Due to the limited uplink capability in heterogeneousnetworks (HetNets), the decoupled uplinkand downlink access (DUDA) mode has recently beenproposed to improve the uplink performance. In thispaper, the random discon...Due to the limited uplink capability in heterogeneousnetworks (HetNets), the decoupled uplinkand downlink access (DUDA) mode has recently beenproposed to improve the uplink performance. In thispaper, the random discontinuous transmission (DTX)at user equipment (UE) is adopted to reduce the interferencecorrelation across different time slots. By utilizingstochastic geometry, we analytically derive themean local delay and energy efficiency (EE) of an uplinkHetNet with UE random DTX scheme under theDUDA mode. These expressions are further approximatedas closed forms under reasonable assumptions.Our results reveal that under the DUDA mode, there isan optimal EE with respect to mute probability underthe finite local delay constraint. In addition, with thesame finite mean local delay as under the coupled uplinkand downlink access (CUDA) mode, the HetNetsunder the DUDA mode can achieve a higher EE witha lower mute probability.展开更多
为兰州重离子加速器冷却储存环(Cooler Storage Ring of Heavy Ion Research Facility in Lanzhou,HIRFLCSR)的外靶实验设计了一个γ球阵列探测器子触发判选系统,该系统根据γ球阵列探测器结构和探测到的信号特征在短时间内进行有效击...为兰州重离子加速器冷却储存环(Cooler Storage Ring of Heavy Ion Research Facility in Lanzhou,HIRFLCSR)的外靶实验设计了一个γ球阵列探测器子触发判选系统,该系统根据γ球阵列探测器结构和探测到的信号特征在短时间内进行有效击中物理事例的提取。考虑到γ球阵列探测器读出通道较多,随之而来的各个通道物理事例信息之和量级较大且需要可靠、高速、长距离的数据传输结构,γ球阵列探测器触发判选系统采用主从式结构和基于光纤通信技术进行设计,同时为缓解γ球阵列探测器子触发判选系统逻辑算法的复杂性,将子触发系统划分上下行子触发系统。基于整体现场可编程门阵列(Field Programmable Gate Array,FPGA)逻辑在线重构,触发判选逻辑分层组织,实现γ球阵列探测器子触发判选系统功能的灵活重构性。结果表明,通过信号源验证能够产生正确的子触发脉冲信号,对触发判选系统间光线通信链路误码率测试达到2×10^(-14)以下,该γ球阵列探测器子触发判选系统工作良好。展开更多
基金supported in part by the National Key R&D Program of China under Grant 2021YFB 2900304the Shenzhen Science and Technology Program under Grants KQTD20190929172545139 and ZDSYS20210623091808025.
文摘Due to the limited uplink capability in heterogeneousnetworks (HetNets), the decoupled uplinkand downlink access (DUDA) mode has recently beenproposed to improve the uplink performance. In thispaper, the random discontinuous transmission (DTX)at user equipment (UE) is adopted to reduce the interferencecorrelation across different time slots. By utilizingstochastic geometry, we analytically derive themean local delay and energy efficiency (EE) of an uplinkHetNet with UE random DTX scheme under theDUDA mode. These expressions are further approximatedas closed forms under reasonable assumptions.Our results reveal that under the DUDA mode, there isan optimal EE with respect to mute probability underthe finite local delay constraint. In addition, with thesame finite mean local delay as under the coupled uplinkand downlink access (CUDA) mode, the HetNetsunder the DUDA mode can achieve a higher EE witha lower mute probability.
文摘为兰州重离子加速器冷却储存环(Cooler Storage Ring of Heavy Ion Research Facility in Lanzhou,HIRFLCSR)的外靶实验设计了一个γ球阵列探测器子触发判选系统,该系统根据γ球阵列探测器结构和探测到的信号特征在短时间内进行有效击中物理事例的提取。考虑到γ球阵列探测器读出通道较多,随之而来的各个通道物理事例信息之和量级较大且需要可靠、高速、长距离的数据传输结构,γ球阵列探测器触发判选系统采用主从式结构和基于光纤通信技术进行设计,同时为缓解γ球阵列探测器子触发判选系统逻辑算法的复杂性,将子触发系统划分上下行子触发系统。基于整体现场可编程门阵列(Field Programmable Gate Array,FPGA)逻辑在线重构,触发判选逻辑分层组织,实现γ球阵列探测器子触发判选系统功能的灵活重构性。结果表明,通过信号源验证能够产生正确的子触发脉冲信号,对触发判选系统间光线通信链路误码率测试达到2×10^(-14)以下,该γ球阵列探测器子触发判选系统工作良好。
