城市的网络优势——中国互联网骨干网络结构与节点可达性分析
收稿日期: 2005-04-08
修回日期: 2005-09-19
网络出版日期: 2006-04-15
基金资助
国家自然科学基金资助项目(40171030);华东师范大学2004年优秀博士生培养基金资助
The network advantage of cities: an analysis of spatial structure and node accessibility of Internet backbones in China
Received date: 2005-04-08
Revised date: 2005-09-19
Online published: 2006-04-15
汪明峰, 宁越敏 . 城市的网络优势——中国互联网骨干网络结构与节点可达性分析[J]. 地理研究, 2006 , 25(2) : 193 -203 . DOI: 10.11821/yj2006020002
The rise of information economy has restructured the competitive advantage of cities in many ways in which cities rise and fall in the global economy.Although the bubble of New(Digital) Economy has collapsed,Internet continues to be a driving force in many places.In these local economies,the leading infrastructure is not highways,ports,rail-ways,or airports,but fiber optic glass network connected around the world.With rapid advances in Internet technology,the spatial framework of telecommunication infrastructure has also been developed rapidly China during the last decade.However,little advances in academic research on Internet,especially the relationships between cities and Internet,are still neither achieving the attention it deserves,nor delivering the quality of empirical research it demands.This paper aims to fill the gap.Firstly,it presents a literature review of communication networks and urban system and recent efforts to measure their structure and performance.Secondly,this paper applies network analysis methods to evaluate Internet connectivity,focusing on the spatial structure and city accessibility of five major Internet backbones in China.The overall Internet infrastructure within China is illustrated in light of the calibration of basic graph-theoretic measures based on gross characteristics.The degree of connectivity of cities included in the networks is measured with the total accessibility matrix(T) and the Shimbel distance matrix(D).The results reveal the construction of new accessibility of cities follows the traditional urban hierarchy.The three national network access points(NAPs) Beijing,Shanghai,and Guangzhou and several regional hub cities are near the top of the accessibility hierarchy.In addition,geographical location of cities plays an important role in the decision-making of infrastructure constructions.Finally,several new themes for further research are highlighted.
Key words： Internet; network analysis; spatial structure; node accessibility; urban hierarchy
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