Nýting ljósleiðara á Íslandi

2017 ◽  
Vol 23 ◽  
pp. 32-36
Author(s):  
Sæmundur E. Þorsteinsson
Keyword(s):  
Mobile Communication ◽  
Rural Areas ◽  
Communication Systems ◽  
Access Network ◽  
Access Networks ◽  
Optical Fibres ◽  
Core Network ◽  
Leading Role ◽  
Telecommunication Systems ◽  
Optical Ring

General deployment of optical fibre technology commenced in the eighties. Its introduction revolutionised the telecommunications arena and has become the foundation of most telecommunication systems in use today. Optical fibres connect continents and countries, are used in core and access networks and for backhauling of mobile communication systems. The internet would barely exist without optical fibres and globalisation would hardly have seen the dawn of light. Three submarine optical cables connect Iceland to the outside world; Farice and Danice connect Iceland to Europe and Greenland Connect to America via Greenland. The optical ring around Iceland constitutes the Icelandic core network. The ring passes by nearly all villages and towns and fibre deployment in the access network has reached an advanced state. Fibre deployment in rural areas has already begun and will presumably be finished in a few years. Iceland plays a leading role in fibre deployment. In this paper, fibre utilisation in Iceland will be described, both in core and access networks. Three different architectures for fibre deployment in the access network will be described. Competition on fibre networks will also be discussed.

RoF-Based Radio Access Network for 5G Mobile Communication Systems in 28 GHz Millimeter-Wave

2020 ◽  
Vol 38 (2) ◽  
pp. 409-420 ◽  
Author(s):  
Minkyu Sung ◽  
Joonyoung Kim ◽  
Eon-Sang Kim ◽  
Seung-Hyun Cho ◽  
Young-Jun Won ◽  
...  
Keyword(s):  
Millimeter Wave ◽  
Mobile Communication ◽  
Communication Systems ◽  
Access Network ◽  
Mobile Communication Systems ◽  
Radio Access Network ◽  
Radio Access ◽  
5G Mobile Communication

scholarly journals Optimizing allocation and positioning in a disaggregated radio access network

2019 ◽  
Author(s):  
Felipe Freitas Fonseca ◽  
Sand Luz Correa ◽  
Kleber Vieira Cardoso
Keyword(s):  
State Of The Art ◽  
Access Network ◽  
Access Networks ◽  
Core Network ◽  
Improve Performance ◽  
The Core ◽  
Radio Access ◽  
Network Functions ◽  
Feasible Solutions ◽  
Communication Paths

Future wireless communication infrastructures, starting from 5G, will operate their radio access networks (RANs) based on virtualized functions distributed over a crosshaul, i.e., a transport solution integrating fronthaul and backhaul. Optimizing the resource allocation and positioning of the virtual network functions of a virtualized RAN (vRAN) is crucial to improve performance. In this paper, we propose a new optimization model to deal with VRAN functions allocation and positioning that seeks to maximize the level of centralization. Our model explores several representative functional splits, including the fully distributed remote unit (UK), while taking into account the limit imposed by the communication paths between the crosshaul and the core network. We compare our model with a state-of-the-art solution and show how our approach improves the centralization level in most of the scenarios, even considering the limit imposed by the core infrastructure. Our model also provides higher number of feasible solutions in most of the cases. Additionally, we investigate the positioning of the central unit (CU) and show that its placement with the core infrastructure is rarely the best choice.

Cloud-integrated wireless-optical broadband access network with survivability

2020 ◽  
Vol 10 ◽  
Author(s):  
Sangita Solanki ◽  
Raksha Upadhyay ◽  
Uma Rathore Bhatt
Keyword(s):  
Access Network ◽  
Access Networks ◽  
Manhattan Distance ◽  
Broadband Access ◽  
Optical Access Networks ◽  
Component Level ◽  
Backup Path ◽  
Wireless Router ◽  
Path Computation ◽  
Broadband Access Network

Cloud-integrated wireless optical broadband (CIW) access networks inheriting advantages of cloud computing, wireless and optical access networks have a broad prospect in the future. Due to failure of components like OLT level, ONU level, link or path failure and cloud component level in CIW, survivability is becoming one of the important issues. In this paper, we have presented cloud-integrated wireless-optical broadband access network with survivability using integer linear programming (ILP) model, to minimize the number of cloud components while providing maximum backup paths. Hence, we have proposed protection through cloud-integrated wireless router to available ONUs (PCIWRAO). So, evaluated the backup path computation. We have considered ONU level failure in which the affected traffic is transferred through wireless routers and cloud component to the available ONUs using Manhattan distance algorithm. Simulation results show different configurations for different number of routers and cloud components illustrating available backup path when ONU fails.

Code-aided adaptive equaliser for mobile communication systems

1998 ◽  
Vol 34 (17) ◽  
pp. 1638 ◽  
Author(s):  
S. Tantikovit ◽  
A.U.H. Sheikh ◽  
M.Z. Wang
Keyword(s):  
Mobile Communication ◽  
Communication Systems ◽  
Mobile Communication Systems

scholarly journals Policy Strategies to Revive Rural Land in Peri-Metropolitan Towns: Resource Identification, Capitalization, and Financialization

Land ◽  
2021 ◽  
Vol 10 (2) ◽  
pp. 132
Author(s):  
Wei Li ◽  
Zhanwei Zhang ◽  
Yang Zhou
Keyword(s):  
Rural Areas ◽  
Master Planning ◽  
Leading Role ◽  
Multifunctional Land Use ◽  
Key Stakeholders ◽  
Resource Identification ◽  
The Government ◽  
Interpretative Approach ◽  
The Town

Previous planning for rural revival in towns has emphasized construction and government-led policies. However, we argue that the dilemmas of peri-metropolitan rural areas, such as Desakota in China, are far more complex faced with rural super village and hollowed village transformations. Rural revival planning needs to coordinate with the development of urbanized and rural areas towards multifunctional goals and plans as a whole. Therefore, we selected the town master plan of Lijia, a typical peri-metropolitan village in China, as a case study. Through a historical–interpretative approach involving analysis of planning policies, questionnaires, and in-depth interviews with the key stakeholders involved, we structured the process and mechanism of rural revival in Lijia into three phases: resource identification, capitalization, and financialization. In different phases, different stakeholders adopt different roles. The government takes a leading role in resource identification and capitalization, while firms take a leading role in the process of financialization. “Market-dominant and government-guided” planning stimulates villagers to participate in rural revival. We highlight the importance of multifunctional land-use in terms of rural revival in the master planning of peri-metropolitan villages and provide a practical reference for uniting multiple stakeholders, including governments, firms, and villagers.

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