B3G无线通信中合作网络的一种新型无线接入方案

The paper discusses the signifi cance and development foreground of co-operation among heterogeneous networks in composite radio context for B3G wireless communications. The concept of composite reconfigurable wireless network is introduced in the paper, and the development of future wireless communication systems is also discussed. The basic confi guration framework of the network interoperation is given, and the functions of important parts are analyzed. A management platform for co-operation between WLAN...     

Service configuration and traffic distribution in composite radio environments

This paper adopts the assumption that cellular, broadband fixed wireless access (BFWA), wireless local area networks (WLAN), and digital video broadcasting (DVB) systems can be co-operating components of a composite-radio infrastructure. It is believed that through the composite radio concept, operators will be enabled to offer efficient, in terms of cost and QoS, wireless access to broadband IP-based services. The exploitation of this infrastructure calls for the application of computational intelligence (CI) technologies for the development of appropriate, sophisticated service and network resource management functionality. In this context, this paper identifies and addresses the important problem of service configuration and distribution in a composite radio environment (SCD-CRE). The problem's objective is to determine the best way to accommodate a demand volume, with which the composite radio infrastructure is faced. The pro finds the QoS levels that can be offered, and the networks that can support the demand at the selected QoS levels. The paper includes a first approach to the definition, mathematical formulation, and solution of a version of the SCD-CRE problem. Results indicating some of the capabilities of the SCD-CRE are also presented. Further application fields for CI technologies are indicated, in the area of the necessary reconfiguration of the managed, radio and fixed, network segments.     

端到端重配置技术研究

端到端重配置技术起源于软件无线电,软件无线电技术实现了终端的多模式支持功能,并实现了软件从空中接口的下载.端到端重配置技术利用软件无线电提供的重配置能力,构建起以可重配置的终端、基站等网元为主体的体系结构,结合先进的动态网络规划、灵活频谱管理和联合无线资源管理技术,实现对重配置能力和异构无线资源的有效利用,保证用户的无缝业务体验.本文论述了端到端重配置技术的产生背景、基本概念和研究现状,对重配置研究中的主要问题和关键技术(包括架构、规划和管理等方面的内容)进行了系统的总结,最后就重配置未来研究的重点提出了自己的看法.     

Distributed radio access technology selection for adaptive networks in high‐speed,B3G infrastructures

Wireless systems migrate towards the era of ‘Beyond the 3rd Generation’ (B3G). A fundamental facilitator of this vision is the evolution of high speed, adaptive networks, needed for better handling the offered demand and improving resource utilization. Adaptive networks dynamically select their configuration, in order to optimally adapt to the changing environment requirements and conditions. This paper presents optimization functionality that can be used to support network adaptability (cognition‐reconfigurability) in a B3G context. The paper starts from the business case that justifies the need for placing research onto adaptive networks and then continues with the management functionality for (re)configuration decisions, which is targeted to the dynamic selection of the appropriate radio access technologies (RATs). RAT selection is modelled through an optimization problem called (RAT, Demand and QoS‐Assignment problem—RDQ‐A), the solution of which assigns in a distributed manner the available RATs to adaptive Base Station transceivers and the demand (users) to these transceivers and to QoS levels, respectively. The RDQ‐A optimization problem is decoupled in several sub‐problems and is implemented in phases corresponding to the aforementioned assignments, while efficient custom greedy algorithms are mobilized in each phase for obtaining the optimum assignment. Finally, indicative results from the application of the proposed functionality to a simulated network are presented. Copyright © 2006 John Wiley & Sons, Ltd.     

The European project trust—reconfigurable terminals and supporting networks

To date, research into reconfigurable mobile communications has predominantly focussed on the software radio concept, and specifically on the hardware technologies required to move physical layer processing into a programmable environment [1, 2, 3]. Although an interesting and necessary challenge, this only represents a fraction of the overall support and technology required to realise the potential of the concept. Other necessary developments include network/terminal cooperation for seamless inter-standard handoff, QoS management for software download and reconfiguration, a secure software download mechanism, terminal software and mobile radio network architecture supporting terminal reconfiguration, management for software downloads, configuration management, capability negotiation, radio resource management and spectrum allocation policies etc… This paper describes results from the EuropeanIst Trust (Transparently Reconfigurable UbiquitouS Terminal) [4] project concerning user and operator requirements, the proposed overall system environment, security issues, concerted radio resource management, and expected time frame for the development of reconfigurable terminals.     

UMTS radio network planning — maximizing return on investment

This article describes, based on the fundamentals of GSM radio network planning, the process of planning and optimizing UMTS networks. It highlights the key differences to existing 2G technologies and explains why UMTS radio network optimization is so complex that it cannot be done manually any more. This article gives some examples of cost efficient UMTS radio network enhancements in order to maximize future network capacities. It explains how UMTS return on investment is influenced by using advanced methods for radio network planning and optimization.     

A Real Time Emulator Demonstrating Advanced Resource Management Solutions

The E2R-II prototyping environment, as part of the E2R-II project, is a framework that pretends to demonstrate the most promising radio resource management proposals that are developed within the project. Such demonstrations have been based on a dedicated proof-of-concept environment, which serves for validating the work in the areas of cognitive networks, reconfigurable terminals, enhanced radio resource and spectrum efficiency, and dynamic and robust reconfigurations. In this framework, this paper presents a real time demonstrator running IP-based applications for the validation of ASM/JRRM algorithms. Such a demonstrator tries to reproduce in a realistic way a B3G heterogeneous radio access network, which considers different RATs (UTRAN, GERAN, WLAN), interfacing a common Core Network. This demonstrator serves for testing the ASM/JRRM strategies that are proposed within the E2R project. In addition, the E2R ASM/JRRM demonstrator incorporates the capacity to evaluate the QoS experienced by the user when using real applications under controlled conditions of the used RAT and the CN.     

Terminal-centric view of software. reconfigurable system architecture and enabling components and technologies

Reconfigurable radio in Europe is rapidly gaining momentum and becoming a key enabler for realizing the vision of being optimally connected anywhere, anytime. At the center of this exciting technology is the reconfigurable terminal that will move across different radio access networks, adapting at every instant to an optimum mode of operation. This will require coordinated reconfiguration management support from both the terminal and the network, but the terminal will inherit a significant part of this intelligence. This article focuses on a novel reconfigurable terminal architecture that advances the state of the art and encompasses the overall protocol stack from the physical to application layer in IP-based radio access networks. The proposed architecture is composed of a terminal reconfiguration management part and enabling middleware technologies like the complementary Distributed Processing Environment and agent platforms, flexible protocol stacks that can flexibly be interchanged to support different wireless technologies and associated mechanisms, and finally, object-oriented reconfigurable RF and baseband components. The work presented in this article is conducted in the context of the IST projects SCOUT (www.ist-scout.org) and TRUST (www4.in.tum.de/-scout/trust webpage/spl I.bar/src/ trust frameset.html) of the European 5th Framework Program.     

Alternatives for mobile operators in the competitive 3G and beyond business

The importance of analyzing different business models and technologies in the mobile industry has become more crucial for the investment policy of the telecom operators. This paper aims to cover some of the most interesting business alternatives in providing the new 3G and beyond services including cases where the operator already has an existing second-generation cellular network and perhaps even a license for the 3G UMTS network, and cases where the operator does not have any existing network. Three cases for incumbents and new entrants are foreseen, leaving alternatives for new competing 3G technology deployment or acting as a mobile virtual network operator (MVNO) without owning any radio infrastructure. A techno-economic approach has been used to identify business opportunities and quantify the potential profitability of different kind of business players. The scenarios have been analyzed in the Western European context by different country groups that are not exactly representative of any defined country, but rather share typical demographic characteristics.     

Architecture and enablers for optimized radio resource usage in heterogeneous wireless access networks: The IEEE 1900.4 Working Group

Over the past decade or so, the wireless industry has undergone many significant changes. Radio systems have moved toward forming heterogeneous wireless networks: collaborations of multiple radio access networks, which in some cases operate different radio access technologies, such as second- and third-generation cellular RATs, IEEE 802.x wireless standards, and so on. On the other hand, multimode reconfigurable user devices with the ability to choose among various supported RATs have become a reality, and devices and networks with dynamic spectrum access capabilities, allowing real-time sharing of spectrum resource usage among different systems, are expected to be a part of the future radio eco-space. As a result of these changes, there is a need to develop a standard that addresses the requirements and leverages the opportunities posed by such a versatile radio environment. To this end, IEEE 1900.4 aims to standardize the overall system architecture and information exchange between the network and mobile devices, which will allow these elements to optimally choose from available radio resources. In other words, the standard facilitates the distributed dynamic optimization of the usage of spectrum offered by the heterogeneous wireless network, relying on a collaborative information exchange between networks and mobile devices, thereby acting as a common means to improve overall composite capacity and quality of service for the served networks. This article provides a snapshot of IEEE P1900.4 in its current form, covering the scope and purpose of the standard, reference use cases for which the standard is applicable, its system and functional architectures, and finally, the information model for its main interfaces.     

5G网络传输解决方案

随着网络强国战略的推进,我国5G网络加快了建设步伐,传输网作为5G网络的基础,快速重构一张满足5G业务发展需求的传输网显得非常重要,5G网络业务的差异化需求带来传输网重构,5G传输新技术手段为5G传输网重构提供了支撑,在5G传输网解决方案原则基础上进行分阶段部署及重构5G传输网络,对减少投资加快5G网络建设和保障5G基站安全运行将起到重要作用。     

可变带宽光网络：提出、优势和关键技术

新型互联网业务迅速发展。使网络流量急剧增长,推动了对光通信容量的需求。同时,新型的互联网应用对带宽的需求具有不可预测性。这两方面因素驱动光网络朝着灵活、动态、高效的方向发展。可变带宽光网络可以在收发端根据传输距离、链路质量、业务需求动态调整传输速率、调制格式以匹配网络实际需求,提高了网络灵活性和网络生存性。可变带宽光网络关键技术包括可变带宽可重构光分插复用器、可变带宽收发机技术、可变带宽的电层技术和可变带宽管控层技术。     

多模可重构终端的无线接入管理

本文给出了多模可重构终端(RT)的概念,并且设计了RT的基本功能结构模型,使其能够与各类异种无线接入网络(RANs)进行通信.文中针对RT如何选择RANs和无线接入技术(RATs)的问题,提出了一种具体的解决方案.该方案由终端和无线接入网络分工合作完成,终端方面是建立或者改变连接的发起方,负责与本地无线环境密切相关的信息处理,向网络传递用户需求等通信参数.文中通过RT接入管理的三层贝叶斯网络运算模型来实现上述功能.网络方面负责解决网络间合作的问题,拥有选择RANs和RATs的最终决策权.文中给出了网络方面为RT选择最佳RATs的流程图和算法.最后,仿真结果验证了上述方案的有效性.     

5G边缘计算和网络切片技术

由于能够以低成本提供5G无线网络中多样化的业务场景,网络切片和边缘计算一直以来深受学术界和工业界的提倡.网络切片通过将网络实体划分成多个逻辑独立网络,为不同业务场景提供所需服务,而边缘计算利用网络中用户和边缘网络设备的计算和存储功能,承载部分核心节点中的控制、管理、业务功能,能够提升传统移动宽带业务能力和应对新兴的机器类业务.将网络切片和边缘计算融合,提出了基于边缘计算的接入网络切片,能够满足5G中广泛的用例和商业模型,使得运营商能够根据第三方需求和网络状况以低成本为用户灵活提供个性化的网络服务.     

基于认知的重配置无线网络技术

端到端重配置技术旨在解决异构无线网络融合和无线资源的最优化利用,随着重配置技术研究的发展和认知理论研究的不断深入,使得未来具有认知能力的重配置无线网络的实现成为可能。目前,对端到端重配置技术的研究包括重配置无线网络体系结构及实现向重配置无线网络的演进过程中的关键技术。     

Radio Network Aggregation for 5G Mobile Terminals in Heterogeneous Wireless and Mobile Networks

This paper provides a novel design concept for advanced mobile multi interface terminals with radio network aggregation capability and enhanced quality of service (QoS) provisioning for multimedia services (voice, video and data) in heterogeneous wireless and mobile networks. A new module is established which provides the best QoS and lowest cost for any given multimedia service by using simultaneously all available wireless and mobile access networks for a given traffic flow. This novel adaptive QoS module with adaptive QoS routing algorithm is called advanced QoS routing algorithm (AQoSRA), which is defined independently from any existing and future radio access technology. The performance of our proposal is evaluated using simulations and analysis with multi-interface mobile stations with AQoSRA within, carrying multimedia traffic in heterogeneous mobile and wireless environment with coexistence of multiple Radio Access Technologies, such as 3G, 4G as well as future 5G radio access networks. The analysis of the proposed framework for radio networks aggregation in advanced mobile terminals has shown overall better performances regarding the achievable throughput and multimedia access probability in heterogeneous wireless and mobile environment.     

Evolution toward reconfigurable user equipment

To date, research into reconfigurable mobile communications has predominantly focused on the software radio concept, and specifically on the hardware technologies required to move physical layer processing into a programmable environment. Although an interesting and necessary challenge, this only represents a fraction of the overall support and technology required to realize the potential of the concept. Other necessary developments include network/terminal cooperation for seamless interstandard handoff, QoS management, a secure software download mechanism, terminal software architecture supporting reconfiguration, configuration management, capability negotiation, and so on. Summarizing results from early project deliverables from a European Research project, IST-TRUST (Transparently Reconfigurable Ubiquitous Terminal), this article describes the likely overall system environment and the key technical challenges to be researched for realizing a reconfigurable terminal to meet the needs of users within that environment     

“MeshUp”: Self-organizing mesh-based topologies for next generation radio access networks

The phenomenal growth in wireless technologies has brought about a slew of new services. Incumbent with the new technology is the challenge of providing flexible, reconfigurable, self-organizing architectures which are capable of catering to the dynamics of the network, while providing cost-effective solutions for the service providers. In this paper, we focus on mesh-based multi-hop access network architectures for next generation radio access networks. Using short, high bandwidth optical wireless links to interconnect the various network elements, we propose a non-hierarchical, multi-hop access network framework. We study two generic family of mesh-based topologies: GPeterNet, a graph theoretic framework, and FraNtiC, a fractal geometric architecture, for arbitrary access network deployments. The performance of these topologies is analyzed in terms of different system metrics – topological robustness and reliability, system costs and network exposure due to failure conditions. Our analysis shows that a combination of different mesh-based multi-hop access topologies, coupled with emerging wireless backhaul technologies, can cater carrier-class services for next generation radio access networks, providing significant advantages over existing access technologies.     

Intent-based networks for 6G: Insights and challenges

Intent-Based Networks (IBNs), which are originally proposed to introduce Artificial Intelligence (AI) into the sixth-generation (6G) wireless networks, can effectively solve the challenges of traditional networks in terms of efficiency, flexibility, and security. IBNs are mainly used to transform users’ business intent into network configuration, operation, and maintenance strategies, which are prominent for designing the AI-enabled 6G networks. In particular, in order to meet the massive, intelligent service demands and overcome the time-varying radio propagation, IBNs can continuously learn and adapt to the time-varying network environment based on the massive collected network data in real-time. From the aspects of both the core network and radio access network, this article comprehensively surveys the architectures and key techniques of IBNs for 6G. In particular, the demonstration platforms of IBNs, such as the Apstra Operating System, Forward Networks Verification Platform, and One Convergence Service Interaction Platform, are presented. Moreover, the industrial development of IBNs is elaborated, including the emerging new products and startups to solve the problems of open data platforms, automated network operations, and preemptive network fault diagnosis. Finally, several open issues and challenges are identified as well to spur future researches.