计算机工程与应用
計算機工程與應用
계산궤공정여응용
COMPUTER ENGINEERING AND APPLICATIONS
2015年
18期
99-103
,共5页
无线传感器网络%位置梯度%交错调度%协调性回退%时延%能耗
無線傳感器網絡%位置梯度%交錯調度%協調性迴退%時延%能耗
무선전감기망락%위치제도%교착조도%협조성회퇴%시연%능모
Wireless Sensor Network(WSN)%geographic gradient%staggered schedule%coordinative back-off%latency%energy consumption
在无线传感器网络中,针对提高能量有效性和降低延时的问题,提出GG-MAC协议,从网络层和MAC层综合的角度来提高WSN性能。在GG-MAC中,感知节点首先根据与汇聚节点的相对距离获取粗、细粒度梯度值,建立梯度漏斗;根据粗粒度梯度值选择适当的唤醒时间,使在数据汇聚方向的节点依次被唤醒;采用协调性回退策略,依据细粒度梯度值设定差异性的信道接入时间。仿真结果表明,GG-MAC节省了能量消耗,并降低了传输时延。
在無線傳感器網絡中,針對提高能量有效性和降低延時的問題,提齣GG-MAC協議,從網絡層和MAC層綜閤的角度來提高WSN性能。在GG-MAC中,感知節點首先根據與彙聚節點的相對距離穫取粗、細粒度梯度值,建立梯度漏鬥;根據粗粒度梯度值選擇適噹的喚醒時間,使在數據彙聚方嚮的節點依次被喚醒;採用協調性迴退策略,依據細粒度梯度值設定差異性的信道接入時間。倣真結果錶明,GG-MAC節省瞭能量消耗,併降低瞭傳輸時延。
재무선전감기망락중,침대제고능량유효성화강저연시적문제,제출GG-MAC협의,종망락층화MAC층종합적각도래제고WSN성능。재GG-MAC중,감지절점수선근거여회취절점적상대거리획취조、세립도제도치,건립제도루두;근거조립도제도치선택괄당적환성시간,사재수거회취방향적절점의차피환성;채용협조성회퇴책략,의거세립도제도치설정차이성적신도접입시간。방진결과표명,GG-MAC절성료능량소모,병강저료전수시연。
In wireless sensor networks, considering improving energy efficiency and latency performance, this paper pro-poses a new WSN protocol, which includes design of both network layer and MAC layer, called GG-MAC. GG-MAC builds the gradient funnel with the sensors’major and minor gradient, related to the relative distance from sink. In order to assure the transmission continuity, GG-MAC adopts staggered wakeup schedule according to the major gradient of nodes. Also, the coordinative back-off channel access time adapts to nodes’minor gradient. Simulation results show that GG-MAC provides significant energy savings and latency reduction.