Threats to WiMAX

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Threats to WiMAX & its possible enhancements. : Threats to WiMAX & its possible enhancements. By http://www.freewimaxinfo.com Topics to discuss : Topics to discuss Introduction to WiMAX How WiMAX works WiMAX Security Encryption within WiMAX Threats to WiMAX WiMAX Enhancements Future of WiMAX Introduction to WiMAX : Introduction to WiMAX Worldwide Interoperability for Microwave Access, based on IEEE 802.16 standards Higher connection speed than WiFi Wider area coverage, also called MAN (Metropolitan area network) Backhaul for WiFi hotspots Why WiMAX? : Why WiMAX? Higher Data Rates with Orthogonal Frequency Division Multiplexing (OFDM) Timing Supports Wider Range Cost Quality of Service WiMAX Standards : WiMAX Standards 802.16-2004 Used for Fixed & nomadic LOS and NLOS implementations. Supports frequency bands from 3.5 GHz to 5.8 GHz 802.16e Extension of earlier version of 802.16-2004 Supports mobile communication Supports frequency bands from 2.3 GHz to 2.5 GHz ETSI HiperMAN Produced by ETSI for broadband wireless MAN implementations. Supports frequency bands under 11 GHz WiMAX Standards «.Continued : WiMAX Standards «.Continued Wi-Bro Built by the TTA of South Korea Developed to fill the gap between 3G WLAN standards. Supports frequency bands of 2.3 GHz to 2.4 GHz How WiMAX works? : How WiMAX works? WiMAX network consists of Base Station Usually a broadcasting tower Receiver or Subscriber Station Antenna

or Device like AP¶s in WiFi Backhaul Backbone to interconnect base stations & provide roaming facilities.

Types of WiMAX : Types of WiMAX Fixed WiMAX Communicates via wireless links from CPE to remote NLOS base station. Its more secure than Mobile WiMAX Give wireless connection but unable to provide roaming. Mobile WiMAX Uses lower frequency (2GHz to 11GHz) for NLOS connections Gives roaming facility because of handoff between base stations Full & limited mobility features. WiMAX Security : WiMAX Security Robust Security Insures user data piracy & prevents unauthorized access. Additional Protocol optimization for mobility. Security is built-in privacy sub layer within MAC layer. WiMAX Security «.Continued : WiMAX Security «.Continued WiMAX Security Key Functions Support for Privacy Authentication Flexible Key Management Protocol Protection of control messages Support for fast handover Encryption within WiMAX : Encryption within WiMAX Advanced Encryption Standard (AES) is a link layer encryption method to be used in WiMAX. Strong Encryption Fast Easy to Implement in Hardware & Software Efficient Requires less memory than other encryption mechanisms. Encryption within WiMAX«Contd : Encryption within WiMAX«Contd Public Key Infrastructure (PKI) Uses both Symmetric Key Encryption (SKE) & Asymmetric Key Encryption (AKE) Symmetric Key Encryption Not Efficient Problem in generating private keys to hunderd of users. Asymmetric Key Encryption Solution for a Key Distribution problem Used both public & private keys Keys are generated at the same time using RSA algorithm Threats to WiMAX :

Threats to WiMAX Rouge Base Station An attacker station that duplicates a legitimate base station Denial of Service (DOS) Attacks Overload request of signal processing by an attacker. Application Layer Threats Routers & gateways are loopholes the for security threats. Physical Layer Threats Blocking by activating source of strong noise to significantly lowering the capacity of thr channel. Privacy Sub Layer Threat Doesn't ensure complete encryption of user data & also doesn¶t protect the physical layer.

Threats to WiMAX «. Continued : Threats to WiMAX «. Continued Mutual Authentication Lack of base station certificate, therefore it offers replay attacks. Key Management It agains leads to replay attacks by using Traffic Encryption Key (TEK) sequence space. Identity Theft Reprogramming of a device with the hardware address with the help of another device. Water Torture An attacker sends a series of frames to drain out the receiver¶s battery. BlackHat Threats Cracking into the network or the computer system. WiMAX Enhancements : WiMAX Enhancements Orthogonal Frequency Division Multiplexing (OFDM) Provides the operator to beat the challenges of NLOS transmission in the more efficient manner. IMT-Advanced Offers constant higher data rates with high mobility. Power Control Algorithms of power control are applied to enhance the overall performance of the system. Error Detection Techniques Algorithms are used to identify and correct errors to enhance throughput. WiMAX Enhancements «.Contd : WiMAX Enhancements «.Contd Sub Channelization Boosts the system gain that can either be applied to widen the reach of the system. Transmission Diversity Diversity Algorithms are used to enhance the accessibility of the system. Antennas for fixed WiMAX applications Directional antennas enhance the fade margin & increases the link accessibility comparisons between directional and omni-directional antennas. Adaptive Modulation Used to keep the connection quality and link performance.

WiMAX Future : WiMAX Future Its not just the backhaul solution for WiFi. Delivering Additional bandwidth to 3G networks. Delivers converged services that can be accessed using a broad range of devices on a wide variety of networks. Future Threats Experts are expecting similar kinds of threats like WiFi does. Still needs to workout on security issues. The End : The End Any Suggestions please write to us at [email protected] Contribute to our site and help us grow the wireless technology. For contributions on news and articles please contact at [email protected]
A Presentation on WIMAX P.Ramya Sruthi II/IV CSE 08AH1A0569 K.Harisha II/IV CSE 08AH1A0539 Slide 2: CONTENTS 1. Background for broadband wireless technologies 2. What is WiMAX? 3.Architecture of wimax 4.Features of wimax 5.Types of system processed 6.Applications 7.Conclusion Slide 3: Optical Fiber¢ wi fi ^ | | | | Cables --¢Before WIMAX ^ | | Infared--Slide 4: 2. What is WiMAX? -The wimax means world wide Interoperatbilityformicrowave ascess It recently approved by IEEE802.16wireless metropolitain area network _WiMAX offers fast broadband connections over long distances. . _ Slide 5: This is architectureof wimax Features of WIMAX: : Features of WIMAX: Flexible Architecture. High security Multi level survice Portability Mobility Cost effective Wider coverage High capacity Interoperability Slide 7: The System is processed -P2P -P2MP Applications of WIMAX : cellular backhaul Education networks Banking networks Public safty Rural &urban Connectivity Solutions Interactive gaming Vedio conferences Streaming media Applications of WIMAX

Slide 9: Usage in vedio conferences Slide 10: CONCLUSION IN FUTURE SPANE OF TIME WIMAX WILL BE THE DOMINENT TECH FOR WIRELESS TRANSMISSION THANK QALL : THANK QALL Slide 12: ANY QUARIES Wi-Max & Wi-MAX Presented & performed by : Presented & performed by Arunachalam PL COMPUTER ENGINEERING Slide 3: Introduction Wireless Communication Infrastructure Of Wimax Wimax Vs Wi-fi Mobile Wimax Salient Features Wimax technology Bibliography Concluding remarks Agenda Wireless Fidelity (Wi-Fi)Welcome to the World of Wireless : Wireless Fidelity (Wi-Fi)Welcome to the World of Wireless A radio technology that networks the devices. Refers to wireless LAN products based on the IEEE 802.11b specification Provides easy connections to the internet and business networks while traveling The main attractive feature of this technology is that it can provide wireless broadband connection within a specific geographic boundary. Slide 5: Infrastructure Mode AD HOC Mode OPERATING MODES Slide 6: There are many WiFi hotspots now available in public places like restaurants, hotels, libraries and airports. For example, Spenzer PLAZA The number of hotspots in the world is growing daily. LOCATING HOTSPOTS Slide 7: Introduction It is one of the most promising broadband wireless access technology for next generation all-IP networks. The 802.16 family of standards is officially called Wireless MAN, it has been dubbed ³WiMAX´ form World wide Interoperability for Microwave Access. Slide 8:

Provide high-speed Internet access to home and business subscribers, without wires. 10-66 GHz and sub 11 GHz Legacy voice systems Voice over IP TCP/IP Applications with different QoS requirements goals Slide 9: WiMAX is targeted for longer range Metropolitan Area (indoor & outdoor) Different from Wi-Fi, which is primarily targeted for Local Area Network (indoor) applications. The main distinction between WiFi and WiMAX is speed and coverage distances: WiFi has a typical bandwidth of 2MBps whereas WiMAX can have a bandwidth of up to 75MBps. The coverage distances also differ to a great extent. A WiFi hotspot typically covers a few hundred feet radius (fraction of a kilometer) whereas a WiMAX can practically cover up to a distance of 10 kilometers. Wimax vs wi-fi Slide 10: LOS- Line Of Sight NLOS- Non Line Of Sight Wireless communication Slide 11: Orthogonal frequency division multiplexing is a technology based on multicarrier modulation. OFDM possesses multiple carriers which are mutually orthogonal. Theses subcarriers are closely placed to each other on the frequency domain, & each sub carrier is modulated & demodulated separately. ofdm Slide 12: WiMAX works as point to multipoint system, which is made up of base station and subscriber equipment How it works Slide 13: The increased demand on multimedia services let to the need for BWA (Broadband Wireless Access) This let to the appearance of WiMAX technology Advantages of BWA: Fast connection (several Mbps/user) Relatively cheap (no cable infrastructure) Not limited by location (wireless links) Broadband wireless accesses(bwa) Slide 14: Wimax Infrastructure A WIMAX tower: similar in concept to a cell-phone tower. A single WIMAX tower can provide coverage to a very large area (~10 km). Slide 15: A WIMAX receiver : The receiver and antenna could be a small box or PCMCIA card, or could be built into a laptop. NEC Japan has announced its new and compact WiMAX router with embedded wireless LAN, it is dubbed the NEC WiMax Router Any wireless node within the coverage area would be able to access the Internet Wimax routers/base stations Slide 16: There are two versions: Indoor SU. Outdoor SU. Indoor units are comparable in size to a cable modem or DSL modem. Outdoor units are roughly the size of a laptop PC, and their installation is comparable to a residential satellite dish. There is an

increasing focus on portable units including handsets and PC peripherals. Outdoor subscriber unit Indoor subscriber unit Subscriber units Slide 17: WiMAX Broadband Applications WiMAX VoIP Broadband Data Connections Digital Television Urban WiMAX Hot Zones Surveillance Services applications of wimax Slide 18: WiMAX becomes a strong candidate for future mobile networks Triple play¢ Video services Integrated network: Data, Voice and Video Mobility ¢ Voice services Appearance of IPTV made it possible for TV over WiMAX ¢Appearance of VoIP made it possible for Voice over WiMAX Slide 19: Wimax gadgets The below shown gadgets are the latest using WiMAX technology Slide 20: WiMAX, LTE, MESHWireless Network Doctors at the emergency room can see the vehicle and get an understanding of the mechanism of injury to guide their treatment of the victim. Portable or fixed mounted cameras can be used to capture video or still images of a vehicle accident to send to emergency room doctors. Enables real time monitoring of Patients on the way to the Hospitals Vehicle accident Slide 21: WiMAX, LTE, MESH Wireless Network Doctors at the emergency room can help guide treatment of the victim, especially important for time critical treatment. Cameras inside ambulances can capture video of patients to send to emergency room doctors for consultation. Remote diagnosis can shorten the time before treatment which can potentially save lives and shorten recovery time Remote medical diagnosis Slide 22: Mobile Wimax salient features Slide 23: General packet Radio Services Enhanced Data Rates for GSM Evolution Evolution Data optimized (Only) Wimax speed Slide 24: Security« EAP authentication Key Binding Device and User authentication capability Slide 25: Conclusion Slide 26:

Wi-Fi & Wi-Max is an alternative to cable and DSL for last-mile broadband access Developing countries Rural areas Provide high-speed mobile data and telecommunications services using WiMAX. Let us conclude« Slide 27: ³A journey of a thousand sites begins with a single click Full effort is full victory .´ Its time for small Demo This Paper has been submitted under the guidance of : This Paper has been submitted under the guidance of Over headed by Mr.M. Saravanan (M.E) ± Senior Lecturer (Computer Engg). K. Megala B.E ± Lecturer (Computer Engg). MR.D.ARUL SELVAN M.E., Head Of the Department / Computer Engineering Mr.M. Ramesh Kumar, MCA.,Mphil ± HOD i/c (Computer Engg). Slide 29: WiMAX IEEE WiMAX Magazine Intelligent Environment http://www.media.mit.edu/ http://cooltown.hp.com/ http://portolano.cs.washington.edu/ http://www.firstmonday.dk/issues/issue4_9/odlyzko/ Wearable Computers http://www.redwoodhouse.com/wearable/ http://iswc.gatech.edu/archives.htm Wireless communications http://www.wirelessdevnet.com/ Bibliography Slide 30: Thank You very much«.. Create Knowledge Structure Knowledge Disseminate Knowledge Apply Knowledge Assimilate Knowledge Seminar - Knowledge Sharing And Acquiring Environment Apply Knowledge Assimilate Knowledge Disseminate Knowledge Apply Knowledge Assimilate Knowledge Structure Knowledge Disseminate Knowledge Apply Knowledge Assimilate Knowledge Create Knowledge Structure Knowledge Disseminate Knowledge Apply Knowledge Assimilate Knowledge Slide 31: Thank You 2 WiMAX Worldwide Interoperability for Microwave Access Brand licensed by the WiMax Forum. ³a standards-based technology enabling the delivery of last mile wireless broadband access as an alternative to cable and DSL´ WiMAX was seen as more of a Metropolitan Area Network (MAN) technology providing a much larger coverage. Based on IEEE 802.16 WiMAX : 3 WiMAX WiMAX, in fact, comes in two forms, a so called µfixed WiMAX¶ and a µmobile WiMAX¶. WiMAX in its fixed form is seen as a possible alternative to expensive cable and fibre deployment. It is faster to deploy and less expensive and it also offers operators more flexibility in terms of deployment time frame and possible installation areas. 3G or other cellular network operators could see this as a potential substitute or as a complement to their cellular product.

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