Independent Basis Service Set or IBSS Essay Example for Free

Independent Basis Service Set or IBSS Essay Independent Basis Service Set or IBSS is the most basic wireless local area network topology. Sometimes IBSS is also called an Ad Hoc Network. The IBSS is a form of WLAN network topology wherein the set of stations are being recognized by each of the stations. They are connected by the use of a wireless media in a fashion of peer-to-peer. In an Independent Basis Service Set topology, there is a direct communication between the mobile stations. There is a limitation in the communication between a mobile station to the each and other mobile stations because of the limitations in range. Relay functions are not present in an IBSS topology, so all the mobile stations that are connected should be within the range to be able to communicate properly (FallsConnect. com, 2007). Another Wireless LAN topology is the Infrastructure Basic Service Set. The component of the IBSS is termed as an access point (AP). The role of the access point in the Infrastructure BSS is to supply relay functions for the entire basic service set. Communication in the entire BSS is already done in the local points and direct communication is longer occurring. Relay of frames are done by the access points between the mobile stations. The relay function of the access point is effective and efficient in doubling the rage of the Infrastructure Basic Server Set. The access point of the Infrastructure Basic Service Set is also able to offer a bond or a connection that will be linked to the delivery system. The distribution system is also considered as the strength of character of the wireless local area network. The distribution system is the one which provides communication in an access point with other access points. The communication goals are to replace frames for the stations in their basic server set, to promote frames to pursue mobile stations as they move from one basic server set to another basic server set. Swapping over of frames to with a wired network is also a goal of the communication in the distribution system (FallsConnect. com, 2007). IEEE 802. 11 gave distribution system a definition that it may either be wired network similar to the 803. 2 or a special point box wherein interconnection of the access points and supply of required distribution services is given. There is a creation of an extension of the mobility range to an arbitrary range. And this is made possible by the 802. 11 by using the Extended Service Set. Extended Service Set is a set of communication for the basic server set. This is where the access points are able to communicate within themselves. Facilitation of movement from a station to the other station of the basic server set is the goal of the access points’ communication with other access points (US Robotics, 2007). The determination of a traffic done that was forwarded to the basic server set is being identified by the distribution system. The determination and evaluation of the traffic if it should be communicated back to the destination where it came from or if the traffic should be promoted to other access points are some of the roles of the distribution system. Access points have been able to transmit communication to the mobile station. This communication was made possible by the use of distribution system. The communication transmitted will be received immediately by the mobile station. The single MAC Layer is composed of the extended set server. Another composition of the MAC layer network are the mobile stations outside the extended server set. In the single MAC Layer network, all of the work stations are immobile. Network equipments outside the extended server set is not allowed to have mobility unless they are inside the extended server set. These kinds of indirection equipped with the 182. 11 architecture permits other network protocol outside the extended server set to operate properly in the wireless local area network where mobility is available and present (US Robotics, 2007). The data link layer of the Ethernet Local Area Network system was derived from the Medium Access Control protocol. The Media Access Control protocol is the one which summarizes a SDU. Carrier-Sense Multiple Access with Collision Avoidance is the shared wireless media. This is where the MAC Layer offers controlled access. It is commonly like the impact detection access method of the 802. 3 Ethernet Local Area Network. The summary is started with the addition of a 14 byte header before the data and after the data there will also be an addition of a 4 byte (32 bit). The 14 byte header is the Protocol Control Information while the 4 byte is the Cyclic Redundancy Check. Reliable data delivery for the upper layers is being provided by the IEEE 182. 11 MAC Layer. 802. 11 MAC Layer provides security and privacy services to the delivery of the data. Services like authentications offer security together Wireless Equivalent Privacy. The Wireless Equivalent Privacy is the data delivery encryption service for the wireless local area network.