devices, to applications to hardware.
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7.2. For Operator Operators can also experience the advantages of EDGE in following ways. 7.2.1. Migration to wireless multimedia services The operator can increase data revenues by offering attractive types applications to end-users. 7.2.2. Improved customer satisfaction Increased data capacity and higher data throughput will decrease response times for all data services, thus keeping end users satisfied and connected.
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7.2.3. Early deployment of 3G type applications EDGE networks are expected to emerge in year 2001, when mature markets are likely to start demanding multimedia applications. 7.2.4. Quick network implementation EDGE will not require network elements and EDGE capability can be introduced gradually to the network. 7.3. For User 7.3.1. Improved quality of service Increased data capacity and higher data throughput will always satisfy the customers' need for QoS. 7.3.2. Personal multimedia services Attractive types of applications and terminals will become available.
7.3.3. Potentially lower price per bit Lower cost of data capacity for high-speed data applications gives the operator flexibility in pricing. 8. Conclusion While the tug of war between access technologies – CDMA vs. UMTS vs. GSM – continues to be debated globally, EDGE provides an ideal solution for GSM carriers to add data capacity using limited spectrum. Keeping in view the fact that GSM supports more subscribers today than any other access technology (roughly 65 to 70% of the global subscriber market), and that GSM / GPRS operators are scrambling to add capacity to support user growth and launch next generation data services , the increased capacity and throughput offered by EDGE becomes very compelling.
And, in a market where wireless carriers must squeeze the most out of capital outlays – past and future, it is no real surprise that we are going to see a reed wave of interest in EDGE from our GSM customers. Today the position of EDGE as a technology evolution of GSM is clear.
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