THE INTERNATIONAL JOURNAL OF ENGINEERING AND INFORMATION TECHNOLOGY (IJEIT), VOL. 2, NO. 2, JUNE 2016 40 Evaluation Study Li-Fi Vs Wi-Fie Abdullah Tagalser Mohammed Al- Neelain University/ Khartoumt, Sudan [email protected] Abstract— broadband Is a wireless broadband access Table 1. Comparison Between Li-Fi And Wi-Fi. networks to be enterprise-wide networks provide us with more capacity as well as coverage. Up to areas that are Parameters Li-Fi Wi-Fi difficult to remote access all cost-effective. Our wireless networks has provided an alternative solution to the problem of access to information. It has certainly changed the way people communicate and exchange information IEEE standard 802.15.7 802.11b among themselves by overcoming problems associated with at the present time with the distance and location. This paper provides a comparison of alternatives for the Frequency Band 100 times of Tera 2.4 GHz implementation of last mile wireless broadband services. It Hz provides detailed differences between the 802.11 (Wi-Fi) wireless networking with 802.15 (FI me), a new technology Cost Cheaper Expensive that solves a lot of difficulties in the implementation of last mile . Data Transfer Light radio spectrum Medium Index Terms: Li-Fi, WI-Fi, VLC, LED, (Light emitted diode). Network Topology Point-to-point Point-to- point Spectrum range visible light Radio spectrum range I. INTRODUCTION our Li-Fi is a wireless optical networking Range 10 meters 20-100 meters Y technology that uses light-emitting diodes (LEDs) Speed 1-3.5 Gbps 54-250 Mbps for data transmission. Li-Fi is designed to use LED light bulbs similar to Security High Medium those currently in use in many energy-conscious homes Power energy Available Less available and offices. However Li-Fi bulbs are outfitted with a chip that modulates the light imperceptibly for optical data transmission. Li-Fi data is transmitted by the LED bulbs and received by photoreceptors. Li-Fi is a framework for all of these providing new capabilities to current and III. Wi-Fi TROOBLE future services, applications and end users. This brilliant The twin performance of signals is a main problem of idea works very simple, if the LED is on, you transmit Wi-Fi for radio signal is not so powerful. numeral of digital 1; if it’s off you transmit a 0. The LEDs can be channels. So we need a new technology which is switched on and off very quickly, which gives nice fulfilling the requirement of users . opportunities for transmitting data. Li-Fi is the term some . have used to label the fast and cheap wireless communication system, which is the optical version of IV. PROBLEMS OF WI-FI Wi-Fi. Li-Fi uses visible light instead of Gigahertz radio Data Rate – Wi-Fi network is costly in comparison waves for data transfer. wired network to implement. Wi-Fi has a limit to transfer the data rate. It is cannot send a huge amount of data in compared to wired network and data transmission rate is II. COMPARISON BETWEEN Li-Fi AND Wi-Fi influenced by the network where the electromagnetic Li-Fi is describing visible light communication radiation generated. technology applied to obtain high speed wireless Wi-Fi routers also generate radiation which is effects communication. It derived this name by virtue of the on human health. similarity to Wi-Fi. Wi-Fi works well for general wireless • Speed – Theoretically the speed of 802.11 ac or an coverage within buildings, and Li-Fi is ideal for high Ethernet.is 1 gigabit per second but the maximum density wireless data coverage inside a confined area or speed of 802.11 n standard support maximum 600 mbps. room and for relieving radio interference issues. But in real word application wireless network is slow than wired network. The problem becomes more acute if you have a busy network or signal is weak. Received 15 September 2015; revised 17 September 2015; accepted • Reliability – Wireless networking uses radios to 21 September 2015. Available online 5 September 2015. transmitnet working signals using satellite. Wireless networks have. a limited number of channels and, if www.ijeit.misuratau.edu.ly ISSN 2410-4256 Paper ID: IT004 41 Abdullah Tagalser Mohammed / Evaluation Study Li-Fi Vs Wi-Fie every channel is full, connections will slow down or fail VI. ENFORCEMEN To Li-Fi to work. • Security – Wi-Fi Protected Access security protocol Table 2. Enforcement To LI-FI. [7] is better than nothing, it can still be cracked by a 1 Very high speed transfer rate – Li-Fi is use light as signal to dedicated hacker. [7] transfer data as it has more data transfer speed in comparison of wi- fi. It has 500 Mbps or 30 gb per minute. V. ENVIRONMENT Li-Fi AND Wi-Fi 2 Aircraft – Li-Fi provides an internet connection in airplane because it is use a VLC to transmission of data instead of radio waves because in airplane radio wave is not used. 3 A Hospital - Wi-Fi use radio signal to transfer data its use electromagnet signals which is effects on human health. Wi-Fi routers generate radiation which is effects on human health and cannot use Wi-Fi in hospital. But in Li-Fi use a light source to communicate and LED to transfer to data. 4 Under water – LED provide an internet facility in under water but Wi-Fi is completely fails at this point. 5 Cheaper than Wi-Fi – Li-Fi is cheaper than Wi-Fi because its use a LED light to transfer data. 6 Military – this technology is more useful to military because radio signal is not available at everywhere. VII. BENEFITS OF Li-Fi Figure1. Li-Fi Capacity: Visible light spectrum is 10000 times bigger than RF spectrum. It is predicted that will we run out of the RF spectrum by 2020. Security: Light cannot penetrate walls, but radio waves can, thus security is higher in using Li-Fi. Efficiency: The 1 million radio masts base stations consume a lot of energy, which indeed is used to cool the base stations and not to transmit radio waves. These base stations have poor efficiency upto only 5%.Whereas Li-Fi uses the 2.4 billion led lamps which offers a much higher efficiency. Transmission of data: Wi-Fi transmits data serially and Li-Fi transmits thousands of data streams parallely thus offering higher speed. Infrastructure: It is already existing. Inexpensive devices, mostly powered by LED, so it is cost effective, compared to base. [8]. Figure 2. Wi-Fi VIII. DEBATE After review both technology, we found the best technology is Li-Fi. There are some reasons are mainlined below: 1. A free band that does not need license 2. No more monthly broadband bills. 3. Wi-Fi is very costly than Li-Fi. Figure 2. Diagram Infinitive And Run LiFIi 4. Lower electricity costs. 5. High installment cost but very low maintenance cost: Longevity of LED bulb: saves money . 6. Theoretical speed up to 1 GB per second: Less time and energy consumption. 7. Light doesn’t penetrate through walls: secured access. 8. Reliability, Flexibility, is much better of Li-Fi. www.ijeit.misuratau.edu.ly ISSN 2410-4256 Paper ID: IT004 THE INTERNATIONAL JOURNAL OF ENGINEERING AND INFORMATION TECHNOLOGY (IJEIT), VOL. 2, NO. 2, JUNE 2016 42 IX. SOME RESULT OF THE DESIGN AND THE PATH Figure 3. Li-Fi Working Environment Figure 5. Block Diagram For LED Figure 4.Working Of LI-FI X . CHALLENGES TO LI-FI One of these challenges works in direct line of sight. challenge last is how the receiving device will transmit to the transmitting device. Figure 6. Transmission Of Data Using White One cannot shift the receiving device in case of indoor arrangement of the apparatus as light cannot penetrate through walls and is easily blocked by somebody simply walking in front of LED source. XI. CONCLUSION We have already discussed the two technologies here now we will recall a brief overview of this paper. Li-Fi is solving issues such as shortage of radio frequency bandwidth and also allows the internet where the traditional radio based wireless isn’t allowed such aircraft and hospitals and Internet anywhere. REFERENCES [1] Vitthal S Saptasagare ,Next of Wi-Fi an Future Technology in Wireless Networking Li-Fi Using Led Over Internet of Things, International Journal of Emerging Research in Management &Technology(2014). [2] Akshit Aggarwal, OMPARATIVE STUDY: LI-FIV/SWI-FI, International Journal of Research & Development in Technology and Management Science–Kailash(2014). U. Duncombe, ―Infrared www.ijeit.misuratau.edu.ly ISSN 2410-4256 Paper ID: IT004 43 Abdullah Tagalser Mohammed / Evaluation Study Li-Fi Vs Wi-Fie navigation—Part I: An assessment of feasibility,‖ IEEE Trans. [7] A Comparative Study of Wireless Future Wireless Electron Devices, vol. ED-11, pp. 34-39, Jan. 1959. [8] Communication (Wi-Fi) (Light Fidelity) General presentation. [3] Swati Singh, Prof. (Dr.) Y.P , LI FI- A NEW PARADIGM, [9] LiFiLight Fidelity (LI-FI) - The Future of Visible Light International Journal of Advanced Research in Computer Science and Software Engineering(2014). Y. Lin, M. Wu, J. A. Bloom, I. J. Cox, and M. Miller, ―Rotation, scale, and translation resilient BIOGRAPHIES public watermarking for images,‖ IEEE Trans. Image Process., Abdallah Tagalser Mohammed was born in AL KAMLIN /Sudan , on vol. 10, no. 5, pp. 767-782, May 2001. May 1, 1987. He received Bsc degree in Electronics Engineering [4] Rahul R. Sharma1, Raunak2, Akshay Sanganal, ‖Li-Fi (Communications) from Al Manhal Academy of Science, in 2012. And Technology Transmission of data through light‖, Int.