Essays about: "gsm voice"

Showing result 1 - 5 of 22 essays containing the words gsm voice.

  1. 1. Parametric Prediction Model for Perceived Voice Quality in Secure VoIP

    University essay from Linköpings universitet/Informationskodning

    Author : Martin Andersson; [2016]
    Keywords : VoIP; QoS; Parametric model; Encryption;

    Abstract : More and more sensitive information is communicated digitally and with thatcomes the demand for security and privacy on the services being used. An accurateQoS metric for these services are of interest both for the customer and theservice provider. READ MORE

  3. 2. Software Defined Radio based MIMO channel sounding

    University essay from Lunds universitet/Institutionen för elektro- och informationsteknik

    Author : Jens Elofsson; Peter Seimar; [2016]
    Keywords : channel sounding; MIMO; Zadoff Chu; M-sequences; USRP; FPGA; Technology and Engineering;

    Abstract : With todays increased use of smartphones and other wireless devices, the demands on the wireless networks have increased dramatically. This has prompted the re- search and development of new types of wireless systems using multiple antennas at both the transmitter and the receiver, known as MIMO. READ MORE

  4. 3. Addressing non-conformities in a ERTMS implementation : Collecting non-conformities in ERTMS simulation and analyzing their management via a database

    University essay from KTH/Radio Systems Laboratory (RS Lab)

    Author : Laurier Ndikuriyo; [2015]
    Keywords : ERTMS; GSM; ETCS; Simulation; Non-conformity; Management; database; ERTMS; GSM; ETCS; simulering; icke-avvikelse; management; databas;

    Abstract : The European Rail Traffic Management System (ERTMS) aims to standardize train control command and communication systems in Europe. The main goal of its introduction is to develop trans-European railway traffic and increase competition. READ MORE

  5. 4. GSM HLR Unstructured Supplementary Service Data (USSD) service

    University essay from Institutionen för informationsteknologi

    Author : Mohammedreza Taghilu; [2013]
    Keywords : ;

    Abstract : The Unstructured Supplementary Service Data (USSD) provides a service additional to GSM main service (teleservices and bearer services). Similar to its counterparts, Mobile Station (MS) user and entities of GSM network operator  act as main roles in order to establish communication in which the message traffic is transparent for the mentioned actors. READ MORE

  6. 5. GSM Voice Mail Service TDM Call Control

    University essay from Institutionen för informationsteknologi

    Author : Ebby Wiselyn Jeyapaul; [2012]
    Keywords : ;

    Abstract : The Voice Mail Service (VMS) enables forwarding of calls to a dedicated Voice Mail Server (VMS) on behalf of the call receiving subscriber during certain conditions such as 'busy subscriber', 'no answer', 'always', etc. The standardization forum 3GPP has specified the Global System for Mobile communication (GSM) while the standardization forum ITU-T has specified the Integrated Services Digital Networks  (ISDN) User Part (ISUP) call control protocol. READ MORE