
[計][通信] 異步傳輸模式
Wireless ATM is the result of development of asynchronous transfer mode technology and mobile communication technology.
無線ATM是異步轉移模式(ATM)技術和移動通信技術發展的産物。
Asynchronous transfer mode (ATM), as the new switching and multiplexing technology, is selected by ITU-T as the core theory of B-ISDN.
異步轉移模式ATM作為一種新的交換和複接體制,已經被國際電聯ITU挑選為寬帶綜合業務數字網B—ISDN的核心技術。
This paper explores the application of the genetic neural network (GNN) in the link capacity control of the asynchronous transfer mode (ATM).
研究遺傳神經網絡算法在異步轉移模式(ATM)鍊路容量分配中的應用。
The introduction of the asynchronous transfer mode (ATM)concept has significantly influenced the coding of video services.
異步轉移模式(ATM)概念的提出對編碼技術産生了重大的影響。
Transport of voice over asynchronous transfer mode (ATM) network is now an urgent task in ATM technical development.
分析了實現ATM網中話音通信的各項技術的特點。
ATM (Asynchronous Transfer Mode) which is the supporting technology of B-ISDN is confirmed by ITU in 1988.
異步轉移模式(ATM) 技術是B-ISDN的支撐技術,于1988 年被标準化組織ITU确定。
Because it is an asynchronous mechanism, ATM differs from synchronous transfer mode methods, where time-division multiplexing techniques are employed to preassign users to time slots.
因為它是一種異步的機制,ATM與同步傳輸模式理論(比如時分複用技術,它為每個用戶預定義了時間片)并不相同。
That's where asynchronous transfer mode with its ability to support voice, data and video on a single platform comes in.
由于具備在一個平台上支持聲音、數據和視頻的功能,異步轉換模式由此應運而生。
Digital TV transmission is realized with asynchronous transfer mode(ATM)based on quick grouping exchange.
數字電視傳輸利用基于快速分組交換的異步傳輸(轉移)模式(ATM)技術實現。
Interface circuit and the design of control program in asynchronous transfer mode between AT89C51 single chip microcomputer system and intelligent MODEM are introduced.
介紹AT89C51單片機系統與智能調制解調器MODEM之間的接口電路和異步傳輸方式下的控制程式設計。
The most often used switching technology for the broadband information highway is asynchronous transfer mode, or ATM switching.
寬帶信息高速公路上最常用的交換技術是異步傳輸模式,即ATM交換。
SS7 is used in mobile, wireless networks and asynchronous transfer mode (ATM) networks.
SS7用于移動無線網絡和異步傳輸模式(ATM)網絡。
The introduction of the asynchronous transfer mode(ATM) concept has significantly influenced the coding of video services.
異步轉換模式(ATM)的提出對編碼技術産生了重大的影響。
It is known that the flexibility and capacity of asynchronous transfer mode (ATM)networks can meet the bandwidth requirements of multimedia applications.
衆所周知,異步傳輸模式(ATM)網絡的帶寬可以滿足多媒體應用的需求。
Wireless Asynchronous Transfer Mode(ATM)network communication system will be applied widely in broad band and multimedia personal communication.
無線異步傳輸模式(ATM)網絡通信系統将在寬帶和多媒體個人通信得到廣泛應用。
Voice over ATM is that by using the asynchronous transfer mode packaging the voice into packets to realize in transferring in ATM networks.
話音ATM交換就是利用ATM傳輸方式,将傳統話音通過分組打包實現在ATM網絡平台上的傳輸。
An edge router is a router that interfaces with an asynchronous transfer mode (ATM) network.
邊緣路由器是與異步傳輸(ATM)網絡相連接的路由器。
On-board processing (OBP) is one of significant satellite communication technologies. The Asynchronous Transfer Mode (ATM) is widely used in the OBP.
星上處理是衛星通信重要的技術之一,異步傳輸模式(ATM)是一種重要的星上交換處理模式。
CDV is the main cause leading to cell loss in asynchronous transfer mode (ATM) networks.
信元時延偏差(CDV)是ATM網内引起信元丢失的主要原因之一。
ABR is a new service in ATM(Asynchronous Transfer Mode)network, it adopts rate-based congestion control mechanism and is mainly used for data transmission.
ABR業務是ATM中新定義的一種業務類型,它主要面向數據傳輸服務,采用基于速率的端到端的擁塞控制機制。
Asynchronous Transfer Mode(ATM) has emerged as the most promising technology in supporting the future broadband multimedia communication services.
異步傳輸模式(ATM)将成為支持未來寬帶多媒體通信的網絡技術。
Along with the development of asynchronous transfer mode (ATM) broadband network technology, new demands have been made on image coding methods.
采用ATM的寬帶通信網絡的發展,對圖象編碼提出了新的要求。
The asynchronous transfer mode (ATM) forum has chosen rate based control as the flow control scheme for available bit rate(ABR) service.
ATM論壇将基于速率的流量控制選定為ABR業務的流量控制方法。
This paper deals with the data collection and processing system as the main part of the management system for multi-service asynchronous transfer mode(ATM) network.
研究了多業務ATM網絡管理系統的主要組成部分——網絡數據采集和處理系統。
The technology of Asynchronous Transfer Mode(ATM) is used in Wide Area Network(WAN) and Local Area Network(LAN) as a basic technology for the application of broad band.
異步傳輸模式(ATM)技術作為寬帶應用的基本技術用在局域網和廣域網中。
This paper describes a learning method which uses neural networks for service quality control in the asynchronous transfer mode (ATM) communications network.
介紹神經網絡解決ATM通信網中業務質量控制的一種學習方法。
In the asynchronous transfer mode, one can only send and receive one from the Festival and is frequently used method of microcomputers.
在異步傳送方式下,一次隻能發送和接收一個自節,是微型機經常使用的方法。
異步傳輸模式(Asynchronous Transfer Mode, ATM)是一種面向連接的、基于信元(cell)交換的高速網絡傳輸技術。其核心特點和工作原理如下:
信元交換基礎: ATM 将數據分割成固定長度的小數據包,稱為信元(Cell)。每個信元長度為53 字節,其中包含5 字節的頭部(Header)和48 字節的載荷(Payload)。這種固定長度設計便于硬件高速處理和交換,減少了處理可變長度數據包帶來的延遲和抖動,特别適合傳輸實時性要求高的語音、視頻等多媒體數據。
面向連接與虛電路: 在數據傳輸開始前,ATM 需要在源和目的設備之間建立一條虛連接(Virtual Connection)。虛連接分為兩個層次:
異步時分複用: “異步”一詞源于其複用方式。與同步傳輸模式(如 T1/E1)為每個連接分配固定時隙不同,ATM 采用異步時分複用(Asynchronous Time Division Multiplexing, ATDM)。信元隻在有數據需要發送時才占用信道帶寬,來自不同連接的信元可以動态地、非周期性地插入到傳輸流中。這使得帶寬利用率更高,能靈活適應突發性數據流。
服務質量保證: ATM 的核心優勢之一是能夠提供不同級别的服務質量(Quality of Service, QoS)。在建立虛連接時,終端設備可以協商所需的帶寬、延遲、延遲抖動(Jitter)和信元丢失率等參數。網絡設備(ATM 交換機)根據這些參數進行流量管理(如流量整形、流量管制)和擁塞控制,确保關鍵應用(如實時視頻會議)獲得所需的網絡資源保障。
主要應用場景: ATM 技術最初設計用于寬帶綜合業務數字網(B-ISDN),旨在統一承載語音、數據、視頻等綜合業務。它曾是廣域網(WAN)骨幹網、局域網(LAN)主幹以及早期 DSL(如 ADSL)接入網絡(在用戶端 DSL Modem 和局端 DSLAM 之間)的關鍵技術。雖然隨着 IP 技術和以太網的快速發展,ATM 在新部署中已較少使用,但其 QoS 理念和信元交換思想對現代網絡技術仍有深遠影響。
權威參考來源:
Asynchronous Transfer Mode(ATM)是一種高速數字通信技術,主要用于高效傳輸多種類型的數據(如語音、視頻、圖像等)。以下是其核心要點:
ATM全稱異步傳輸模式(),由國際電信聯盟(ITU)定義,采用固定長度的數據單元(稱為“信元”,每個53字節)進行傳輸。其名稱中的“異步”指信元的傳輸間隔不固定,可根據需求動态分配帶寬。
ATM屬于異步模式,而同步傳輸(如SDH)需固定時隙分配。ATM靈活性更高,但同步傳輸在時鐘同步要求嚴格的場景(如傳統電話網絡)中更具優勢。
ATM協議棧包含適配層(AAL),負責将不同數據格式適配為統一信元,例如AAL1用于語音,AAL5用于數據包。
若需更詳細的技術規範或曆史發展,可參考網絡與通信領域的專業資料。
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