Channel initialization method for distributed cognitive radio network
A technology of cognitive radio and initialization method is applied in the field of channel initialization of distributed cognitive radio network to achieve the effect of solving the difficulty of initial networking
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Embodiment 1
[0026] Such as image 3 As shown, this is a schematic diagram of the establishment of a multi-channel multi-hop distributed cognitive radio network. The communication frequency band is 694-806MHz, which is divided into 14 channels, and the channel numbers are from 0 to 13. The number in the middle of the circle indicates the LID of the node, and the combination of numbers indicates ; here, "○" indicates the root node, and "●" indicates the common node, such as image 3 As shown, it can be seen that the LIDs of ordinary nodes in different locations are different. The establishment process of this distributed network is as follows:
[0027] Step 1: Select a node with a node ID of 31 as the root node, and assume that the available channels locally perceived by the node are 0, 1, 3, 5, 6, 8, 10, 12, and 13. Select the strategy to determine the three channels 0, 1, and 3 as the working channels of the distributed network, enter the working state, broadcast and send Beacon messages, ...
Embodiment 2
[0041] Such as Figure 4 As shown in , it shows a schematic diagram of a late network node accessing a distributed cognitive radio network. Here, "○" means the root node, "●" means the normal node, Represents a late-entry node, assuming that the working channels of the current distributed network are 1, 2, and 3; the process of late-entry node 49 accessing the distributed network is as follows:
[0042] Step 1: the late network entry node 49 listens to the Beacon message on its perceived 0, 1, 2, 3, 5, 6, 8, 11, and 13 channels, first performs rough capture, and the time to stay on each idle channel is 300ms, here, the execution time length TC of the coarse capture is 2s.
[0043] Step 2: When the rough capture phase ends, according to the rough capture result records, the number of Beacon captured on channels 1, 2, and 3 are respectively: 120, 118, and 119, and the number on other idle channels is 0. According to the captured Beacon report Select channels 1, 2, and 3 as fi...
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