technology

Academic Research on New Challenges in Wireless Communications

University researchers have made significant contributions to the field of wireless communications for many years. A large number of dissertations and thesis reports have been published, incorporating the results of laboratory experiments and simulations which have proven to be very useful in determining the actual performance of technologies amid all the marketing claims made by OEMs and service providers. In addition, we must not detract from the fact that academia has played a basic role in the development of new technologies that have shaped the future of wireless communications. I want to specifically mention the development of wireless sensor networking through various projects sponsored by IEEE and ZigBee Alliance and other organizations which ultimately resulted in open global standards such as ZigBee and IEEE 802.15.4 and the company has sponsored proprietary standards such as Texas Instruments SimpliciTI and XBee DigiMesh. These technologies use a number of algorithms / protocols such as ANT COLONY, SPIN, GOSSIP, FLOOD, etc. which were developed by graduate students in wireless communications. In this blog, I present here some new challenges that students should undertake to support the changing directions of new technologies engaged in a kind of technological warfare across the world. Some of the challenges requiring academic attention are:

(a) Positioning of WiMAX over LTE in fixed and mobile wireless communications applications – is IEEE 802.16e-2005 as successful as IEEE 802.16d-2004 in light of the competition with LTE ?
(b) TTR-R2 vs. LTE – are they entering another tech war of the future?
(c) Who will win the race to become valid 4G technology – LTE or WiMAX or both?
(d) Will the IP multimedia subsystem see the light of day in the world’s largest telecommunications markets – such as India and China?
(e) How will IEEE 802.11n stack up against its predecessors and WiMAX for indoor wireless applications?
(f) What will happen to the large number of IEEE 802.11n WiFi Alliance certified products after the ratification of the IEEE 802.11e standard for a true implementation of QoS (having both EDCF and HCF) ?
(g) Does IP multimedia over wireless show synergies between several technologies – WiFi, WiMax, 3G and LTE?
(h) Will the dream of a global location server for the SIP addresses of mobile phone users, regardless of country and service provider, ever come true?
(i) How do wireless solutions based on SIP and the IP v6 address space come together?
(j) Positioning of 4G contenders on user devices – laptops, PDAs, Pocket PCs, tablets, mobile handsets, iPods, etc.
(k) Positioning WiMAX and LTE as return links – can they replace fiber optic links?
(l) QoS for VoIP over satellite links – the only solution left to connect high altitude cities to metropolitan cities via mobile telephony.

A number of professional research has been published recently to address these areas. Many of them claim to be impartial. But I personally believe that academic researchers, known to conduct more unbiased and valid studies, have yet to adequately contribute to these areas. I suggest that students taking advanced courses in wireless communications develop new topics in these areas and conduct research for their future thesis and research projects. If all the current challenges are put on the table, I can visualize over 100 topics on which students and academic researchers can undertake research assignments. Some of these topics have already been addressed by students, but a greater contribution is required from the academic world. Tools such as OPNET IT GURU and OMNET ++ can be used to simulate various real network solutions to verify the behavior and performance of modern wireless technologies in a laboratory environment. Personally, I like OPNET IT GURU because of its ability to simulate real world wireless products (like the Cisco Aironet series). But OMNET ++ offers more flexibility thanks to its programming interface. The OPNET IT GURU Academic Edition is offered free to students by Opnet Technologies Inc. as part of their academic program. The academic version has all the functionality of OPNET except that it can simulate a maximum of 50 million events, which is more than enough to simulate any network model created for academic research.


Source by Sourabh Kishore

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