This document proposes a WiMAX VoIP solution for Bangladesh that would provide cost-effective communication services. It recommends establishing multi-purpose service centers in divisional headquarters that are connected via a fiber optic backbone and WiMAX networks. The centers would offer services like telemedicine, education, training, and support various industries. Implementing this infrastructure could promote rural development and economic opportunities in Bangladesh through affordable broadband and voice services.
Moid Kunwer -Technical Authority, EMEA Group, Motorola ; speaks on "Wimax and its introduction in Pakistan" at the event "Are you online" organised by Zumbeel
In 2002, Liberty Technologies, then exclusively an infrastructure provider to ISPs in Panama, was assigned a portion of the 3.5-GHz spectrum by the Panamanian government. Liberty launched a residential network service based on Time Division-Synchronous Code Division Multiple Access (TD-SCDMA) wireless networking technology. The company determined that deploying a wired or cable service would be prohibitively expensive and would not allow for a competitively priced broadband service. Instead, a wireless network could be deployed quickly and inexpensively and had a promising future as a WAN access technology.
Moid Kunwer -Technical Authority, EMEA Group, Motorola ; speaks on "Wimax and its introduction in Pakistan" at the event "Are you online" organised by Zumbeel
In 2002, Liberty Technologies, then exclusively an infrastructure provider to ISPs in Panama, was assigned a portion of the 3.5-GHz spectrum by the Panamanian government. Liberty launched a residential network service based on Time Division-Synchronous Code Division Multiple Access (TD-SCDMA) wireless networking technology. The company determined that deploying a wired or cable service would be prohibitively expensive and would not allow for a competitively priced broadband service. Instead, a wireless network could be deployed quickly and inexpensively and had a promising future as a WAN access technology.
a collection of Green Packet's case studies for the modems used in various scenarios and countries, leading to the success of the wimax service providers there.
a collection of Green Packet's case studies for the modems used in various scenarios and countries, leading to the success of the wimax service providers there.
Lecture on Introduction of Semiconductor at North South University as the undergraduate course (ETE411)
=======================
Dr. Mashiur Rahman
Assistant Professor
Dept. of Electrical Engineering and Computer Science
North South University, Dhaka, Bangladesh
http://mashiur.biggani.org
Lecture on Introduction of Semiconductor at North South University as the undergraduate course (ETE411)
=======================
Dr. Mashiur Rahman
Assistant Professor
Dept. of Electrical Engineering and Computer Science
North South University, Dhaka, Bangladesh
http://mashiur.biggani.org
EMERGING BROADBAND WIRELESS TECHNOLOGIES: WIFI AND WIMAXcscpconf
Now-a-days there is high demand for broadband mobile services. Traditional high-speed
broadband solutions depend on wired technologies namely digital subscriber line (DSL). Wifi
and Wimax are useful in providing any type of connectivity such as the fixed or portable or
nomadic connectivity without the requirement of LoS (Line of Sight) of the base station. Mobile
Broadband Wireless Network (MBWN) is a flexible and economical solution for remote areas
where wired technology and also terminal mobility cannot be provided. The IEEE Wi-Fi and
Wi-Max/802.16 are the most promising technologies for broadband wireless metropolitan area networks (WMANs) and these are capable of providing high throughput even on long distances with varied QoS. These technologies ensure a wireless network that enables high speed Internet access to residential, small and medium business customers, as well as Internet access for WiFi hot spots and cellular base stations. These offer support to both point-to-multipoint (P2MP) and multipoint-to-multipoint (mesh) nodes and offers high speed data (voice, video) service to the customers. In this paper, we study the issues related to, benefits and deployment of these technologies.
Senza Fili Leveraging802.16e Wi Max 091111Monica Paolini
License-exempt spectrum bands make it possible for operators who do not have access to licensed spectrum to deploy wireless broadband networks. Traditionally vendors have developed specific solutions for license-exempt operators, often based on proprietary technology that limits the flexibility and upgradability of their networks.
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We just finished a white paper that addresses these questions by looking at operators' requirements and how 802.16e WiMAX meets them.
GraphRAG is All You need? LLM & Knowledge GraphGuy Korland
Guy Korland, CEO and Co-founder of FalkorDB, will review two articles on the integration of language models with knowledge graphs.
1. Unifying Large Language Models and Knowledge Graphs: A Roadmap.
https://arxiv.org/abs/2306.08302
2. Microsoft Research's GraphRAG paper and a review paper on various uses of knowledge graphs:
https://www.microsoft.com/en-us/research/blog/graphrag-unlocking-llm-discovery-on-narrative-private-data/
LF Energy Webinar: Electrical Grid Modelling and Simulation Through PowSyBl -...DanBrown980551
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During the webinar, you will discover the PowSyBl ecosystem as well as handle and study an electrical network through an interactive Python notebook.
PowSyBl is an open source project hosted by LF Energy, which offers a comprehensive set of features for electrical grid modelling and simulation. Among other advanced features, PowSyBl provides:
- A fully editable and extendable library for grid component modelling;
- Visualization tools to display your network;
- Grid simulation tools, such as power flows, security analyses (with or without remedial actions) and sensitivity analyses;
The framework is mostly written in Java, with a Python binding so that Python developers can access PowSyBl functionalities as well.
What you will learn during the webinar:
- For beginners: discover PowSyBl's functionalities through a quick general presentation and the notebook, without needing any expert coding skills;
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In his public lecture, Christian Timmerer provides insights into the fascinating history of video streaming, starting from its humble beginnings before YouTube to the groundbreaking technologies that now dominate platforms like Netflix and ORF ON. Timmerer also presents provocative contributions of his own that have significantly influenced the industry. He concludes by looking at future challenges and invites the audience to join in a discussion.
The Art of the Pitch: WordPress Relationships and SalesLaura Byrne
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Securing your Kubernetes cluster_ a step-by-step guide to success !KatiaHIMEUR1
Today, after several years of existence, an extremely active community and an ultra-dynamic ecosystem, Kubernetes has established itself as the de facto standard in container orchestration. Thanks to a wide range of managed services, it has never been so easy to set up a ready-to-use Kubernetes cluster.
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The Metaverse and AI: how can decision-makers harness the Metaverse for their...Jen Stirrup
The Metaverse is popularized in science fiction, and now it is becoming closer to being a part of our daily lives through the use of social media and shopping companies. How can businesses survive in a world where Artificial Intelligence is becoming the present as well as the future of technology, and how does the Metaverse fit into business strategy when futurist ideas are developing into reality at accelerated rates? How do we do this when our data isn't up to scratch? How can we move towards success with our data so we are set up for the Metaverse when it arrives?
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Encryption in Microsoft 365 - ExpertsLive Netherlands 2024Albert Hoitingh
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Monitoring and observability aren’t traditionally found in software curriculums and many of us cobble this knowledge together from whatever vendor or ecosystem we were first introduced to and whatever is a part of your current company’s observability stack.
While the dev and ops silo continues to crumble….many organizations still relegate monitoring & observability as the purview of ops, infra and SRE teams. This is a mistake - achieving a highly observable system requires collaboration up and down the stack.
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UiPath Test Automation using UiPath Test Suite series, part 4DianaGray10
Welcome to UiPath Test Automation using UiPath Test Suite series part 4. In this session, we will cover Test Manager overview along with SAP heatmap.
The UiPath Test Manager overview with SAP heatmap webinar offers a concise yet comprehensive exploration of the role of a Test Manager within SAP environments, coupled with the utilization of heatmaps for effective testing strategies.
Participants will gain insights into the responsibilities, challenges, and best practices associated with test management in SAP projects. Additionally, the webinar delves into the significance of heatmaps as a visual aid for identifying testing priorities, areas of risk, and resource allocation within SAP landscapes. Through this session, attendees can expect to enhance their understanding of test management principles while learning practical approaches to optimize testing processes in SAP environments using heatmap visualization techniques
What will you get from this session?
1. Insights into SAP testing best practices
2. Heatmap utilization for testing
3. Optimization of testing processes
4. Demo
Topics covered:
Execution from the test manager
Orchestrator execution result
Defect reporting
SAP heatmap example with demo
Speaker:
Deepak Rai, Automation Practice Lead, Boundaryless Group and UiPath MVP
Removing Uninteresting Bytes in Software FuzzingAftab Hussain
Imagine a world where software fuzzing, the process of mutating bytes in test seeds to uncover hidden and erroneous program behaviors, becomes faster and more effective. A lot depends on the initial seeds, which can significantly dictate the trajectory of a fuzzing campaign, particularly in terms of how long it takes to uncover interesting behaviour in your code. We introduce DIAR, a technique designed to speedup fuzzing campaigns by pinpointing and eliminating those uninteresting bytes in the seeds. Picture this: instead of wasting valuable resources on meaningless mutations in large, bloated seeds, DIAR removes the unnecessary bytes, streamlining the entire process.
In this work, we equipped AFL, a popular fuzzer, with DIAR and examined two critical Linux libraries -- Libxml's xmllint, a tool for parsing xml documents, and Binutil's readelf, an essential debugging and security analysis command-line tool used to display detailed information about ELF (Executable and Linkable Format). Our preliminary results show that AFL+DIAR does not only discover new paths more quickly but also achieves higher coverage overall. This work thus showcases how starting with lean and optimized seeds can lead to faster, more comprehensive fuzzing campaigns -- and DIAR helps you find such seeds.
- These are slides of the talk given at IEEE International Conference on Software Testing Verification and Validation Workshop, ICSTW 2022.
Enhancing Performance with Globus and the Science DMZGlobus
ESnet has led the way in helping national facilities—and many other institutions in the research community—configure Science DMZs and troubleshoot network issues to maximize data transfer performance. In this talk we will present a summary of approaches and tips for getting the most out of your network infrastructure using Globus Connect Server.
Enhancing Performance with Globus and the Science DMZ
Riaz Rahman (072878056)
1. Assignment : WiMAX VoIP Solution– A Cost-Efficient Way of Communication
Prepared For:
Dr. Mashiur Rahman
North South University, Dhaka.
Prepared By:
Riaz Rahman
ID: 072878056
Course: MSETE-605
Sec-2
2. WiMAX VoIP Solution– A Cost-Efficient Way of Communication
Riaz Rahman , North South University, Dhaka, Bangladesh.
E-mail- reaz.rahman@gmail.com
Abstract— With the fast development of the global WiMAX market, how to provide the
same service experience to the traditional telecom domain on WiMAX network becomes
a principal problem.Voice over IP is an important application drive for WiMAX
adoption, as voice has become a powerful tool when it is enabled across a wireless
platform. Voice over WiMAX has requirements on a high degree of mobility, wireless
access, and quality service. What is really interesting about WiMAX VoIP is that it offers
a cost structure potentially. VoIP and WiMAX are converging toward a powerful
wireless voice solution for the individual, family, or enterprise applications.
I. INTRODUCTION
In most networks, voice traffic travels over a public switched telephone network (PSTN),
while workstation and application data travels over an IP-based wide area network
(WAN). However, converged network carries both traditional data such as e-mail, FTP,
and business applications, as well as voice traffic such as telephone calls, teleconferences,
and voice mail. Most data networks use the Internet Protocol (IP) as the networking
standard for connecting their LANs and WANs. Voice traffic carried by an IP-based
network is referred to as Voice over IP (VoIP).
WiMAX, or Worldwide Interoperability of Microwave Access, is a wireless Internet
service designed to cover wide geographical areas serving large numbers of users at low
cost. WiMAX is the synonym given to the IEEE 802.16 standard defining wide area
wireless data networking. WiMAX is the standard being adopted worldwide by
manufacturers to insure inter-operability of equipment. WiMAX is considered one of the
best solutions for “last mile” distribution. Wimax is an emerging wireless networking
technology that offers the potential for higher data rates than wireless LAN technologies
such as Wi-Fi -- and over much greater distances: tens of kilometers, instead of tens of
3. meters. Wimax standards are still under discussion, however. The standard for fixed
terminals is the most advanced, but other standards for portable and mobile terminals are
also in development.
A WiMAX infrastructure will let service providers deliver VoIP to rural areas without a
backhoe. WiMAX technology to provide VoIP and data services to rural areas to avoid
local access charges.VoIP over WiMAX is attractive for both enterprises and carriers, but
challenges remain. The initial WiMAX equipment will be certified in the 2.5- and 3.5-
GHz spectrum ranges. The 2.5-GHz spectrum is owned largely by Sprint and Nextel,
while the 3.5-GHz spectrum is not available for use in the United States. This means that
any near-term WiMAX equipment deployment will likely use unlicensed spectrum,
which carries the risk of interference from other wireless devices. VoIP over WiMAX
can be made reliable and cost-effective.
II. Benefit of WiMAX VoIP
WiMAX delivers a cost-effective alternative to broadband access. Since many
businesses, organizations and communities are not zoned for cable, the local telecom
company provides the only option for broadband service. The ease of deployment for
WiMAX systems can benefit customers by bringing new competition into the
marketplace and lowering prices, or by enabling enterprises and higher-educational
institutions to set up their own private networks. The added benefit that remote WiMAX
VoIP users need less or no on-site installation significantly reduces the cost and set-up
time of delivering the service, allowing it to favorably compete with existing cable or
other wired solutions.
III. WiMAX VoIP INFRASTRUCTURE
A new, more complex and fully developed standard would be required to address both
the physical layer environment (outdoor versus indoor RF transmissions) and the Quality
of Service (QoS) needs demanded by VoIP over WiMAX.The IEEE conducted a multi-
4. year effort to develop this new standard, culminating in final approval of the 802.16a Air-
Interface Specification in January 2003. This standard has since received broad industry
support from leading equipment makers. Many WiMAX company members are active in
both the IEEE 802.16 standards development and the IEEE 802.11 efforts for VoIP over
WiMAX, and envision the combination of 802.16a and 802.11 creating a complete
wireless solution for delivering high speed Internet access to businesses, homes, and
WiFi hot spots.
Fig.1. WiMAX VoIP infrastructure
Acronyms and Abbreviations
AAA: Authentication, Authorization and Accounting PSTN: Public Switched Telephone Network
ASN: Access Service Network QoS: Quality of Service
ASN-GW: Access Service Network Gateway RRM: Radio Resource Management
BS: Base Station VLAN: Virtual Local Area Network
CSN: Connectivity Service Network VoIP: Voice over IP
FA: Frequent Assignment VPN: Virtual Private Network
IP: Internet Protocol Wi-Fi: Wireless Fidelity
IPSec: IP Security Protocol LAN: Local Area Network
WiMAX: Worldwide Interoperability for Microwave Access Forum
The 802.16a standard delivers carrierclass performance in terms of robustness and QoS
and has been designed from the ground up to deliver a suite of services over a scalable,
5. long range, high capacity "last mile" wireless communications for carriers and service
providers around the world.
In WiMAX VoIP, applications include residential broadband access-- DSL-level service
for SOHO and small businesses, T1/E1 level service for enterprise, all supporting data,
voice and video as well, wireless backhaul for hotspots and cellular tower backhaul
service to name a few.
In reviewing the standard, the technical details and features that differentiate WiMAX
certified equipment from WiFi or other technologies can best be illustrated by focusing
on the two layers addressed in the standard, the physical (PHY) or RF transmissions and
the media access control (MAC) layer design.
IV. IMPLEMENTION OF WiMAX VoIP
In 2004, Ertach deployed “The First WiMAX Network in Latin America,” providing
internet access, data transmission, and Voice over Internet Protocol (VoIP) with the
standard 802.16d. Another important milestone for Ertach was the launch of the first
Portable Broadband Network in Latin America with WiMAX Technology in August
2006. The network was launched in the city of Carlos Casares, providing broadband
internet access and VoIP to one of the largest agro-business company in Argentina and to
remote communities and enterprises in rural and suburban areas.The company has
invested more than US$23 million in the development and continuous expansion of its
WiMAX network countrywide.
VoIP over Pre-WiMAX has been successfully tested in a trial in South Africa utilizing
solutions supplied by Verso Technologies and Saab Grintek Technologies. The trials
involved Wi-Fi-compatible PDAs obtaining access to the public switched telephone
network (PSTN) via customer premise gateways. Backhauling of WiMAX technology to
an existing Telkom South Africa was accomplished through customer premise gateways.
Softswitching and gateway technologies were used to deploy the test.
6. V. PROPOSED WiMAX VoIP PLANNING FOR
BANGLADESH
Bangladesh has a lot of opportunities to use WiMAX VoIP to provide better and cost
effective services in health care sector, telemedicine, agriculture sector, interviews for
job, audio-visual conferences in public and private organization, computer training, e-
commerce, garments sector, banks, public exams etc. These services will mostly help the
poor people living in the rural area.
Some multi purpose service centers are needed to be established in different places all
over the country. In these service center most of the above services can be provided. The
target country Bangladesh is divided into six divisions. Initially six service centers can be
established in six divisional head quarters. Later district, union and thana level can be
brought under this system. All of the service centers will be connected to each other
through a control center (Star topology). Later the network could be expanded up to thana
level to make the system more convenient and effective. Figure 2 illustrates the
infrastructure of the network system. The control center will be responsible for the task
allocation and overall management of the service centers. High speed communication is
very essential between the control center and the service centers. Existing Fiber optic
backbone throughout Bangladesh could provide a very high bandwidth communication
between the control center and the service centers. Service centers should have all the
cutting edge facilities of the modern technology. Each center will be equipped with
modern VoIP equipment. One center may contain about 100 personal computers
connected on LAN fashion, Internet, database server, audio-visual facilities etc. Fig. 3
illustrates the typical configuration of an service center. The divisional service centers
could act as the control center for all the districts under the division. The centers under
one division will form a LAN to communicate with each other. The medium of the LAN
will depend on the terrain and environmental conditions. Several alternatives, such as
ADSL, 3G wireless, LMDS exist. It is believed that WiMAX can provide an excellent
solution for last-mile distribution with speeds up to tens of Mbps. Generally, the
microwave link will be more preferable than the VSAT link because of the cost-
effectiveness.
7. Fig. 2. The proposed service infrastructure showing the control center with six divisional
cities along with the districts under them
The service centers could provide a number of services to the citizens of the country. The
service centers can promote development of telemedicine network in Bangladesh,
establishment of a virtual medical library, computer literacy programs for medical
professionals and health training for mass people. These centers could be used for various
technical training and educational purposes. Young people can be trained to develop
professional software, as the global software market is open for all, these people can sell
their software globally. About 50% population of Bangladesh are women but their
contribution in national development is significantly low. The government already took
some steps to improve these conditions. service centers can also be a part of these
improvements. These centers can be used to train women and help them to become
effective human resource for the country. Service centers can be used on this purpose
also. Garment sector of the country has now become an over 2.5-billion-dollar-foreign-
exchange-earner, enjoying the status of 5th largest garment exporter and largest shirt and
T-shirt exporter to the EU and 6th largest apparel exporter to USA. Bangladesh now
exports ready-made garments to as many as 30 countries of the world with EU as the
major importer, followed by USA, the largest importing country. Most of the garment
8. industries are Dhaka (Capital of Bangladesh) centered. So VoIP over WiMAX is the best
solution for deployment of garment sector rural areas of the country for national
communication and international communication between importer and exporter.
Fig. 4: Service center configuration.
V. CONCLUSIONS
In this paper, a cost effective WiMAX VoIP infrastructure has been proposed.
Ultimately, the technical challenges can be addressed and the market opportunity for
WiMAX VoIP service can then begin to develop in Bangladesh.