空中介面 的英文怎麼說
中文拼音 [kōngzhōngjièmiàn]
空中介面
英文
air interface-
Radio link protocol. a protocol used over the air interface
無線電連接協議，空中介面協議。The medium access control ( mac ) layer protocol of the airlink interface between the mobile data base station ( mdbs ) and mobile end systems ( m - ess ) in cellular digital packet data ( cdpd ) is studied firstly. the access method of slotted non - persistent digital sense multiple access with collision detection ( dsma / cd ) is described mainly
本文首先研究了蜂窩數字分組數據（ cdpd ）空中介面中的介質接入控制層（ mac ）協議，詳細論述了基於時隙的非堅持的、帶沖突檢測的數字載波偵聽多址接入協議（ dsma cd ） 。First of all, the development of the digital trunked communication system is summarized, and the technical characteristics of several prevail worldly digital trunked communication systems are compared. in view of the domestic situation, the tetra digital trunked radio communication system is chosen as the studying and developing model. with the study of control technology of softswitch, the protocol of the v + d air interface and the multiple use of channel is analyzed, the base station control unit of the digital trunked communication system is discussed, the calling control flow is designed
本文首先綜述了數字集群移動通信系統的發展狀況，針對目前國際上流行的數字集群體制的技術特點進行了比較和分析，並根據我國的具體國情選擇了tetra數字集群系統作為研究和開發的重點，結合對軟交換控制技術的研究和分析，對集群系統重要的v + d空中介面協議及其通道復用進行了較為深入的剖析，對數字集群實驗系統的基站控制部分進行了論述，對呼叫控制流程進行了設計。Coinpe with talihonal analog tnulking system, tetra system is apter to boplemen digltal encrypon of speech and data, but system securiiy is unable to depertd sdriply on enctwon. from the point of view of the b1lbrmation system security arehithebe, the author classified and concltuled the tetra system seeurity and wuced sytw security bo the wts of thnd analysis, security requirements, security sehaces and security mangemen etc. 111e mechbosm of authentication, tem1ina enable and disabq air intn encrypion, end - bend encmption led in tewh is the key ler in this n to the security question of practical application, the re1evant wt w and m are provided too
但是系統安全不能單純依靠加密來保證，作者從信息系統安全體系的角度，對tetra系統安全進行了分類歸納，從風險分析、安全需求、安全服務、安全管理等方面對tetra系統安全體系進行了閘述，並對tetra系統中主要應用的鑒權、終端激活禁用、空中介面加密、端到端加密等安個機制進行了重點研究，同時針對實際應用中出現的安全性問題提出了解決方法。W is a digiul trunkin mobile cominunhaon system based on mma forhnology it offers group call diw w m wion ( dmo ), duplex phone tall, padri data sehece, short data service and so on. tetw supports air interface and end - bend encrypon. tem is not only a fit private system for dispateh cominedcation of the polieq fire servce " w ha wtport, city tiwhc eto, but also for ule project reqthements of the public tw communication system
Tetra是一種基於時分復用（ tdma ）技術的數字集群移動通信系統，它可以提供組呼調度、脫網直通（ dmo ） 、企雙工電話、分組數據服務、數據簡訊息服務等業務，支持空中介面加密和端到端加密功能，既適合公安、消防、機場、鐵路、城市交通管理等專業部門調度指揮專用，也可滿足社會共用集群網的設計要求。Secondly, some encryption algorithms are introduced, with the analysis and comparison for these encryption algorithms, the author designs an appropriate project to accomplish the end - to - end encryption. thirdly, this paper accomplish the design of an encryption scheme which combining the strongpoint of the rsa algorithm and the idea algorithm. the main process is as following : first, input the digital signal to the encryption device, and then the digital signal exclusive or with the keying sequence which is generated by key stream generator ( ksg ) and the ksg is based on the idea encrypting and deciphering algorithm, the secret key synchronization is also studied
本課題主要研究的內容是數字集群通信系統加密機制的研究，首先介紹了數字集群通信系統的安全保密機制，講述了單向和雙向鑒權的過程、單呼和群呼的空中介面加密過程及其密鑰的選用和管理，特別介紹了端到端加密;然後介紹了幾種常用的加密演算法，通過分析其優劣，提出了端到端加密的解決方案;最後完成了基於rsa演算法和idea演算法的數字集群通信系統加密方案的設計，其具體過程為將經過數字信號送入加密器里，和以idea加密演算法為基礎設計的密碼流發生器（ ksg ）產生的密碼序列進行加解密運算，並且研究了此加密過程的密碼同步問題。Protocal of air intereace for paging system
尋呼系統空中介面協議epoc尋呼碼Project 25 - common air interface reserved values
項目25 .通用空中介面保留值Project 25 - common air interface reserved values - addendum 1
項目25 .公共空中介面預定值.補充件1I - cdma spread spectrum systems air interface standard - stage 3 text
I - cdma擴展光譜系統空中介面標準.階段3文本Test and computation of performance of cdma2000 1x - ev - do airinterface radio link
系統空中介面無線鏈路性能分析計算Broadcast teleservice transport - broadcast air - interface transport service
廣播用戶終端業務傳輸.廣播空中介面傳輸業務Radiofrequency identification of animals - advanced transponders - part 1 : air interface
動物的射頻標識.高級應答器.第1部分:空中介面Dual mode mobile phones have more than one air interface and hence can work on more than one network
雙模式手機有多個空中介面，因此可以在多個網路下工作。Air interface technical specifications of the 800mhz cdma digital cellular mobile telecommunication network
800mhz cdma數字蜂窩移動通信網介面技術要求:空中介面The software communicates with the dispatch server via a set of interface functions. the sequence charts of the commanding and dispatching services, such as call control, monitoring, short messages are given referring to tetra air interface protocol
調度臺軟體通過一組介面函數與調度服務器進行信息交互，參考tetra空中介面協議，本文給出呼叫控制、監聽、短消息等指揮調度業務的消息順序圖。Based on 3gpp standard, the author analyzed and researched the higher protocol layers of radio interface in wcdma, including radio resource control layer ( rrc ), medium access control layer ( mac ) and radio link control layer ( rlc ), in which, the rlc is emphasis
依據3gpp協議，作者對wcdma空中介面的高層協議部分進行了分析和研究，包括無線資源控制層（ rrc層） 、媒體接入控制層（ mac層）和無線鏈路控制層（ rlc層） ，其中，對rlc層進行了重點研究。In the physical parts of the air interface, a communication between bs and ms has to be equipped with bs antenna to do
在空中介面的物理層部分，移動站和基站間的通信必須有基站天線的配合才能完成。As a way of accessing to the backbone network, the network architecture of gsm includes both aerial interface of radio path ( called um ) and many circuits on the land
Gsm作為一種接入網，其網路結構不僅包括無線空中介面部分，而且還有相當多的地面電路。The network ( air ) interface between a mobile end system ( m - es ) and the cellular digital packet data ( cdpd ) - based wireless packet data service provider network
移動終端系統（ m - es ）和基於蜂窩數字分組數據（ cdpd ）之間的網路（空中）介面，基於無線分組數據業務提供商網路。分享友人