SAN(System Area Network)within cluster brings high bandwidths and low latencies to IPC(Inter-Process Communication). However,the communication performance has not been able to makefull use of these hardware improvemen...SAN(System Area Network)within cluster brings high bandwidths and low latencies to IPC(Inter-Process Communication). However,the communication performance has not been able to makefull use of these hardware improvements due to many software overheads. To address this problem,In-tel Corporation,Compaq Computer Corporation, and Microsoft Corporation jointly authored the VIA (Virtual Interface Architecture)specification.As an industrial standard of ULN(User-Level Networking),Ⅵ Architecture defines a set of data operations for message passing, to achieve high-bandwidth, low-latency communication between any couple nodes within cluster ,as well as minimize CPU cycles. VIA gives direct access to network inter-face,bypasses operating system in memory region protected mode ,avoid copies of data during message passing ,and avoid interrupts and context switches if possible.This article describes the principles and mechanism of the Ⅵ Architecture and THVIA.展开更多
Massive multiple input and multiple output(MIMO) is a key technology of the fifth generation(5 G) wireless communication systems, which brings various advantages, such as high spectral efficiency and energy efficiency...Massive multiple input and multiple output(MIMO) is a key technology of the fifth generation(5 G) wireless communication systems, which brings various advantages, such as high spectral efficiency and energy efficiency. In MIMO system, spatial modulation(SM) has recently emerged as a new transmission method. In this paper, in order to improve the security in SM-MIMO, a physical layer encryption approach named chaotic antenna-index three-dimensional modulation and constellation points rotated(CATMCPR) encryption scheme is proposed, which utilizes the chaotic theory and spatial modulation techniques. The conventional physical-layer encryption in SM-MIMO suffers from spectral efficiency(SE) performance degradation and usually needs a preshared key, prior channel state information(CSI) or excess jamming power. By contrast, we show that the CATMCPR scheme can not only achieve securely communication but also improve above drawbacks. We evaluate the performances of the proposed scheme by an analysis and computer simulations.展开更多
文摘SAN(System Area Network)within cluster brings high bandwidths and low latencies to IPC(Inter-Process Communication). However,the communication performance has not been able to makefull use of these hardware improvements due to many software overheads. To address this problem,In-tel Corporation,Compaq Computer Corporation, and Microsoft Corporation jointly authored the VIA (Virtual Interface Architecture)specification.As an industrial standard of ULN(User-Level Networking),Ⅵ Architecture defines a set of data operations for message passing, to achieve high-bandwidth, low-latency communication between any couple nodes within cluster ,as well as minimize CPU cycles. VIA gives direct access to network inter-face,bypasses operating system in memory region protected mode ,avoid copies of data during message passing ,and avoid interrupts and context switches if possible.This article describes the principles and mechanism of the Ⅵ Architecture and THVIA.
基金supported in part by the National Natural Science Foundation of China under Grant 61502518,61372098 and 61702536
文摘Massive multiple input and multiple output(MIMO) is a key technology of the fifth generation(5 G) wireless communication systems, which brings various advantages, such as high spectral efficiency and energy efficiency. In MIMO system, spatial modulation(SM) has recently emerged as a new transmission method. In this paper, in order to improve the security in SM-MIMO, a physical layer encryption approach named chaotic antenna-index three-dimensional modulation and constellation points rotated(CATMCPR) encryption scheme is proposed, which utilizes the chaotic theory and spatial modulation techniques. The conventional physical-layer encryption in SM-MIMO suffers from spectral efficiency(SE) performance degradation and usually needs a preshared key, prior channel state information(CSI) or excess jamming power. By contrast, we show that the CATMCPR scheme can not only achieve securely communication but also improve above drawbacks. We evaluate the performances of the proposed scheme by an analysis and computer simulations.
