If the total number of child nodes and pull requestnodes is bigger than the out link number of the node, nodeB must stop sending pull packets to one pull request node.In this case, the node will select a node from the list of pullrequest nodes and send a PULL STOP MESSAGE to theselected node to inform about the termination of sendingpull packets. The selection process is done based on a priority policy, which calculate the priority of each pull requestnode P as follows
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