A method for a first node to participate in an ad hoc network including the first node and at least second and third nodes, the method comprising: receiving a first link information broadcasted omnidirectionally by the second node, the first link information indicating if the second node is communicating via a first directional link in a first polarization with the third node, wherein the first link information includes a first ID of the second node, a second ID of the third node, and a free or busy status of communication in the first polarization; examining the first link information and determining whether the second node is communicating via the first directional link in the first polarization with the third node; and when the second node is communicating via the first directional link in the first polarization with the third node and the first node is to communicate via a second directional link in a second polarization with the second node, the second polarization being substantially orthogonal to the first polarization, the first node: establishing the second directional link in the second polarization with the second node; after establishing the second directional link in the second polarization with the second node and prior to sending a data via the second directional link in the second polarization to the second node, broadcasting omnidirectionally a second link information, the second link information indicating the first node is communicating via the second directional link in the second polarization with the second node; and after broadcasting omnidirectionally the second link information, sending the data via the second directional link in the second polarization to the second node. receiving a first link information broadcasted omnidirectionally by the second node, the first link information indicating if the second node is communicating via a first directional link in a first polarization with the third node, wherein the first link information includes a first ID of the second node, a second ID of the third node, and a free or busy status of communication in the first polarization; examining the first link information and determining whether the second node is communicating via the first directional link in the first polarization with the third node; and when the second node is communicating via the first directional link in the first polarization with the third node and the first node is to communicate via a second directional link in a second polarization with the second node, the second polarization being substantially orthogonal to the first polarization, the first node: establishing the second directional link in the second polarization with the second node; after establishing the second directional link in the second polarization with the second node and prior to sending a data via the second directional link in the second polarization to the second node, broadcasting omnidirectionally a second link information, the second link information indicating the first node is communicating via the second directional link in the second polarization with the second node; and after broadcasting omnidirectionally the second link information, sending the data via the second directional link in the second polarization to the second node.