光移动回程小蜂窝面临的挑战及解决方案

随着移动宽带服务需求不断增加,需要运营商提供更多的无线接入网络功能。LTE和小蜂窝可提供解决无限覆盖和容量的方案。然而,回程技术在CAPEX方面昂贵,运营成本及传统的解决方案无法提供必要的结合能力和成本效率。文中定义了一个Q带点对多点的回程架构,重点介绍了在构建移动回程和无线接入网络框架中提出的萨拉班德结构,其是一种具有成本效益的网络结构,可提供多千兆能结合在Q带传输一个点对多点毫米波传输技术。此外,文中除了给出网络结构的定义外,还描述了节点的密钥类型,包括萨拉班德具体结构。     

A genetic algorithm for vehicle routing with backhauling

In this paper, a greedy route construction heuristic for a vehicle routing problem with backhauling is described. This heuristic inserts customers one by one into the routes using a fixed a priori ordering of customers. Then, a genetic algorithm is used to identify an ordering that produces good routes. Numerical comparisons are provided with an exact algorithm and with other heuristic approaches.     

Use cases and scenarios of 5G integrated satellite‐terrestrial networks for enhanced mobile broadband: The SaT5G approach

This paper presents initial results available from the European Commission Horizon 2020 5G Public Private Partnership Phase 2 project “SaT5G” (Satellite and Terrestrial Network for 5G). 1 After describing the concept, objectives, challenges, and research pillars addressed by the SaT5G project, this paper elaborates on the selected use cases and scenarios for satellite communications positioning in the 5G usage scenario of enhanced mobile broadband.     

Decentralized beamforming design and power allocation for limited coordinated multi-cell network

Multi-cell processing （MCP） is capable of providing significant performance gain, but this improvement is accompanied by dramatic signaling overhead between cooperative base stations. Therefore, balancing the performance gain and overhead growth is crucial for a practical multi-base cooperation scheme. In this paper, we propose a decentralized algorithm to jointly optimize the power allocation and beamforming vector with the goal of maximizing the system performance under the constraint of limited overhead signal and backhaul link capacity. In particular, combined with calculating the transmission beamforming vector according to the local channel state information, an adaptive power allocation is presented based on the result of sum capacity estimation. Furthermore, by utilizing the concept of cell clustering, the proposed framework can be implemented in a practical cellular system without major modification of network architecture. Simulation results demonstrate that the proposed scheme improves the system performance in terms of the sum capacity and cell-edge capacity.     

WiSE – a satellite‐based system for remote monitoring

Recent technological advancements in sensors, processors and communications technology make it viable to perform digital acquisition of environmental data from remote locations. Declining costs and miniaturisation of electronics and sensors have enabled design of systems for intelligent remote monitoring. These advances pave the way for new tools to support field work by virtually extending researchers' reach to the field study area from the comfort of their offices. The Wireless Internet Sensing Environment project developed an architecture providing control and retrieval of data from networked sensors and cameras at a remote location using Internet backhaul. Satellite connectivity enabled this equipment to be deployed to remote locations to support an ecological application. This paper describes architecture and innovative design features for this challenging problem space, including motion event detection, power management and a method to upload collected data. © 2016 The Authors. International Journal of Satellite Communications and Networking published by John Wiley & Sons Ltd.     

从3G无线网络看IP化回传网络需求

本文从无线网络特点的角度出发,从网络使用者最熟悉的GSM对传输网络的需求分析着手,分析了无线网络的基本特征对传输网络的需求。通过对比3G包括IP化在内的不同于GSM的新需要,提出在3G的回传网络上,哪些功能与性能是必须借鉴2G传送网的,哪些是必须在2G回传网络上提升的。基于以上分析,对于业界呼声很高的PTN产品,给出有利于现网平滑演进的PTN网络所必须具备的功能模型。