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RUNNING HEAD: LAN AND WAN




[Name of the Student]
[Name of the Institution]
[Name of the professor]
LAN AND WAN
Local area network
Hardware software
Introduction
A significant evolution in wireless office and home LAN networks creates new opportunities for developing new products in this area providing inherent flexibility and mobility advantages. The introduction of specialised standards, such as the ETSI BRAN HIPERLAN=2 and the IEEE 802.11a, has opened the road to new products in this area. It has been estimated that more than 61 million wireless products will be shipped by 2006. (Brady, J., Monk, E. & Wagner, B. 2001, 11-45)
Both aforementioned standards operate in the 5 GHz band, and both utilise orthogonal frequency division multiplexing (OFDM) for multicarrier transmission. (Brady, J., Monk, E. & Wagner, B. 2001, 11-45) The HIPERLAN=2 standard features many physical layer data rates, with a maximum of up to 54 Mbps, using a combination of modulation schemes and coding factors. Furthermore, it supports advanced quality of service (QoS). Features for streaming audio and video services [6].
The QoS features are provided by the medium access control
(MAC) layer of the protocol, through a central resource control scheme, which controls the link capability among access point and mobile terminals according to interference situations and distance. (Brady, J., Monk, E. & Wagner, B. 2001, 11-45)

Hardware–software mapping and communication
An important task during the design of the modem is the mapping of its processes to the used instruction-set Processors, i.e. software implemented processes, and to custom hardware, i.e. hardware implemented processes, as Well as the determination of the interface of the processes Implemented in the software with those implemented in the
Hardware. (Brady, J., Monk, E. & Wagner, B. 2001,...