CAJ | 학술논문

在无线传感器网络中，大多数定位算法性能取决于锚节点数量以及分布位置，所以定位误差相对较大。在此前提下，提出基于动态锚节点的改进加权定位算法（IWLA-DAN）。首先证明能与未知节点通信的三个锚节点构成的三角形三边相等时定位误差最小，根据该结论得出权值公式，然后通过三边测量法和加权算法求得未知节点位置，同时升级该节点为伪锚节点继续参与网络中其他节点的定位。最后通过Matlab对算法进行仿真，实验结果表明改进后算法定位误差减小，节点定位精度得到提高。
재무선전감기망락중，대다수정위산법성능취결우묘절점수량이급분포위치，소이정위오차상대교대。재차전제하，제출기우동태묘절점적개진가권정위산법（IWLA-DAN）。수선증명능여미지절점통신적삼개묘절점구성적삼각형삼변상등시정위오차최소，근거해결론득출권치공식，연후통과삼변측량법화가권산법구득미지절점위치，동시승급해절점위위묘절점계속삼여망락중기타절점적정위。최후통과Matlab대산법진행방진，실험결과표명개진후산법정위오차감소，절점정위정도득도제고。
In wireless sensor networks,most of the localisation algorithms have relatively large positioning errors because they entirely depend on the number and distribution position of anchor nodes.On this premise,a new method called the improved weighted localisation algorithm(IWLA-DAN)based on dynamic anchor node is proposed.First,we can get weighting formula by proving the conclusion that the positioning has the least error when the triangle is trilaterally equal and consists of three anchor nodes which can communicated with the unknown node,then the unknown node is located through trilateration and weighting algorithm.At the same time,the node should be updated to pseudo node and continues to partici-pate in the localisation of other nodes in the network.Finally,simulation of the algorithm is carried out through Matlab,and the experimental result shows that the positioning error is reduced and the node localisation accuracy is increased after the improvement of the algorithm.