Dynamic Interference Management At Multi-domain In Wireless Communication Networks

The rapid growth of data traffic,the increase in the number of interconnected devices,and the emergence of new services are placing new demands on existing mobile network capacity.Intensive network deployment ensures the seamless coverage and good mobility,increasing the capacity of the communication network.However,the interference suffered by boundary users caused by the dense deployment severely restricts the improvement of the overall performance of the communication system.The new generation of wireless communication technology makes it possible to make full use of multi-domain communication resources.Therefore,the use of multi-domain resources for effective interference management has become one of the important research directions in the development of wireless communication today.In the existing research,IMs such as Interference neutralization and Steering are designed on asymmetric interference channels.Whereas in reality,the interfered scenarios of the boundary users are almost symmetrical.When such IMs are applied to a symmetric interference channel,the interference management signals will bring side effect.In addition,any interference management is based on the premise of consuming a certain communication resource,and the communication overhead problem is also a key factor affecting the performance of system.Based on the two above observations,we design new IM schemes in symmetrical networks.First,in view of the path loss and difference of BSs transmit power,we propose Symmetric-Dynamic Interference Neutralization based on downlink hybrid cellular network.Each BS generates a neutralization signal for its serving user,and dynamically adjusts the proportion of the interference to neutralize,which controls and utilizes the side effects of the neutralization signal.The system can adaptively determine the optimal proportion.Sym-DIN will achieve the optimal allocation of desired signal power and overhead,enhancing the spectral efficiency of system.Taking into account the use of profuse spatio sources,based on the above design,we propose Spatio--Power Domain Adaptive Interference Steering for X interference topology.Each transmitter generates a steering signal to modify the spatial feature of the original interference,so that the steered interference at the victim receiver is orthogonal to its desired signal.Meanwhile,the spatial characteristics of the steering signal are adaptively selected to achieve the maximum system capacity,which makes side effects the most utilized.SPAIS brings interference-free recovery of desired data and full reuse of steering overhead,which can significantly enhance the spectrum efficiency of the system.At the end of this thesis,we conclude the research work and give directions for the future work.