Physical layer address defining method for wireless sensor network

The invention discloses a physical layer address defining method for a wireless sensor network. Rooms of a building are represented by a network node model, each room is one network node, and each room is provided with the only coordinates, and the physical layer address of each network node is consistent with the coordinates of the corresponding room. Each room in the network node model building is provided with wireless equipment, each room is simplified to be a three-dimensional cubic grid node, each cubic grid is the same in size, and each cubic grid is provided with the only coordinates; and the physical layer address of each wireless equipment is consistent with the three-dimensional coordinates of the room in which the wireless equipment is arranged, so that the wireless equipment in each room can know the specific positions of the own or other wireless equipment. Under the condition of a limited wireless transmission range, a relay point is calculated dynamically, the next hop can be found conveniently, and the information transmission is realized.