海上异构无线网络覆盖下的业务需求和节点多种多样,这就要求网络资源在分配时需要兼顾匹配性和网络性能。相邻多节点在选择无线网络时,易产生策略冲突并大量接入同一网络,进而导致网络负载不均衡、接入阻塞率高和服务质量(quality of se...海上异构无线网络覆盖下的业务需求和节点多种多样,这就要求网络资源在分配时需要兼顾匹配性和网络性能。相邻多节点在选择无线网络时,易产生策略冲突并大量接入同一网络,进而导致网络负载不均衡、接入阻塞率高和服务质量(quality of service,Qos)降低。针对以上问题提出一种基于网络评价和时隙分配的网络接入选择算法,设计网络评价模块、时隙分配模块和接入决策模块,通过业务评价和阻塞率估计对可选网络进行综合评价以提高匹配性,根据节点执行业务的优先级对多节点进行时隙分配,依序优化网络接入策略。仿真结果表明,相对于负载均衡和多属性决策算法,所提算法的节点平均接入阻塞率降低了32.09%,20.87%,节点平均吞吐量提升了76.90%,33.25%,网络的负载均衡性和传输效率均得到有效提升。展开更多
A generalized multiple-mode prolate spherical wave functions (PSWFs) multi-carrier with index modulation approach is proposed with the purpose of improving the spectral efficiency of PSWFs multi-carrier systems. The p...A generalized multiple-mode prolate spherical wave functions (PSWFs) multi-carrier with index modulation approach is proposed with the purpose of improving the spectral efficiency of PSWFs multi-carrier systems. The proposed method,based on the optimized multi-index modulation, does not limit the number of signals in the first and second constellations and abandons the concept of limiting the number of signals in different constellations. It successfully increases the spectrum efficiency of the system while expanding the number of modulation symbol combinations and the index dimension of PSWFs signals. The proposed method outperforms the PSWFs multi-carrier index modulation method based on optimized multiple indexes in terms of spectrum efficiency, but at the expense of system computational complexity and bit error performance. For example, with n=10 subcarriers and a bit error rate of 1×10^(-5),spectral efficiency can be raised by roughly 12.4%.展开更多
文摘海上异构无线网络覆盖下的业务需求和节点多种多样,这就要求网络资源在分配时需要兼顾匹配性和网络性能。相邻多节点在选择无线网络时,易产生策略冲突并大量接入同一网络,进而导致网络负载不均衡、接入阻塞率高和服务质量(quality of service,Qos)降低。针对以上问题提出一种基于网络评价和时隙分配的网络接入选择算法,设计网络评价模块、时隙分配模块和接入决策模块,通过业务评价和阻塞率估计对可选网络进行综合评价以提高匹配性,根据节点执行业务的优先级对多节点进行时隙分配,依序优化网络接入策略。仿真结果表明,相对于负载均衡和多属性决策算法,所提算法的节点平均接入阻塞率降低了32.09%,20.87%,节点平均吞吐量提升了76.90%,33.25%,网络的负载均衡性和传输效率均得到有效提升。
基金supported by the China National Postdoctoral Program for Innovative Talents(BX20200039)the Special Fund Project of“Mount Taishan Scholars”Construction Project in Shandong Province(ts20081130).
文摘A generalized multiple-mode prolate spherical wave functions (PSWFs) multi-carrier with index modulation approach is proposed with the purpose of improving the spectral efficiency of PSWFs multi-carrier systems. The proposed method,based on the optimized multi-index modulation, does not limit the number of signals in the first and second constellations and abandons the concept of limiting the number of signals in different constellations. It successfully increases the spectrum efficiency of the system while expanding the number of modulation symbol combinations and the index dimension of PSWFs signals. The proposed method outperforms the PSWFs multi-carrier index modulation method based on optimized multiple indexes in terms of spectrum efficiency, but at the expense of system computational complexity and bit error performance. For example, with n=10 subcarriers and a bit error rate of 1×10^(-5),spectral efficiency can be raised by roughly 12.4%.
