TAILIEUCHUNG - Phần mềm xác định radio P12

Visions for systems beyond 3G foresee software defined radio as one of the core enablers of seamless service provision across the boundaries of different wireless transmission platforms. Such visions (. [1]), assume the use of different types of network [2] ranging from fixed (. xDSL) connections via short range wireless (PAN/VAN/HAN) schemes, wireless LANs and cellular radio networks to broadcast systems and beyond. Accessing such a variety of different networks will require highly flexible mobile terminals – a capability expected to be provided by software defined radios | Software Defined Radio Edited by Walter Tuttlebee Copyright 2002 John Wiley Sons Ltd ISBNs 0-470-84318-7 Hardback 0-470-84600-3 Electronic 12 Protocols and Network Aspects of SDR Klaus Moessner University of Surrey and Virtual Centre of Excellence in Mobile and Personal Communications Visions for systems beyond 3G foresee software defined radio as one of the core enablers of seamless service provision across the boundaries of different wireless transmission platforms. Such visions . 1 assume the use of different types of network 2 ranging from fixed . xDSL connections via short range wireless PAN VAN HAN schemes wireless LANs and cellular radio networks to broadcast systems and beyond. Accessing such a variety of different networks will require highly flexible mobile terminals - a capability expected to be provided by software defined radios. However not only do the air interface transmission schemes of the aforementioned network access technologies differ but so do the protocol stacks deployed in each of these access networks. The visions of future communication systems also foresee interconnection of these different access networks using IP-based core networks the concept being to support every variety of network-air interface with a common transport signaling and service provision platform. Apart from connectivity via such an IP-based core network the single access networks will need to provide a support infrastructure for the reconfiguration of software defined terminals. Reference 3 outlines three major requirements to be provided through such access support and core-network integration connectivity between access and core networks internetworking between different access schemes . inter- and intrasystem handoffs QoS negotiation security and mobility support the ability to interface with new and existing radio interfaces. The core and access networks in such a future integrated environment also will need a means for secure and trustworthy provision of

• Kĩ thuật Viễn thông
• Xác định radio
• phần mềm radio
• trình điều khiển radio
• phát thanh
• kỹ thuật SDR
• Ứng dụng công nghệ RFID
• Công nghệ RFID
• Xác định vị trí container trong cảng container
• Xác định vị trí container
• Định danh sử dụng sóng Radio
• Quản lý cảng