مختصرات 1 _GSM

موضوع: مختصرات 1 _GSM السبت أغسطس 30, 2008 9:30 am

السلام عليكم
هذه بعض مختصرات لمهندسى الاتصالات GSM
أتمنى ان تفيدكم
1G
The first generation of analogue mobile phone technologies including AMPS, TACS and NMT

2G
The second generation of digital mobile phone technologies including GSM, CDMA IS-95 and D-AMPS IS-136

2.5G
The enhancement of GSM which includes technologies such as GPRS

3G
The third generation of mobile phone technologies covered by the ITU IMT-2000 family

3GPP
The 3rd Generation Partnership Project, a grouping of international standards bodies, operators and vendors with the responsibility of standardising the WCDMA based members of the IMT-2000 family

3GPP2
The counterpart of 3GPP with responsibility for standardising the CDMA2000-based members of the IMT-2000 family. 3GPP2 is spearheaded by ANSI

8PSK
Octantal Phase Shift Keying
[ندعوك للتسجيل في المنتدى أو التعريف بنفسك لمعاينة هذا الرابط]

A5/1/2/3/8X
Encryption algorithms for GSM networks

AAL
ATM Adaptation Layer

ABR
Available Bit Rate

A-bis
Interface between the BSC and BTS in a GSM network

AB
Access Burst; used for random access and characterised by a longer guard period to allow for burst transmission from a MS that does not know the correct timing advance when first contacting a network

ACTE
Approvals Committee for Terminal Equipment

ACTS
Advanced Communications Technologies and Services – a European technology initiative

ACU
Antenna Combining Unit

ADPCM
Adaptive Differential Pulse Code Modulation; a form of voice compression that typically uses 32kbit/s

AFC
Automatic Frequency Control

AGCH
Access Grant Channel; downlink only, BTS allocates a TCH or SDCCH to the MS, allowing it access to the network

Air interface
In a mobile phone network, the radio transmission path between the base station and the mobile terminal

A-interface
Interface between the MSC and BSS in a GSM network

AM
Amplitude Modulation

AMPS
Advanced Mobile Phone System, the analogue mobile phone technology used in North and South America and in around 35 other countries. Operates in the 800MHz band using FDMA technology

AMR
Adaptive Multi-Rate codec. Developed in 1999 for use in GSM networks, the AMR
has been adopted by 3GPP for 3G

Analogue
The representation of information by a continuously variable physical quantity such as voltage

ANSI
American National Standards Institute. An non-profit making US organisation which does not carry out standardisation work but reviews the work of standards bodies and assigns them category codes and numbers

ANSI-136
See D-AMPS

API
Application Program Interface

AoC
Advice of Charge

ARIB
Association of Radio Industries and Businesses. An organisation established by Japan’s Ministry of Posts and Communications to act as the standardisation authority for radio communication and broadcasting

ARPU
Average Revenue Per User

ASCII
American Standard Code for Information Interchange

ASIC
Application Specific Integrated Circuit

ASP
Application Service Provider

Asymmetric Transmission
Data transmissions where the traffic from the network to the subscriber is at a higher rate than the traffic from the subscriber to the network

A-TDMA
Advanced Time Division Multiple Access

ATM
Asynchronous Transfer Mode; a multiplexed information transfer and switching method in which the data is organised into fixed length 53-octet cells and transmitted according to each application’s instantaneous need

AUC
Authentication Centre; the element within a GSM network which generates the parameters for subscriber authentication

BACK TO TOP
Bandwidth
A term meaning both the width of a transmission channel in terms of Hertz and the maximum transmission speed in bits per second that it will support

BCH
Broadcast Channels; carry only downlink information and are mainly responsible for synchronisation and frequency correction (BCCH, FCCH and SCH)

BCCH
Broadcast Control Channel; the logical channel used in cellular networks to broadcast signalling and control information to all mobile phones within the network

B-CDMA
Broadband Code Division Multiple Access

B-ISDN
Broadband ISDN

BER
Bit Error Rate; the percentage of received bits in error compared to the total number of bits received

BERT
Bit Error Rate Test

Bit
A bit is the smallest unit of information technology. As bits are made up using the binary number system, all multiples of bits must be powers of two i.e. a kilobit is actually 1024 bits and a megabit 1048576 bits. Transmission speeds are given in bits per second (bit/s)

Bluetooth
A low power, short range wireless technology designed to provide a replacement for the serial cable. Operating in the 2.4GHz ISM band, Bluetooth can connect a wide range of personal, professional and domestic devices such a laptop computers and mobile phones together wirelessly.

BHCA
Busy Hour Call Attempts; the number of call attempts made during a network’s busiest hour of the day

BSC
Base Station Controller; the network entity controlling a number of Base Transceiver Stations

BSS
Base Station System/Subsystem

BTS
Base Transceiver Station; the network entity which communicates with the mobile station

موضوع: رد: مختصرات 1 _GSM الأحد أغسطس 31, 2008 6:34 pm

الف شكر يا باشمهندس طارق لمشاركاتك
الجامده دى وربنا يكرمك وترفع كمان وكمان

متشكرررررررررررررررررر جدا يا بشمهندس طارق
انا كان نفسي اعرف ازاي في جيل تالت و في جيل اتنين و نص
بصراحة ما كنتش فاهمها

موضوع: رد: مختصرات 1 _GSM السبت سبتمبر 13, 2008 3:22 am

العفو يا باشمهندس ديدو
وانا تحت امركم وانا فى الخدمه
بس انا مش لاقى تشجيع خالص

موضوع: رد: مختصرات 1 _GSM السبت سبتمبر 13, 2008 3:47 am

ان شاء الله في الدراسة ممكن الامور توضح اكتر

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