Spectrum Sharing System Centralized Network Time Slot Resources Allocation Strategy Research

Today, wireless communications occupy an increasingly important role in people’sdaily lives. Therefore, wireless communication is increasingly frequent, the country-led,the behavior of the wireless communication spectrum allocation license, leading toallocate licensed spectrum resources for wireless communication is becoming poor.FCC research shows that on the one hand the suitable and available spectrum is alreadyvery poor, on the other hand the utilization of radio and television frequencies that havegood transmission effect are very low. The national863project that I have participatedin, dynamic spectrum sharing demonstration system, is in a mixed network structure.Without affecting the main users of radio and television spectrum the project wants toreuse of spectrum resources. The main target of this thesis is to resolve the problem inthe infrastructure MAC design and implementation, propose Direct Link TransmissionMechanism (DLTM) instead of Up-Down Symmetric Link Transmission Mechanism(U-DSLTM), propose Time Slot Resource Duplex Allocate (TSDRA) instead of TimeSlot Resource Allocate (TSRA). This thesis will include: design and implementation ofinfrastructure MAC, introduction of infrastructure MAC transmission and theimprovement, infrastructure MAC TSRA and the improvement. My work in thecontents of this thesis is three points as follows.Firstly, this thesis discuses design and implementation of MAC underinfrastructure cognitive radio network. Introduction The national863project which Ihave participated in,dynamic spectrum sharing demonstration system. Thecommunication protocol in infrastructure cognitive radio network: UE apply access intonetwork protocol, primary avoid protocol, AP manage UE information protocol,Gate-Way manage protocol, and time slot resource manage protocol.Secondly, introduction infrastructure cognitive radio network implementationtransmission mechanism U-DSLTM, and analyze the abuse in U-DSLTM. To be aimedat the abuse, a new transmission mechanism DLTM will be given. Compare the networkthroughput and average delay preferences in U-DSLTM and DLTM. And theconclusion will be given. Thirdly, introduction infrastructure cognitive radio network implementation timeslot allocation algorithm TSRA, and compose the DLTM. A new time slot allocationalgorithm TSDRA will be given. Under the DLTM, compare the network throughputand average delay preferences in TSRA and TSDRA. And the conclusion will be given.