Next-Generation(NextG)wireless communication networks with their widespread applications require high data rates,seamless connectivity and high quality of service(QoS).To cope up with an unprecedented rise of data hun...Next-Generation(NextG)wireless communication networks with their widespread applications require high data rates,seamless connectivity and high quality of service(QoS).To cope up with an unprecedented rise of data hungry applications,users demand more spectral resources imposing a limitation on available wireless spectrum.One of the potential solutions to address the spectrum scarce issue is to incorporate in band full duplex(IBFD)or full duplex(FD)paradigm in next generation networks including 5G new radio(NR).Recently,FD has gained the research interest in cellular networks for its potential to double the wireless link capacity and enhancing spectral efficiency(SE).In half duplex(HD)cellular networks,base stations(BSs)can either perform uplink(UL)or downlink(DL)transmission at a particular time instant leading to reduced throughput levels.Due to the advancement in the self interference reduction(SIR)techniques,full duplex base stations(FD-BSs)can be employed to allow simultaneous UL and DL transmissions at the same time–frequency resources as compared to its HD counterpart.It ideally achieves twice the throughput without any additional complexity at user-equipment(UE).This paper covers a detailed survey on FD cellular networks.A series of SIR approaches,UE-UE mitigation techniques are summarized.Various existing MAC protocols and antenna architectures for FD cellular networks are outlined.An overview of security aspects for FD in cellular networks is also presented.Lastly,various open issues and possible research directions are brought up for FD cellular networks.展开更多
随着物联网技术的不断发展,窄带物联网(Narrow Band-Internet of Things,NB-IoT)技术凭借低功耗、广覆盖、大容量等特点,逐步步入人们的视野。为了保证物理层的通信安全,传统做法是进行数据加密。但是,在NB-IoT网络中,低功耗在加密算法...随着物联网技术的不断发展,窄带物联网(Narrow Band-Internet of Things,NB-IoT)技术凭借低功耗、广覆盖、大容量等特点,逐步步入人们的视野。为了保证物理层的通信安全,传统做法是进行数据加密。但是,在NB-IoT网络中,低功耗在加密算法的复杂度上有一定的要求。太复杂的加密算法会加大终端的耗电量,这与低功耗要求相悖。因此,考虑在物理层采用窃听信道模型。窃听信道模型的初衷是从信息论的角度出发,不采用复杂的密码学技术来保证通信安全。同时,考虑实际中窃听节点会对接收节点产生一定的干扰,分析在该干扰存在的情况下干扰节点的位置、数量以及功率分配对系统中安全容量的影响。展开更多
文摘Next-Generation(NextG)wireless communication networks with their widespread applications require high data rates,seamless connectivity and high quality of service(QoS).To cope up with an unprecedented rise of data hungry applications,users demand more spectral resources imposing a limitation on available wireless spectrum.One of the potential solutions to address the spectrum scarce issue is to incorporate in band full duplex(IBFD)or full duplex(FD)paradigm in next generation networks including 5G new radio(NR).Recently,FD has gained the research interest in cellular networks for its potential to double the wireless link capacity and enhancing spectral efficiency(SE).In half duplex(HD)cellular networks,base stations(BSs)can either perform uplink(UL)or downlink(DL)transmission at a particular time instant leading to reduced throughput levels.Due to the advancement in the self interference reduction(SIR)techniques,full duplex base stations(FD-BSs)can be employed to allow simultaneous UL and DL transmissions at the same time–frequency resources as compared to its HD counterpart.It ideally achieves twice the throughput without any additional complexity at user-equipment(UE).This paper covers a detailed survey on FD cellular networks.A series of SIR approaches,UE-UE mitigation techniques are summarized.Various existing MAC protocols and antenna architectures for FD cellular networks are outlined.An overview of security aspects for FD in cellular networks is also presented.Lastly,various open issues and possible research directions are brought up for FD cellular networks.
文摘随着物联网技术的不断发展,窄带物联网(Narrow Band-Internet of Things,NB-IoT)技术凭借低功耗、广覆盖、大容量等特点,逐步步入人们的视野。为了保证物理层的通信安全,传统做法是进行数据加密。但是,在NB-IoT网络中,低功耗在加密算法的复杂度上有一定的要求。太复杂的加密算法会加大终端的耗电量,这与低功耗要求相悖。因此,考虑在物理层采用窃听信道模型。窃听信道模型的初衷是从信息论的角度出发,不采用复杂的密码学技术来保证通信安全。同时,考虑实际中窃听节点会对接收节点产生一定的干扰,分析在该干扰存在的情况下干扰节点的位置、数量以及功率分配对系统中安全容量的影响。
