Future Trends in Networking


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Future Trends in Networking:

Future Trends in Networking Engr. Taufeeq Liaquat February 03, 2011

Wireless Networking:

Wireless Networking Opens a new arena of networks A transition from wired to wireless Examples: G.C. University, Faisalabad. WIFI in mobiles

Mobile Networking:

Mobile Networking A transition from wireless networks to mobile wireless networks Example The WLAN setup in your University Can move with laptops and WIFI mobiles freely in the corridors

Ad hoc Networks:

Ad hoc Networks A network setup temporarily with a specific purpose Example: A small conference

Mobile Adhoc Networks:

Mobile Adhoc Networks A MOBILE network setup temporarily with a specific purpose. Example: A network setup in a hard-hit area for search and rescue operations. Also termed as MANETs

Components of the IEEE 802.11 Architecture:

Components of the IEEE 802.11 Architecture Basic service set (BSS) Set of stations that can remain in contact with an AP Basic service area (BSA) Coverage area of an AP within which STAs remain in communication If a STA moves out of its BSA, it can no longer directly communicate with other STAs present in the BSA Independent basic service set (IBSSs) STAs communicate directly Often referred to as ad hoc network 6

Extended Service Set (ESS):

Extended Service Set (ESS) An ESS is the union of the BSSs connected by a DS ESS does not include the DS Appears the same to LLC layer as an IBSS network STAs within an ESS may communicate and mobile STAs may move from one BSS to another (within the same ESS) 7

Complete IEEE 802.11 Architecture:

Complete IEEE 802.11 Architecture 8

Components in a Typical IEEE 802.11 Network:

Components in a Typical IEEE 802.11 Network 9

Wireless Network Architecture:

Wireless Network Architecture 10

Wireless Network Architecture:

Wireless Network Architecture Infrastructure based Infrastructure less (Ad hoc LANs) Contains Access Points (APs) which are connected via existing networks AP can interact with wireless nodes as well as with existing wired network Other wireless nodes, known as mobile stations (STAs), communicate via APs APs also act as bridge with other networks Does not need any fixed infrastructure Network can be established on the fly Nodes directly communicate with each other or forward messages through other nodes that are directly accessible 11

Wireless Sensor Networks:

Wireless Sensor Networks An enhancement in ad hoc networks Applications: Animal Studies Surveillance

Bluetooth :

Bluetooth A small ad hoc network Categorized as PAN (due to small range) 1 Master and 7 slaves can communicate with each other Uses FHSS with 79 frequencies Bluetooth Special Interest Group

IEEE Standards to Remember:

IEEE Standards to Remember Ethernet 802.3 Token Ring 802.5 Bluetooth 802.15 Wi-Fi 802.11 WiMAX 802.16

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