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Improve the data rate gsm services edge technical analysis on -gsm data rates edge-hc network broad by dfbd bgrhbtdfd
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Improve the data rate gsm services edge technical analysis on -gsm data rates edge-hc network broad by DFBD BGRHBTDFD
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| Article Posted: 07/28/2011 |
| Article Views: 48 |
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Improve the data rate gsm services edge technical analysis on -gsm data rates edge-hc network broad |
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Business,Business News,Business Opportunities
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In this paper, the characteristics of EDGE, EDGE carrier services, EDGE introduction of GSM mobile operators, the impact of network planning, EDGE data transmission rate assessment, constraints EDGE major factor in large-scale commercial use, EDGE operating conditions in foreign countries, China Mobile to deploy EDGE Overview, EDGE will not feast of national industry into the mainstream of China Mobile in terms of details on the improvement of data rate GSM services (EDGE) technology.
Key words improve data rate, GSM service (EDGE)
Full name in English EDGE Enhanced Data rate for GSMEvolution, the Chinese meaning of GSM services to improve the data rate. The technology is able to use the broadband services that allow networks to use 800,900,1800,1900 MHz band to provide third generation mobile communication network, some features, and can greatly improve the current GSM and TDMA-136 to provide standardized services. The technology can provide 384kb / s wide-area data communication services, and about 2Mb / s for local data communications services, so as to fully meet future bandwidth requirements of wireless multimedia applications.
EDGE concept of Ericsson Company in 1997 for the first time made to the ETSI. While still using EDGE GSM carrier bandwidth and time slot structure, but it can also be used for other cellular communication systems. EDGE can be seen as a provider of high bit rate, the promotion of third-generation cellular mobile system to function effectively in the general evolution of radio interface technologies. On this basis, the Unified Wireless Communication Forum (UWCC) assessed for TDMA/136 of EDGE technology, and in January 1998 approved the technology.
EDGE provides a from GPRS to the third generation mobile communication transitional program, so that existing network operators to make maximum use of existing wireless network equipment to provide users with personal multimedia communication services. As EDGE is a range of existing second generation mobile networks and third-generation mobile networks the transition between the technology, some people call it "2.5G" technology or "2.75G" technology.
1, EDGE features EDGE network construction in the access business and has the following features:
1. In the performance characteristics of access services
(1) the bandwidth can be improved significantly for the single point of access to the peak rate of 2Mb / s, single-slot channel speed up to 48kb / s, so that the peak rate mobile data services to 384kb / s, enables mobile multimedia business.
(2) a more accurate network layer, to provide location services.
2. The characteristics of the network construction
(1) EDGE is a modulation and coding technology that changes the rate of air interface.
(2) EDGE air distribution channel, TDMA frame structure of GSM air interface characteristics and the same.
(3) EDGE or GPRS network without changing the structure of GSM not introduce new network elements, except the BTS upgrade.
(4) core network using 3-layer model: application layer, communication layer and the communication link control layer, the interface between layers is standardized. Hierarchical structure can be used to make the call independent control and communication links, which can give full play to the advantage of packet switching networks, so that traffic and bandwidth allocation more closely, in particular, to adapt to VoIP services.
(5) the introduction of the media gateway (MGW). MGW with STP functionality, IP networks can be achieved in the formation of the signaling network (VPN needs support). Furthermore, MGW both circuit-switched services and GSM-PSTN interface is wireless access network, 3G core network interface.
(6) EDGE high rate of existing GSM network mainly uses Gaussian minimum frequency shift keying (GMSK) modulation technology, EDGE uses 8 Phase Shift Keying (8PSK) modulation in the mobile environment can be stabilized to 384kb / s, even in the static environment to 2Mb / s, basically to meet the needs of a variety of wireless applications. I am a professional writer from China Manufacturers, which contains a great deal of information about used carver yachts , old fiberglass boats, welcome to visit!
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