| Retransmission != repeat: simple retransmission permutation can resolve overlapping channel collisions Recent countries visiting this post |  |
 | 7 | United States |
 | 3 | |
 | 1 | China |
| Retransmission != repeat: simple retransmission permutation can resolve overlapping channel collisions Recent countries visiting this post | |
| 7 | United States |
| 3 | |
| 1 | China |