The End-to-End Reconfigurability(E2R)project aims at realizing the convergence of the heterogeneous radio networks and the optimal utilization of the radio resources.With the continuous development of E2R technology a...The End-to-End Reconfigurability(E2R)project aims at realizing the convergence of the heterogeneous radio networks and the optimal utilization of the radio resources.With the continuous development of E2R technology and cognitive theory,the evolution from existing radio networks to future reconfigurable radio networks with the cognitive ability becomes possible.Nowadays the research aspects of E2R include the system architecture of reconfigurable radio networks and some key technologies for their evolution.展开更多
As an important branch of telecommunication technology,digital home networks have quickly developed in recent years.Although architecture of the digital home network based on telecommunication networks has been standa...As an important branch of telecommunication technology,digital home networks have quickly developed in recent years.Although architecture of the digital home network based on telecommunication networks has been standardized in China,only wireless access is defined to be allowable.Therefore,it becomes the focus of further research how to establish a wireless digital home network.This article proposes the concept and shows the architecture of ubiquitous access for wireless digital home networks.Moreover,key technologies for ubiquitous access are discussed here,including cognitive radio,the concept of wireless Mesh,generic link transfer mechanism,Quality of Service(QoS)guarantee mechanism,Electromagnetic Compatibility(EMC)and coexistence of heterogeneous systems.展开更多
The continuous increase of data transmission density in wireless mobile communications has posed a challenge to the system performance of Wireless Mesh Networks(WMNs).There is a rule for wireless Ad hoc networks that ...The continuous increase of data transmission density in wireless mobile communications has posed a challenge to the system performance of Wireless Mesh Networks(WMNs).There is a rule for wireless Ad hoc networks that the average node capacity decreases while the number of nodes increases,so it is hard to establish a large-scale wireless Mesh network.Network scalability is very important for enhancing the adaptive networking capability of the wireless Mesh network.This article discusses key scalability technologies for Mesh Base Stations(BSs)and Mesh Mobile Stations(MSs),such as channel allocation,intelligent routing,multi-antenna,node classification,Quality of Service(QoS)differentiation and cooperative transmission.展开更多
When computers and communication devices are available everywhere in the future,the categories of communication will expand to cover not only the man-man and the man-machine,but also the machine-machine(M2M)communicat...When computers and communication devices are available everywhere in the future,the categories of communication will expand to cover not only the man-man and the man-machine,but also the machine-machine(M2M)communication.Someday,the traffic generated by machines will greatly exceed those of man-machine and man-man applications.Large numbers of M2M applications will need various wireless networks to support them.This paper introduces the characteristics,advantages and disadvantages of the currently available various wireless network technologies,including WiFi,Bluetooth,ZigBee,passive RFID and the 802.15 standard networks.展开更多
The publication of Tsinghua Science and Technology was started in 1996. Since then, it has been an international academic journal sponsored by Tsinghua University and published bimonthly. This journal aims at presenti...The publication of Tsinghua Science and Technology was started in 1996. Since then, it has been an international academic journal sponsored by Tsinghua University and published bimonthly. This journal aims at presenting the state-of-art scientific achievements in computer science, and other IT fields, and is currently indexed by Ei and other abstracting indices. From year 2013, the journal will be available for open access through IEEE Xplore Digital Library. This year＇s special section on Wireless Computing and Networking of Tsinghua Science and Technology is devoted to gather and present new research that address the challenges in the broad areas of Wireless Networks, Sensor Networks, Wireless Computing and Communication. While Wireless Networks have great potential to provide heterogeneous access and services for ubiquitous users, the demanding communication environment of wireless networks imposes challenges to many interesting research topics, such as channel estimation, communication protocol design, resource management, system design and so on. In Wireless Network research, it is unavoidable to wrestle unique problems such as non-uniform spectrum allocation, various radio resource management policies, economic concerns, the scarcity of radio resources, and user mobility. This Special Section therefore aims to publish high quality, original, unpublished research papers in the broad area of Wireless Computing and Networking, and thus presents a platform for scientists and scholars to share their observations and research results in the field. Specific topics for this special section include but are not limited to：展开更多
基金supported by the National Natural Science Foundation of China under Grant No.60632030the E3 Project(FP7-ICT-2007-216248)with in Community’s Seventh Framework Program.
文摘The End-to-End Reconfigurability(E2R)project aims at realizing the convergence of the heterogeneous radio networks and the optimal utilization of the radio resources.With the continuous development of E2R technology and cognitive theory,the evolution from existing radio networks to future reconfigurable radio networks with the cognitive ability becomes possible.Nowadays the research aspects of E2R include the system architecture of reconfigurable radio networks and some key technologies for their evolution.
文摘As an important branch of telecommunication technology,digital home networks have quickly developed in recent years.Although architecture of the digital home network based on telecommunication networks has been standardized in China,only wireless access is defined to be allowable.Therefore,it becomes the focus of further research how to establish a wireless digital home network.This article proposes the concept and shows the architecture of ubiquitous access for wireless digital home networks.Moreover,key technologies for ubiquitous access are discussed here,including cognitive radio,the concept of wireless Mesh,generic link transfer mechanism,Quality of Service(QoS)guarantee mechanism,Electromagnetic Compatibility(EMC)and coexistence of heterogeneous systems.
基金funded by Special Standardization Foundation of the Science and Technology Commission of Shanghai Municipality under Grant 07DZ05018the Natural Science Foundation of Shanghai Municipality under Grant 07ZR14104
文摘The continuous increase of data transmission density in wireless mobile communications has posed a challenge to the system performance of Wireless Mesh Networks(WMNs).There is a rule for wireless Ad hoc networks that the average node capacity decreases while the number of nodes increases,so it is hard to establish a large-scale wireless Mesh network.Network scalability is very important for enhancing the adaptive networking capability of the wireless Mesh network.This article discusses key scalability technologies for Mesh Base Stations(BSs)and Mesh Mobile Stations(MSs),such as channel allocation,intelligent routing,multi-antenna,node classification,Quality of Service(QoS)differentiation and cooperative transmission.
文摘When computers and communication devices are available everywhere in the future,the categories of communication will expand to cover not only the man-man and the man-machine,but also the machine-machine(M2M)communication.Someday,the traffic generated by machines will greatly exceed those of man-machine and man-man applications.Large numbers of M2M applications will need various wireless networks to support them.This paper introduces the characteristics,advantages and disadvantages of the currently available various wireless network technologies,including WiFi,Bluetooth,ZigBee,passive RFID and the 802.15 standard networks.
文摘The publication of Tsinghua Science and Technology was started in 1996. Since then, it has been an international academic journal sponsored by Tsinghua University and published bimonthly. This journal aims at presenting the state-of-art scientific achievements in computer science, and other IT fields, and is currently indexed by Ei and other abstracting indices. From year 2013, the journal will be available for open access through IEEE Xplore Digital Library. This year＇s special section on Wireless Computing and Networking of Tsinghua Science and Technology is devoted to gather and present new research that address the challenges in the broad areas of Wireless Networks, Sensor Networks, Wireless Computing and Communication. While Wireless Networks have great potential to provide heterogeneous access and services for ubiquitous users, the demanding communication environment of wireless networks imposes challenges to many interesting research topics, such as channel estimation, communication protocol design, resource management, system design and so on. In Wireless Network research, it is unavoidable to wrestle unique problems such as non-uniform spectrum allocation, various radio resource management policies, economic concerns, the scarcity of radio resources, and user mobility. This Special Section therefore aims to publish high quality, original, unpublished research papers in the broad area of Wireless Computing and Networking, and thus presents a platform for scientists and scholars to share their observations and research results in the field. Specific topics for this special section include but are not limited to：
