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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Another problem with CAS is that it is not possible to send signalling messages in the absence of a call. For each layer in the signalling stack the student is expected to give short explanation of its function.

In addition to the commercial demands above, some other main objectives were defined: In the first instance the subscriber is mobile, unlike the PSTN telephone, which is always in one place. Within the mobile network, there are subscribers who move around and register into the service areas of networks in order to use the services provided by them. In association with the fax service the subscriber may request a supplementary service of Call Forwarding On Mobile Subscriber Not Reachable, so that his data calls will be forwarded to another destination.

3f are fixed databases that maintain basic information about their customers, including data on their current location, and temporary databases storing information about the users who are currently located systr their service area. Message bearers taking the message to their managers The initial phase of SS7 consisted of two parts: Since each carrier supports eight channels, we can make a rough estimation that this sywtra must be equipped with three carriers, that is, three transceivers or TRXs.

Topics to be covered in this module include the differentiation between UMTS services and applications, a general discussion of the Virtual Home Environment, and sywtra introduction of the most important service platforms. Match the year in the left-hand column with the corresponding significant GSM event in 3h middle column.

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 to be routed.

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All the various tasks of the exchange are distributed to different functional units, which have a CPU of their own. By multiplying 51 with 26, we can conclude that any TDMA frame number will occur simultaneously in both multiframes every TDMA systfa which corresponds to 6.

Ciphering is also carried out for security reasons. Whether the GSM network from where the user is getting the service has the necessary resources or not? Generally, based on the nature of the transmitted information, services can be grouped as systa services, where the transmitted data is speech, and data services that covers the rest of the information types such as text, facsimile, etc.

All the logical channels except traffic channels are mapped into timeslot 0 or sysra 1 of the broadcasting TRX.

SYSTRA Training Document | Muhammad Suleman Khan –

There is a uniform set of standard messages in the signalling repertoire. The radio carrier signal between the mobile station and the BTS is divided into a continuous stream of timeslots, which in systfa are transmitted in a continuous stream of TDMA frames – like a long line of vehicles with eight seats in each. Shadowing effect Shadowing is generally a problem in the uplink direction, because a Base Transceiver Station transmits information at a much higher power compared to that from the mobile station.

The student should also understand how the UMTS functions and identify how the radio resources are managed. Transcoder In the case of the Air Interface, the media carrying the traffic is a radio frequency, but, as we saw in the example of a PSTN originated call, the traffic signal is also carried through fixed networks. Connection establishment between the MS and the NSS, mobility management, statistical raw data collection as well as Air and A interface signalling support.

As we mentioned previously, there are a total of twelve logical channels.

The mobile phone constantly receives information sent by the network. In the example of the army, the soldiers are one type of logical channel and the officers are other types of logical channels, and they exercise some kind of control depending on their responsibilities.


Each one of these functions requires a separate “logical channel”, as the data contents are different. From the call establishment point of view, the MS must have a connection through these two interfaces before a call can be established.

As all the hotels in the world give this type of service, we can call it a basic service. Somebody calls him and the receptionist answers.

3G SYSTRA – Overview to UMTS Network Planning & Radio Resource Management

The hotel is an establishment that provides services. TMSI is reallocated after every successful authentication verification. Services Basic Supplementary services services Bearer Teleservices services However, if a person registers as a GSM subscriber and buys a mobile 3gg, he takes it for granted that at least the speech service is guaranteed after all, that is the reason why he bought the phone in the first place.

The MB Message Bus is the parallel, duplicated message bus for sending and receiving DX messages between different functional units.

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

If the PIN entered by the subscriber is correct, the phone is unlocked and ready for use. Which of the following are factors in network planning? By this method, one frequency resource can be shared by a maximum of eight mobile users.

By December there were 13 networks operating in 7 areas. It identifies the called subscriber on the basis of the MSISDN and then checks its database to determine the subscriber’s location. Systr who is the user who receives, sends and acts on these messages?

The ability to perform non call related signalling procedures. In addition to a standard fee, subscribers have to pay for the calls they make and the services they use.

It has its own platform.

The purpose of the NMS is to monitor various functions and elements of the network. Paging a subscriber for mobile terminated calls.