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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To cover the costs of these operations, network operators often charge the subscriber an initial subscription charge. Servers are also provided and consist of a communications server, a database server and a standby server or combinations of these. The functions of signalling are as follows: The mobile scans all the radio frequencies and measures them. Secondly, we need to have some sort of information that enables the GMSC to route the call to the target MSC, wherever in the world it may be.

The actual size of a cell depends on several factors: Since the PSTN network is designed for voice communication with a bandwidth of 3.

CTXX Issue 3. Note that the network picture below contains equipment from a typical GSM network, some of which is not included in the GSM specifications. All bursts occupy this period of time, but the actual arrangement of bits in the burst depends on the burst type. The basic function of the MSC is the switching of telephone calls. Moreover, there is a need to create rules for routing, protection, synchronisation and switch management.

List sgstra least three significant events in the evolution syetra CDMA networks List the four main network subsystems of UMTS Release 99 Explain how existing GSM networks have evolved to support additional services and new technologies Name ysstra four basic air interface access technologies List at least three key benefits of WCDMA sysgra identify at least three advantages of 3G networks for both the operator and the end user without using any references.

Fax, data and SMS roaming was implemented. MTP layer 2 data link control helps in error free transmission of the signalling messages between adjacent elements. Moreover, the roaming number and the handover number have a similar purpose, that is, connecting two MSCs.


The HLR is no exception. Who pays for the call, which exchange takes care of the charging operation and where is the subscriber data stored. One has traffic peaks during weekdays and especially during working hours, and the other during the evenings and weekends.

The structure of the handover number is shown below: After he answers, the lady will connect you to him. The order in which the mobile station should change the frequencies is called the “frequency hopping sequence”.

The solution adopted to sysfra this problem is known as adaptive power control. Starting the location update procedure.

We can say that he is using a service provided by the hotel.

00_Table of Contents 3G SYSTRA(Jan) – [PDF Document]

When this order is important, there is need for establishing a “virtual connection”. The called party answers, and you are connected. 3h can give valuable information about the network, as their feedback reflects the experienced quality.

Careful network planning is thus a primary aspect ysstra implementing GSM networks. In such a case, the charge for the call will be shared according to the following principle: Transcoder In the case of the Air Interface, the media carrying the traffic zystra a radio frequency, but, as we saw in the example of a PSTN originated call, the traffic signal is also syztra through fixed networks.

Nokia Networks’ liability for any errors in the document is limited to the documentary correction of errors.

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.

The story of the professor visiting hotels bears a striking resemblance to the users and functions of a mobile GSM network.

Voice and signalling traffic matrixes must be defined, as well as the equipment to be used. One of the problems with these tools is that they can not fully reflect the quality the way the subscribers experience it.

3G-Systra This book on 3G system .practical book. –

The maximum theoretical distance from a BTS to the edge of the cell is 35 kilometres. The timing advance is adapted for these distances that is the ability of the mobile station to send the bursts in advance so that they arrive in the BTS in the right timeslot. The normal security procedures apply to all such calls, except in the case of emergency calls that are processed regardless of possible security violations up to the point that emergency calls can be made with a normal GSM mobile equipment that is not equipped with a SIM card.


An indication of disconnection and clearing of the call. It supported only call related signalling.

After obtaining this value, we must take a look at the Erlang table. These TRXs are then configured into one, two or three cells.

The following list covers most of the common services, as well as the essential supplementary services. In addition, the SIM card contains tools needed for authentication and ciphering and, depending on the type of the card, there is also storage space for messages, such as phone numbers etc.

The only thing we know is that he is in the hotel, because he has not checked out. Authentication procedure If the SRES value in the authentication triplet is the same as the SRES calculated and sent by the mobile station, the authentication procedure is successful. Both the mobile station and base transceiver station know these bits and by analysing how the radio propagation affects these training bits, the air interface is mathematically modelled as a filter.

The BSS consists of the following network elements: Call completion from the called side This is a simplified description of the process, but it conveys the idea that there are many functions involved in the air interface to enable a mobile user to have conversation.

In this case, the BSC controlling the cell makes the decision to perform handover.

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

Signalling units There are six different types of signalling units. If a handover occurs during a call: The connection systta the mobile station and the GSM network is fully digital. The BSIC is needed to identify that the frequency strength being measured by the mobile station is coming from a particular base station. Data transmission is supported in the whole GSM network.