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Transcript of wimax Prezi
WIMAX WiMAX is a growing technology with the following key features WiMAX (Worldwide Interoperability for Microwave Access) is a wireless communications standard designed to provide 30 to 40 megabit-per-second data rates,
The 2011 update providing up to 1 Gbit/s for fixed stations.
The name "WiMAX" was created by the WiMAX Forum, which was formed in June 2001 to promote conformity and interoperability of the standard.
The forum describes WiMAX as "a standards-based technology enabling the delivery of last mile wireless broadband access as an alternative to cable and DSL Introduction to the technology The IEEE 802.16/WiMAX standard promises to revolutionize wireless delivery of broadband services
an alternative to DSL and cable modems
backhaul for access points and base stations
long-range connections for private networks
Now is a good time for wireless professionals to become familiar with WiMAX wireless technology
With standards, development, and certification well advanced, the next major challenge is deployment. • What is WiMAX (IEEE 802.16)?
– a wide area alternative to IEEE 802.11/WiFi?
– a threat to cellular telephony (voice and data)?
– a method for breaking wireline monopolies?
– a method for providing backhaul to IEEE 802.11/WiFi access points?
– a single standard or a family of standards?
– a universal solution for broadband wireless access? key features u should know Data Rate vs Mobility
It has improved spectrum efficiency around two times more than current 3G technologies.
Enables a wide range of advanced antenna systems including MIMO, space-time coding and spatial multiplexing. It thus increases the covering range of WiMAX .
WiMAX spectrum is more economical than 3G.
Lower Latency. The fastest Wi-Fi connection can transmit up to 54 megabits per second under optimal conditions. WiMAX should be able to handle up to 70 megabits per second.
WiMAX outdistances Wi-Fi by miles. Wi-Fi's range is about 100 feet (30 m). WiMAX will blanket a radius of 30 miles (50 km) with wireless access. The increased range is due to the frequencies used and the power of the transmitter .
The original WiMAX standard (IEEE 802.16) proposes the usage of 10-66 GHz frequency spectrum for the WiMAX transmission, which is well above the Wi-Fi range (up to 5 GHz maximum).
WiMAX specifications also provides much better facilities than Wi-Fi, providing higher bandwidth and high data security by the use of enhanced encryption schemes.
WiMAX can also provide service in both Line of Sight (LOS) and Non-Line of Sight (NLOS) locations, but the range will vary accordingly. Long range
multi-functionality within WiMAX
Infrastructure Key features of 802.16e Mobile WiMAX physical layer is based on Scalable OFDMA technology.
The new technologies employed for Mobile WiMAX result in lower equipment complexity and simpler mobility management due to the all-IP core network and provide Mobile WiMAX systems with many other advantages over CDMA-based 3G systems Key features of 802.16e Use microwave for the wireless transfer of data.
Specifies a frequency band in the range between 2 GHz to 66 GHz.
For high speed wireless networking.
Wimax is a wireless internet service that is capable of covering a wide geographical area by serving hundreds of users at a very low cost.
It includes TDD and FDD duplexing support.
Flexible channel sizes (3.5 MHz,5 MHz,10MHz)
An easy and fast system to install.
Leading to low installation cost, when compared to fiber ,cable or DSL deployments. handoff When FBSS is supported
Transition between Anchor BSs is carried out without any HO signalling
Begins with a decision by an MS to receive or transmit data from the Anchor BS that may change within the active set.
Important requirement of FBSS is that the data is simultaneously transmitted to all members of an active set of BSs that are able to serve the MS. Handoff When MDHO is supported
MS and BS maintain an active set of BSs that are involved in MDHO with the MS.
An Ancho rBS is defined
MS communicate swith all BSs in the active set of up link and down link unicast messages and traffic
Begins when a MS decides to transmit or receive unicast messages and traffic from multiple BSs in the same time interval why WiMAX over 3G why WiMAX over Wifi advantages of WiMAX Disadvantages of wimax WiMAX is basically a power sensitive technology, meaning that it heavily relies on strong electrical support.
A Line of sight is required in order to make a wireless data communication connection extending over 6 miles or more. Means it is needed for more distant connections.
Bandwidth is shared among users in a given radio sector. If there are many users in one sector, they will have lower speed.
Bad weather conditions such as rain could interrupt the signal.
Other wireless equipment could cause interference.
WiMAX is a very power-consuming Aplications Broadband Internet access real time applications
VoIP, Video on Demand
Surveillance and monitoring (forests, volcano, etc.)
Other possible real time complex applications
General applications and services based on IP connectivity. Figure shows the applications of WiMAX to provide Internet access over big geographical area This is crucial for telemedicine services. Patient information must be communicated in a secure and reliable manner. The MAC layer security feature in the IEEE 802.16/WiMAX standard can provide access control and encryption functionalities for wireless telemedicine services. The future of WiMAX Along with the forthcoming standardization, WiMAX has the potential to substitute 3G and become a promising 4G.
WiMax is a technology which considered as the first step toward 4G. Today WiMax is operating as second generation and third generation technology but in near future it would be substantial 4G technology.
It is expected that WiMax becomes the dominant standard for Wireless MAN in the world market, at least, in fixed broadband networks.
WiMAX networks can provide very-high-speed wireless connectivity in presence of mobility. THANK U FOR UR ATTENTION! Handoff Mobile WiMAX supports three handoff methods
Hard Handoff, HHO (mandatory)
Fast Base Station Switching, FBSS (optional)
Macro Diversity Handover, MDHO (optional)
When FBSS is supported
MS and BS keep up a list of BSs that are involved in FBSS with the MS Active set
MS defines an Anchor BS and communicates only with it. Power Management Sleep Mode
MS conducts pre-negotiated periods of absence from the Serving Base Station (SBS) air interface. These periods are interpreted as unavailability of the MS to SBS concerning DL or UL traffic.
Sleep Mode minimize MS power usage and the usage of SBS’s air interface resources
Handoffs between Base Stations are available during Sleep Mode mobile wimax 802.16e PowerManagement Two modes to manage efficient power operation
provides a mechanism for the MS to become periodically available
remove the requirement for handoff and other normal operations
eliminate air interface and network handoff traffic from essentially inactive MSs Mobility Management Power management and handoff are two important issues for mobile applications.
Mobile WiMAX supports Sleep Mode and Idle Mode.
Mobile WiMAX also supports seamless handoff to enable the Mobile Station(MS) to switch from one base station to another at vehicular speeds without interrupting the connection. wimax standerds IEEE 802.16e (2005)
MAC/PHY Enhancements to support subscribers moving at vehicular speeds. 802.16e
(Dec 2005) IEEE 802.16d (Oct 2004)
Combines both IEEE 802.16 and 802.16a
Some modifications to the MAC and PHY 802.16d (802.16-2004)
(Oct 2004) IEEE 802.16c (2002)
Represents a 10 to 66 GHz system profile that standardizes more details of the technology. 802.16c
(2002) IEEE 802.16 (2001)
Original fixed wireless broadband air Interface for
10 – 66 GHz.
Connection-oriented, TDM/TDMA MAC
Targeted for Line-of-sight only
Point-to-Multi-Point applications 802.16
(Dec 2001) IEEE 802.16a (January 2003)
Extension for 2-11 GHz
Targeted for non-line-of-sight,
Point-to-Multi-Point applications “LAST MILE” broadband access. 802.16a
(Jan 2003) 802.16 Standards History presentation by,
03 pravin gupta
14 Prasad Dhuri
16 Ritesh Dube
17 Shailesh Dudhal
18 Amar Gadi
35 Arpit Kabra created by