Computer Science ›› 2017, Vol. 44 ›› Issue (12): 64-67.doi: 10.11896/j.issn.1002-137X.2017.12.012

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Time Synchronization Scheme for Distributed Cognitive Radio Networks Based on M&S Model

TANG Lin, LIU Jun-xia, ZHAO Li and QI Xing-bin   

  • Online:2018-12-01 Published:2018-12-01

Abstract: Aiming at the time synchronization in distributed cognitive radio network (DCRN),a collaborative time synchronization scheme based on M&R model was proposed.First,the selected primary user (PU) broadcasts the free spectrum list to the neighbor nodes through control channel,to determine the available common channel between the node pairs.Then,the neighbor node takes this PU node as a reference node,and transmits the synchronization information on this common channel.At the same time,the M&S synchronization model is used to adjust the internal timer of nodes,to realize the clock synchronization.After several iterations,finally the entire network time synchronization is rea-lized.Experimental results show that the proposed scheme can achieve the time synchronization for DCRN,and has faster convergence speed and lower cost.

Key words: Distributed cognitive radio network,Time synchronization,M&S synchronization model,Node collaborative

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