GSM air interface over mobile satellite communication channel

  • 2.69 MB
  • English
StatementWai Ki Anita Tsang.
ContributionsUniversity of Surrey. Department of Electronic and Electrical Engineering.
ID Numbers
Open LibraryOL19593118M

GMR stands for GEO (Geostationary Earth Orbit) Mobile Radio interface, which is used for mobile satellite services (MSS) utilizing geostationary satellite(s). GMR is derived from the terrestrial digital cellular standard GSM and supports access to GSM core networks.

The Abis interface is the key air interface in the Access portion of the network. TheA interface is the primary interface within the Core portion of the network. These two interfaces have different characteristics and requirements which necessitate different solutions to optimize their performance over satellite.

GMR-1 3G is an extension of the published ETSI TS and TIA (S-J-STD) specifications for mobile satellite communications, GMR-1, to support IMT services. GMR-1 is currently used in mobile satellite systems covering Europe, Africa, Asia and Middle East.

GMR-1 3G is currently being deployed in North America. 2 References. Voice services are compressed for transmission over the air GSM air interface over mobile satellite communication channel book and converted to either PCM or ADPCM formats for transmission over the synchronous network.

Circuit switched data and fax information is transmitted over the GSM network in a digital form and converted to the appropriate modulation schemes for communication with existing systems.

GSM 4 GSM -Overview ♦ Formerly: Groupe Spéciale Mobile(founded ) ♦ Now: Global System for Mobile Communication ♦ Pan-European standard»ETSI, European Telecommunications Standardisation Institute ♦ Seamless roaming within Europe possible ♦ Many providers all over the world.

The GSM Air Interface 24 The Base Station Controller (BSC) 30 The TRAU for Voice Encoding 34 Channel Coder and Interleaver in the BTS 38 Ciphering in the BTS and Security Aspects 39 Modulation 42 Voice Activity Detection 43 Mobility Management and Call Control 44 Call Reselection and Location Area Update generation air interface in the TETRA standard, responsive modulation.

Mobile WiMAX, IEEE m, IEEEthe transition from fixed to mobile wireless access. Satellite mobile communication systems. Radio - location and its application in mobile communication systems.

Radio -location systems: terrestrial, satellite – GPS and GLONAS. cation.

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Besides communication, more and more additional services - like payment functionality - are being deployed on top of GSM. It has been over 20 years since GSM was designed, and in that time several security problems have been found, both in the protocols and in the - originally secret.

Mobile Communications Chapter 4: Wireless Telecommunication Systems slides by Jochen Schiller Global System for Mobile Communication qPan-European standard open interface with 16 kbit/s user channels q A: standardized, open interface with 64 kbit/s user channels.

Global System for Mobile Communication Technology Mobile Device Investigations Program Technical Operations Division. DHS - FLETC. GSM Technology Global System for Mobile Communication or Groupe Special Mobile To standardize cellular communication thoughout Europe.

technology as their air interface standard. TDMA has limited capabilities. GSM FDMA Structure. Two 25 MHz wide frequency bands are assigned for GSM in Europe, used in frequency division duplex (FDD) mode: { to MHz: uplink (mobile to BTS) { to MHz: downlink (BTS to mobile) Extension bands are planned Channels 1 and should not be used to protect neighboring : Andreas Willig.

GSM is a circuit-switched system that divides each kHz channel into eight 25 kHz time-slots. GSM operates on the mobile communication bands MHz and MHz in most parts of the world.

In the US, GSM operates in the bands MHz and MHz. GSM owns a market share of more than 70 percent of the world's digital cellular subscribers. The GSM air interface of radio interface was given a considerable amount of thought and includes some features that mean that it operates very well and reduces the cost of the mobiles.

The form of modulation used is easy to generate and enables the handset power amplifiers to operate efficiently whilst also enabling sufficient data to be. GSM Air Interface Course Description This course builds on the GSM and GPRS System Engineering course and focuses on the specifics associated with the air interface when supporting voice and SMS services.

This includes analysis of the various physical and logical channels and the associated multiframes and protocols. The. A interface The A interface is used to provide communication between the BSS and the MSC.

The interface carries information to enable the channels, timeslots and the like to be allocated to the mobile equipments being serviced by the BSSs.

UMTS (Universal Mobile Telecommunication System) is the third generation telecommunications system based on WCDMA.

WCDMA (Wideband Code Division Multiple Access) is the radio interface for UMTS. WCDMA is characterised by use of a wider band than CDMA. It has additional advantages of high transfer rate, and increased system capacity and communication quality by statistical multiplexing, /5(3).

GSM Physical Channels • GSM employs both FDMA and TDMA at the Air Interface • Each BTS may comprise a number of TRXs, with the carrier of each TRX operating on a different frequency (FDM) • Each GSM carrier supports 8 time-separated physical channels (TDMA) • Each physical channel is allocated to a specific timeslot on the carrier.

Details GSM air interface over mobile satellite communication channel PDF

GSM is the most widely accepted standard in telecommunications and it is implemented globally. GSM is a circuit-switched system that divides each kHz channel into eight 25 kHz time-slots. GSM operates on the mobile communication bands MHz and MHz in most parts of the world.

AdvAnTAGeS oF GSM Communication – mobile, wireless communication, support for voice and data services Total mobility – international access, chip-card enables use of access points of different providers.

Worldwide connectivity – one number, the network handles every location. High capacity – better frequency efficiency, smaller cells. NB-IoT runs in the mobile telephone radio spectrum, and piggybacks on old, unused GSM channels, or free space between LTE channels.

Needs an expensive dedicated regional frequency/channel: km: W (max) NB-IoT inherits LTE’s authentication and encryption. Upgrading of GSM based systems. Mostly for sensor readings, tracking and fleet.

In the Europe and Asia, the GSM operates in to MHz frequency range, whereas in United States and other American countries, it operates in the to MHz frequency range. It uses the digital air interface wherein the analog signals are converted to digital signals before transmission.

The transmission speed is Kbps. changes name: Global System for Mobile communication First Official Commercial launch in Europe Telcom 7 First Official Commercial launch in Europe GSM Specifications ported to MHz band GSM is the most popular 2G tec hnology and still the most popular technology ~ 70% of phones worldwide are GSM only or GSM.

Mário Jorge Leitão GSM 3 Performance characteristics of GSM Communication mobile, wireless communication; support for voice and data services Total mobility international access, chip-card enables use of access points of different providers Worldwide connectivity one number, the network handles localization High capacity better frequency efficiency, smaller cells, more customers per cellFile Size: KB.

GSM interface Description with position; Um: It is the air interface used between MS and carries the GSM bursts carrying data and control information.

Also referred as Air interface. A or Asub: It is used between BSC and MSC/VLR. It supports 2Mbps standard digital connection as per CCITT. Abis: It is used between BTS and BSC. This GSM tutorial covers GSM basics, gsm architecture and gsm system features.

This basic tutorial on gsm architecture also covers GSM burst types, GSM frame structure, gsm channels, gsm physical layer and so on. GSM introduction. GSM is the short form of Global System for Mobile Communications.

It is called 2G or Second Generation technology. 1. GSM CHANNELS Prepared by: Mohd Nazir Shakeel 2. Introduction • In telecommunications a channel, refers either to a physical transmission medium such as a wire, or to a logical connection over a multiplexed medium such as a radio channel.

• The channel used in the air interface is divided into two types: Physical channel and Logical channel.

Description GSM air interface over mobile satellite communication channel FB2

The book concentrates on the interfaces between the known GSM network elements and the new subsystems -- PCU, SGSN, and GGSN -- that come with GPRS. It offers you an in-depth explanation of the extensions and methods of the GSM air interface necessary for GPRS and shows how the channel-oriented GSM is linked to the packet switched GPRS.

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 digital cellular networks used by mobile devices such as mobile phones and tablets. It was first deployed in Finland in December By the mids, it became a global standard for mobile communications.

GSM Global System For Mobile Communication GSM Architecture NSS BSS MS BSC BTS MSC HLR VLR EIR AuC All These Explained Within 5 Minutes GOOD NEWS FOR COMPUTER ENGINEERS INTRODUCING 5-MINUTES. UMTS combines three different terrestrial air interfaces, GSM's Mobile Application Part (MAP) core, and the GSM family of speech codecs.

The air interfaces are called UMTS Terrestrial Radio Access (UTRA). All air interface options are part of ITU's IMTIn the currently most popular variant for cellular mobile telephones, W-CDMA (IMT Direct Spread) is used.

UMTS Channel Structure on the Air Interface User Plane and Control Plane GSM, UMTS and other fixed and wireless communication systems differentiate between two kinds of data flows.

- Selection from From GSM to LTE: An Introduction to Mobile Networks and Mobile Broadband [Book]. What Are GSM Frequency Bands, ARFCNs And FDMA/TDMA Channels - Duration: Moazzam Tiw views.International Journal of Satellite Communications.

Vol Issue 6, pages –, November/December Additional Information.