Opportunistic Packet Scheduling and Media Access Control for Wireless LANs and Multi-Hop Ad Hoc Networks. J. Wang, H. Zhai and Y. Fang, WCNC 2004.
This paper proposes to perform a scheduling similar to proportional fairness in multi-hop networks, by sending a CTS to a list of potential relays (those whose packets are waiting for transmission in the output buffer of the node), receiving the RTS with an indication of current signal strength, and picking the "best" node, according to a metric similar to that of proportional fair (based on the achieved throughput to each node up to this time).
The idea is straight-forward, but quite good actually (by which I mean: this should be a better-than-WCNC paper). It should be obvious that, as soon as several packets are awaiting transmission at any node, then the node has the choice to pick which one to transmit based on instantaneous conditions.
Performance gains shown, obviously. Little analysis, simulation only.