CAJ | 학술논문

在现代工业无线网络中,IEEE 802．15．4标准以其独特的低功耗、低成本特点被广泛应用。 IEEE 802．15．4可以提供最低0．006%的占空比,最大限度降低功耗,同时提供的保障时隙GTS机制为节点提供了实时服务保障。然而,在为大规模节点提供保障时,IEEE 802．15．4提供的GTS机制缺乏灵活性,只能为有限节点提供实时保障服务。本文针对这一问题提出一种多节点共享保障时隙分配策略,允许多个数据流在满足延迟需求前提下,共享同一个GTS减少带宽浪费。分析表明,多节点共享的保障时隙分配策略与普通分配方法相比,可有效提高带宽利用率。
재현대공업무선망락중,IEEE 802．15．4표준이기독특적저공모、저성본특점피엄범응용。 IEEE 802．15．4가이제공최저0．006%적점공비,최대한도강저공모,동시제공적보장시극GTS궤제위절점제공료실시복무보장。연이,재위대규모절점제공보장시,IEEE 802．15．4제공적GTS궤제결핍령활성,지능위유한절점제공실시보장복무。본문침대저일문제제출일충다절점공향보장시극분배책략,윤허다개수거류재만족연지수구전제하,공향동일개GTS감소대관낭비。분석표명,다절점공향적보장시극분배책략여보통분배방법상비,가유효제고대관이용솔。
With unique characteristics of low power consumption and low cost,IEEE 802. 15. 4 standard is widely used in the modern industrial wireless networks. It can provide the lowest 0. 006% of duty ratio to reduce power consumption,and offer real-time service for the node through the guarantee time slots( GTS) mechanism. However, IEEE 802. 15. 4 can only provide real-time guarantees service for certain nodes,which is lack of flexibility for large-scale networks. A shared security timeslot allocation policy by multi-node is present for overcome the shorting of special GTS allocation method,taking into account the traffic specifications and the delay requirements of the flows. The policy enables the use of a GTS by multiple nodes, and still ensure delay and bandwidth requirements. Numerical analysis clearly showed that,compared with the traditional method,the improvement of allocation policy can effectively improve the bandwidth utilization.