共查询到20条相似文献,搜索用时 656 毫秒
1.
2.
3.
4.
面向空天地一体化网络的移动边缘计算技术 总被引:1,自引:0,他引:1
《无线电通信技术》2021,(1):27-35
空天地一体化通信网络是未来6G移动通信系统的重要发展趋势,能真正实现全球全域的"泛在连接"。考虑到空天地一体化网络的多层异构性,引入移动边缘计算(Mobile Edge Computing, MEC)技术可为用户提供各种数据业务计算服务的支持。首先,对空天地一体化网络中的天基网络、空基网络、地基网络以及MEC技术分别进行了概述,并讨论了引入MEC技术对空天地一体化网络带来的优势。其次,分别对低轨(Low Earth Orbit, LEO)卫星-MEC融合网络架构、高空平台(High Attitude Platforms, HAPs)-MEC融合网络架构、无人机(Unmanned Aerial Vehicle, UAV)-MEC融合网络架构以及空天地一体化网络(Space-Air-Ground Integrated Network, SAGIN)-MEC融合网络架构进行了介绍,并讨论了这4种架构的应用场景。最后,探讨了空天地一体化网络架构中安全性、移动性管理等关键性挑战问题。 相似文献
5.
卫星互联网技术通过卫星提供互联网接入服务,满足地面蜂窝网络尚未覆盖地区的通信需求。本文详细介绍了卫星互联网的发展、NTN非地面网络技术标准进展、透明载荷与再生载荷两种网络架构,以及NTN技术目前面临的挑战。这些信息为进一步研究空天地一体化和提升偏远地区用户广播电视观看和通信体验奠定了基础。 相似文献
6.
随着地面以太网组网技术的快速发展及广泛应用,空间通信与地面网络融合技术成为未来空间通信发展的必然趋势。目前,地面测控通信系统已实现基于网络的数据传输,但航天器内部数据传输仍以总线或点对点通信方式为主。若航天器内部设备之间信息交互采用组网技术,与地面网络实现一体化通信,可统一航天器内部和地面的通信协议,提高天地通信效率。相比于地面网络环境,航天器天地传输链路具有时延长、带宽有限、双向链路带宽不平衡以及航天器内部电磁环境复杂等特点,直接应用地面组网技术会存在天地一体化网络通信效率低、可靠性差等问题。为此,文中提出一种空间高效可靠的组网方案,构建以空间以太网交换机、天地网关为核心的航天器网络通信系统,并对地面网络协议进行改进和优化,实现航天器高效可靠的天地一体化网络通信。 相似文献
7.
通信、网络、计算融合的天地一体化信息网络体系架构研究 总被引:1,自引:0,他引:1
随着人类活动范围从大陆向海洋、太空的不断扩展,世界各国纷纷开始布局全球无缝覆盖、连接无处不在的天地一体化信息网络建设。天地一体化信息网络是天基网络与地面网络的深度融合,不是简单的地面向空间的拓展与叠加。从融合的角度出发,首先梳理了地面互联网、移动通信网、天基信息网络发展现状以及存在的问题与挑战;然后总结分析了天地一体化信息网络体系架构研究现状以及新型网络架构向云化、智能化发展的趋势;最后提出了通信、网络、计算融合的天地一体化信息网络的体系架构,并从物理架构、功能架构、物理与功能架构映射等多个维度进行了阐述,提出了一体化信息通信系统、一体化网络系统、一体化信息系统的3层功能架构模型,以期为后续天地一体化信息网络的研究、建设和标准化提供有价值的建议和参考。 相似文献
8.
面对不断增长的算力和网络需求,6G空天地一体化网络通过网络集群优势突破单点算力和传统网络传输的极限,形成以算为中心,以网为根基,云、边、端、网、数、算深度融合的新型空天地一体化算力融合网络。首先介绍了算力网络和空天地一体化网络的发展现状,并结合6G空天地一体化算力融合网络的需求提出了星算网络的概念。其次,对星算网络的分层系统架构中的空基网络、天基网络和地面网络进行描述,并提出由算网资源层、算网抽象层和算网编排层组成的逻辑架构。之后,针对未来星算网络面临的算存问题、可信传输问题、天基算力编址寻址和高移动性算力路由问题提出对应关键使能技术。最后,对星算网络的典型应用场景进行了讨论和展望。 相似文献
9.
10.
随着互联网从消费型网络向生产型网络升级,新兴行业应用需要差异化的确定性服务质量保障以及全时空范围的通信能力。如何实现泛在多域网络的异构兼容,支持空天地一体化网络(SAGIN)节点间的确定性传输成为当前的重要研究问题。首先分析了面向6G全域新兴应用场景的确定性服务质量保障需求,然后提出了包含全域协同网络管控层、多域动态确定性融合层、泛在异构确定性组网层的分层空天地一体化确定性网络架构,并研究相应场景的“固移卫”融合确定性网络关键技术,最后研判了空天地一体化确定性网络的挑战和发展趋势。 相似文献
11.
12.
Pacing toward converged voice and data networks, the IP over WDM/OTN network architecture supported by MPLS satisfies the advanced next-generation network requirements to provide fast, reliable and flexible connectivity services. Acknowledging the advantages of networks that utilize the above technologies, operators evolve their networks in that direction, while continuously working to provide new services to attract customers. In their effort to facilitate such services in a flexible and cost-effective way, an integrated network management system for IP and WDM technologies is a prerequisite. This article proposes a management architecture that provides for this integration. Different approaches to integrating multilayer networks are briefly described covering both the control and management planes. The adopted solution is based mainly on the management plane utilizing the control plane wherever possible. Additionally, preliminary results from the evaluation of the configuration management functionality of the proposed system in a testbed environment are presented, concluding with future extensions that also cover fault and performance management. 相似文献
13.
14.
15.
Cuthbert L.G. Henderson N.G. Sapanel J.C. Pitts J.M. Carette D. Keller B. Lyratzis T. Anagnostou M. Maio J. 《Electronics & Communication Engineering Journal》1992,4(6):394-400
The aim of the European Community's RACE programme has been the introduction of integrated broadband communication services throughout the Community by 1995. Project R1022 is tasked with demonstrating the feasibility of a broadband network based on the asynchronous transfer mode (ATM). The authors consider the alternative ways of introducing ATM broadband networks into the existing European communications structure in a cost-effective manner which offers advantages to network operators and end users 相似文献
16.
The CATV network operators hope to offer digital services and evolve their networks to full service networks. There are many hurdles for them at the moment in the transition to a digital network and digital service offering from the current analog-based technology. Key to the success of the transition will be a well-integrated and capable management system to allow CATV operators and service providers to control the network as well as the services they will offer. The CATV operators need to agree on a common data communication infrastructure and plan how their new digital services will be offered to subscribers without disrupting the current customer base of analog service users. The choice of network technology and data communication protocols will have a strong influence on the network management technology chosen. A vital element for the provision of a common open communication architecture as well as for the purposes of network management is that the IP is used. The adoption of existing standards is vital in order to establish a fast route to open network management for CATV networks. It is possible that CATV operators and service providers will have to integrate existing SNMP management systems and TMN/OSI management, with newer integrated service management systems based on TINA and implemented on a CORBA platform. There is a strong need to address security issues before any of these technologies can be deployed for service. There is currently investment (deployed systems and research) which uses each of the technologies mentioned, so these technologies will need to coexist. This article highlights the differences between the North American and European network architectures, and outlines the European network and network management scenario. This is based on the authors involvement in a Pan-European CATV project, Integrated Broadband Communication over Broadcast Networks-IBCoBN 相似文献
17.
由于IPv4地址的短缺,未来网络将向下一代IPv6网络过渡,并且由于IPv4与IPv6的差异,使得这两个网络之间无法互相通信。为在过渡期间,用户能够同时享受IPv4与IPv6两个网络的服务,运营商必须使用IPv4/IPv6网络过渡技术,以达到平滑过渡的目的。文章讨论在教育网中如何通过IPv4/IPv6协议转换技术使IDC机房从IPv4网络平滑过渡到IPv6网络的一个通信场景和解决方案。 相似文献
18.
为使无线个人通信具有较大的系统容量和能灵活地处理多种宽带业务,在未来的个人通信中采用ATM的传输与交换是一种必然的趋势。本文基于ATM网络技术,提出了无线ATM网络协议参考模型和网络实现体系结构,并探讨了在无线通信体制下的集成智能网络协议模式与实用虚拟网络结构。 相似文献
19.
In order to capture and maintain a representative share of the wireless communication market, effective ways to manage the scarce physical resources of cellular networks are fundamental for cellular network operators. In this context, this paper proposes an adaptive Radio Resource Allocation algorithm that targets the user satisfaction maximization in cellular networks with multiple services. The proposed algorithm is mathematically derived from a utility-based cross-layer optimization framework and employs user weights as well as an innovative service weight that is adapted to meet the satisfaction target of the most prioritized service. Furthermore, the proposed algorithm is scalable to several services classes and can be employed in the current and future generations of wireless systems that guarantee orthogonality among the allocable resources. The performance evaluation is conducted in realistic scenarios of the downlink of an Orthogonal Frequency Division Multiple Access based cellular network serving video and Constant Bit Rate flows, where we assume imperfect Channel State Information at the transmitter. Significant gains in the joint system capacity were obtained, demonstrating that the adaptability and service prioritization allow the accomplishment of simultaneously maximizing the user satisfaction for distinct services. 相似文献
20.
随着无线通信技术的不断发展,多接入技术、不同运营商和多样化终端共存的局面使得传统的无线通信格局面临困境,异构网络融合成为未来网络发展的必然趋势。欧盟项目Ambient Networks对异构网络融合进行了深入的研究。Ambient Networks提出了Ambient控制平面(ACS)来支持动态的、分布式的、自管理和自维护的异构网络管理;通过多无线接入结构(MRA)充分利用多种接入技术并存带来的优势,为用户提供总是处于最佳连接的服务。 相似文献