【正文】
開發(fā)的路由協(xié)議派生為先應(yīng)式和反應(yīng)式路由協(xié)議 [4]。 architecture in place of conventional 3G architectures. The other main impetus to ad hoc works es from the rapidly improving munications munication devices are getting smaller, cheaper, more sophisticated, and hence more of these technologies for better ad hoc working gives rise to new problems that point to new research. For instance, the use of smart antennas in ad hoc working requires new medium access and neighbor discovery ability to dynamically alter spread spectrum codes, modulation schemes, and waveforms require corresponding innovations at the higher layers. Software radios, which represent an important change in radio architecture, offer more flexibility that is suitable for ad hoc works. How are ad hoc works likely to evolve? It is likely that the nodes themselves will be smaller,cheaper, more capable and probably conformal,and e in all forms. Indoor ad hoc works (perhaps based on Bluetooth, Wireless LAN, or similar technologies) will probably be used to connect smart appliances to the Inter. Meshbased lastmile solutions will increase in popularity and may even be the dominant ad hoc works will have higher capacities and support multimedia applications,be more adaptive, stealthy, and evolve toward a system where all battlefield elements, mobile or stationary, are multimediaworked. Finally, there is the utopian idea of a global infosphere where all work elements form a gigantic ad hoc wireless work using unlicensed spectrum, bypassing the existing fascinating from a research viewpoint, the realization of this vision will depend not only on overing the capacity and other hurdles, but also the pragmatics of a cooperative work. Notwithstanding our predictions,however, like the Inter, which existed for more than 20 years before the World Wide Web came along, it may be a surprise killer app that shapes the future of ad hoc working. 6 二、英文翻譯 ad hoc 網(wǎng)絡(luò)的一個簡要概述:挑戰(zhàn)與研究方向 ad hoc 網(wǎng)絡(luò)已成為當(dāng)今最為鮮明活躍的一個新的領(lǐng)域,在這個領(lǐng)域已經(jīng)將近有 30 年的重點研究下命名為 “ 分組無線網(wǎng) ” 或 “ 多跳網(wǎng)絡(luò) ” 。 an infrastructureless work of notebook puters in a conference or campus setting。 ad hoc 網(wǎng)絡(luò)適合在以下情況下使用,要么是沒有固定的基礎(chǔ)設(shè)施可用的場合,要么在緊急情況下沒有依賴的場合,一些應(yīng)用的例子包括:在野戰(zhàn)軍用通信應(yīng)用方面;散布在一個城市的生物的傳感器檢測;在會議或校園內(nèi)的一個無筆記本計算機的通信設(shè)施的網(wǎng)絡(luò);林業(yè)和木材工業(yè);稀有 動物跟蹤;太空探索;海底作業(yè);臨時辦公,比如總統(tǒng)的競選。這種節(jié)能的想法在 ad hoc 網(wǎng)絡(luò)已成為一個重要的問題。為量化需要特別的系統(tǒng)性能,我們對這些緊密相關(guān)的模型進行了分析比較,一個常見的諸如反射、折射、射頻輻射和散 射的基本的物理過程的理解是相當(dāng)容易的 ,但卻很難量化 ,包括大量的復(fù)雜的對象,如樹葉、汽車、建筑。室內(nèi) ad hoc 網(wǎng)絡(luò) (也許是基于藍(lán)牙 技術(shù)的 無線局域網(wǎng)或類似的技術(shù) )可能會被用于智能電器到互聯(lián)網(wǎng)上的連接。 y=0。 d1(1:j)=d。 j=j+1。 y=y+v*t*sin(dir)。 v=rand(1)*5+10。 counter2=0。無線通信設(shè)備變得更小、更廉價、更精細(xì),因此更為普遍。此外,由于很大一部分網(wǎng)絡(luò)節(jié)點的動態(tài)重配置和鄰居分組轉(zhuǎn)發(fā)容易被注入偽網(wǎng)絡(luò)控制業(yè)務(wù)中。 到了 20 世紀(jì) 90 年代中期,隨著 ad hoc 組網(wǎng)熱潮的到來,涌現(xiàn)了一系列標(biāo)準(zhǔn)活動和商業(yè)標(biāo)準(zhǔn)。39。 the forestry or lumber industry。 歷史 ad hoc 網(wǎng)絡(luò)技術(shù)的起源可以追溯到 1972 年的美國國防部高級研究計劃局資助研究的戰(zhàn)場環(huán)境中的無線分組數(shù)據(jù)網(wǎng)( PRNET) [1],在 20 世紀(jì) 80 年代初發(fā)展成為具有抗毀性和自適應(yīng)能力的網(wǎng)絡(luò)( SURNAN)項目。令人驚訝的是直到最近才有一些有關(guān) ad hoc 網(wǎng)絡(luò)的能源效率方面的發(fā)表著作。相比之下,與移動節(jié)點的通信流模式可以肯定很容易進行詳細(xì)描述,但依賴于目標(biāo)程序,缺乏現(xiàn)有系統(tǒng)的有效研究,連接性、 移動性和應(yīng)用程序之間的可能相互作用,將導(dǎo)致現(xiàn)有模型的含糊不清。基于網(wǎng)格的最后一英里解決方案將會增加受歡迎程度,甚至可能是占主導(dǎo)地位的解決方案。 j=1。 if (d1(1:j)=107)amp。 break end end end m=counter3/counter2。 end x=x+v*t*cos(dir)。 if T==T1 dir=rand(1)*2*pi。 ( 2) L3, L2 切換 clear。 ad hoc 網(wǎng)絡(luò)其他主要動