Energy efficiency comparison of MIMO-based and multihop sensor networks
EURASIP Journal on Wireless Communications and Networking
A Service-Differentiated Random Access Strategy for Multi-channel Cooperative Relaying Networks
Wireless Personal Communications: An International Journal
A slotted ALOHA protocol with cooperative diversity
Proceedings of the 4th Annual International Conference on Wireless Internet
Extending network lifetime for ALLIANCES
Computer Communications
Diversity driven cooperation protocol specification and MAC level performance evaluation
PDCS '07 Proceedings of the 19th IASTED International Conference on Parallel and Distributed Computing and Systems
Wireless networks with retransmission diversity and carrier-sense multiple access
IEEE Transactions on Signal Processing
Cooperative wireless medium access exploiting multi-beam adaptive arrays and relay selection
IEEE Transactions on Signal Processing
A cooperative multi-group priority MAC protocol for multi-packet reception channels
IEEE Transactions on Wireless Communications
ALOHA with collision resolution (ALOHA-CR): theory and software defined radio implementation
IEEE Transactions on Signal Processing
Sidelobe control in collaborative beamforming via node selection
IEEE Transactions on Signal Processing
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In this paper, we propose a new media access protocol for wireless networks, that due to its ability to resolve collisions can achieve high throughput. We view the wireless network as a spatially distributed antenna with antenna elements linked via the wireless channel. When there is a collision, the collided packets are saved in a buffer. In the slots following the collision, a set of nodes designated as nonregenerative relays retransmit the signal that they received during the collision slot. By processing the originally collided packets and the signals forwarded by the relays, the destination node can recover the original packets. The proposed scheme maintains the benefits of ALOHA systems, i.e., needs no scheduling overhead and is suitable for bursty sources, such as multimedia sources. It also offers the benefits of multi-antenna systems, i.e., spatial diversity while employing a single transmit/receive antenna at each node. Spatial diversity enables it to be robust to the wireless channel. The proposed approach achieves higher throughput and energy savings than existing techniques that allow for multiple packet reception.