reading on "MACAW"

summary: this paper proposed MACAW-a new MAC layer protocol for wireless networks. To solve the problems met in MACA, MACAW uses lots of solutions including back-off counter copy, per flow FIFO, ACK packet, DS packet and etc. Each of the solutions is used to target one specified problem. In the process of thinking about solutions, the authors put throughput fairness in the first order. This paper left the readers lots of future work. 

background: some basic knowledge about wireless communication

Discussion: First of all, this is a very good paper not because of its idea but because the inspiration it gave us. It tells us a new way to write a paper: list all the problems of the former solution, solve them one by one. If we can't find a perfect solution, we can leave it as an open problem.

1, the discussion about ACK is quite interesting. Retransmission through transport layer is too slow because of the long time-out. Therefore, the authors used link layer recovery. I wanna ask: does this method obey the golden "end to end argument" rule?

2, the simulator created by the authors is really smart which approximates the media by dividing the space into small cubes. we can discuss some issues in wireless simulators?

3, purely using tables not graph to tell the results is not good in my opinion. Why not use graph?