IrDA IrLAP protocol performance and optimum link layer parameters for maximum throughput
نویسندگان
چکیده
Infrared ports are employed in a wide variety of devices ranging from personal computers and printers to mobile phones. Infrared connectivity complies to specifications defined by Infrared Data Association (IrDA). The performance of IrDA links may be measured at the IrLAP data link layer, which controls the IrDA hardware. A simple equation to calculate throughput from different link parameters is derived by calculating the average window transmission time. Throughput analysis results are presented that reveal the significance of link layer parameters, such as window and frame size, and physical layer parameters, such as minimum turn around time. Simple equations for the optimum values for window size and/or frame length are derived by differentiating the throughput equation. These values maximise throughput performance for different BER values. Simulation results indicate that optimum window and frame size implementation results in significant throughput increase even for high BER.
منابع مشابه
Optimization of IrDA IrLAP link access protocol
The widespread installation of millions of Infrared Data Association (IrDA) infrared (IR) ports in mobile devices for wireless communication applications necessitates for throughput performance optimization of the IR links at the IrDA link access protocol (IrLAP) link layer. For IrDA connectivity, link-layer throughput optimization is important for any line bit-error rate (BER). The paper provi...
متن کاملModelling and Optimising TinyTP over IrDA Stacks
TinyTP is the IrDA transport layer protocol for indoor infrared communications. For the first time, this paper presents a mathematical model for TinyTP over the IrDA protocol stacks taking into account the presence of bit errors. Based on this model, we carry out a comprehensive optimisation study to improve system performance at the transport layer. Four major parameters are optimised for maxi...
متن کاملThroughput Analysis of the IrDA IrLAP Optical Wireless Link Access Protocol
A performance analysis of the optical wireless IrDA data link layer access protocol (IrLAP) is presented. Three different mathematical approaches are presented to model the throughput of the IrDA IrLAP protocol. All methods are leading to the same simple equation for the throughput at this layer. The analyses are based on evaluation of window transmission time, probability of correct frame tran...
متن کاملPerformance modelling of the IrDA infrared wireless communications protocol
We present a performance analysis of the Infrared Data Association (IrDA) IR data communications protocol using a mathematical throughput model based on the virtual transmission time of uni-directional IrDA data packets. The IrDA standard speci"es a protocol stack for reliable short-range indoor IR wireless data communication between devices with the data link layer (IrLAP) being a HDLC derivat...
متن کاملModeling IrDA performance: the effect of IrLAP negotiation parameters on throughput
The Infrared Data Association’s (IrDA) infrared data transmission protocol is a widely used mechanism for short-range wireless data communications. In order to provide flexibility for connections between devices of potentially disparate capabilities, IrDA devices negotiate the values of several transmission parameters based on the capabilities of the devices establishing the connection. This pa...
متن کامل