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1、Journal ofCommunication and Computer 10(2013)918-925 A ReConfigUratiOn Trial on the PlatfOrm of Allied Information for Wireless Converged Networks Xin Su，Jie Zeng，Yuan You，Lili Liu and Xibin Xu Tsinghua National Laboratory fo，Information Science and Technology,Research Institute of Information Techn
2、ology，Tsinghua University，Belting 100084，China Received：April 28，2013Accepted：June 01，2013Published：July 31，2013 Abstract：PAl(platform of allied information)promotes persistent innovation and application of the wireless technologies among different institutes，based on open，safe and controllable netw
3、ork architectureThe platform architecture，unified interface，security mechanism，and reconfiguration are designed to achieve the convergence of various wireless experimental resourcesIn this paper， the reconfiguration mechanism is designed and a reconfiguration trial is implemented based on the PAI，to
4、 verify the ability of integrating experimental resources in the related units Key words：Wireless communication，reconfiguration，convergence，PAI 1Introduction In recent years，wireless communications have had a rapid development with the emerging of new wireless technologies，including cognitive radio1
5、， network coding2】，cooperation and coordinated transmission【3，4】，self organizing network【5，and SO onBut，most of them are still in the stage of theoretical research or smallscale validation without largescale trials verified which restricts their further developmentAt the same time，wireless experimen
6、tal resources in different forms，such as the wireless devices， simulation environment， experimental instruments，software modules，scatter in different places with the lack of unified usageIn order to meet the needs of resource sharing，these different resources should be integrated to work for the inn
7、ovation and application research of wireless technologyThus， with the support of National Science and Technology Major Project，Tsinghua University initiates and Corresp0nding author：Jie Zeng，MSc，engineer，research fields：broadband wireless access，software defined radio， 4GB4G technology and standardi
8、zation Email： zengj ietsinghuaeducn constructs an environment named PIatfo1TI1 of Allied Information，as shown in Fig1，for development and verification of various new wireless technology and new services with related universities and companies 0ne of the basic tasks of PAI iS to build an open safe an
9、d controllable transmission platfoITIIWith PAI the crossregion and interunit remote collaborative researches and developments of wireless technology can be achieved，and the distributed experimental resources can be fully integrated and utilized for l Fig1 Resources sharing and collaborative developm
10、ent ofPAI A Reconfiguration Trial on the Platform of Allied Information for Wireless Converged NetwOrks 9 1 9 experimental verifications researches of new wireless technology and new services by more than one allied unit In this paper，the reconfiguration mechanism is designed and a reconfiguration t
11、rial is implemented based on PA1Through appropriate resource configuration and experiment configuration，wireless lnnovative experiment could be tested to prove the feasibility of the proposed reconfiguration mechanism The rest of this paper is organized as follows Section 2 introduces the major prob
12、lems solved bv PAIIn Section 3，we describe the design and implementation of PAI In Section 4，the reconfiguration mechanism is describedIn Section 5 we show the running of realtime reconfiguration Finally，we give a conclusion in the last section 2Major Problems Solved by PAl Considering the extensive
13、 flexibility，the open platform architecture is adoptedWe use the CERNET (China Education and Research Network)6as the wired transmission backbone as well as dedicated gateway devices and unified local interface as the access of the various experimental resourcesTo ensure real-time contro1 with highs
14、peed data transmission，there will be separate paths for data and control signa1 Resource management user management，experiment operation and other aspects are indepth considered and optimally designed 21 UnifyingSpecifications ofthelnte咖ce The specifications of the interface between the platforrn an
15、d experimental resources are clearly definedA scalable universal interface is designed tO support the access of various wireless devices， simulation environments，experimental instruments， and software modulesSome typical experimental resources are given as follows： (1)Wireless devices。such as USRP(u
16、niversal software radio periphera1)7，WARP8】； (2)Simulation environments，such as simulation platforms based on MATLAB，OPNET and NS2； (3)Experimental instruments，such as signa1 generators， spectrum analyzers， and channel simulators that are available to Interact； (4)Software modules，such as software developed by OSSIE9and GNU Radio10 22 Centralizing the Scheduling and Management Since the experimental resources are highly d
