Since wireless links in Ad hoc networks are more fragile than those in traditional wireless networks due to route flapping,multi-node cooperation plays an important role in ensuring the quality of service( QoS). Based...Since wireless links in Ad hoc networks are more fragile than those in traditional wireless networks due to route flapping,multi-node cooperation plays an important role in ensuring the quality of service( QoS). Based on the authors' previous work,this paper proposes a receiver-controlled multi-node cooperation routing protocol,known as AODV-RCC. In this protocol,nodes form a cooperation group based on signal power. In a cooperation group,signal power between a partner and a transmitter,as well as signal power between the partner and the receiver,must be larger than the signal power between the transmitter and the receiver. Otherwise,the transmission will not benefit from cooperation. To avoid collision or congestion,each cooperation group only contains one partner. This partner offers both data and ACK cooperative retransmission. Its retransmission time should be shorter than the internal retry time of the transmitter's MAC layer,because it is better for the partner to retransmit firstly,as it offers a more reliable cooperative link. In AODV-RCC,it is the receiver that chooses the partner,because the link between the partner and the receiver is the most important. According to our simulation results,AODV-RCC shortens the end-to-end delay and increases the packet delivery ratio.展开更多
针对我国深地资源勘查,研制出了深度3000m内矿产资源探测井中/井间激发极化法大功率激电系统.相比地面激发极化法,井中激电系统借助钻井进行勘探,收发装置更接近于目标体,对深部隐伏矿产、油气资源勘查更具优势.井中激电系统采集控制和...针对我国深地资源勘查,研制出了深度3000m内矿产资源探测井中/井间激发极化法大功率激电系统.相比地面激发极化法,井中激电系统借助钻井进行勘探,收发装置更接近于目标体,对深部隐伏矿产、油气资源勘查更具优势.井中激电系统采集控制和数据处理是整个系统工作的中枢,在工作中需要解决高温高压条件下的数据采集、长距离遥传通讯、数据高速传输、接收和发射同步等技术难题.本文基于测井采集控制管理平台(acquisition control management expert,ACME)拓展性强的特点,研发了一套与井中激电系统配套的采集控制和处理软件.井中激电系统采集控制软件通过动态库挂接在ACME上,实现激电系统的数据采集、实时传输、显示、监测、保存和处理成图等功能,并成功应用于大冶市铜铁金属矿的井中探测实验,数据处理结果和已知资料高度一致,达到预期效果.展开更多
基金Sponsored by the Natural Scientific Research Innovation Foundation in Harbin Institute of Technology(Grant No.HIT.NSRIF.2013029)the National Science and Technology Major Project(Grant No.2012ZX03004003)+1 种基金the National Basic Research Development Program of China(973 Program)(Grant No.2013CB329003)the National Natural Science Foundation of China(Grant No.61201148 and No.61101123)
文摘Since wireless links in Ad hoc networks are more fragile than those in traditional wireless networks due to route flapping,multi-node cooperation plays an important role in ensuring the quality of service( QoS). Based on the authors' previous work,this paper proposes a receiver-controlled multi-node cooperation routing protocol,known as AODV-RCC. In this protocol,nodes form a cooperation group based on signal power. In a cooperation group,signal power between a partner and a transmitter,as well as signal power between the partner and the receiver,must be larger than the signal power between the transmitter and the receiver. Otherwise,the transmission will not benefit from cooperation. To avoid collision or congestion,each cooperation group only contains one partner. This partner offers both data and ACK cooperative retransmission. Its retransmission time should be shorter than the internal retry time of the transmitter's MAC layer,because it is better for the partner to retransmit firstly,as it offers a more reliable cooperative link. In AODV-RCC,it is the receiver that chooses the partner,because the link between the partner and the receiver is the most important. According to our simulation results,AODV-RCC shortens the end-to-end delay and increases the packet delivery ratio.
文摘针对我国深地资源勘查,研制出了深度3000m内矿产资源探测井中/井间激发极化法大功率激电系统.相比地面激发极化法,井中激电系统借助钻井进行勘探,收发装置更接近于目标体,对深部隐伏矿产、油气资源勘查更具优势.井中激电系统采集控制和数据处理是整个系统工作的中枢,在工作中需要解决高温高压条件下的数据采集、长距离遥传通讯、数据高速传输、接收和发射同步等技术难题.本文基于测井采集控制管理平台(acquisition control management expert,ACME)拓展性强的特点,研发了一套与井中激电系统配套的采集控制和处理软件.井中激电系统采集控制软件通过动态库挂接在ACME上,实现激电系统的数据采集、实时传输、显示、监测、保存和处理成图等功能,并成功应用于大冶市铜铁金属矿的井中探测实验,数据处理结果和已知资料高度一致,达到预期效果.
