Extending PROFIBUS segments through IEEE 802.11 wireless LAN

IEEE 802.11 Wireless LAN

In this case study we consider model-checking of some properties for IEEE 802.11 Wireless LAN [1]. Since stations in wireless LANs are not able to listen to their own transmission they cannot employ Carrier Sense Multiple Access with Collision Detection (CSMA/CD) as already investigated in one of our other case studies. Hence, other techniques need to be used to handle collisions. The IEEE 802....

Qos Support for Ieee 802.11 Wireless Lan∗

In today’s Internet, the emerging widespread use of real-time voice, audio, and video applications makes Quality of service (QoS) a key problem. Meanwhile, the Internet is getting heterogeneous due to the explosive evolution of wireless networks. QoS support in wireless networks is more challenging than in the wired networks since bandwidth is scarce, latency and bit error rate are high and cha...

IEEE 802.11s Wireless LAN Mesh Network Technology

Optimization of IEEE 802.11 Multirate Wireless LAN

IEEE 802.11 standards support multiple data transmission rates with dynamic rate switching capability to improve the performance. With multirate enhancement, data transmission from wireless LAN (WLAN) stations can take place at various rates according to channel conditions. This paper investigates the problem of optimizing aggregate saturation throughput of a multirate WLAN. Analytical expressi...

Performance Modelling of IEEE 802.11g Wireless LAN

Fairness of wireless channel access in terms of utilisation and throughput is studied for IEEE 802.11g by using the process algebra PEPA. Three models are presented to describe different operating scenarios. Results are derived which demonstrate when and how unfairness might occur, leading to the penalisation of some nodes in a network.