电力线和无线混合通信可以优势互补提升电力物联网室内覆盖的综合性能。针对无线接入和电力线中继的混合通信场景,文章提出一种适用于两跳混合中继的通用MAC层算法。综合考虑物理层信道参数和MAC层的载波侦听多路访问(carrier sense mul...电力线和无线混合通信可以优势互补提升电力物联网室内覆盖的综合性能。针对无线接入和电力线中继的混合通信场景,文章提出一种适用于两跳混合中继的通用MAC层算法。综合考虑物理层信道参数和MAC层的载波侦听多路访问(carrier sense multiple access,CSMA)退避流程,建立了该MAC层算法的跨层性能分析模型,推导了两跳传输系统归一化吞吐量以及系统时延等性能;最后仿真验证了算法有效性和模型准确性,分析了物理层和MAC层关键参数影响系统性能的机理。与Basic-RTS/CTS算法相比,所提算法可有效提升系统吞吐量和时延性能。展开更多
Wireless Body Area Network(WBAN)is a cutting-edge technology that is being used in healthcare applications to monitor critical events in the human body.WBAN is a collection of in-body and on-body sensors that monitor ...Wireless Body Area Network(WBAN)is a cutting-edge technology that is being used in healthcare applications to monitor critical events in the human body.WBAN is a collection of in-body and on-body sensors that monitor human physical parameters such as temperature,blood pressure,pulse rate,oxygen level,body motion,and so on.They sense the data and communicate it to the Body Area Network(BAN)Coordinator.The main challenge for the WBAN is energy consumption.These issues can be addressed by implementing an effective Medium Access Control(MAC)protocol that reduces energy consumption and increases network lifetime.The purpose of the study is to minimize the energy consumption and minimize the delay using IEEE 802.15.4 standard.In our proposed work,if any critical events have occurred the proposed work is to classify and prioritize the data.We gave priority to the highly critical data to get the Guarantee Tine Slots(GTS)in IEEE 802.15.4 standard superframe to achieve greater energy efficiency.The proposed MAC provides higher data rates for critical data based on the history and current condition and also provides the best reliable service to high critical data and critical data by predicting node similarity.As an outcome,we proposed a MAC protocol for Variable Data Rates(MVDR).When compared to existing MAC protocols,the MVDR performed very well with low energy intake,less interruption,and an enhanced packet-sharing ratio.展开更多
针对现有太赫兹通信网络双信道MAC协议存在控制开销冗余和在竞争信道时缺少优先级调度策略等问题,提出了一种太赫兹网络中基于优先级调度的低开销双信道MAC协议(Low Overhead Dual-channel MAC Protocol Based on Priority Scheduling,L...针对现有太赫兹通信网络双信道MAC协议存在控制开销冗余和在竞争信道时缺少优先级调度策略等问题,提出了一种太赫兹网络中基于优先级调度的低开销双信道MAC协议(Low Overhead Dual-channel MAC Protocol Based on Priority Scheduling,LO-PSMAC),包含通信距离预判、优先级调度策略的CSMA/CA和精简THz频段MAC帧三种机制,可有效提升信道利用率和整体网络吞吐量,同时减小控制开销和降低数据平均时延。仿真结果表明,所提协议与现有太赫兹双信道MAC协议相比,MAC层吞吐量和信道利用率分别提升了7.14%和14.75%,数据平均时延降低了14.21%。展开更多
根据传感器节点的生存时间取决于节点能量消耗的特点,设计了节能的MAC协议.提出了一种基于节点流量的低能耗无线传感器网络MAC协议TBEE-MAC(traffic-based energy efficient MAC).在TBEE-MAC中,节点采用周期性休眠机制来节省能量,提出...根据传感器节点的生存时间取决于节点能量消耗的特点,设计了节能的MAC协议.提出了一种基于节点流量的低能耗无线传感器网络MAC协议TBEE-MAC(traffic-based energy efficient MAC).在TBEE-MAC中,节点采用周期性休眠机制来节省能量,提出了活动时间结构和基于节点流量的同步调度方式,在时间误差允许的范围内,调整了同步调度周期,减少了能量消耗.仿真显示,TBEE-MAC在提供低延时性能的基础上,能量有效性相对于S-MAC协议有很大提高.展开更多
文摘电力线和无线混合通信可以优势互补提升电力物联网室内覆盖的综合性能。针对无线接入和电力线中继的混合通信场景,文章提出一种适用于两跳混合中继的通用MAC层算法。综合考虑物理层信道参数和MAC层的载波侦听多路访问(carrier sense multiple access,CSMA)退避流程,建立了该MAC层算法的跨层性能分析模型,推导了两跳传输系统归一化吞吐量以及系统时延等性能;最后仿真验证了算法有效性和模型准确性,分析了物理层和MAC层关键参数影响系统性能的机理。与Basic-RTS/CTS算法相比,所提算法可有效提升系统吞吐量和时延性能。
文摘Wireless Body Area Network(WBAN)is a cutting-edge technology that is being used in healthcare applications to monitor critical events in the human body.WBAN is a collection of in-body and on-body sensors that monitor human physical parameters such as temperature,blood pressure,pulse rate,oxygen level,body motion,and so on.They sense the data and communicate it to the Body Area Network(BAN)Coordinator.The main challenge for the WBAN is energy consumption.These issues can be addressed by implementing an effective Medium Access Control(MAC)protocol that reduces energy consumption and increases network lifetime.The purpose of the study is to minimize the energy consumption and minimize the delay using IEEE 802.15.4 standard.In our proposed work,if any critical events have occurred the proposed work is to classify and prioritize the data.We gave priority to the highly critical data to get the Guarantee Tine Slots(GTS)in IEEE 802.15.4 standard superframe to achieve greater energy efficiency.The proposed MAC provides higher data rates for critical data based on the history and current condition and also provides the best reliable service to high critical data and critical data by predicting node similarity.As an outcome,we proposed a MAC protocol for Variable Data Rates(MVDR).When compared to existing MAC protocols,the MVDR performed very well with low energy intake,less interruption,and an enhanced packet-sharing ratio.
文摘针对现有太赫兹通信网络双信道MAC协议存在控制开销冗余和在竞争信道时缺少优先级调度策略等问题,提出了一种太赫兹网络中基于优先级调度的低开销双信道MAC协议(Low Overhead Dual-channel MAC Protocol Based on Priority Scheduling,LO-PSMAC),包含通信距离预判、优先级调度策略的CSMA/CA和精简THz频段MAC帧三种机制,可有效提升信道利用率和整体网络吞吐量,同时减小控制开销和降低数据平均时延。仿真结果表明,所提协议与现有太赫兹双信道MAC协议相比,MAC层吞吐量和信道利用率分别提升了7.14%和14.75%,数据平均时延降低了14.21%。
文摘根据传感器节点的生存时间取决于节点能量消耗的特点,设计了节能的MAC协议.提出了一种基于节点流量的低能耗无线传感器网络MAC协议TBEE-MAC(traffic-based energy efficient MAC).在TBEE-MAC中,节点采用周期性休眠机制来节省能量,提出了活动时间结构和基于节点流量的同步调度方式,在时间误差允许的范围内,调整了同步调度周期,减少了能量消耗.仿真显示,TBEE-MAC在提供低延时性能的基础上,能量有效性相对于S-MAC协议有很大提高.
