What is the purpose of transcoder in GSM network?

Unsourced material may be challenged and removed. Transcoder and Rate Adaptation Unit, or TRAU, performs transcoding function for speech channels and RA (Rate Adaptation) for data channels in the GSM network. The Transcoder/Rate Adaptation Unit (TRAU) is the data rate conversion unit.

What is the function of TRAU in GSM architecture?

The main task of GSM TRAU is to compress and de-compress the speech data. For speech compression Regular pulse excitation long term prediction (RPE-LTP) encoding is used. It is able to compress speech from 64 Kbps to 16 Kbps, in the case of a full-rate channel (Here, net bit rate with fullrate is 13 Kbps).

What are the functions of BSS & NSS in distribution system?

The BSS has a standard interface so it can be connected to different types of switching centers. and the GPRS Core Network. The NSS part handles all switching and routing functions. The Mobile services Switching Center (MSC) is responsible for switching and routing.

What is the interface between BSC and MSC?

GSM Interfaces

Interface	Network location
A interface	Between the BSS and the MSC
Abis interface	An internal interface in the BSS (base station). Links between the BSC and BTS. Enables control of the radio frequency allocation in the BTS

What is the problem with multipath traversal of radio signal between a mobile and a BTS?

8) What is the problem with Multipath traversal of radio signal between a Mobile and a BTS? B) Arrived signal with two or more variants confuse receiver and cause noise.

What is the basic structure of GSM?

The GSM architecture consists of three major interconnected subsystems that interact with themselves and with users through certain network interface. The subsystems are Base Station Subsystem (BSS), Network Switching Subsystem (NSS) and Operational Support Subsystem (OSS).

What is GSM protocol?

The Global System for Mobile Communications (GSM) is a standard developed by the European Telecommunications Standards Institute (ETSI) to describe the protocols for second-generation (2G) digital cellular networks used by mobile devices such as mobile phones and tablets.

Is multipath fading good or bad?

Multipath signals are all time shifted with respect to one another, as they travel different paths. Although multipath is usually detrimental, it can be sometimes beneficial.

Where is the transcoding rate and Adaptation Unit?

TRAU, referred as Transcoding Rate and Adaptation Unit is located as shown in the figure below between BSC and MSC or between BTS and BSC. The main task of GSM TRAU is to compress and de-compress the speech data. For speech compression Regular pulse excitation long term prediction (RPE-LTP) encoding is used.

Where are the transceivers located in a cell?

The BTS houses the radio transceivers that define a cell and handles the radio link protocols with the MS. In a large urban area, a large number of BTSs may be deployed. The BTS corresponds to the transceivers and antennas used in each cell of the network. A BTS is usually placed in the center of a cell.

What is the global system for Mobile Communications ( GSM )?

INTRODUCTION:-The Global System for Mobile Communications (GSM) is a set of recommendations and specifications for a digital cellular telephone network (known as a Public Land Mobile Network, or PLMN).

What are the units in a GSM system?

In some GSM systems, the TRC contains units, which perform transcoding and rate adaptation. These hardware units are called Transcoder and Rate Adaptation Units (TRAUs). All TRAUs are pooled, meaning that any BSC connected to the TRC can request the use of one of the TRAUs for a particular call.

What is the purpose of transcoder in GSM network? Unsourced material may be challenged and removed. Transcoder and Rate Adaptation Unit, or TRAU, performs transcoding function for speech channels and RA (Rate Adaptation) for data channels in the GSM network. The Transcoder/Rate Adaptation Unit (TRAU) is the data rate conversion unit. What is the function…