The evolution of information superhighway through internet technology has generated unlimited prospect for learning, developing and rendering service provisioning. To tap the benefits and to build a knowledge-based information society,
needs to ensure superior
service platform, affordable and easy access to the ICT for its customers.
Broadband presents a platform for faster aceess and a wide range of value-added
service through different applications. Considering the fact, the Government
has decided to build Digital Bangladesh by 2021. Exclusive plans have already
been taken to achieve this goal. Action programs are going on as per approved
ILDTS (International Long Distance Telecommunication Service), NBP (National
Broadband Policy) and ICT policies. For example to achieve broadband pentration
of 30% by the end of 2015, following targets have been set in NBP: Bangladesh
• To connect all the villages with the broadband through community access points.
• To connect all the higher secondary, secondary and government/MPO listed educational institutions with the broadband.
• To connect all the cultural centres, museums, post offices and archives to the broadband network.
• To bring all the union parishad offices under the broadban network.
• To bring all the farmers market under the broadband network.
Definition of Broadband
Broadband is now commonly used to denote fast speed data communication which replaces conventional dial-up technologies. Any speed equal to or above the usual speed of internet is termed as Broadband. Considering the situation of
, NBP 2009 defined
broadband as an ‘always on’ data/ internet connection that ensures a minimum
bandwidth of of 128 kbps subject to its revision as and when necessary. This
minimum level of bandwidth shall be ensured at the subscriber’s end.” Bangladesh
Wireless Broadband by 4G
4G, short for fourth generation, is the fourth generation of mobile telecommunication
technology succeeding 3G. A 4G system, in addition to usual voice & othet services of 3G system, provides mobile ultra-broadband internet access, for example to laptops with wireless modems, to smartphone, and to other mobile devices. Conceivable applications
include amended mobile web access, IP telephony, gaming services, high-definition mobile TV, video conferencing, 3D television & cloud computing.
Technical Specifications of 4G
The specifics of the 4G network include better reception, with less dropped data, and faster information exchanges. In March 2008, the ITU-R specified a set of requirements for 4G standards, named the International Mobile Telecommunications Advanced
(IMT-Advanced) specifications. An IMT-Advanced cellular system must fulfill the
* Sub-Divisional Engineer, Bangladesh Telecommunications Company Limited
WORLD TELECOMMUNICATION AND INFORMATION SOCIETY DAY 2014
• Be based on an all-IP packet switched network.
• Have peak data rates of up to approximately 100 Mbit/s for high mobility such as mobile access and up to approximately 1 Gbit/s for low mobility such as normadic/local wireless access.
• Be able to dynamically share and use the network resources to support more simultaneous users per cell.
• Using scalable channel bandwidths of 5-20 MHz, optionally up to 40 MHz.
• Have peak link spectral efficiency of 15 bit/s in the ownlink and 6.75 bit/s in the uplink.
• System spectral efficiency of up to 3 bit/s/Hz/cell in the downlink and 2.25 bit/s/Hz/cell for indoor usage.
• Smooth handovers across heterogeneous networks.
• The ability to offer high quality of service for next generation multimedia support.
Commercially Deployed 4G Mobiles
Two 4G candidate systems are commercially deployed, though there is some debate regarding their status:
(1) the Mobile WiMAX standard
(2) the Long Term Evolution (LTE) standard.
Mobile WiMAX (Worldwide Interoperability for
It’s a wireless communications standard ratified by WiMAX Forum. Features of
• Known as
Broadband Wireless Access (MBWA).
• Offers peak data rates of 128 Mbit/s in downlink and 56 Mbit/s in uplink over 20 MHz wide channels.
• Provides a wireless alternative to cable and Digital Subscriber Line (DSL) for "last mile" broadband access.
• Provides data, telecommunications (VoIP) and IPTV services.
• Originally based on IEEE 802.16e-2005 which was revised, such as 802.16m-2011.
• 802.16e-2005 uses scalable Orthogonal Frequency Division Multiple Access (OFDMA) Time Dvision Duplex (TDD).
• 802.16e-2005 brings multiple antenna support through MIMO (Multiple Input Multiple Output).
• It’s a long range system, covering many kilometres, that uses licensed or unlicensed spectrum to deliver connection to a network.
• Limited roaming service. The world’s first commercial Mobile WiMAX service was opened by KT in
in June 2006. Sprint in Seoul, South
has begun using Mobile WiMAX as of USA 29 September 2008, branding it as a “4G” network. In Russia, and Nicaragua WiMAX
broadband internet access is offered by a Russian company and is also branded
4G, Yota. Mobile WiMAX is not available for the European market since April
LTE (Long Term Evolution)
Commonly marketed as 4G LTE, is a standard for wireless data communications technology and is part of the GSM evolutionary path, following EDGE, UMTS, HSPA (HSDPA and HSUPA combined) and HSPA Evolution (HSPA+). It supports IP-based voice, data, video and messaging traffic. The capacity and speed of wireless data networks are increased by use of new DSP (Digital Signal Processing) techniques and modulations. Network architecture is of IP-based. The standard is developed by the 3GPP (3rd Generation Partnership Project) and is specified in its Release 8 document series, with minor enhancements described in Release 9.
WORLD TELECOMMUNICATION AND INFORMATION SOCIETY DAY 2014 39
Features of LTE:
• Theoritical peak speed: 100 Mbit/s in download and 50 Mbit/s in upload if a 20 MHz channel is used.
• Has the ability to manage fast-moving mobiles and supports multi-cast and broadcast streams.
• Supports only packet switching with its all-IP network. The IP-based network architecture, called the Evolved Packet Core (EPC) and designed to replace the GPRS Core Network, supports seamless handovers for both voice and data to cell towers.
• Physical radio interface was High Speed OFDM Packet Access (HSOPA), now named Evolved UMTS Terrestrial Radio Access (E-UTRA).
• Support for both FDD and TDD communication systems as well as half-duplex FDD with the same radio access technology.
• Simplified architecture: The network side of E-UTRAN is composed only of eNodeBs. The eNodeB performs tasks similar to those performed by the NodeBs and RNC (Radio Network Controller) together in UTRAN. eNodeBs are connected to each other via the X2 interface, and they connect to the packet switched (PS) core network via the S1 interface.
• Packet switched radio interface.
• Support for inter-operation and co-existence with legacy standards (e.g., GSM/EDGE, UMTS and CDMA2000). Users can start a call or transfer of data in an area using an LTE standard, and, should coverage be unavailable, continue the operation without any action on their part using GSM/GPRS or W-CDMA-based UMTS.
• Increased spectrum flexibility: 1.4 MHz, 3 MHz, 5 MHz, 10 MHz, 15 MHz and 20 MHz wide cells are standardized.
• Support for all frequency bands currently used by IMT systems by ITU-R.
• Use smart antenna arrays MIMO. The world's first publicly available LTE service was launched by TeliaSonera in
Stockholm (Ericsson and Nokia Siemens
Networks systems) and
(Huawei system) on Oslo December
14, 2009. As of November 2012, the five publicly available LTE
were provided by (a) MetroPCS (b) Verizon Wireless (c) AT&T Mobility, U.S. Cellular
(d) Sprint (e) T-Mobile US. Airtel launched the LTE service in USA
in April 2012. T-Mobile Hungary has offered commercial 4G LTE services since India 1 January 2012. In ,
SK Telecom and LG U+ have enabled access to LTE service since South Korea 1 July 2011 for data
devices. KT Telecom completed the nationwide LTE service by June 2012. In the ,
LTE service launced by EE in October 2012 and by O2 and Vodafone in August
2013. Adoption of LTE technology in the world as of UK February 15, 2014.
Countries with commercial LTE service Countries with commercial LTE network deployment on-going or planned Countries with LTE trial systems (pre-commitment)
WORLD TELECOMMUNICATION AND INFORMATION SOCIETY DAY 2014
Commercial 4G Vs. True 4G- View of ITU-R
Although marketed as a 4G wireless service, first-release versions of Mobile WiMAX and LTE are not fully IMT-Advanced compliant. However, due to marketing pressures and the significant advancements that WiMAX, HSPA+ and LTE bring to the original 3G technologies, ITU later decided that LTE together with the aforementioned technologies can be called 4G technologies. Mobile WiMAX Release 2 (also known as WirelessMAN Advanced) standardized by IEEE 802.16m and LTE Advanced (LTE-A) standardized by 3GPP are IMT-Advanced compliant. And to differentiate LTE Advanced and WirelessMAN Advanced from current 4G technologies, ITU has defined them as "True 4G".
LTE Advanced- True 4G
LTE Advanced is a candidate for IMT-Advanced standard, formally submitted by 3GPP organization to ITU-T in the fall 2009.
• It’s not a new technology, but rather an improvement on the existing LTE network.
• Similar to the upgrade from WCDMA to HSPA.
• LTE and LTE-Advanced will also make use of additional spectrums and multiplexing to allow it to achieve higher data speeds.
will allow more system
capacity to help handle the enhanced data speeds. Multi-point Transmission
• Release 10 of LTE (LTE Advanced) is expected to achieve the IMT Advanced speeds. Peak download: 1 Gbit/s Peak upload: 500 Mbit/s
IEEE 802.16m or WirelessMAN Advanced-True 4G
It’s under development with the objective to fulfill the IMT-Advanced criteria of 1 Gbit/s for stationary reception and 100 Mbit/s for mobile reception.
Present Broadband Scenario of
At this moment, three types of infrastructures are being used in
for providing broadband
internet services: (1) Fiber optic cables (2) WiMAX (3) 3G Mobile Network. Among
them, Third Generation (3G) mobile telecommunication network is being used for making
video calls, high speed internet (UMTS, HSPA) and for many day-to-day economic
activities. 5 (five) GSM Mobile phone operators are now providing 3G services.
For this, BTRC has issued 10 MHz spectrum license to Teletalk and Grameen Phone,
5 MHz each to Robi, Banglalink and Airtel. On the other side, Qubee and
Banglalion are providing 4G Wireless Broadband service using 4G WiMAX technology.
BTRC has assigned 35 MHz frequency to each from 2.3GHz and 2.5 GHz band.
Recently, Banglalion has obtained the permission from BTRC to deploy more advanced
TD-LTE (Time Division Long Term Evolution) network with existing frequency to provide
Broadband Wireless Access services nationwide. Through this technology, Banglalion
would be able to provide even faster mobile broadband connectivity more effectively.
LTE would enable the customers to enjoy blazing speed and more stable, uninterrupted
connectivity in both fixed and on the go environment. Banglalion is expecting
to start offering LTE based services from Mid 2014. After awarding the WiMAX as
well as the 3G license, the internet penetration of the country has increased significantly.
At present, the number of internet subscriber in Bangladesh is about 37 million. 56
percent of the district towns of Bangladesh are now under wireless
broadband network. Increase of internet users is clear from the below table: Bangladesh
Table: Total number of Internet Subscribers in
in March 2013 & March 2014 (Source: BTRC web site) Category Subscribers (in thousands) March 2013 March 2014 Bangladesh
Mobile Internet 30099.166 35336.011
ISP + PSTN 1220.62 1228.02
WiMAX 481.559 301.73
Total 31801.345 36865.756
WORLD TELECOMMUNICATION AND INFORMATION SOCIETY DAY 2014 41
In the mean time, government has decided to introduce mobile broadband (4G LTE) service in the country through BTCL. For this a project, financed by EDCF,
has been taken naming
“Installation of Wireless Broadband network for Digital Bangladesh (4G, LTE)”.
Aim is to provide blanket coverage for broadband access. 3G will provide broadband
accessibility to mobile devices (mobile hand set or Tablet), while LTE is for broadband
access for PCs or Laptops. For extensive network coverage eNodeB BTS will be
installed at all metropolitan cities, District HQ, Upazila and growth centers. To
increase internet penetration, BTRC has lowered the bandwidth price after
analyzing the overall scenario and consulting with the ministry. Lowering the
price of bandwidth will have effect on spreading the internet service at the
grass-root level and developing the telecommunication infrastructure. But it
has also been observed that the cost of establishing the infrastructure to
reach the internet to the people of remote areas of Korea is very high. If the
infrastructure cost can be reduced then it is possible to rip the benefit of
lowering the bandwidth price. Bangladesh
Prospect of 4G in
Since government has decided to make “Digital Bangladesh” by 2021, hence mobile broadband internet facility has to be extended to all district headquarters, upozilla headquarters and subsequently to important union parishads. The bandwidth capacity and availability have to be ensured all over the country at a reasonable cost to encourage the growth of internet, e-commerce, e-health, ICT industries and e-government (e-forms, e procurement, e-recruitment, e-results etc), transportation, tourism, agriculture, environment etc. Since 4G provides very high speed internet, has mobility and maintenance is comparatively easier with respect to fixed high speed fibre optic network, hence it can be used in all important government and corporate offices, educational institutions and libraries etc. It can be used to improve the efficiency, availability and reach of private and public sector services in areas of health, education, and government services.
When we use the slogan “Digital Bangladesh”, then at first comes the question of broadband internet. If anyone wants to see the dream of “Sonar
” without broadband
services in mass population level, then it will be a wrong thinking. Because if
we consider the concept of Digital Bangladesh, then broadband services will be
the next fundamental right of mass people of Bangladesh after food, clothes and
accommodation. And it’s our idea that except mobile network it will be not possible
for us to provide broadband services at all location of our country within the
next few decades. Broadband is transforming the people’s way of communicating,
doing business and accessing the information. Considering further development
in telecommunication and ICT sector, there is a huge prospect for 4G mobile broadband
internet services. Proper implementation and utilization of 3G & 4G technology
will pave the way towards achieving the goal of Digital Bangladesh set by Bangladesh
2. http://en.wikipedia.org/wiki/LTE_(Telecom munication)
8. My writeup about 3G published in BUET87 Foundation Suvenior in 2012