Haberleşme yönetim ağı ve ENE tasarımı
Telecommunication management network and design of end network element
- Tez No: 19264
- Danışmanlar: DOÇ.DR. BÜLENT ÖRENCİK
- Tez Türü: Yüksek Lisans
- Konular: Elektrik ve Elektronik Mühendisliği, Electrical and Electronics Engineering
- Anahtar Kelimeler: Son ağ elemanı, Tasarım, İletişim ağları, End network element, Design, Communication networks
- Yıl: 1991
- Dil: Türkçe
- Üniversite: İstanbul Teknik Üniversitesi
- Enstitü: Fen Bilimleri Enstitüsü
- Ana Bilim Dalı: Belirtilmemiş.
- Bilim Dalı: Belirtilmemiş.
- Sayfa Sayısı: Belirtilmemiş.
Özet
Serveability performance is especially important for the switching network. It can be modelled via the quality of service parameters - <QOS parameters) such as connection set up loss,, connection set up delay etc. Transmission performance include such impairments as bit error ratios, jitter, slip, propagation delay, loudness loss, echo etc. Performance management can be shortly defined as determinig the limits of the above items, changing them, observing whether the telecommunication system works within the specified limits, the evaluation of the observation results and transmitting them. Fault Managements The maintenance concept can be divided inlo three parts as follows -Preventive maintenance -Corrective maintenance -Controlled maintenance Preventive maintenance is the execution of certain test operations periodically, to decrease the probablity of a fault before it happens. Corrective maintenance is carried out after fault recognition and is intended to restore a faulty item to a state in which it can perform a required funtion. Controlled maintenance is a method that sustains a desired quality of service by the systematic application of analysis tecniques using centralised supervisory facilities and/or sampling to minimise preventive maintenance and to reduce corrective maintenance. Maintenance costs take an important part of the service total costs. The most efficient maintenance should aim to.reduce this cost to a minimum level. TMN offers a controlled maintenance which is the nearest to this target. Especially, the time spend from the occurance of a fault to the arrival of the maintanence pesonnel to the place of event, which is defined as the logistic delay is reduced to minimum. Configuration Managements As a result of performance and fault managements, some changes may be necassary in the configuration of telecommunication network. These changes may be either in the equipment bases or in the data bases, or both of them. The change of configuration in the equipment bases can be defined as protection facility. In this case, configuration management is to transmit or evaluate information of protection mechanism. In addition, when a new system enters the network or XII
Özet (Çeviri)
ÖZET Bu tez kapsamında, günümüz haberleşme teknolojisinde oldukça önem kazanmış HABERLEŞME YÖNETÎM ASI (TMN) incelenmiş ve iletim sistemleri için bu ağın ilk seviyesi olan SON AS ELEMANI (ENE) tasarımına ilişkin çalışmalar yapılmıştır» Yapılan çalışma dört ana bölümden oluşmuştur. BÖLÜM 1 deş Haberleşme Yönetim Ağının <TMN) genel tanıtımı yapılmıştır. Bu kapsamda ag elemanı (NE) kavramı incelenmiş, TMN-Haberlesme Agı ilişkilerine açıklık getir i 1 mistir. BÖLÜM 2 deş gerçekleştirilen sistemin (ENE) genel yapısı üzerinde durulmuş» tasarımı yapılan iki katmanın (veri bağı ve -Fiziksel katman) özellikleri tanıtılmıştır. BÖLÜM 3 deş ENE sistemi donanım yapısı, donanım çizimler ide verilerek tanıtılmıştır. BÖLÜM 4 deş ENE sistemi yazılım yapısına ayrı lmıstır. Bu bölümde -fiziksel katman yazılımları, veri bağı katmanı yazılımları ve bellek yönetimi yazılımları tanıtılmış, akis diyagramları verilmiştir.ÖZET Bu tez kapsamında, günümüz haberleşme teknolojisinde oldukça önem kazanmış HABERLEŞME YÖNETÎM ASI (TMN) incelenmiş ve iletim sistemleri için bu ağın ilk seviyesi olan SON AS ELEMANI (ENE) tasarımına ilişkin çalışmalar yapılmıştır» Yapılan çalışma dört ana bölümden oluşmuştur. BÖLÜM 1 deş Haberleşme Yönetim Ağının <TMN) genel tanıtımı yapılmıştır. Bu kapsamda ag elemanı (NE) kavramı incelenmiş, TMN-Haberlesme Agı ilişkilerine açıklık getir i 1 mistir. BÖLÜM 2 deş gerçekleştirilen sistemin (ENE) genel yapısı üzerinde durulmuş» tasarımı yapılan iki katmanın (veri bağı ve -Fiziksel katman) özellikleri tanıtılmıştır. BÖLÜM 3 deş ENE sistemi donanım yapısı, donanım çizimler ide verilerek tanıtılmıştır. BÖLÜM 4 deş ENE sistemi yazılım yapısına ayrı lmıstır. Bu bölümde -fiziksel katman yazılımları, veri bağı katmanı yazılımları ve bellek yönetimi yazılımları tanıtılmış, akis diyagramları verilmiştir.taken out of the network, this event must be actioned with a minimum number of operators and hours. Because protection mechanisms executed in a dynamic sturucre with a TMN, it provides an important gain in the increase in performance. The aim of data configuration is the data base management. In this context,, data base management can be listed as followss Carrying of calender and watch information, creating new data bases, carrying the existing ones and reading them. Documantation Managements Since the statistic obtained from information gathered from TMN indicates high error speed systems and its manufacturer, change condition of systems with various parameters, faulty place-logistic delay, fault- maintenance time relationships, changes in the telecommunication network in the future, renovation, using in the planning operations such as human source and machinery park usage are most important application functions that are expected from TMN. Better administrator performance and more stable and logical estimation about feature of administrator are possible with the help of this function. Moreover, intime, providing documants like invoices, call lists information about the related service to the subscriber can also be realized in TMN. Security Managements Security can be defined as the protection of information and making constraints on the ways to reach this information. The information should be given to the rigt person, at the rigt place, with the rigt managed system, at the rigt time. To do all of these, the security management has the operation of mechanism such as the coding of the personnel, giving privileges to use, the coding of systems, assigning them security degrees, changing these and so on. TMN Establishment Fuctionss The function block, Where the application functions indicated above are applied are called establishment function. These are, physically, the architecturalconstructions whice constitude the TMN. ENE, end network element, is the first level of the TMN managed system relationship frame. It can be introduced as the establishment block where tehe application functions are defined too. ENE operative functions are gethering information from managed systems, manipulating and transmitting them to upper levels, take and evaluate the information from upper levels and to carry them out, provide access to the operator. XIIIMD, mediation device, which is a block that is used when connecting ENE directly to the operation system (OS) is not economical» The tasks of this establishment block are statistical multiplexing,, routing, protocol conversion address and information conversion, accessing to OS etc» OS, operation system, is the establishment block where all kinds of application functions are started from the top level, observed and directed. These establishment blocks connections are achieved by LCN (local communication network) and DON (data communication network) Design of ENEs This system consists of three blocks» M~ interface block, QX-interface block and dual port RAM block» M-interface block provides the relationship between transmission systems (managed systems) and QX-interface block» By means of this block, transmission systems are periodically checked and necassary information is gathered» After processing the gathered information, results obtained are stored in the system RAM block» In case of any fault, related interfaces such as visual (lamps), audio (buzzer), are excited. Relationship between M-interface block and ME (maintenance entity) is realized via M-interface. This type of interface is not the scope of CCITT recommendations so it can be freely specified» In this study, UART mode transmission and asynchronous communication modes are selected as M-interface» Additionally, M-interface block has man-machine interface that is executes presentation functions» Via display and keyboard, operation personnel can access the system to have information about ME or enter setting information of MEs. In this context, related information during maintenance can be printed out via RS232C» Received information from OX block is located in the related RAM block" to pass to the owner ME. M-interface block has five units to perform its functions. These are as follows» -M-interface central unit -M-interface memory unit -M-interface display unit -M-interface power supervision unit -M-interface RS232C unit Software sturucture of M-interface block isn't scope of this thesis. OX-interface block is the heart of an ENE system from the point of system's TMN compatibility. In this block, received information from TMN upper level is delivered to the M-interface block. XIVThis information will be transferee! MEs at the end of process. In the opposite direction, namely from ME to TMN upper levels, information flow is also achieved by QX- interf ace block» In this thesis, the QX-interface realised supports recommendations of ETSI. Draft pr ETS 300 150s 1991 protocol suite Al is selected» This recommendation is also defined by CCITT in recommendation G.77İ. According to suite Al, there are three levels» Physical, data link an network leyer. But network layer aren't studied in detail in this study» OX-interface consists of only one unit named QX- interface unit. QX-software sturucture is based on OSI architecture Every layer has its own software independent ly« Relationship between layers is supplied by layer primitives» There are three main blocks in software except NET-SW (network layer software). These are as follows? -LLC-SW (logical link control software) -MAC-SW (medium access control software) -BUFFER-SW (buffer management software) MAC-SW uniquely executes pyhsical layer requirements. Any data link layer protocol software can use it. LLC-SW s responsibility is to achieve data link layer- protocol» BUFFER-SW is designed for memory management. Al 1 layers use same memory block via a different descriptor. M-interf ace block and OX-interface block communicates with each other via a dual port RAM. Dual port RAM block is located in the M~interface memory unit. XV
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