Abstract— The IEEE 802.15.4a Task Group recently proposed Impulse Radio Ultra Wide Band (IR-UWB) for a physical layer that can provide combined communication and ranging in low data rate indoor/outdoor networks. At present, it is therefore particularly relevant to design IEEE 802.15.4a MAC strategies that are appropriately tailored on the physical layer. In previous work, we proposed an UWB-tailored MAC named Uncoordinated Baseborn Wireless medium access control for UWB networks (UWB)2 that adopted the Aloha principle, based on the low probability of pulse collision for low data rate communications, and enabled location-based network optimization by providing and storing estimates of distance between nodes. This paper first revisits the (UWB)2 MAC protocol in view of its application to IEEE 802.15.4a. The structure of both control and data MAC protocol data units is defined based on the legacy 802.15.4 MAC, in order to allow a seamless support, for both centralized and distributed network topologies, as defined in the parent standard. Secondly, this work extends and completes the analysis of (UWB)2 since it takes into account multipath-prone channels. Channel parameters, for both indoor and outdoor propagation scenarios in Line Of Sight (LOS) and Non-Line Of Sight (NLOS) conditions, were derived from the channel model defined within the 802.15.4a channel sub-committee. Results highlight that the (UWB)2 protocol is robust to multipath, and provides high throughput and low delay, with performance scaling gracefully as a function of number of users and user bit rate. Results confirm and support the adoption of (UWB)2 principles for low data rate UWB communications.

The Aloha access (UWB)^2 protocol revisited for IEEE 802.15.4a / DI BENEDETTO, Maria Gabriella; DE NARDIS, Luca; G., Giancola; Domenicali, Daniele. - In: ST JOURNAL. - ISSN 1828-2105. - Vol. 4, No. 1:(2007), pp. 131-142.

The Aloha access (UWB)^2 protocol revisited for IEEE 802.15.4a

DI BENEDETTO, Maria Gabriella;DE NARDIS, LUCA;DOMENICALI, Daniele
2007

Abstract

Abstract— The IEEE 802.15.4a Task Group recently proposed Impulse Radio Ultra Wide Band (IR-UWB) for a physical layer that can provide combined communication and ranging in low data rate indoor/outdoor networks. At present, it is therefore particularly relevant to design IEEE 802.15.4a MAC strategies that are appropriately tailored on the physical layer. In previous work, we proposed an UWB-tailored MAC named Uncoordinated Baseborn Wireless medium access control for UWB networks (UWB)2 that adopted the Aloha principle, based on the low probability of pulse collision for low data rate communications, and enabled location-based network optimization by providing and storing estimates of distance between nodes. This paper first revisits the (UWB)2 MAC protocol in view of its application to IEEE 802.15.4a. The structure of both control and data MAC protocol data units is defined based on the legacy 802.15.4 MAC, in order to allow a seamless support, for both centralized and distributed network topologies, as defined in the parent standard. Secondly, this work extends and completes the analysis of (UWB)2 since it takes into account multipath-prone channels. Channel parameters, for both indoor and outdoor propagation scenarios in Line Of Sight (LOS) and Non-Line Of Sight (NLOS) conditions, were derived from the channel model defined within the 802.15.4a channel sub-committee. Results highlight that the (UWB)2 protocol is robust to multipath, and provides high throughput and low delay, with performance scaling gracefully as a function of number of users and user bit rate. Results confirm and support the adoption of (UWB)2 principles for low data rate UWB communications.
2007
01 Pubblicazione su rivista::01a Articolo in rivista
The Aloha access (UWB)^2 protocol revisited for IEEE 802.15.4a / DI BENEDETTO, Maria Gabriella; DE NARDIS, Luca; G., Giancola; Domenicali, Daniele. - In: ST JOURNAL. - ISSN 1828-2105. - Vol. 4, No. 1:(2007), pp. 131-142.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/363326
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