| With the wide application of wireless network,many 2.4 GHz wireless networks may cause co-frequency interference when working in the same scene.In recent years,with the development of silicon technology and integration technology,various 2.4 GHz wireless network communication cores are integrated on the same chip,which makes the system more comprehensive and intelligent.Many applications have the requirements of low latency and high throughput,in order to meet the growing demand,NoC(network on chip)system constructs a communication architecture suitable for expansion,in order to improve the performance of the system.Future multi-core chips are expected to be heterogeneous and hierarchical in nature,different network communication cores are integrated on the same chip,which may cause wireless signal interference and delay when communicating between networks on chip.Therefore,it is necessary to design a heterogeneous multi-core multi-network communication system integrated on-chip network system,so that different communication networks can work independently without interference,the research contents of this paper include the following parts:1.This paper mainly introduces the mutual interference of wireless co-frequency HF communication,introduces the research status of NoC system,and analyses the status of task scheduling and interference of wireless communication.2.Four kinds of mathematical models of wireless co-frequency network communication are established,quantitative analysis in time domain and frequency domain shows that communication interference can cause data delay,data packet loss and even communication failure in other network systems.The results of board-level experiments under simulated environment show that the interference of high power,high broadband and wide bandwidth networks is especially serious to other network systems.This paper introduces dynamic task scheduling algorithm and static task scheduling algorithm,and expounds the existing research methods of spectrum sensing strategy and frequency domain control.3.The architecture of heterogeneous multi-core processor system based on NoC is designed,which is based on 2D-Mesh framework.It mainly includes four kinds of wireless network communication cores and DSP core,switching nodes,resource nodes,network on chip communication protocols and network on chip communication routing algorithm,so that the system can avoid congestion control.4.Based on the research of interference avoidance in time domain,heterogeneous multi-core task scheduling is used to schedule communication cores.This paper proposes HMTS(heterogeneous multi-core task scheduling)algorithm,which can effectively make different types of tasks can be crossed and avoid overlap in time domain.5.Based on the research of interference avoidance in frequency domain,we mainly use direct sequence spread spectrum-linear frequency modulation,fractional Fourier transform and other technologies to widen the spectrum and control the filtering,so as to improve the utilization of spectrum resources,balance the channel load and improve the communication quality.The spectrum sensing strategy and multi-channel cooperation mechanism are used to control the frequency domain,improving the communication performance of the network.In this paper,a heterogeneous multi-core processor system based on NoC architecture is simulated and validated.The results show that the proposed system can reduce network latency and avoid data packet transmission conflicts.The experimental simulation of interference avoidance in frequency domain shows that the proposed method can reduce the bit error rate,improve the packet reception rate and reduce the network system delay by using multi-channel cooperation mechanism.The research of this topic provides theoretical and technical support for heterogeneous multi-core wireless network communication,which has great significance for the integration of multiple wireless networks and has practical significance for the intelligent use of CPU core. |
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