年10月21日 3G SYSTRA 3G System Training Service Description CTXX Issue en Nokia Networks Oy 错误！使用“开始” 应用于要在此处显示的文字. 3G SYSTRA. Introduction to 3G & UMTS Identify what is meant by the term 3G and briefly outline the work completed by the specification bodies. Furthermore. Directory: 3G/4G develop. Plat: PDF Size: KB Downloads: 4. Upload time: Uploader: joyraj. Description: This book on 3G system.
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The ability to transport service dependent messages across switching exchanges. It is not the intention of this section to give a complete explanation of all the units in this section, but only a simple overview of them to give an understanding.
The simultaneous use of separate uplink and downlink frequencies enables communication in both the transmit TX and the receive RX directions.
Fault management provides the network operator with information about the current status of alarm events and maintains a history database of alarms. These time slots are allocated for speech only when a user has set up the call. When the registration is completed, the professor goes to his room.
The HLR sends the result back, which 3h be the final result or some other messages might also follow or it might not be the last result. The MSRN does not merely identify the subscriber, it also points to the exchange itself so that all intermediate exchanges, if there are any, know where the call is syztra be routed.
There are extra signalling requirements in GSM due to the different architecture of the network that requires a large amount of non-call-related signalling. Erlang is the measuring unit of network traffic. If the time slots of the TDMA frame represent the physical channels, what about the contents? The functions of signalling are as follows: This also enables switching for half rate speech.
After listening to your answer, she would try to connect you to the person you wanted to talk with. In addition, there is the question of whether sufficient resources are available to support the service from end to end. None of the above. A point to point connection must be set up.
Speech encryption is carried out between the BTS and the mobile station. A subscriber in a fixed network dials the number 33g a mobile station. When used in omnidirectional mode, up to six TRXs can be used. This is because user traffic does not come to the Sstra. SRES is used for speech encryption and Kc is used for frame alignment. The figure below illustrates the TDMA principle. Your task is to distribute the frequencies in the network that is shown in the following figure with one frequency per cell.
The visitor register of the hotel and the permanent register of the embassy also have their counterparts within the GSM network. This development set some requirements concerning the GSM system specifications and these requirements are built into the specifications as follows: If the subscriber is moving within a single location area, there is no need to send a location update request.
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3G-Systra This book on 3G system .practical book. –
Furthermore, we can perform field-testing in order to identify the performance from the user’s point of view. In channel coding, the user data is coded using standard algorithms. Information is sent in packets along whichever route is available at the time. Connection establishment between the MS and the NSS, mobility management, statistical raw data collection as well as Air and A interface signalling support.
During the data transfer, each packet associated with a connection is passed over the same route through the network. There are four types of handovers: The digital values 0 and 1 are used to change one of the characteristics of an analogue radio signal in a predetermined way. To avoid this, the GSM network includes a specification of the Frequency 3b patterns.
Additional information can be obtained with the help of subscribers’ feedback. The student should be capable of following a model and explaining what is happening to data at every phase in the Uu interface for the UMTS-FDD implementation List and clearly explain the key functions and tasks in Radio Resource Management.
3G SYSTRA – Overview to UMTS Network Planning & Radio Resource Management
A teleservice or a bearer service is also a basic service that has an enhanced performance by the use of a number of supplementary services. This technique is called modulation. Here we see the actual implementation of it. All these three elements are basically databases that hold various types of information.
00_Table of Contents 3G SYSTRA(Jan-06)
In a mobile terminated call a traffic channel from the NSS in the terminating side to the called mobile station is reserved when: The DCN is normally implemented using syxtra X. At an overview level, explain what UMTS radio resource management is, and describe its effect on network planning.
Charging records can be generated sstra Therefore, when the set time is up, the mobile station initiates a registration process by sending a location update request signal. In this chapter we will see how Nokia has implemented the full GSM network with its various network elements.
In this example, the embassy maintains a database, which contains the basic data of all the citizens who are travelling around the world and a record of their movements. They are still doing exactly the same job as the lady, but faster and more reliably over a global network. However, the amount of signalling between the MSC and the VLR is quite heavy and their tasks are so related with each other that it makes good sense to integrate them together.