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數據傳輸可以簡單地分為有線(包括架設光纜、電纜或租用電信專線)和無線(分為建立專用無線數據傳輸係統或借用CDPD、 GSM、CDMA 等公用網信息平台)兩大類方式。 相(xiang)比(bi)較(jiao)而(er)言(yan),用(yong)無(wu)線(xian)數(shu)傳(chuan)模(mo)塊(kuai)建(jian)立(li)專(zhuan)用(yong)無(wu)線(xian)數(shu)據(ju)傳(chuan)輸(shu)方(fang)式(shi)比(bi)其(qi)它(ta)方(fang)式(shi)具(ju)有(you)如(ru)下(xia)優(you)點(dian),下(xia)麵(mian)介(jie)紹(shao)一(yi)下(xia)用(yong)無(wu)線(xian)數(shu)傳(chuan)模(mo)塊(kuai)建(jian)立(li)專(zhuan)用(yong)無(wu)線(xian)數(shu)據(ju)傳(chuan)輸(shu)方(fang)式(shi)相(xiang)比(bi)於(yu)有(you)線(xian)通(tong)訊(xun)的(de)優(you)點(dian)。 1. 成本廉價 有線通信方式的建立必須架設電纜,或挖掘電纜溝,因此需要大量的人力和物力;而er用yong無wu線xian數shu傳chuan電dian台tai建jian立li專zhuan用yong無wu線xian數shu據ju傳chuan輸shu方fang式shi則ze無wu需xu架jia設she電dian纜lan或huo挖wa掘jue電dian纜lan溝gou,隻zhi需xu要yao在zai每mei個ge終zhong端duan連lian接jie無wu線xian數shu傳chuan電dian台tai和he架jia設she適shi當dang高gao度du的de天tian線xian就jiu可ke以yi了le。相xiang比bi之zhi下xia用yong無wu線xian數shu傳chuan模mo塊kuai建jian立li專zhuan用yong無wu線xian數shu據ju傳chuan輸shu方fang式shi,節jie省sheng了le人ren力li物wu力li,投tou資zi是shi相xiang當dang節jie省sheng的de。 當(dang)然(ran)在(zai)一(yi)些(xie)近(jin)距(ju)離(li)的(de)數(shu)據(ju)通(tong)訊(xun)係(xi)統(tong)中(zhong),無(wu)線(xian)的(de)通(tong)訊(xun)方(fang)式(shi)並(bing)不(bu)比(bi)有(you)線(xian)的(de)方(fang)式(shi)成(cheng)本(ben)低(di),但(dan)是(shi)有(you)時(shi)候(hou)實(shi)際(ji)的(de)現(xian)場(chang)環(huan)境(jing)難(nan)以(yi)布(bu)線(xian),客(ke)戶(hu)根(gen)據(ju)現(xian)場(chang)環(huan)境(jing)的(de)需(xu)要(yao)還(hai)是(shi)會(hui)選(xuan)用(yong)無(wu)線(xian)的(de)方(fang)式(shi)來(lai)實(shi)現(xian)通(tong)訊(xun)。 2. 建設工程周期短 當dang要yao把ba相xiang距ju數shu公gong裏li到dao數shu十shi公gong裏li距ju離li的de遠yuan程cheng站zhan點dian相xiang互hu連lian接jie通tong訊xun的de時shi候hou,采cai用yong有you線xian的de方fang式shi,必bi須xu架jia設she長chang距ju離li的de電dian纜lan或huo者zhe挖wa掘jue漫man長chang的de電dian纜lan溝gou,這zhe個ge工gong程cheng周zhou期qi可ke能neng就jiu需xu要yao數shu個ge月yue的de時shi間jian,而er用yong數shu傳chuan模mo塊kuai建jian立li專zhuan用yong無wu線xian數shu據ju傳chuan輸shu的de方fang式shi,隻zhi需xu要yao架jia設she適shi當dang高gao度du的de天tian線xian,工gong程cheng周zhou期qi隻zhi需xu要yao幾ji天tian或huo者zhe幾ji周zhou就jiu可ke以yi,相xiang比bi之zhi下xia,無wu線xian的de方fang式shi可ke以yi迅xun速su組zu建jian起qi通tong信xin鏈lian路lu,工gong程cheng周zhou期qi大da大da縮suo短duan。 3. 適應性好 有線通訊的局限性太大,在遇到一些特殊的應用環境,比如遇到山地、湖泊、linqudengteshudedilihuanjinghuoshiyidongwutidengbuxianbijiaokunnandeyingyonghuanjingdeshihou,jiangduiyouxianwangluodebuxiangongchengyouzhejiqiangdezhiyueli,eryongwuxianshuchuanmokuaijianlizhuanyongwuxianshujuchuanshufangshijiangbushouzhexiexianzhi,suoyishuoyongwuxianshuchuanmokuaijianlizhuanyongwuxianshujuchuanshufangshijiangbiyouxiantongxunyougenghaodegengguangfandeshiyingxing,jihubushoudilihuanjingxianzhi。 4. 擴展性好 zaiyonghuzujianhaoyigetongxunwangluozhihou,changchangyinweixitongdexuyaozengjiaxindeshebei。ruguocaiyongyouxiandefangshi,xuyaozhongxindebuxian,shigongbijiaomafan,erqiehaiyoukenengpohuaiyuanlaidetongxunxianlu,danshiruguocaiyongwuxianshuchuandiantaijianlizhuanyongwuxianshujuchuanshufangshi,zhixujiangxinzengshebeiyuwuxianshuchuandiantaixianglianjiejiukeyishixianxitongdekuochongle,xiangbizhixiayougenghaodekuozhanxing。 5. 設備維護上更容易實現 有(you)線(xian)通(tong)訊(xun)鏈(lian)路(lu)的(de)維(wei)護(hu)需(xu)沿(yan)線(xian)路(lu)檢(jian)查(zha),出(chu)現(xian)故(gu)障(zhang)時(shi),一(yi)般(ban)很(hen)難(nan)及(ji)時(shi)找(zhao)出(chu)故(gu)障(zhang)點(dian),而(er)采(cai)用(yong)無(wu)線(xian)數(shu)傳(chuan)模(mo)塊(kuai)建(jian)立(li)專(zhuan)用(yong)無(wu)線(xian)數(shu)據(ju)傳(chuan)輸(shu)方(fang)式(shi)隻(zhi)需(xu)維(wei)護(hu)數(shu)傳(chuan)模(mo)塊(kuai),出(chu)現(xian)故(gu)障(zhang)時(shi)則(ze)能(neng)快(kuai)速(su)找(zhao)出(chu)原(yuan)因(yin),恢(hui)複(fu)線(xian)路(lu)正(zheng)常(chang)運(yun)行(xing)。
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