- GSM is a standard for 2G digital cellular networks that uses narrowband TDMA. It describes protocols for features like GPRS, EDGE, authentication, encryption, and more.
- The GSM architecture consists of mobile equipment (handsets), a base station subsystem for radio network management, a network switching subsystem for call routing, and a network management subsystem.
- Key aspects include the SIM card for user identification, base transceiver stations for radio signals, transcoding between speech formats, home and visitor location registers for subscriber data, and authentication/equipment databases.
This documents will cover basic LTE principles along with some brief impression about LTE features. Additionally, LTE Link Budget, LTE Coverage & Capacity Planning and Cell Radius calculation methodology have been depicted comprehensively in this document.
This documents will cover basic LTE principles along with some brief impression about LTE features. Additionally, LTE Link Budget, LTE Coverage & Capacity Planning and Cell Radius calculation methodology have been depicted comprehensively in this document.
This presentation provides an introduction to Mobile Cellular Macrocells & Small Cells. It looks at Macrocell components and different terminology associated with it. It also looks at Distributed Antenna Systems (DAS). Then it looks at the need for small cells, different definitions and types of small cells. It also looks at some interesting examples of small cells, especially on drones and helikites. Finally it looks at the difference between boosters, repeaters, relays and small cells.
These are the slides of the talk "Putting the citizens at the center of the network: Cell-free architectures" that I delivered at the IEEE 5G Summit held in Montreal today!
This slide for your understanding on LTE !
LTE, the wireless access protocol for 4G mobile network service, has evolved from GSM and WCDMA based on 3GPP!
The contents of this slide is below;
I. LTE Introduction
II. LTE Protocol Layer
III. SAE Architecture
IV. NAS(Non Access Stratum) Protocols
V. EPC Protocol Stacks
With my regards,
Guisun Han
This presentation provides an introduction to Mobile Cellular Macrocells & Small Cells. It looks at Macrocell components and different terminology associated with it. It also looks at Distributed Antenna Systems (DAS). Then it looks at the need for small cells, different definitions and types of small cells. It also looks at some interesting examples of small cells, especially on drones and helikites. Finally it looks at the difference between boosters, repeaters, relays and small cells.
These are the slides of the talk "Putting the citizens at the center of the network: Cell-free architectures" that I delivered at the IEEE 5G Summit held in Montreal today!
This slide for your understanding on LTE !
LTE, the wireless access protocol for 4G mobile network service, has evolved from GSM and WCDMA based on 3GPP!
The contents of this slide is below;
I. LTE Introduction
II. LTE Protocol Layer
III. SAE Architecture
IV. NAS(Non Access Stratum) Protocols
V. EPC Protocol Stacks
With my regards,
Guisun Han
Bankers on Active Community Service (BACS)misachievement
Bankers on Active Community Service is a three-man walkabout street theatre performance by The Delegates. In the show, two characters are Ex-Bankers who seek redemption from the banking scandals they perpetrated. Closely supervised by their Parole Officer, they undertake small domestic cleaning tasks as a symbolic method of performing both an apology, and demonstrating public restitution.
Their method of repayment is the BACS scheme.
This PowerPoint documents a performance in London, July 2013.
Palestine last event orientationfvgnh .pptxRaedMohamed3
An EFL lesson about the current events in Palestine. It is intended to be for intermediate students who wish to increase their listening skills through a short lesson in power point.
Read| The latest issue of The Challenger is here! We are thrilled to announce that our school paper has qualified for the NATIONAL SCHOOLS PRESS CONFERENCE (NSPC) 2024. Thank you for your unwavering support and trust. Dive into the stories that made us stand out!
2024.06.01 Introducing a competency framework for languag learning materials ...Sandy Millin
http://sandymillin.wordpress.com/iateflwebinar2024
Published classroom materials form the basis of syllabuses, drive teacher professional development, and have a potentially huge influence on learners, teachers and education systems. All teachers also create their own materials, whether a few sentences on a blackboard, a highly-structured fully-realised online course, or anything in between. Despite this, the knowledge and skills needed to create effective language learning materials are rarely part of teacher training, and are mostly learnt by trial and error.
Knowledge and skills frameworks, generally called competency frameworks, for ELT teachers, trainers and managers have existed for a few years now. However, until I created one for my MA dissertation, there wasn’t one drawing together what we need to know and do to be able to effectively produce language learning materials.
This webinar will introduce you to my framework, highlighting the key competencies I identified from my research. It will also show how anybody involved in language teaching (any language, not just English!), teacher training, managing schools or developing language learning materials can benefit from using the framework.
June 3, 2024 Anti-Semitism Letter Sent to MIT President Kornbluth and MIT Cor...Levi Shapiro
Letter from the Congress of the United States regarding Anti-Semitism sent June 3rd to MIT President Sally Kornbluth, MIT Corp Chair, Mark Gorenberg
Dear Dr. Kornbluth and Mr. Gorenberg,
The US House of Representatives is deeply concerned by ongoing and pervasive acts of antisemitic
harassment and intimidation at the Massachusetts Institute of Technology (MIT). Failing to act decisively to ensure a safe learning environment for all students would be a grave dereliction of your responsibilities as President of MIT and Chair of the MIT Corporation.
This Congress will not stand idly by and allow an environment hostile to Jewish students to persist. The House believes that your institution is in violation of Title VI of the Civil Rights Act, and the inability or
unwillingness to rectify this violation through action requires accountability.
Postsecondary education is a unique opportunity for students to learn and have their ideas and beliefs challenged. However, universities receiving hundreds of millions of federal funds annually have denied
students that opportunity and have been hijacked to become venues for the promotion of terrorism, antisemitic harassment and intimidation, unlawful encampments, and in some cases, assaults and riots.
The House of Representatives will not countenance the use of federal funds to indoctrinate students into hateful, antisemitic, anti-American supporters of terrorism. Investigations into campus antisemitism by the Committee on Education and the Workforce and the Committee on Ways and Means have been expanded into a Congress-wide probe across all relevant jurisdictions to address this national crisis. The undersigned Committees will conduct oversight into the use of federal funds at MIT and its learning environment under authorities granted to each Committee.
• The Committee on Education and the Workforce has been investigating your institution since December 7, 2023. The Committee has broad jurisdiction over postsecondary education, including its compliance with Title VI of the Civil Rights Act, campus safety concerns over disruptions to the learning environment, and the awarding of federal student aid under the Higher Education Act.
• The Committee on Oversight and Accountability is investigating the sources of funding and other support flowing to groups espousing pro-Hamas propaganda and engaged in antisemitic harassment and intimidation of students. The Committee on Oversight and Accountability is the principal oversight committee of the US House of Representatives and has broad authority to investigate “any matter” at “any time” under House Rule X.
• The Committee on Ways and Means has been investigating several universities since November 15, 2023, when the Committee held a hearing entitled From Ivory Towers to Dark Corners: Investigating the Nexus Between Antisemitism, Tax-Exempt Universities, and Terror Financing. The Committee followed the hearing with letters to those institutions on January 10, 202
Model Attribute Check Company Auto PropertyCeline George
In Odoo, the multi-company feature allows you to manage multiple companies within a single Odoo database instance. Each company can have its own configurations while still sharing common resources such as products, customers, and suppliers.
Honest Reviews of Tim Han LMA Course Program.pptxtimhan337
Personal development courses are widely available today, with each one promising life-changing outcomes. Tim Han’s Life Mastery Achievers (LMA) Course has drawn a lot of interest. In addition to offering my frank assessment of Success Insider’s LMA Course, this piece examines the course’s effects via a variety of Tim Han LMA course reviews and Success Insider comments.
Macroeconomics- Movie Location
This will be used as part of your Personal Professional Portfolio once graded.
Objective:
Prepare a presentation or a paper using research, basic comparative analysis, data organization and application of economic information. You will make an informed assessment of an economic climate outside of the United States to accomplish an entertainment industry objective.
2. Intro to GSM:
• GSM (Global System for Mobile
Communication)
• It is a standard set developed by the ETSI.
• It describe protocols for 2G digital cellular
networks.
• Full duplex.
• GPRS & EDGE facilities.
4. GSM Architecture
What so ever the variants are the basic architecture
of GSM network remains the same as elaborated
below:
• BSS (Base Station Subsystem)
• NSS ( Network Switching Subsystem )
• NMS ( Network Management Subsystem )
7. Handset:
• is a device that can make and
receive telephone calls
• over a radio link
• Can moving around a wide
geographic area.
8. SIM:
Subscriber identification module
It contains
• IMSI ( international mobile subscriber identity )
• PIN (personal identification number )
• PUK ( personal un blocking code )
• ICCID ( integrated circuit card identification )
9. • IMSI ( used by operators to identify user)
• IMSI = MCC+MNC+MSIN
i. MCC ( mobile country code)
ii. MNC ( mobile network code)
iii. MSIN ( mobile user identification number )
• ICCID (SIM is internationally recognized by this
number )
• Usually printed on SIM
10. Base Station Subsystem:
• The Base Station Subsystem is responsible for
managing the radio network, and it is controlled
by an MSC.
• A BSS itself may cover a considerably large
geographical area consisting of many cells (a cell
refers to an area covered by one or more
frequency resources).
11. BSS consists of three element
• BTS ( Base transceiver station)
• BSC ( Base station controller )
• TC ( Tran coder)
12. Base transceiver station:
• Encoding, encrypting, multiplexing,
modulating, and feeding the RF
signals to the antenna.
• Time and frequency synchronizing
• Decoding, decrypting, and equalizing
received signals
• Random access detection
• Uplink channel measurements
13. Base station controller :
• The BSC manages the radio resources for
one or more BTSs. It handles radio channel
setup, frequency hopping, and handovers.
• The BSC is the connection between the
mobile and the MSC.
• Control of frequency hopping
• Performing traffic concentration to reduce
the number of lines from the MSC
• Reallocation of frequencies among BTSs
• Time and frequency synchronization
• Power management
14. Transcoder:
• In the air interface (between MS and BTS), the
media carrying the traffic is a radio frequency.
• To enable an efficient transmission of digital
speech information over the air interface, the
digital speech signal is compressed.
• We must however also be able to communicate
with and through the fixed network, where the
speech compression format is different.
• Somewhere between the BTS and the fixed
network, we therefore have to convert from one
speech compression format to another, and this
is where the Transcoder comes in.
15. • For transmission over the air interface, the speech
signal is compressed by the mobile station to
• 13 k bit/s (Full Rate and Enhanced Full Rate),
• 5.6 k bit/s (Half Rate),
• 12.2 k bit/s (Enhanced Full Rate).
• AMR (Adaptive Multirate Coding) which is more
flexible since it produces speech with bitrates
similar to older solutions but adapted to link
conditions.
• However, the standard bit rate for speech in the
PSTN is 64 Kbits/s. The modulation technique is
called "Pulse Code Modulation" (PCM). This
requires the GSM network to perform bit rate
adaptation of speech.
16. Network switching subsystem (NSS)
NSS typically consists of following
elements
• MSC (Mobile switching center)
• HLR (Home location register )
• VLR ( visitor location register )
• AUC (Authentication center )
• EIR ( Equipment identity register)
• GMSC ( Gate way mobile switching
center )
17. HLR:
• centralized network database
• stores and manages all mobile
subscriptions belonging to a specific
operator.
• a permanent store for subscriber until
that subscription is canceled.
It stores
1. Subscriber identity
2. Subscriber supplementary services
3. Subscriber location information
4. Subscriber authentication information
18. VLR :
• It is a temporary database .
• Stores only information of subscriber
those are in that MSC.
• Every MSC has its own VLR
• When a subscriber roams into a new
MSC service area, the VLR connected to
that MSC requests information about
the subscriber from the subscriber's
HLR.
19. EIR :
• Data base used to store mobile identity
• Help us blocking calls from stolen MS
20. AUC:
• AUC is a database connected to the HLR
• Function is to authenticate the subscribers
attempting to use a network.
21. MSC & GMSC:
• MSC performs the telephony switching functions
for the mobile network.
• controls calls to and from other telephony and
data systems, such as the Public Switched
Telephone Network (PSTN), Integrated Services
Digital Network (ISDN).
• In GMSC Gateway functionality enables an MSC
to interrogate a network's HLR in order to route
a call to a Mobile Station (MS).
• Any MSC can be GMSC
22. NMS:
NMS consists of two element
1. OMC ( Operation and maintenance center )
2. NMC (Network management center )
23. OMC & NMC
• OMC a computerized monitoring & maintenance
center which is connected MSCs and BSCs.
• OMC is local.
• In NMC centralized control of a network is done.
• One NMC per network to control many OMCs.
• OMC and NMC functionality can be combined in
the same physical network node.
24. GSM GEOGRAPHICAL NETWORK
STRUCTURE
Local area (LA)
• LA is as a group of cells.
• Within the network, a subscriber’s location is
known by the LA.
• The identity of the LA in which an MS is
currently located is stored in the VLR.
25. MSC SERVICE AREA
• An MSC service area is made up of a number of
LAs and
• MSC use LA to route a call to MS
28. GMSK:
• Gaussian Minimum Shift Keying.
• Gaussian Minimum Shift Keying (GMSK) is a
form of continuous-phase FSK in which the
phase change is changed between symbols to
provide a constant envelope. Consequently it is a
popular alternative to QPSK.
• The RF bandwidth is controlled by the Gaussian
low-pass filter.
30. • CPM is typically implemented as a constant-
envelope waveform.
• QPSK requires a relatively large percentage of
the power to occur outside of the intended band.
• CPM is attractive because the phase continuity
yields high spectral efficiency.
• The primary drawback is the high
implementation complexity required for an
optimal receiver.
31. MSK:
• Minimum shifting keying .
• It is similar to OQPSK
• OQPSK gives us square wave which is difficult to
handle.
• MSK gives us half cycle sinusoidal wave for a symbol
33. Gaussian filter
• Gaussian filters are designed to give no
overshoot to a step function input while
minimizing the rise and fall time.
• Gaussian filter has the minimum possible time
delay
35. signal is integrated over time to obtain a continuous
waveform which captures the bit transition information
36. • Send this wave to IQ modulator .
• Integrate out put and send it
37. ADVANTAGES DISADVANTAGES
• High spectral efficiency. • Higher power level than
• Reducing sideband QPSK.
power. • Requiring more complex
• Excellent power channel equalization
efficiency due to constant algorithms such as an
envelope. adaptive equalizer at the
• Good choice for voice receiver.
modulation. • Inter symbol interference
38. Interleaving
• Interleaving rearranges a group of bits in a parti
cular way.
• Improve the performance of the error correction
mechanisms
• The interleaving decreases the possibility of
losing whole bursts during the transmission.