CAJ | 학술논문

提出了基于混合GPS同步与信标同步的无线Mesh网络同步方案,能够简化系统设计,防止同步误差逐级累积.在Mesh骨干节点间采用GPS同步,设计并实现了不依赖于CPLD等硬件的GPS时隙同步算法,简化了系统硬件设计.提出了在失去GPS后骨干节点同步修正算法,在失去GPS信号后能在一定的时间内维持系统的同步,提高了系统的可靠性.在Mesh接入节点与骨干节点之间采用改进的信标同步方案,能够在较远的距离达到10us级的同步精度.最后通过实验数据验证同步方案的同步精度.
제출료기우혼합GPS동보여신표동보적무선Mesh망락동보방안,능구간화계통설계,방지동보오차축급루적.재Mesh골간절점간채용GPS동보,설계병실현료불의뢰우CPLD등경건적GPS시극동보산법,간화료계통경건설계.제출료재실거GPS후골간절점동보수정산법,재실거GPS신호후능재일정적시간내유지계통적동보,제고료계통적가고성.재Mesh접입절점여골간절점지간채용개진적신표동보방안,능구재교원적거리체도10us급적동보정도.최후통과실험수거험증동보방안적동보정도.
A new synchronization structure which combined GPS and beacon synchronization is presented, which can prevent the accumulation of error and reduce the system complexity. GPS synchronization algorithm is used between backbone nodes. A timeslot sync-algorithm without CPLD chips is designed and implemented. A synchronization maintain algorithm is presented, which maintain system synchronization after the failure of obtaining synchronization signal from GPS. Therefore this algorithm improved system robust. Beacon sync-algorithm is used between backbone node and access node. It can reach a 10us resolution at a distance. Finally the experimental data is analyzed.