ALOHA with Collision Resolution: Physical layer description and software defined radio implementation
Xin Liu, John Kountouriotis, Athina P. Petropulu, Kapil R. Dandekar · 2010
A cross-layer scheme, namely ALOHA with Collision Resolution (ALOHA-CR), is proposed for high throughput wireless communications in a cellular scenario. Transmissions occur in a time-slotted ALOHA-type fashion but with an important difference: simultaneous transmissions of two users can be successful. The physical layer required to achieve this functionality is described and the statistical properties of the user delays are determined so that the probability of user separation is maximized. An implementation of ALOHA-CR on the Wireless Open Access Research Platform (WARP) testbed containing software defined radio nodes is discussed and experimental results are presented.