移動通信技術發(fā)展趨勢-wenkub
2023-07-10 03:25:36 本頁面
【正文】 一種開放的通用標準,實現(xiàn)了IP與GSM網絡的橋接,是一個為廠商提供加速市場增長、避免網絡割接、保護運營商投資的標準,WAP確保任何與WAP兼容的GSM手機都能工作。 。EDGE(增強數(shù)據(jù)速率GSM改進模式)使用修改過的GSM調制方式來實現(xiàn)超過300kbit/s的數(shù)據(jù)速率。個人移動多媒體將根據(jù)地點為人們提供無法想像的、完善的個人業(yè)務和無線信息,將對人們工作和生活的各個方面產生影響。像無線會議電視這樣的應用將隨處可見,電子商務將蓬勃開展。第一代無線網絡技術的一大成就就是去掉了將電話連接到網絡的用戶線。四、網絡技術的智能化移動網絡由單純地傳遞和交換信息,逐步向存儲和處理信息的智能化發(fā)展,移動智能網由此而生。1998年4月,ITUT在新推出的智能網能力集一2標準中描述了移動接入的功能實體,稱為CAMEL phase2標準。 伴隨著移動網絡向第三代系統(tǒng)的演進,網絡的智能化程度也在不斷地提升。我國目前的模擬TACS系統(tǒng)的使用頻段也為900 MHz。六、網絡趨于融合,走向統(tǒng)一心骨干層和接八層組成、業(yè)務與網絡分離的構架。s intellectualization, a higher frequency band, the more effective use frequency, the network tends the fusion, the trend unification. The understanding, grasps these tendencies has the vital practical significance to the mobile munication operator and the equipment manufacturer. Keywords ： Mobile munication Internet Wireless data IMT2000 Intelligent network Network fusion Mobile munication39。 Other one kind is the packet switching migration data traffic, like Motorola39。s main driving influence lies in the user the application. The voice is sole, easy the service which is accepted by the populace, however the wireless data is different, the wireless data initial application key places transportation management such professional market. In the near future the wireless data traffic39。s this kind of life style change the important attribute. （1）Internet39。s demand in the movement to grow. In order to satisfy turns on Internet39。s mercial value and the consumer market obtained the proof, the whole world moved the market to grow by the unusual speed. The mobile munication evolution39。s great achievement removed has connected the telephone the network the subscriber39。s research, as early as started in 1995, just started the concrete standard agreement not to appear, various manufacturers have formulated own standard respectively, and has carried on many research works according to the above, like Alcatel, Nortel, Ericsson and so on successively have promoted own initial period product. These work to move the intelligent network standard the formation to gain in the experience finally. at the end of 1997, American honeyb Telemunication industries association (CTIA) has formulated the motion intelligent network first standard agreement IS41D agreement. in January, 1998, European Telemunications Standard Research institute (ETSI) stage has introduced the CAMEL agreement in GSM the phase2+ (mobile munication highlevel logic customization application procedure), edition was Phase1. in April, 1998, ITUT was promoting newly in intelligent network ability collection 2 standards described the motion turning on function entity, was called CAMEL the phase2 standard. Follows is moving the network to the third generation system39。s start use frequency band is 900MHz, IS95 the CDMA system is 800MHz. To fundamentally enhance the GSM system39。s relaxation will make the puter net, the telemunication network, the television network and so on to speed up bes in one friendly, the wide band IP technology bees th
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