[电子信息工程]本科论文英文文献翻译.doc

夕卜文资料翻译学院:系（专业）:班级:姓名:学号:电子工程学院电子信息工程电子061指导教师评语：签名： :外文原文3G TECHNOLOGYAlthough the technology behind 3G may seem complicated, the ways in which 3G will affect all of our lives are easy to imagine. Just imagine having a combined camera, videocamera, computer, stereo, and radio included in your mobile phone. Rich-media information and entertainment will be at your fingertips whenever you want anywhere there is a wireless network・Mobile communication is moving from simple voice to rich media, where we use more of our senses to intensify our experiences.But not all of this will happen at once. 3G is an evolution to a communications ideal that no one completely understands yet. What we do know is that mobile multimedia will hit the Japanese markets in 2001, and Europe and North America will follow soon after.3G brings together high-speed radio access and IP-based services into one, powerful environment. The step towards IP is vital. IP is packet-based, which in simple terms, means users can be non line" at all times, but without having to pay until we actually send or receive data. The connectionless nature of IP also makes access a lot faster: file downloads can take a few seconds and we can be connected to our corporate network with a single click.3G introduces wideband radio communications, with access speeds of up to 2Mbit/s. Compared with today's mobile networks, 3G will significantly boost network capacity - so operators will be able to support more users, as well as offer more sophisticated services.3G - At home3G is going to affect our home and social lives in many ways. The services that 3G enables will help us to manage our personal information, simplify tasks such as grocery shopping, make better use of our time and offer services that are just fun to use. Operators will be able to develop myriad new service opportunities to attract and retain new customers. Here are some examples:• YouTe sitting on a train and use this ndeadM time to log on to your bank account, check your balance and pay a few bills - all through your 3G device. You save time and can be smarter about managing your finances.• On a touring vacation, you arrive in a new city. You haven't made any reservations in advance, because you can do this when you get there, by using your 3G handset to obtain up-to-date information, including hotel vacancies. Having booked a room, you can use your mobile to view video clips of local tourist attractions and talk to someone from the local tourist information bureau at the same time.3G ■ At work3G will not just support the needs of businesspeople who travel a lot, but will also help new, flexible working practices, such as home-working and remote access to corporate networks outside traditional working hours. Businesspeople are often high-volume airtime users, so they represent a big opportunity for mobile operators. Here are some examples:• At work you receive a message from your HsmartH refrigerator at home・ The message tells you that certain items need restocking and an order has already been prepared for the local grocery store, which you can approve, so that your groceries are ready to collect on the way home.• You are on the road, and urgently need to discuss a draft presentation with a number of colleagues back in the office・ Pulling into a service station, you use your 3G device to hold a telemeeting with your colleagues and, at the same time, you can all view the draft presentation and make changes on line.• A maintenance engineer is repairing some equipment on a client's premises and hits a problem. Using his 3G device, he contacts his department and downloads a demonstration video that guides him through the repair process.TECHNOLOGY3G brings together two powerful forces: wideband radio communications and IP-based services. Together, these lay the groundwork for advanced Mobile Internet services, including personalized portals, ninfotainment,\ mobile commerce and unified messaging -encompassing high-speed data, superior quality voice and video and location-based services.Making 3G a reality depends on technology developments in different areas. These include amendments to the radio interface to support wideband communications and in the core network. Supporting technologies, such as WAP and Bluetooth, also have an important role to play. This section provides a brief overview of some of the main technologies and developments involved. Ericsson supports all of these technologies and has played an active role in their development.GPRSGeneral Packet Radio Service (GPRS) is an enhancement to existing GSM and TDMA networks that introduces packet data transmission, enabling nalways onH mobility. This means that users can choose to be permanently logged on to e-mail, Internet access and other services, but do not have to pay for these services unless sending or receiving information. When EDGE is added to GPRS, these data。