Several protocols and schemes have been proposed to reduce energy consumption in Wireless Sensor Net-works (WSNs). In this paper we employ farcoopt, a cross layer design approach with the concept of coop-eration among...Several protocols and schemes have been proposed to reduce energy consumption in Wireless Sensor Net-works (WSNs). In this paper we employ farcoopt, a cross layer design approach with the concept of coop-eration among the nodes with best farthest neighbor scheme to increase the Quality of Service (QoS), reduce energy consumption, increases performance and end-to-end throughput. We present cooperative transmission to connect previously disconnect parts of a network thus overcoming the separation problem of multi-hop network. We show that this approach improves connectivity over 50% compared to multi-hop approaches and reduces the number of nodes necessary to provide full coverage of an area up to 35%. Simulation results show that on increase of data rates i.e. packet the network life time increases in farcoopt as compared to tra-ditional multi hop approach. The result of this analysis is presented in this work.展开更多
Channel characterization and modeling are fundamental to communication system design,development,testing,and deployment.As the innate digital twins of wireless channels,channel models replicate real-world channel beha...Channel characterization and modeling are fundamental to communication system design,development,testing,and deployment.As the innate digital twins of wireless channels,channel models replicate real-world channel behaviors,e.g.,large-scale/small-scale fading,spatio-temporal-frequency non-stationarity,through mathematical and data-driven methods.This enables simulation-based validation across system development stages—from protocol design to network optimization-without costly physical testing.展开更多
In space-air-ground uniformly integrated network(SAGUIN),a centralized data control center(DCC)is deployed to manage the shared spectrum resources across the space,aerial,and ground layers under a unified communicatio...In space-air-ground uniformly integrated network(SAGUIN),a centralized data control center(DCC)is deployed to manage the shared spectrum resources across the space,aerial,and ground layers under a unified communication architecture,which makes it a promising candidate for the next-generation wireless systems.However,due to the extremely large physical scale of SAGUIN,signals transmitted across different layers experience substantially different propagation delays and channel conditions,a disparity further amplified by the network's layered structure and spatially clustered topology.On the other hand,task-oriented communications typically employ short-packet transmissions,whose durations are only a small fraction of the largepropagation delays between satellites,aerial platforms,and ground users.The above phenomena,including asynchronous and out-of-order signal arrivals induced by delay asymmetry among satellites,aerial platforms,and ground users;non-coherent transmissions over heterogeneous links with substantial timing offsets;and spatiotemporally coupled interferences arising from overlapping coverage areas and disparities in propagation delay,present major challenges for throughput modeling,access protocol design,and network resource management.In this article,we analyze the network throughput,design the multi-user access signal detection scheme,and optimize the task scheduling under ripple effect,thereby offering new insights into the deployment of future SAGUINs.展开更多
文摘Several protocols and schemes have been proposed to reduce energy consumption in Wireless Sensor Net-works (WSNs). In this paper we employ farcoopt, a cross layer design approach with the concept of coop-eration among the nodes with best farthest neighbor scheme to increase the Quality of Service (QoS), reduce energy consumption, increases performance and end-to-end throughput. We present cooperative transmission to connect previously disconnect parts of a network thus overcoming the separation problem of multi-hop network. We show that this approach improves connectivity over 50% compared to multi-hop approaches and reduces the number of nodes necessary to provide full coverage of an area up to 35%. Simulation results show that on increase of data rates i.e. packet the network life time increases in farcoopt as compared to tra-ditional multi hop approach. The result of this analysis is presented in this work.
文摘Channel characterization and modeling are fundamental to communication system design,development,testing,and deployment.As the innate digital twins of wireless channels,channel models replicate real-world channel behaviors,e.g.,large-scale/small-scale fading,spatio-temporal-frequency non-stationarity,through mathematical and data-driven methods.This enables simulation-based validation across system development stages—from protocol design to network optimization-without costly physical testing.
基金supported by the National Natural Science Foundation of China under Grant 62341112.
文摘In space-air-ground uniformly integrated network(SAGUIN),a centralized data control center(DCC)is deployed to manage the shared spectrum resources across the space,aerial,and ground layers under a unified communication architecture,which makes it a promising candidate for the next-generation wireless systems.However,due to the extremely large physical scale of SAGUIN,signals transmitted across different layers experience substantially different propagation delays and channel conditions,a disparity further amplified by the network's layered structure and spatially clustered topology.On the other hand,task-oriented communications typically employ short-packet transmissions,whose durations are only a small fraction of the largepropagation delays between satellites,aerial platforms,and ground users.The above phenomena,including asynchronous and out-of-order signal arrivals induced by delay asymmetry among satellites,aerial platforms,and ground users;non-coherent transmissions over heterogeneous links with substantial timing offsets;and spatiotemporally coupled interferences arising from overlapping coverage areas and disparities in propagation delay,present major challenges for throughput modeling,access protocol design,and network resource management.In this article,we analyze the network throughput,design the multi-user access signal detection scheme,and optimize the task scheduling under ripple effect,thereby offering new insights into the deployment of future SAGUINs.
