随着媒体消费的不断增长,传统电视传输面临着速度和质量的双重挑战。为此,5G网络切片技术提供了一种革新方案,能够在同一物理网络基础上实现多种服务的高效传输。分析5G网络切片技术如何利用增强移动宽带(Enhanced Mobile Broadband,eM...随着媒体消费的不断增长,传统电视传输面临着速度和质量的双重挑战。为此,5G网络切片技术提供了一种革新方案,能够在同一物理网络基础上实现多种服务的高效传输。分析5G网络切片技术如何利用增强移动宽带(Enhanced Mobile Broadband,eMBB)、超可靠低时延通信(Ultra-Reliable and Low-Latency Communication,uRLLC)、海量机器类通信(Massive Machine Type Communication,mMTC)这3大服务类别,并结合非正交技术多址接入(Non-Orthogonal Multiple Access,NOMA)技术和波束构成技术,提高电视传输的质量与速度,引领未来传输技术的发展趋势。展开更多
Serving multiple cell-edge mobile terminals poses multifaceted challenges due to the increased transmission power and interferences, which could be overcome by relay communications. With the recent advancement of 5G t...Serving multiple cell-edge mobile terminals poses multifaceted challenges due to the increased transmission power and interferences, which could be overcome by relay communications. With the recent advancement of 5G technologies, non-orthogonal multiple access(NOMA) has been used at relay node to transmit multiple messages simultaneously to multiple cell-edge users. In this paper, a Collaborative NOMA Assisted Relaying(CNAR) system for 5G is proposed by enabling the collaboration of source-relay(S-R) and relay-destination(R-D) NOMA links. The relay node of the CNAR decodes the message for itself from S-R NOMA signal and transmits the remaining messages to the multiple cell-edge users in R-D link. A simplified-CNAR(S-CNAR) system is then developed to reduce the relay complexity. The outage probabilities for both systems are analyzed by considering outage behaviors in S-R and R-D links separately. To guarantee the data rate, the optimal power allocation among NOMA users is achieved by minimizing the outage probability. The ergodic sum capacity in high SNR regime is also approximated. Our mathematical analysis and simulation results show that CNAR system outperforms existing transmission strategies and S-CNAR reaches similar performance with much lower complexity.展开更多
5G(Fifth Generation Mobile Communication Network)时代的到来加快了各行业的发展和改革。将5G与物联网、车联网、工业互联网等产业相结合成为了必然的趋势。首先结合车联网介绍了5G的核心技术NOMA(Non-Orthogonal Multiple Access),...5G(Fifth Generation Mobile Communication Network)时代的到来加快了各行业的发展和改革。将5G与物联网、车联网、工业互联网等产业相结合成为了必然的趋势。首先结合车联网介绍了5G的核心技术NOMA(Non-Orthogonal Multiple Access),并将其与传统的OFDM(Orthogonal Frequency Division Multiplexing)进行了比较。随后探讨了基于5G的车联网架构。最后对5G车联网进行了展望。展开更多
The major challenge faced by the fifth generation(5G) mobile network is higher spectral efficiency and massive connectivity,i.e.,the target spectrum efficiency is 3 times over 4G,and the target connection density is o...The major challenge faced by the fifth generation(5G) mobile network is higher spectral efficiency and massive connectivity,i.e.,the target spectrum efficiency is 3 times over 4G,and the target connection density is one million devices per square kilometer.These requirements are difficult to be satisfied with orthogonal multiple access(OMA) schemes.Non-orthogonal multiple access(NOMA) has thus been proposed as a promising candidate to address some of the challenges for 5G.In this paper,a comprehensive survey of different candidate NOMA schemes for 5G is presented,where the usage scenarios of5 G and the application requirements for NOMA are firstly discussed.A general framework of NOMA scheme is established and the features of typical NOMA schemes are analyzed and compared.We focus on the recent progress and challenge of NOMA in standardization of international telecommunication union(ITU),and 3rd generation partnership project(3GPP).In addition,prototype development and future research directions are also provided respectively.展开更多
文摘随着媒体消费的不断增长,传统电视传输面临着速度和质量的双重挑战。为此,5G网络切片技术提供了一种革新方案,能够在同一物理网络基础上实现多种服务的高效传输。分析5G网络切片技术如何利用增强移动宽带(Enhanced Mobile Broadband,eMBB)、超可靠低时延通信(Ultra-Reliable and Low-Latency Communication,uRLLC)、海量机器类通信(Massive Machine Type Communication,mMTC)这3大服务类别,并结合非正交技术多址接入(Non-Orthogonal Multiple Access,NOMA)技术和波束构成技术,提高电视传输的质量与速度,引领未来传输技术的发展趋势。
文摘Serving multiple cell-edge mobile terminals poses multifaceted challenges due to the increased transmission power and interferences, which could be overcome by relay communications. With the recent advancement of 5G technologies, non-orthogonal multiple access(NOMA) has been used at relay node to transmit multiple messages simultaneously to multiple cell-edge users. In this paper, a Collaborative NOMA Assisted Relaying(CNAR) system for 5G is proposed by enabling the collaboration of source-relay(S-R) and relay-destination(R-D) NOMA links. The relay node of the CNAR decodes the message for itself from S-R NOMA signal and transmits the remaining messages to the multiple cell-edge users in R-D link. A simplified-CNAR(S-CNAR) system is then developed to reduce the relay complexity. The outage probabilities for both systems are analyzed by considering outage behaviors in S-R and R-D links separately. To guarantee the data rate, the optimal power allocation among NOMA users is achieved by minimizing the outage probability. The ergodic sum capacity in high SNR regime is also approximated. Our mathematical analysis and simulation results show that CNAR system outperforms existing transmission strategies and S-CNAR reaches similar performance with much lower complexity.
文摘5G(Fifth Generation Mobile Communication Network)时代的到来加快了各行业的发展和改革。将5G与物联网、车联网、工业互联网等产业相结合成为了必然的趋势。首先结合车联网介绍了5G的核心技术NOMA(Non-Orthogonal Multiple Access),并将其与传统的OFDM(Orthogonal Frequency Division Multiplexing)进行了比较。随后探讨了基于5G的车联网架构。最后对5G车联网进行了展望。
基金supported by the National High Technology Research and Development Program of China (863 Program, No. 2015AA01A709)
文摘The major challenge faced by the fifth generation(5G) mobile network is higher spectral efficiency and massive connectivity,i.e.,the target spectrum efficiency is 3 times over 4G,and the target connection density is one million devices per square kilometer.These requirements are difficult to be satisfied with orthogonal multiple access(OMA) schemes.Non-orthogonal multiple access(NOMA) has thus been proposed as a promising candidate to address some of the challenges for 5G.In this paper,a comprehensive survey of different candidate NOMA schemes for 5G is presented,where the usage scenarios of5 G and the application requirements for NOMA are firstly discussed.A general framework of NOMA scheme is established and the features of typical NOMA schemes are analyzed and compared.We focus on the recent progress and challenge of NOMA in standardization of international telecommunication union(ITU),and 3rd generation partnership project(3GPP).In addition,prototype development and future research directions are also provided respectively.
