Large-system-based performance analysis and design of multiuser cooperative networks
IEEE Transactions on Signal Processing
Asymptotic analysis and design of multiuser cooperative DS-CDMA systems
ICC'09 Proceedings of the 2009 IEEE international conference on Communications
Optimal cooperative ALOHA multiple access in fading channels
IEEE Communications Letters
Grouping Algorithm for Partner Selection in Cooperative Transmission
Wireless Personal Communications: An International Journal
| Hi-index | 754.84 |
Well appreciated at the physical layer, user cooperation is introduced here as a diversity enabler for wireless random access (RA) at the medium access control sublayer. This is accomplished through a two-phase protocol in which active users start with a low power transmission attempting to reach nearby users and follow up with a high power transmission in cooperation with the users recruited in the first phase. We show that such a cooperative protocol yields a significant increase in throughput. Specifically, we prove that for networks with a large number of users, the throughput of a cooperative wireless RA network operating over Rayleigh-fading links approaches the throughput of an RA network operating over additive white Gaussian noise links-thus justifying the title of the paper. The message borne out of this result is that user cooperation offers a viable choice for migrating diversity benefits to the wireless RA regime, thus bridging the gap to wireline RA networks, without incurring a bandwidth or energy penalty