| A cross-layer design for resource allocation and congestion control in multichannel multi-hop cognitive radio networks Recent countries visiting this post |  |
 | 4 | |
 | 3 | United States |
 | 1 | China |
 | 1 | Germany |
| A cross-layer design for resource allocation and congestion control in multichannel multi-hop cognitive radio networks Recent countries visiting this post | |
| 4 | |
| 3 | United States |
| 1 | China |
| 1 | Germany |