Abstract
This letter investigates the throughput performance of the IEEE 802.11 DCF protocol in unsaturated traffic conditions, taking into account the signal capture with incoherent addition of interfering signals, and channel fading following the η-μ model. A set of numerical results on the performance of the protocol is presented. The results show the adjustment flexibility of the proposed channel model and establishes the parameter μ as the one responsible for the coarse adjustment of the channel, while the parameter η defines the fine adjustment.
Highlights
T HE most successful existing commercial implementation of a Wireless Local Area Networks (WLAN) is specified by the IEEE 802.11 standards, which in recent years has grown considerably, making it essential for the connectivity of mobile users
The IEEE 802.11 protocol defines the procedures and services required from the stations, ensuring that all stations have access to the shared medium through the Medium Access Control (MAC) and Physical Layer (PHY) functions [1]
The main objective of the DFC, which is based on the Carrier Sense Multiple Access with Collision Avoidance (CSMA/CA) scheme, is to perform the data transfer between stations with reduced number of collision or even avoiding them altogether, when the stations are contending for access to the shared medium
Summary
T HE most successful existing commercial implementation of a Wireless Local Area Networks (WLAN) is specified by the IEEE 802.11 standards, which in recent years has grown considerably, making it essential for the connectivity of mobile users. The analytical model proposed by Bianchi [2] is a precursor; it uses a Markov modeling of the DCF mode and objectively it can be used to evaluate the saturated throughput for both packet transmission techniques, i.e., 2-way handshake, known as Basic Access, and 4-way handshake, known as Request-toSend/Clear-to-Send (RTS/CTS) access mechanism. For this modeling, it is assumed a finite number of stations, ideal.
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