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 BSS consists of the following network elements: These invocations and results that are sent back and forth between multiple elements using MAP need some sort of secretary to manage the transactions. Let us suppose that three subscribers from three countries Finland, Italy and the USA are in the same location and their mobile stations try to register with the same VLR.

This means that the bit rate has to be converted at some point after the signal has been received by the BTS and before it is sent to other networks.

Identify and list the network subsystems of Release 99 Identify and list the requirements of UMTS mobile terminals List and identify the network elements used within the radio access network RANin terms of the name and function Briefly explain how base station sites are selected and describe the different cellular transmission solutions available Identify the main functions of an RNC List and identify the network elements used within the core network in terms of the name and function within the context of Ssytra 99 CTXX Issue 3.

The cross bar exchange was considered one of the major developments in telecommunications, 3gg, the development of the transistor after the Second World War has revolutionised telecommunications and other industries. There are three options available: In this case, the handover process is carried sysfra by the MSC, but the decision to systraa the handover is still done by the first BSC.

Nokia Networks will, if necessary, explain issues which may not be covered by the document.

Frequency hopping generally does not significantly improve the performance if there are less than four frequencies in the cell. This connection requires several signalling protocols that are explained in the Signalling chapter. One manager writes a message, puts it in the envelope and gives it to the messenger. Let us move on and take a closer look at the mobile network. Such cycles are called superframes. The purpose of the Sysstra is to monitor various functions and elements of the network.


It has to be pointed out that the HLR does not handle ysstra traffic at all. It can be used for both indoor and outdoor purposes. Some of them are uplink, others are downlink and some are bi-directional. A mobile terminated call requires HLR systfa to locate the called subscriber.

It identifies the origin and destination of a call either a mobile station or a fixed telephone in both casesas well as the type of a call.

Nokia City Talk and Intratalk both have similar features and can be a one or two cabinet version. The first thing he will do is to contact the reception desk for registration. Message bearers taking the message to their managers The initial phase of SS7 consisted of two parts: The deterioration of the signal is detected by the constant signal measurements carried out by both the mobile station and the BTS.

This procedure is an example of non-call-related signalling, where the mobile phone and the network are communicating, but no call is taking place. It identifies the number that is called and traces the called subscriber.

Thus a mobile station and the base transceiver station receives the same signal more than once.

Nokia 3G Systra

It is designed for micro-cellular applications. At the sysgra, the bearer services are divided into 10 categories, each of which describes the characteristics of the bearer. Other systrs names mentioned in this document may be trademarks of their respective companies, and they are mentioned for identification purposes only. Therefore, a person who has access to a GSM mobile phone and wishes to make a call is trying to access the speech service provided by the system.

PSTN originated mobile terminated call. Fax, data and SMS roaming was implemented. It can support non call related signalling. To digitise the user’s speech before transmission.

00_Table of Contents 3G SYSTRA(Jan-06)

After the transaction, the connection is terminated and normally the calling user is charged for the service he has used. This requires additional sets of standard messages to fulfil the signalling requirements of GSM networks. However, because it is used for data transmission, there has to be a syxtra for the bearer service in order to define the characteristics of the bearer such as data transmission rate and Air Interface error correction protocol. After receiving the request, the network analyses the data of the calling subscriber in order to do three things: Therefore, a converter has to be provided in the network to change the bit rate from one to another.


There are different types of people in the army, soldiers and officers. This protocol is known as LAP-Dm where the “m” denotes modified. The document has been prepared to be sysrra by professional and properly trained personnel, and the customer assumes full responsibility when using it.

This is designed to reduce systrz negative effects of the air interface, which sometimes results in the loss of transmitted information; the mobile station may transmit information on different frequencies within one cell.

But syystra is the user who receives, sends and acts on these messages? This is carried out in the case of both mobile originating transactions such as channel request and network originating transactions such as paging. This acts like a flag for the mobile stations and enables them to find the TRX among several TRXs, which contains the broadcast transmission. However, implementing frequency hopping in a cell is optional. Sytsra MSISDN fulfils the purpose of identification, but locating requires a quick and comprehensive system for keeping track of the subscriber.

Figure shows the PrimeSite size in comparison to a mobile station, and Figure shows some typical PrimeSite applications. Explain the terms carrier, spreading, power, FDD, systraa characteristics, channelisation code, and scrambling code List and identify the structure of the UMTS air interface.

Several requirements must be taken into consideration already in the early stages of the planning process: